CN115838367A - Organic electroluminescent material and device thereof - Google Patents
Organic electroluminescent material and device thereof Download PDFInfo
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- CN115838367A CN115838367A CN202110999329.3A CN202110999329A CN115838367A CN 115838367 A CN115838367 A CN 115838367A CN 202110999329 A CN202110999329 A CN 202110999329A CN 115838367 A CN115838367 A CN 115838367A
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- 239000000463 material Substances 0.000 title claims abstract description 65
- 150000001875 compounds Chemical class 0.000 claims abstract description 100
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 125000004432 carbon atom Chemical group C* 0.000 claims description 397
- -1 phosphino group Chemical group 0.000 claims description 154
- 125000001424 substituent group Chemical group 0.000 claims description 126
- 239000010410 layer Substances 0.000 claims description 74
- 125000001072 heteroaryl group Chemical group 0.000 claims description 63
- 125000003118 aryl group Chemical group 0.000 claims description 60
- 125000000217 alkyl group Chemical group 0.000 claims description 45
- 125000004404 heteroalkyl group Chemical group 0.000 claims description 43
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 41
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 40
- 229910052805 deuterium Inorganic materials 0.000 claims description 40
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 38
- 125000004104 aryloxy group Chemical group 0.000 claims description 35
- 125000000623 heterocyclic group Chemical group 0.000 claims description 35
- 229910052739 hydrogen Inorganic materials 0.000 claims description 34
- 239000001257 hydrogen Substances 0.000 claims description 34
- 125000003342 alkenyl group Chemical group 0.000 claims description 33
- 125000003545 alkoxy group Chemical group 0.000 claims description 32
- 229910052736 halogen Inorganic materials 0.000 claims description 30
- 150000002367 halogens Chemical class 0.000 claims description 30
- 150000002431 hydrogen Chemical class 0.000 claims description 30
- 125000005103 alkyl silyl group Chemical group 0.000 claims description 29
- 239000003446 ligand Substances 0.000 claims description 29
- 229910052757 nitrogen Inorganic materials 0.000 claims description 27
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 26
- 125000006413 ring segment Chemical group 0.000 claims description 26
- 125000005104 aryl silyl group Chemical group 0.000 claims description 24
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 24
- 125000002252 acyl group Chemical group 0.000 claims description 23
- 125000004185 ester group Chemical group 0.000 claims description 20
- 125000002843 carboxylic acid group Chemical group 0.000 claims description 19
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 claims description 19
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 17
- 125000003277 amino group Chemical group 0.000 claims description 16
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 16
- 125000002462 isocyano group Chemical group *[N+]#[C-] 0.000 claims description 16
- 125000000475 sulfinyl group Chemical group [*:2]S([*:1])=O 0.000 claims description 14
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 239000012044 organic layer Substances 0.000 claims description 12
- 238000006467 substitution reaction Methods 0.000 claims description 12
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 11
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- 229910052717 sulfur Inorganic materials 0.000 claims description 9
- SLGBZMMZGDRARJ-UHFFFAOYSA-N Triphenylene Natural products C1=CC=C2C3=CC=CC=C3C3=CC=CC=C3C2=C1 SLGBZMMZGDRARJ-UHFFFAOYSA-N 0.000 claims description 8
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- 239000004305 biphenyl Substances 0.000 claims description 8
- 125000005580 triphenylene group Chemical group 0.000 claims description 8
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- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 125000004988 dibenzothienyl group Chemical group C1(=CC=CC=2SC3=C(C21)C=CC=C3)* 0.000 claims description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 4
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 claims description 4
- 125000004076 pyridyl group Chemical group 0.000 claims description 4
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 3
- 125000002837 carbocyclic group Chemical group 0.000 claims description 3
- 150000004696 coordination complex Chemical class 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- 150000002739 metals Chemical group 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 claims description 3
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical group N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 2
- 125000002529 biphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C12)* 0.000 claims description 2
- 125000001153 fluoro group Chemical group F* 0.000 claims description 2
- 125000004957 naphthylene group Chemical group 0.000 claims description 2
- 125000006836 terphenylene group Chemical group 0.000 claims description 2
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 16
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- 238000003786 synthesis reaction Methods 0.000 description 11
- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 10
- 239000000758 substrate Substances 0.000 description 10
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 125000000304 alkynyl group Chemical group 0.000 description 9
- 239000002904 solvent Substances 0.000 description 9
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- 238000006243 chemical reaction Methods 0.000 description 8
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- 239000012074 organic phase Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 150000003384 small molecules Chemical class 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 6
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 6
- 238000004440 column chromatography Methods 0.000 description 6
- TXCDCPKCNAJMEE-UHFFFAOYSA-N dibenzofuran Chemical compound C1=CC=C2C3=CC=CC=C3OC2=C1 TXCDCPKCNAJMEE-UHFFFAOYSA-N 0.000 description 6
- 239000003480 eluent Substances 0.000 description 6
- 238000005538 encapsulation Methods 0.000 description 6
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 6
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 230000000670 limiting effect Effects 0.000 description 5
- 125000004433 nitrogen atom Chemical group N* 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 4
- FCEHBMOGCRZNNI-UHFFFAOYSA-N 1-benzothiophene Chemical compound C1=CC=C2SC=CC2=C1 FCEHBMOGCRZNNI-UHFFFAOYSA-N 0.000 description 4
- MYKQKWIPLZEVOW-UHFFFAOYSA-N 11h-benzo[a]carbazole Chemical compound C1=CC2=CC=CC=C2C2=C1C1=CC=CC=C1N2 MYKQKWIPLZEVOW-UHFFFAOYSA-N 0.000 description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 4
- 125000006615 aromatic heterocyclic group Chemical group 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
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- AWJUIBRHMBBTKR-UHFFFAOYSA-N isoquinoline Chemical compound C1=NC=CC2=CC=CC=C21 AWJUIBRHMBBTKR-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
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- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical group C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 229910000027 potassium carbonate Inorganic materials 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
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- 125000004429 atom Chemical group 0.000 description 3
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- 239000012634 fragment Substances 0.000 description 3
- 229910052732 germanium Inorganic materials 0.000 description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical group [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 3
- 125000005842 heteroatom Chemical group 0.000 description 3
- SKEDXQSRJSUMRP-UHFFFAOYSA-N lithium;quinolin-8-ol Chemical compound [Li].C1=CN=C2C(O)=CC=CC2=C1 SKEDXQSRJSUMRP-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052763 palladium Inorganic materials 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XSCHRSMBECNVNS-UHFFFAOYSA-N quinoxaline Chemical compound N1=CC=NC2=CC=CC=C21 XSCHRSMBECNVNS-UHFFFAOYSA-N 0.000 description 3
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- 229910052711 selenium Inorganic materials 0.000 description 3
- 125000005017 substituted alkenyl group Chemical group 0.000 description 3
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- 125000000547 substituted alkyl group Chemical group 0.000 description 3
- 125000003107 substituted aryl group Chemical group 0.000 description 3
- 125000005346 substituted cycloalkyl group Chemical group 0.000 description 3
- RFFLAFLAYFXFSW-UHFFFAOYSA-N 1,2-dichlorobenzene Chemical compound ClC1=CC=CC=C1Cl RFFLAFLAYFXFSW-UHFFFAOYSA-N 0.000 description 2
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 2
- 125000004972 1-butynyl group Chemical group [H]C([H])([H])C([H])([H])C#C* 0.000 description 2
- 125000004343 1-phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])(*)C([H])([H])[H] 0.000 description 2
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 2
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- WIUZHVZUGQDRHZ-UHFFFAOYSA-N [1]benzothiolo[3,2-b]pyridine Chemical compound C1=CN=C2C3=CC=CC=C3SC2=C1 WIUZHVZUGQDRHZ-UHFFFAOYSA-N 0.000 description 2
- DZBUGLKDJFMEHC-UHFFFAOYSA-N acridine Chemical compound C1=CC=CC2=CC3=CC=CC=C3N=C21 DZBUGLKDJFMEHC-UHFFFAOYSA-N 0.000 description 2
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- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
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- 229940125904 compound 1 Drugs 0.000 description 2
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- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 2
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 2
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- DHFABSXGNHDNCO-UHFFFAOYSA-N dibenzoselenophene Chemical compound C1=CC=C2C3=CC=CC=C3[se]C2=C1 DHFABSXGNHDNCO-UHFFFAOYSA-N 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 238000000295 emission spectrum Methods 0.000 description 2
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- RMBPEFMHABBEKP-UHFFFAOYSA-N fluorene Chemical group C1=CC=C2C3=C[CH]C=CC3=CC2=C1 RMBPEFMHABBEKP-UHFFFAOYSA-N 0.000 description 2
- 125000003800 germyl group Chemical class [H][Ge]([H])([H])[*] 0.000 description 2
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- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- VVVPGLRKXQSQSZ-UHFFFAOYSA-N indolo[3,2-c]carbazole Chemical compound C1=CC=CC2=NC3=C4C5=CC=CC=C5N=C4C=CC3=C21 VVVPGLRKXQSQSZ-UHFFFAOYSA-N 0.000 description 2
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- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 2
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- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
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- NIHNNTQXNPWCJQ-UHFFFAOYSA-N o-biphenylenemethane Chemical group C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 description 2
- 125000006504 o-cyanobenzyl group Chemical group [H]C1=C([H])C(C#N)=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
- 238000013086 organic photovoltaic Methods 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 125000004437 phosphorous atom Chemical group 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000002568 propynyl group Chemical group [*]C#CC([H])([H])[H] 0.000 description 2
- BBEAQIROQSPTKN-UHFFFAOYSA-N pyrene Chemical group C1=CC=C2C=CC3=CC=CC4=CC=C1C2=C43 BBEAQIROQSPTKN-UHFFFAOYSA-N 0.000 description 2
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 2
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- 150000003839 salts Chemical class 0.000 description 2
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 239000010703 silicon Chemical group 0.000 description 2
- 239000011593 sulfur Chemical group 0.000 description 2
- 125000004434 sulfur atom Chemical group 0.000 description 2
- 239000003826 tablet Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 2
- KTZQTRPPVKQPFO-UHFFFAOYSA-N 1,2-benzoxazole Chemical compound C1=CC=C2C=NOC2=C1 KTZQTRPPVKQPFO-UHFFFAOYSA-N 0.000 description 1
- BCMCBBGGLRIHSE-UHFFFAOYSA-N 1,3-benzoxazole Chemical compound C1=CC=C2OC=NC2=C1 BCMCBBGGLRIHSE-UHFFFAOYSA-N 0.000 description 1
- FLBAYUMRQUHISI-UHFFFAOYSA-N 1,8-naphthyridine Chemical compound N1=CC=CC2=CC=CN=C21 FLBAYUMRQUHISI-UHFFFAOYSA-N 0.000 description 1
- BNRDGHFESOHOBF-UHFFFAOYSA-N 1-benzoselenophene Chemical compound C1=CC=C2[se]C=CC2=C1 BNRDGHFESOHOBF-UHFFFAOYSA-N 0.000 description 1
- 125000004973 1-butenyl group Chemical group C(=CCC)* 0.000 description 1
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- 125000003718 tetrahydrofuranyl group Chemical group 0.000 description 1
- 125000001412 tetrahydropyranyl group Chemical group 0.000 description 1
- 125000003554 tetrahydropyrrolyl group Chemical group 0.000 description 1
- KTQYWNARBMKMCX-UHFFFAOYSA-N tetraphenylene Chemical group C1=CC=C2C3=CC=CC=C3C3=CC=CC=C3C3=CC=CC=C3C2=C1 KTQYWNARBMKMCX-UHFFFAOYSA-N 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 1
- 125000003777 thiepinyl group Chemical group 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- 125000002306 tributylsilyl group Chemical group C(CCC)[Si](CCCC)(CCCC)* 0.000 description 1
- 125000000025 triisopropylsilyl group Chemical group C(C)(C)[Si](C(C)C)(C(C)C)* 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- SLAJUCLVZORTHN-UHFFFAOYSA-N triphenylgermanium Chemical group C1=CC=CC=C1[Ge](C=1C=CC=CC=1)C1=CC=CC=C1 SLAJUCLVZORTHN-UHFFFAOYSA-N 0.000 description 1
- NHDIQVFFNDKAQU-UHFFFAOYSA-N tripropan-2-yl borate Chemical compound CC(C)OB(OC(C)C)OC(C)C NHDIQVFFNDKAQU-UHFFFAOYSA-N 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Images
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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- Electroluminescent Light Sources (AREA)
Abstract
Disclosed are an organic electroluminescent material and a device thereof. The organic electroluminescent material is a compound having a structure of formula 1. The compounds are useful as host materials in electroluminescent devices. These novel compounds can improve the efficiency of electroluminescent devices and provide better device performance. An electroluminescent device and a composition are also disclosed.
Description
Technical Field
The present invention relates to compounds for use in organic electronic devices, such as organic light emitting devices. More particularly, it relates to a compound having the structure of formula 1, and an organic electroluminescent device and composition comprising the same.
Background
Organic electronic devices include, but are not limited to, the following classes: organic Light Emitting Diodes (OLEDs), organic field effect transistors (O-FETs), organic Light Emitting Transistors (OLETs), organic Photovoltaics (OPVs), dye-sensitized solar cells (DSSCs), organic optical detectors, organic photoreceptors, organic field effect devices (OFQDs), light emitting electrochemical cells (LECs), organic laser diodes, and organic plasma light emitting devices.
In 1987, tang and Van Slyke, by Isman Kodak, reported a two-layer organic electroluminescent device comprising an arylamine hole transport layer and a tris-8-hydroxyquinoline-aluminum layer as an electron transport layer and a light-emitting layer (Applied Physics Letters,1987,51 (12): 913-915). Upon biasing the device, green light is emitted from the device. The invention lays a foundation for the development of modern Organic Light Emitting Diodes (OLEDs). The most advanced OLEDs may comprise multiple layers, such as charge injection and transport layers, charge and exciton blocking layers, and one or more light emitting layers between the cathode and anode. Since OLEDs are a self-emissive solid state device, it offers great potential for display and lighting applications. Furthermore, the inherent properties of organic materials, such as their flexibility, may make them well suited for particular applications, such as fabrication on flexible substrates.
OLEDs can be classified into three different types according to their light emitting mechanisms. The OLEDs invented by Tang and van Slyke are fluorescent OLEDs. It uses only singlet luminescence. The triplet states generated in the device are wasted through the non-radiative decay channel. Therefore, the Internal Quantum Efficiency (IQE) of fluorescent OLEDs is only 25%. This limitation hinders the commercialization of OLEDs. In 1997, forrest and Thompson reported phosphorescent OLEDs, which use triplet emission from complex-containing heavy metals as emitters. Thus, singlet and triplet states can be harvested, achieving 100% IQE. Due to its high efficiency, the discovery and development of phosphorescent OLEDs directly contributes to the commercialization of Active Matrix OLEDs (AMOLEDs). Recently, adachi has achieved high efficiency through Thermally Activated Delayed Fluorescence (TADF) of organic compounds. These emitters have a small singlet-triplet gap, making it possible to return excitons from the triplet state to the singlet state. In TADF devices, triplet excitons are able to generate singlet excitons through reverse intersystem crossing, resulting in high IQE.
OLEDs can also be classified into small molecule and polymer OLEDs depending on the form of the material used. Small molecule refers to any organic or organometallic material that is not a polymer. The molecular weight of small molecules can be large, as long as they have a precise structure. Dendrimers with well-defined structures are considered small molecules. The polymeric OLED comprises a conjugated polymer and a non-conjugated polymer having a pendant light-emitting group. Small molecule OLEDs can become polymer OLEDs if post-polymerization occurs during the fabrication process.
Various OLED fabrication methods exist. Small molecule OLEDs are typically fabricated by vacuum thermal evaporation. Polymer OLEDs are fabricated by solution processes such as spin coating, ink jet printing and nozzle printing. Small molecule OLEDs can also be made by solution processes if the material can be dissolved or dispersed in a solvent.
The light emitting color of the OLED can be realized by the structural design of the light emitting material. An OLED may comprise one light emitting layer or a plurality of light emitting layers to achieve a desired spectrum. Green, yellow and red OLEDs, phosphorescent materials have been successfully commercialized. Blue phosphorescent devices still have the problems of blue unsaturation, short device lifetime, high operating voltage, and the like. Commercial full-color OLED displays typically employ a hybrid strategy, using either blue fluorescence and phosphorescent yellow, or red and green. At present, the rapid decrease in efficiency of phosphorescent OLEDs at high luminance is still a problem. In addition, it is desirable to have a more saturated emission spectrum, higher efficiency and longer device lifetime.
CN111320612A discloses an organic electroluminescent compound, an organic optical compound with the following structure
Wherein the group a must contain at least 1N atom (heteroaryl). It does not disclose or teach the use of aryl groups attached to the nitrogen atom of the benzocarbazole.
WO2021132982A1 discloses an organic electroluminescent compound, an organic optical compound having the following structure
Wherein R is 1 The compound is of an amino structure, namely an amino group is bound on a parent nucleus of a benzonaphtho five-membered heterocyclic ring in the compound, and the introduction of the amino group with strong electron donating property can greatly change the charge transport property of the compound. It does not disclose or teach the use of linking only neutral or p-type groups to the benzocarbazole core structure.
KR20200056589A discloses an organic electroluminescent compound, an organic optical compound having the following structure
The triazine in the compound disclosed in the general formula is respectively connected with carbazole and 6-5-6 fused rings, but the application of the compound formed by connecting triazine and similar structures at specific positions of a specific benzocarbazole structure is not disclosed and taught.
However, there is still room for improvement in the currently reported host materials, and in order to meet the increasing demands of the industry, especially for the requirements of higher device efficiency, longer device lifetime, and lower driving voltage, the new materials still need to be further researched and developed.
Disclosure of Invention
The present invention aims to solve at least part of the above problems by providing a series of compounds having the structure of formula 1. The compounds are useful as host materials in organic electroluminescent devices. These novel compounds can improve the efficiency of electroluminescent devices and provide better device performance.
According to one embodiment of the present invention, a compound having a structure represented by formula 1 is disclosed:
wherein Ar is selected from substituted or unsubstituted aryl groups having 6 to 12 carbon atoms;
X 1 to X 9 Each time goes outSelected from N or CR, the occurrences of which are the same or different x ，
X 10 To X 14 Selected, identically or differently on each occurrence, from N or CR, and X 10 To X 14 At least one of which is N;
l is the same or different at each occurrence and is selected from the group consisting of a single bond and a substituted or unsubstituted arylene group having 6 to 30 carbon atoms;
R，R x each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermyl group having 6 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
adjacent substituents R, R x Can optionally be linked to form a ring.
According to another embodiment of the present invention, there is also disclosed an electroluminescent device comprising an anode, a cathode, and an organic layer disposed between the anode and the cathode; the organic layer comprises the compounds shown in the above examples.
According to another embodiment of the present invention, there is also disclosed a composition comprising the compound shown in the above embodiment.
The invention discloses a novel compound with a structure of formula 1, which can be used as a host material in an electroluminescent device. These novel compounds can improve the efficiency of electroluminescent devices and provide better device performance.
Drawings
Fig. 1 is a schematic representation of an organic light emitting device that can contain the compounds and compositions disclosed herein.
Fig. 2 is a schematic view of another organic light emitting device that can contain the compounds and compositions disclosed herein.
Detailed Description
OLEDs can be fabricated on a variety of substrates, such as glass, plastic, and metal. Fig. 1 schematically, but without limitation, illustrates an organic light emitting device 100. The figures are not necessarily to scale, and some of the layer structures in the figures may be omitted as desired. The device 100 may include a substrate 101, an anode 110, a hole injection layer 120, a hole transport layer 130, an electron blocking layer 140, an emissive layer 150, a hole blocking layer 160, an electron transport layer 170, an electron injection layer 180, and a cathode 190. The device 100 may be fabricated by sequentially depositing the described layers. The nature and function of the various layers and exemplary materials are described in more detail in U.S. Pat. No. 6-10 at column 6 of US7,279,704B2, which is incorporated herein by reference in its entirety.
There are more instances of each of these layers. For example, a flexible and transparent substrate-anode combination is disclosed in U.S. Pat. No. 5,844,363, which is incorporated by reference in its entirety. An example of a p-doped hole transport layer is doped with F at a molar ratio of 50 4 -TCNQ m-MTDATA as disclosed in U.S. patent application publication No. 2003/0230980, incorporated by reference in its entirety. Examples of host materials are disclosed in U.S. patent No. 6,303,238 to Thompson et al, which is incorporated by reference in its entirety. An example of an n-doped electron transport layer is BPhen doped with Li at a molar ratio of 1:1, as disclosed in U.S. patent application publication No. 2003/0230980, which is incorporated by reference in its entirety. U.S. Pat. Nos. 5,703,436 and 5,707,745, which are incorporated by reference in their entirety, disclose examples of cathodes including a cathode having a thin layer of a metal such as Mg: ag with an overlying transparent, conductive layerA composite cathode of a sputter deposited ITO layer. The principles and use of barrier layers are described in more detail in U.S. patent No. 6,097,147 and U.S. patent application publication No. 2003/0230980, which are incorporated by reference in their entirety. Examples of implant layers are provided in U.S. patent application publication No. 2004/0174116, which is incorporated by reference in its entirety. A description of a protective layer can be found in U.S. patent application publication No. 2004/0174116, which is incorporated by reference in its entirety.
The above-described hierarchical structure is provided via non-limiting embodiments. The function of the OLED may be achieved by combining the various layers described above, or some layers may be omitted entirely. It may also include other layers not explicitly described. Within each layer, a single material or a mixture of materials may be used to achieve optimal performance. Any functional layer may comprise several sub-layers. For example, the light emitting layer may have two layers of different light emitting materials to achieve a desired light emission spectrum.
In one embodiment, an OLED may be described as having an "organic layer" disposed between a cathode and an anode. The organic layer may include one or more layers.
The OLED also requires an encapsulation layer, as shown in fig. 2, which is an exemplary, non-limiting illustration of an organic light emitting device 200, which differs from fig. 1 in that an encapsulation layer 102 may also be included over the cathode 190 to protect against harmful substances from the environment, such as moisture and oxygen. Any material capable of providing an encapsulation function may be used as the encapsulation layer, such as glass or a hybrid organic-inorganic layer. The encapsulation layer should be placed directly or indirectly outside the OLED device. Multilayer film encapsulation is described in U.S. patent US7,968,146B2, the entire contents of which are incorporated herein by reference.
Devices manufactured according to embodiments of the present invention may be incorporated into various consumer products having one or more electronic component modules (or units) of the device. Some examples of such consumer products include flat panel displays, monitors, medical monitors, televisions, billboards, lights for indoor or outdoor lighting and/or signaling, head-up displays, fully or partially transparent displays, flexible displays, smart phones, tablet computers, tablet handsets, wearable devices, smart watches, laptop computers, digital cameras, camcorders, viewfinders, micro-displays, 3-D displays, vehicle displays, and tail lights.
The materials and structures described herein may also be used in other organic electronic devices as previously listed.
As used herein, "top" means furthest from the substrate, and "bottom" means closest to the substrate. Where a first layer is described as being "disposed on" a second layer, the first layer is disposed farther from the substrate. Other layers may be present between the first and second layers, unless it is specified that the first layer is "in contact with" the second layer. For example, a cathode can be described as being "disposed on" an anode even though various organic layers are present between the cathode and the anode.
As used herein, "solution processable" means capable of being dissolved, dispersed or transported in and/or deposited from a liquid medium in the form of a solution or suspension.
A ligand may be referred to as "photoactive" when it is believed that the ligand directly contributes to the photoactive properties of the emissive material. A ligand may be referred to as "ancillary" when it is believed that the ligand does not contribute to the photoactive properties of the emissive material, but the ancillary ligand may alter the properties of the photoactive ligand.
It is believed that the Internal Quantum Efficiency (IQE) of fluorescent OLEDs can be limited by delaying fluorescence beyond 25% spin statistics. Delayed fluorescence can generally be divided into two types, i.e., P-type delayed fluorescence and E-type delayed fluorescence. P-type delayed fluorescence results from triplet-triplet annihilation (TTA).
On the other hand, E-type delayed fluorescence does not depend on collision of two triplet states, but on conversion between a triplet state and a singlet excited state. Compounds capable of producing E-type delayed fluorescence need to have a very small mono-triplet gap in order to switch between energy states. Thermal energy can activate the transition from the triplet state back to the singlet state. This type of delayed fluorescence is also known as Thermally Activated Delayed Fluorescence (TADF). A significant feature of TADF is that the retardation component increases with increasing temperature. If the reverse intersystem crossing (RISC) rate is fast enough to minimize non-radiative decay from the triplet state, then the fraction of backfill singlet excited states may reach 75%. The total singlet fraction may be 100%, far exceeding 25% of the spin statistics of the electrogenerated excitons.
The delayed fluorescence characteristic of type E can be found in excited complex systems or in single compounds. Without being bound by theory, it is believed that E-type delayed fluorescence requires the light emitting material to have a small mono-triplet energy gap (Δ Ε) S-T ). Organic non-metal containing donor-acceptor emissive materials may be able to achieve this. The emission of these materials is generally characterized as donor-acceptor Charge Transfer (CT) type emission. Spatial separation of HOMO from LUMO in these donor-acceptor type compounds generally results in small Δ E S-T . These states may include CT states. Generally, donor-acceptor light emitting materials are constructed by linking an electron donor moiety (e.g., an amino or carbazole derivative) to an electron acceptor moiety (e.g., a six-membered, N-containing, aromatic ring).
Definition of terms with respect to substituents
Halogen or halide-as used herein, includes fluorine, chlorine, bromine and iodine.
Alkyl-as used herein, includes both straight and branched chain alkyl groups. The alkyl group may be an alkyl group having 1 to 20 carbon atoms, preferably an alkyl group having 1 to 12 carbon atoms, more preferably an alkyl group having 1 to 6 carbon atoms. Examples of alkyl groups include methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, n-undecyl, n-dodecyl, n-tridecyl, n-tetradecyl, n-pentadecyl, n-hexadecyl, n-heptadecyl, n-octadecyl, neopentyl, 1-methylpentyl, 2-methylpentyl, 1-pentylhexyl, 1-butylpentyl, 1-heptyloctyl, 3-methylpentyl. Among the above, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, neopentyl and n-hexyl are preferred. In addition, the alkyl group may be optionally substituted.
Cycloalkyl-as used herein, comprises a cyclic alkyl group. The cycloalkyl group may be a cycloalkyl group having 3 to 20 ring carbon atoms, preferably a cycloalkyl group having 4 to 10 carbon atoms. Examples of cycloalkyl groups include cyclobutyl, cyclopentyl, cyclohexyl, 4-methylcyclohexyl, 4,4-dimethylcyclohexyl, 1-adamantyl, 2-adamantyl, 1-norbornyl, 2-norbornyl, and the like. Among the above, cyclopentyl, cyclohexyl, 4-methylcyclohexyl, 4,4-dimethylcyclohexyl are preferred. In addition, the cycloalkyl group may be optionally substituted.
Heteroalkyl-as used herein, heteroalkyl comprises a alkyl chain wherein one or more carbons are substituted with a heteroatom selected from the group consisting of nitrogen, oxygen, sulfur, selenium, phosphorus, silicon, germanium and boron atoms. The heteroalkyl group may be a heteroalkyl group having 1 to 20 carbon atoms, preferably a heteroalkyl group having 1 to 10 carbon atoms, more preferably a heteroalkyl group having 1 to 6 carbon atoms. Examples of heteroalkyl groups include methoxymethyl, ethoxymethyl, ethoxyethyl, methylthiomethyl, ethylthiomethyl, ethylthioethyl, methoxymethoxymethyl, ethoxyethoxyethoxyethyl, hydroxymethyl, hydroxyethyl, hydroxypropyl, mercaptomethyl, mercaptoethyl, mercaptopropyl, aminomethyl, aminoethyl, aminopropyl, dimethylaminomethyl, trimethylgermylmethyl, trimethylgermylethyl, trimethylgermylisopropyl, dimethylethylgermylmethyl, dimethylisopropylgermylmethyl, tert-butyldimethylgermylmethyl, triethylgermylmethyl, triethylgermylethyl, triisopropylgermylmethyl, triisopropylgermylethyl, trimethylsilylmethyl, trimethylsilylethyl, trimethylsilylisopropyl, triisopropylsilylmethyl, triisopropylsilylethyl. In addition, heteroalkyl groups may be optionally substituted.
Alkenyl-as used herein, encompasses straight chain, branched chain, and cyclic olefin groups. The alkenyl group may be an alkenyl group containing 2 to 20 carbon atoms, preferably an alkenyl group having 2 to 10 carbon atoms. Examples of alkenyl groups include vinyl, propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1,3-butadienyl, 1-methylvinyl, styryl, 2,2-diphenylvinyl, 1,2-diphenylvinyl, 1-methylallyl, 1,1-dimethylallyl, 2-methylallyl, 1-phenylallyl, 2-phenylallyl, 3-phenylallyl, 3,3-diphenylallyl, 1,2-dimethylallyl, 1-phenyl-1-butenyl, 3-phenyl-1-butenyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, cycloheptenyl, cyclooctenyl, cyclooctatetraenyl and norbornenyl. In addition, alkenyl groups may be optionally substituted.
Alkynyl-as used herein, straight chain alkynyl groups are contemplated. The alkynyl group may be an alkynyl group containing 2 to 20 carbon atoms, preferably an alkynyl group having 2 to 10 carbon atoms. Examples of alkynyl groups include ethynyl, propynyl, propargyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-pentynyl, 2-pentynyl, 3,3-dimethyl-1-butynyl, 3-ethyl-3-methyl-1-pentynyl, 3,3-diisopropyl 1-pentynyl, phenylethynyl, phenylpropynyl, and the like. Among the above, preferred are ethynyl, propynyl, propargyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-pentynyl and phenylethynyl. In addition, alkynyl groups may be optionally substituted.
Aryl or aromatic-as used herein, non-fused and fused systems are contemplated. The aryl group may be an aryl group having 6 to 30 carbon atoms, preferably an aryl group having 6 to 20 carbon atoms, more preferably an aryl group having 6 to 12 carbon atoms. Examples of aryl groups include phenyl, biphenyl, terphenyl, triphenylene, tetraphenylene, naphthalene, anthracene, phenalene, phenanthrene, fluorene, pyrene,
perylene and azulene, preferably phenyl, biphenyl, terphenyl, triphenylene, fluorene and naphthalene. Examples of non-fused aryl groups include phenyl, biphenyl-2-yl, biphenyl-3-yl, biphenyl-4-yl, p-terphenyl-3-yl, p-terphenyl-2-yl, m-terphenyl-4-yl, m-terphenyl-3-yl, m-terphenyl-2-yl, o-tolyl, m-tolyl, p- (2-phenylpropyl) phenyl, 4 '-methyldiphenyl, 4' -tert-butyl-p-terphenyl-4-yl, o-cumyl, m-cumyl, p-cumyl, 2,3-xylyl, 3,4-xylyl, 2,5-xylyl, mesitylphenyl and m-quaterphenyl. In addition, the aryl group may be optionally substituted.
Heterocyclyl or heterocyclic-as used herein, non-aromatic cyclic groups are contemplated. The non-aromatic heterocyclic group includes a saturated heterocyclic group having 3 to 20 ring atoms and an unsaturated non-aromatic heterocyclic group having 3 to 20 ring atoms, at least one of which is selected from the group consisting of a nitrogen atom, an oxygen atom, a sulfur atom, a selenium atom, a silicon atom, a phosphorus atom, a germanium atom and a boron atom, and preferred non-aromatic heterocyclic groups are those having 3 to 7 ring atoms, which include at least one hetero atom such as nitrogen, oxygen, silicon or sulfur. Examples of non-aromatic heterocyclic groups include oxiranyl, oxetanyl, tetrahydrofuryl, tetrahydropyranyl, dioxolanyl, dioxanyl, aziridinyl, dihydropyrrolyl, tetrahydropyrrolyl, piperidinyl, oxazolidinyl, morpholinyl, piperazinyl, oxepinyl, thiepinyl, azepinyl, and tetrahydrosilolyl. In addition, the heterocyclic group may be optionally substituted.
Heteroaryl-as used herein, non-fused and fused heteroaromatic groups that may contain 1 to 5 heteroatoms, at least one of which is selected from the group consisting of a nitrogen atom, an oxygen atom, a sulfur atom, a selenium atom, a silicon atom, a phosphorus atom, a germanium atom and a boron atom. Heteroaryl also refers to heteroaryl. The heteroaryl group may be a heteroaryl group having 3 to 30 carbon atoms, preferably a heteroaryl group having 3 to 20 carbon atoms, more preferably a heteroaryl group having 3 to 12 carbon atoms. Suitable heteroaryl groups include dibenzothiophene, dibenzofuran, dibenzoselenophene, furan, thiophene, benzofuran, benzothiophene, benzoselenophene, carbazole, indolocarbazole, pyridine indole, pyrrolopyridine, pyrazole, imidazole, triazole, oxazole, thiazole, oxadiazole, oxatriazole, bisoxazole, thiadiazole, pyridine, pyridazine, pyrimidine, pyrazine, triazine, oxazine, oxathiazine, oxadiazine, indole, benzimidazole, indazole, indenozine, benzoxazole, benzisoxazole, benzothiazole, quinoline, isoquinoline, quinoline, quinazoline, quinoxaline, naphthyridine, phthalazine, pteridine, xanthene, acridine, phenazine, phenothiazine, benzofuropyridine, furobipyridine, benzothienopyridine, thienobipyridine, benzothiophene, cinnoline, selenobenzene, dibenzofuran, dibenzoselenophene, carbazole, indolocarbazole, imidazole, pyridine, triazine, benzimidazole, 3236 zzborane, 5262-oxazaborane, 5262 z3763, azazft-3, and aza-azole analogs thereof. In addition, the heteroaryl group may be optionally substituted.
Alkoxy-as used herein, is represented by-O-alkyl, -O-cycloalkyl, -O-heteroalkyl, or-O-heterocyclyl. Examples and preferred examples of the alkyl group, cycloalkyl group, heteroalkyl group and heterocyclic group are the same as those described above. The alkoxy group may be an alkoxy group having 1 to 20 carbon atoms, preferably an alkoxy group having 1 to 6 carbon atoms. Examples of alkoxy groups include methoxy, ethoxy, propoxy, butoxy, pentyloxy, hexyloxy, cyclopropyloxy, cyclobutyloxy, cyclopentyloxy, cyclohexyloxy, tetrahydrofuryloxy, tetrahydropyranyloxy, methoxypropyloxy, ethoxyethyloxy, methoxymethyloxy and ethoxymethyloxy. In addition, alkoxy groups may be optionally substituted.
Aryloxy-as used herein, is represented by-O-aryl or-O-heteroaryl. Examples and preferred examples of aryl and heteroaryl groups are the same as described above. The aryloxy group may be an aryloxy group having 6 to 30 carbon atoms, preferably an aryloxy group having 6 to 20 carbon atoms. Examples of the aryloxy group include a phenoxy group and a biphenyloxy group. In addition, the aryloxy group may be optionally substituted.
Aralkyl-as used herein, encompasses aryl-substituted alkyl groups. The aralkyl group may be an aralkyl group having 7 to 30 carbon atoms, preferably an aralkyl group having 7 to 20 carbon atoms, more preferably an aralkyl group having 7 to 13 carbon atoms. Examples of the aralkyl group include a benzyl group, a 1-phenylethyl group, a 2-phenylethyl group, a 1-phenylisopropyl group, a 2-phenylisopropyl group, a phenyl tert-butyl group, an α -naphthylmethyl group, a 1- α -naphthyl-ethyl group, a 2- α -naphthylethyl group, a 1- α -naphthylisopropyl group, a 2- α -naphthylisopropyl group, a β -naphthylmethyl group, a 1- β -naphthylethyl group, a 2- β -naphthylethyl group, a 1- β -naphthylisopropyl group, a 2- β -naphthylisopropyl group, a p-methylbenzyl group, a m-methylbenzyl group, an o-methylbenzyl group, a p-chlorobenzyl group, a m-chlorobenzyl group, a p-chlorobenzyl group, a m-bromobenzyl group, an o-bromobenzyl group, a p-iodobenzyl group, a m-iodobenzyl group, a p-hydroxybenzyl group, a m-hydroxybenzyl group, an o-hydroxybenzyl group, a p-aminobenzyl group, an m-aminobenzyl group, a p-nitrobenzyl group, a m-nitrobenzyl group, an o-cyanobenzyl group, a 1-hydroxy-2-phenylisopropyl group and a 1-chloro-2-isopropylyl group. Among the above, benzyl, p-cyanobenzyl, m-cyanobenzyl, o-cyanobenzyl, 1-phenylethyl, 2-phenylethyl, 1-phenylisopropyl and 2-phenylisopropyl are preferable. In addition, the aralkyl group may be optionally substituted.
Alkylsilyl-as used herein, alkyl substituted silyl is contemplated. The alkylsilyl group may be an alkylsilyl group having 3 to 20 carbon atoms, preferably an alkylsilyl group having 3 to 10 carbon atoms. Examples of the alkylsilyl group include trimethylsilyl group, triethylsilyl group, methyldiethylsilyl group, ethyldimethylsilyl group, tripropylsilyl group, tributylsilyl group, triisopropylsilyl group, methyldiisopropylsilyl group, dimethylisopropylsilyl group, tri-tert-butylsilyl group, triisobutylsilyl group, dimethyl-tert-butylsilyl group, and methyl-di-tert-butylsilyl group. Additionally, the alkylsilyl group may be optionally substituted.
Arylsilyl-as used herein, encompasses at least one aryl-substituted silicon group. The arylsilane group may be an arylsilane group having 6 to 30 carbon atoms, preferably an arylsilane group having 8 to 20 carbon atoms. Examples of the arylsilyl group include triphenylsilyl group, phenylbiphenylsilyl group, diphenylbiphenylsilyl group, phenyldiethylsilyl group, diphenylethylsilyl group, phenyldimethylsilyl group, diphenylmethylsilyl group, phenyldiisopropylsilyl group, diphenylisopropylsilyl group, diphenylbutylsilyl group, diphenylisobutylsilyl group, and diphenyltert-butylsilyl group. In addition, the arylsilyl group may be optionally substituted.
Alkylgermyl-as used herein, alkyl-substituted germyl is contemplated. The alkylgermyl group may be an alkylgermyl group having 3 to 20 carbon atoms, preferably an alkylgermyl group having 3 to 10 carbon atoms. Examples of the alkylgermyl group include a trimethylgermyl group, a triethylgermyl group, a methyldiethylgermyl group, an ethyldimethylgermyl group, a tripropylgermyl group, a tributylgermyl group, a triisopropylgermyl group, a methyldiisopropylgermyl group, a dimethylisopropylgermyl group, a tri-tert-butylgermyl group, a triisobutylgermyl group, a dimethyl-tert-butylgermyl group, and a methyl-di-tert-butylgermyl group. In addition, the alkylgermyl group may be optionally substituted.
Arylgermyl-as used herein, encompasses at least one aryl or heteroaryl substituted germyl. The arylgermanium group may be an arylgermanium group having 6 to 30 carbon atoms, preferably an arylgermanium group having 8 to 20 carbon atoms. Examples of the arylgermanium group include a triphenylgermanium group, a phenylbiphenylgermanium group, a diphenylbiphenylgermanium group, a phenyldiethylgermanium group, a diphenylethylgermanium group, a phenyldimethylgermanium group, a diphenylmethylgermanium group, a phenyldiisopropylgermanium group, a diphenylisopropylgermanium group, a diphenylbutylgermanium group, a diphenylisobutylgermanium group, a diphenylt-butylgermanium group. In addition, the arylgermyl group may be optionally substituted.
The term "aza" in aza-dibenzofuran, aza-dibenzothiophene, etc., means that one or more C-H groups in the corresponding aromatic moiety are replaced by a nitrogen atom. For example, azatriphenylenes include dibenzo [ f, h ] quinoxalines, dibenzo [ f, h ] quinolines, and other analogs having two or more nitrogens in the ring system. Other nitrogen analogs of the above-described aza derivatives may be readily envisioned by one of ordinary skill in the art, and all such analogs are intended to be encompassed within the terms described herein.
In this disclosure, unless otherwise defined, when any one of the terms in the group consisting of: substituted alkyl groups, substituted cycloalkyl groups, substituted heteroalkyl groups, substituted heterocyclyl groups, substituted aralkyl groups, substituted alkoxy groups, substituted aryloxy groups, substituted alkenyl groups, substituted alkynyl groups, substituted aryl groups, substituted heteroaryl groups, substituted alkylsilyl groups, substituted arylsilyl groups, substituted alkylgermyl groups, substituted arylgermyl groups, substituted amino groups, substituted acyl groups, substituted carbonyl groups, substituted carboxylic acid groups, substituted ester groups, substituted sulfinyl groups, substituted sulfonyl groups, substituted phosphino groups, and refers to alkyl groups, cycloalkyl groups, heteroalkyl groups, heterocyclyl groups, aralkyl groups, alkoxy groups, aryloxy groups, alkenyl groups, alkynyl groups, aryl groups, heteroaryl groups, alkylsilyl groups, arylgermyl groups, amino groups, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, sulfinyl groups, sulfonyl groups, and phosphino groups, any one or more of which may be substituted with deuterium, halogen, unsubstituted alkyl groups having 1 to 20 carbon atoms, unsubstituted cycloalkyl groups having 3 to 20 carbon atoms, unsubstituted heteroalkyl groups having 1 to 20 carbon atoms, unsubstituted arylalkyl groups having 3 to 20 carbon atoms, unsubstituted arylalkyl groups having 2 to 6 carbon atoms, unsubstituted aryl groups having 2 to 20 carbon atoms, unsubstituted alkylgermyl groups having 3 to 20 carbon atoms, unsubstituted arylgermyl groups having 6 to 20 carbon atoms, unsubstituted amino groups having 0 to 20 carbon atoms, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof.
It will be understood that when a molecular fragment is described as a substituent or otherwise attached to another moiety, its name may be written depending on whether it is a fragment (e.g., phenyl, phenylene, naphthyl, dibenzofuranyl) or depending on whether it is an entire molecule (e.g., benzene, naphthalene, dibenzofuran). As used herein, these different ways of specifying substituents or linking fragments are considered to be equivalent.
In the compounds mentioned in the present disclosure, a hydrogen atom may be partially or completely replaced by deuterium. Other atoms such as carbon and nitrogen may also be replaced by their other stable isotopes. Substitutions of other stable isotopes in the compounds may be preferred because they enhance the efficiency and stability of the device.
In the compounds mentioned in the present disclosure, polysubstitution is meant to encompass disubstituted substitutions up to the maximum range of available substitutions. When a substituent in a compound mentioned in the present disclosure represents multiple substitution (including di-substitution, tri-substitution, tetra-substitution, etc.), that is, it means that the substituent may exist at a plurality of available substitution positions on its connecting structure, and the substituent existing at each of the plurality of available substitution positions may be the same structure or different structures.
In the compounds mentioned in the present disclosure, adjacent substituents in the compounds cannot be linked to form a ring unless specifically defined, for example, adjacent substituents can be optionally linked to form a ring. In the compounds mentioned in the present disclosure, adjacent substituents can optionally be linked to form a ring, both in the case where adjacent substituents may be linked to form a ring and in the case where adjacent substituents are not linked to form a ring. When adjacent substituents can optionally be joined to form a ring, the ring formed can be monocyclic or polycyclic (including spiro, bridged, fused, etc.), as well as alicyclic, heteroalicyclic, aromatic or heteroaromatic rings. In this expression, adjacent substituents may refer to substituents bonded to the same atom, substituents bonded to carbon atoms directly bonded to each other, or substituents bonded to carbon atoms further away. Preferably, adjacent substituents refer to substituents bonded to the same carbon atom as well as substituents bonded to carbon atoms directly bonded to each other.
The expression that adjacent substituents can optionally be linked to form a ring is also intended to mean that two substituents bonded to the same carbon atom are linked to each other by a chemical bond to form a ring, which can be exemplified by the following formula:
the expression that adjacent substituents can optionally be linked to form a ring is also intended to mean that two substituents bonded to carbon atoms directly bonded to each other are linked to each other by a chemical bond to form a ring, which can be exemplified by the following formula:
the expression that adjacent substituents can optionally be linked to form a ring is also intended to mean that two substituents bonded to further away carbon atoms are linked to each other by a chemical bond to form a ring, which can be exemplified by the following formula:
further, the expression that adjacent substituents can be optionally linked to form a ring is also intended to be taken to mean that, in the case where one of the adjacent two substituents represents hydrogen, the second substituent is bonded at the position to which the hydrogen atom is bonded, thereby forming a ring. This is exemplified by the following equation:
according to one embodiment of the present invention, a compound having a structure represented by formula 1 is disclosed:
wherein Ar is selected from substituted or unsubstituted aryl groups having 6 to 12 carbon atoms;
X 1 to X 9 Selected, identically or differently, on each occurrence from N or CR x ，
X 10 To X 14 Selected, identically or differently on each occurrence, from N or CR, and X 10 To X 14 At least one of which is N;
l is the same or different at each occurrence and is selected from the group consisting of a single bond and a substituted or unsubstituted arylene group having 6 to 30 carbon atoms;
R，R x each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, or a pharmaceutically acceptable salt thereofA substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
adjacent substituents R, R x Can optionally be linked to form a ring.
In this example, the adjacent substituents R, R x Can optionally be linked to form a ring, is intended to mean a ring in which adjacent groups of substituents are present, for example, between adjacent substituents R, adjacent substituents R x Any one or more of them can be connected to form a ring. Obviously, these adjacent substituent groups may not be connected to form a ring.
In this embodiment, when R is x When present, the alkyl, cycloalkyl, heteroalkyl, heterocyclyl, aralkyl, alkoxy, aryloxy, sulfonyl, aryl, heteroaryl, sulfonyl, phosphino groups may be substituted, either identically or differently, with one or more groups selected from the group consisting of substituted alkyl, substituted cycloalkyl, substituted heteroalkyl, substituted heterocyclyl, substituted aralkyl, substituted alkoxy, substituted aryloxy, substituted alkenyl, substituted aryl, substituted carboxylic acid, substituted ester, substituted sulfinyl, substituted sulfonyl, and substituted phosphino groups, the alkyl, cycloalkyl, heteroalkyl, heterocyclyl, aralkyl, alkoxy, aryloxy, alkenyl, aryl, heteroaryl, alkylsilyl, arylsilyl, alkylgermyl, arylgermyl, amino, acyl, carbonyl, carboxylic acid, ester, sulfinyl, sulfonyl, and phosphino groups being substituted, either identically or differently, with one or more groups selected from the group consisting of: deuterium, halogen, unsubstituted withAn alkyl group of 1 to 20 carbon atoms, an unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, an unsubstituted heteroalkyl group having 1 to 20 carbon atoms, an unsubstituted heterocyclyl group having 3 to 20 ring carbon atoms, an unsubstituted aralkyl group having 7 to 30 carbon atoms, an unsubstituted alkoxy group having 1 to 20 carbon atoms, an unsubstituted aryloxy group having 6 to 30 carbon atoms, an unsubstituted alkenyl group having 2 to 20 carbon atoms, an unsubstituted alkynyl group having 2 to 20 carbon atoms, an unsubstituted aryl group having 6 to 30 carbon atoms, an unsubstituted heteroaryl group having 3 to 30 carbon atoms, an unsubstituted alkylsilyl group having 3 to 20 carbon atoms, an unsubstituted arylsilyl group having 6 to 20 carbon atoms, an unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, an unsubstituted arylgermanyl group having 6 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof.
According to one embodiment of the invention, in formula 1, the R, R x Ar is selected from neutral or p-type groups such as hydrogen, deuterium, alkyl, aryl, and heteroaryl (e.g., carbazole) and the like, but is not suitable for selecting strong electron donating groups such as arylamine groups.
According to an embodiment of the invention, wherein X 1 To X 9 Selected from CR, identically or differently at each occurrence x 。
According to one embodiment of the present invention, wherein X 1 To X 9 At least 1 of which is selected from N.
According to an embodiment of the invention, wherein R is x Each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, substituted or unsubstituted alkenyl groups having 2 to 20 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6 to 20 carbon atoms, cyano groups, isocyano groups,hydroxyl, mercapto, and combinations thereof;
adjacent substituents R x Can optionally be linked to form a ring.
In this example, the adjacent substituents R x Can optionally be linked to form a ring, is intended to denote any adjacent substituent R therein x Can be linked to form a ring. Obviously, these adjacent substituents R x Or may be both unconnected to form a ring.
According to one embodiment of the present invention, wherein the compound has a structure represented by one of formula 1-a to formula 1-g:
wherein Ar is selected from substituted or unsubstituted aryl groups having 6 to 12 carbon atoms; x 10 To X 14 Is selected, identically or differently on each occurrence, from N or CR, and X 10 To X 14 At least one of which is N;
l is the same or different at each occurrence and is selected from the group consisting of: a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms;
R x1 the same or different at each occurrence is indicative of mono-, poly-or unsubstituted;
R，R x1 each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, substituted or unsubstituted aryl group having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, substituted or unsubstituted aryl group having 6 to 20 carbon atomsA silane group, a substituted or unsubstituted alkylgermyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermyl group having 6 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, and combinations thereof;
adjacent substituents R, R x1 Can optionally be linked to form a ring.
In this context, the adjacent substituents R, R x1 Can optionally be linked to form a ring, is intended to mean a ring in which any adjacent substituents R can be linked to each other, any adjacent substituents R x1 Can be connected to form a ring. Obviously, any adjacent substituents R, R x1 May not be connected to form a ring.
According to an embodiment of the invention, wherein R is x1 Each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3 to 20 ring atoms, substituted or unsubstituted aralkyl groups having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy groups having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy groups having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl groups having 2 to 20 carbon atoms, substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, and combinations thereof; and when said R is x1 (ii) when selected, identically or differently on each occurrence, from substituted alkyl, substituted cycloalkyl, substituted heteroalkyl, substituted heterocyclyl, substituted aralkyl, substituted alkoxy, substituted aryloxy, substituted alkenyl, substituted aryl or substituted heteroaryl, any of said alkyl, cycloalkyl, heteroalkyl, heterocyclyl, aralkyl, alkoxy, aryloxy, alkenyl, aryl and heteroaryl is substituted with one or more groups selected from the group consisting of: deuterium, halogen, unsubstituted alkyl radicals having 1 to 20 carbon atoms, unsubstituted cycloalkanes having 3 to 20 ring carbon atomsA group, an unsubstituted heteroalkyl group having 1 to 20 carbon atoms, an unsubstituted heterocyclyl group having 3 to 20 ring atoms, an unsubstituted aralkyl group having 7 to 30 carbon atoms, an unsubstituted alkoxy group having 1 to 20 carbon atoms, an unsubstituted aryloxy group having 6 to 30 carbon atoms, an unsubstituted alkenyl group having 2 to 20 carbon atoms, an unsubstituted alkynyl group having 2 to 20 carbon atoms, an unsubstituted aryl group having 6 to 30 carbon atoms, an unsubstituted heteroaryl group having 3 to 30 carbon atoms, an unsubstituted alkylsilyl group having 3 to 20 carbon atoms, an unsubstituted arylsilyl group having 6 to 20 carbon atoms, an unsubstituted alkylgermyl group having 3 to 20 carbon atoms, an unsubstituted arylgermyl group having 6 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
adjacent substituents R x1 Can optionally be linked to form a ring.
In this context, the adjacent substituents R x1 Can optionally be linked to form a ring, is intended to denote any adjacent substituent R therein x1 Can be connected to form a ring. Obviously, any adjacent substituents R x1 May not be connected to form a ring.
According to one embodiment of the invention, wherein R x1 Each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, fluorine, cyano, methyl, ethyl, tert-butyl, phenyl, biphenyl, triphenylene, naphthyl, dibenzothienyl, dibenzofuranyl, fluorenyl, pyridyl, and combinations thereof.
According to an embodiment of the invention, wherein X 10 To X 14 Three of which are N.
According to an embodiment of the invention, wherein X 10 、X 12 And X 14 Is N.
According to one embodiment of the invention, wherein said R is selected, identically or differently on each occurrence, from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, cyano, isocyano, hydroxy, mercapto, and combinations thereof;
adjacent substituents R can optionally be linked to form a ring.
Herein, adjacent substituents R can optionally be linked to form a ring, intended to mean wherein any adjacent substituent R can be linked to form a ring. Obviously, any adjacent substituents R may not be connected to each other to form a ring.
According to one embodiment of the invention, wherein at least one of said R, on each occurrence, is selected, identically or differently, from deuterium, halogen, cyano, substituted or unsubstituted aryl having 6 to 30 carbon atoms, or substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms.
According to an embodiment of the invention, wherein at least one of said R, taken on each occurrence, is selected, identically or differently, from deuterium, fluoro, cyano, phenyl, biphenyl, triphenylene, naphthyl, dibenzothienyl, dibenzofuranyl, fluorenyl, pyridyl, and combinations thereof.
According to an embodiment of the present invention, wherein Ar is selected from a structure represented by one of formulae 2-a to 2-c:
wherein Y is selected from CR, the same or different at each occurrence y ；
R y Each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted cycloalkyl having 1 to 20 carbon atomsA heteroalkyl group, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, and combinations thereof;
wherein
Represents a position in the structure of Ar to which the N atom in formula 1 is bonded.
According to an embodiment of the invention, wherein R is y Each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, and combinations thereof.
According to one embodiment of the invention, wherein Ar is phenyl, biphenyl or naphthyl.
According to one embodiment of the invention, wherein said L is selected, identically or differently on each occurrence, from a single bond or a substituted or unsubstituted arylene group having 6 to 24 carbon atoms.
According to one embodiment of the invention, wherein said L is selected, identically or differently at each occurrence, from the group consisting of: a single bond, phenylene, naphthylene, biphenylene, terphenylene, triphenylene.
According to one embodiment of the invention, wherein said L, equal or different at each occurrence, is selected from the group consisting of:
according to one embodiment of the invention, wherein hydrogen in said L-1 to L-8 can be partially or completely substituted by deuterium.
According to one embodiment of the present invention, wherein the compound has a structure represented by formula 1-1 or formula 1-2:
wherein R is y The same or different at each occurrence is indicative of mono-, poly-or unsubstituted;
R y each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, an isocyanide group, a cyano group, and combinations thereof;
r is selected, identically or differently on each occurrence, from substituted or unsubstituted aryl having 6 to 30 carbon atoms or substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms.
In this example, any adjacent substituent R y Are not connected to form a ring.
According to an embodiment of the present invention, wherein, in formula 1-1 or formula 1-2, the R y Each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, and combinations thereof.
According to an embodiment of the invention, wherein said compound is selected from the group consisting of compound 1 to compound 288. For specific structures of compound 1 through compound 288, see claim 10.
According to an embodiment of the present invention, wherein hydrogen energy in said compounds 1 to 288 is partially or completely substituted by deuterium.
According to an embodiment of the present invention, there is also disclosed an electroluminescent device, including:
an anode, a cathode, a anode and a cathode,
a cathode electrode, which is provided with a cathode,
and an organic layer disposed between the anode and the cathode, the organic layer comprising a compound having a structure of formula 1, the specific structure of the compound being as shown in any one of the preceding examples.
According to one embodiment of the present invention, in the device, the organic layer is a light emitting layer, and the compound is a host material.
According to one embodiment of the invention, in the device, the light emitting layer further comprises at least one phosphorescent light emitting material.
According to one embodiment of the invention, in the device, the phosphorescent light-emitting material is a metal complex and has M (L) a ) m (L b ) n (L c ) q A general formula (II) of (I);
wherein M is selected from metals having a relative atomic mass greater than 40;
L a 、L b 、L c a first ligand, a second ligand and a third ligand which are respectively coordinated with the M; l is a 、L b 、L c Optionally linked to form a multidentate ligand; for example, L a 、L b And L c Any two of which can be linked to form a tetradentate ligand; also for example, L a 、L b And L c Can be connected with each other to form a hexadentate ligand; or also for example L a 、L b 、L c Are not linked so as not to form a multidentate ligand;
L a 、L b 、L c may be the same or different; m is 1,2 or 3; n is 0, 1 or 2; q is 0 or 1; the sum of M, n, q is equal to the oxidation state of said M; when m is greater than or equal to 2, a plurality of L a May be the same or different; when n is 2, two L b May be the same or different;
L a has a structure as shown in formula 3:
wherein,
ring D is selected from a 5-membered heteroaromatic ring or a 6-membered heteroaromatic ring;
ring E is selected from a 5-membered unsaturated carbocyclic ring, a phenyl ring, a 5-membered heteroaromatic ring, or a 6-membered heteroaromatic ring;
ring D and ring E via U a And U b Fusing;
U a and U b Selected from C or N, identically or differently at each occurrence;
R d ，R e the same or different at each occurrence denotes mono-, poly-or unsubstituted;
V 1 -V 4 selected from CR, identically or differently at each occurrence v Or N;
R d ，R e ，R v each occurrence, identically or differently, is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, or a pharmaceutically acceptable salt thereofA substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclyl group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
adjacent substituents R d ，R e ，R v Can be optionally linked to form a ring;
L b 、L c each occurrence, identically or differently, is selected from any one of the following structures:
wherein,
R a ，R b and R c The same or different at each occurrence represents mono-, poly-, or no substitution;
X b each occurrence, the same or different, is selected from the group consisting of: o, S, se, NR N1 And CR C1 R C2 ；
X c And X d Each occurrence, the same or different, is selected from the group consisting of: o, S, se and NR N2 ；
R a ，R b ，R c ，R N1 ，R N2 ，R C1 And R C2 Each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
the ligand L b 、L c In the structure (1), adjacent substituents R a ，R b ，R c ，R N1 ，R N2 ，R C1 And R C2 Can optionally be linked to form a ring.
In this context, adjacent substituents R d ，R e ，R v Can optionally be linked to form a ring, is intended to mean when a substituent R is present d A substituent R e A substituent R v In which adjacent substituent groups, e.g. adjacent substituent groups R d Adjacent and adjacent substituents R e Adjacent and adjacent substituents R v Adjacent and adjacent substituents R d And R e Adjacent and adjacent substituents R d And R v The substituents R between, and adjacent to e And R v Any one or more of these adjacent substituent groups can be linked to form a ring. Obviously, when the substituent R is present d A substituent R e A substituent R v When the substituents are not linked, they may be present in the form ofAnd (4) a ring.
In this example, the adjacent substituents R a ，R b ，R c ，R N1 ，R N2 ，R C1 And R C2 Can optionally be linked to form a ring, intended to denote an adjacent substituent group therein, e.g. two substituents R a In between, two substituents R b In between, two substituents R c Of a substituent R a And R b Of a substituent R a And R c Of a substituent R b And R c Of a substituent R a And R N1 Of a substituent R b And R N1 Of a substituent R a And R C1 Of a substituent R a And R C2 Of a substituent R b And R C1 Of a substituent R b And R C2 Of a substituent R a And R N2 Of R is a substituent b And R N2 And R is C1 And R C2 And any one or more of these substituent groups may be linked to form a ring. Obviously, none of these substituents may be connected to each other to form a ring.
According to an embodiment of the present invention, in the device, wherein the phosphorescent light emitting material is a metal complex having M (L) a ) m (L b ) n A general formula (II) of (I);
m is selected from metals having a relative atomic mass greater than 40;
L a 、L b a first ligand and a second ligand coordinated to said M, respectively; l is a radical of an alcohol a 、L b Optionally linked to form a multidentate ligand;
m is 1,2 or 3; n is 0, 1 or 2; q is 0 or 1; the sum of M, n, q is equal to the oxidation state of said M; when m is 2 or more, a plurality of L a May be the same or different; when n is 2, two L b May be the same or different;
L a has a structure as shown in formula 3:
wherein,
ring D is selected from a 5-membered heteroaromatic ring or a 6-membered heteroaromatic ring;
ring E is selected from a 5-membered unsaturated carbocyclic ring, a benzene ring, a 5-membered heteroaromatic ring or a 6-membered heteroaromatic ring;
ring D and ring E via U a And U b Fusing;
U a and U b Selected from C or N, identically or differently at each occurrence;
R d ，R e the same or different at each occurrence denotes mono-, poly-or unsubstituted;
V 1 -V 4 is selected, identically or differently on each occurrence, from CR v Or N;
R d ，R e ，R v each occurrence, identically or differently, is selected from the group consisting of: hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;
adjacent substituents R d ，R e ，R v Can be optionally connected to form a ring;
wherein said ligand L b Has the following structure:
wherein R is 1 To R 7 Each independently selected from the group consisting of: hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, an ester group, an isocarbonyl group, a cyano group, a sulfonyl group, a cyano group, and combinations thereof.
According to one embodiment of the invention, in the device, wherein the ligand L b Has the following structure:
wherein R is 1 -R 3 At least one or two of which are selected from the group consisting of substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 1 to 20 carbon atoms, or combinations thereof; and/or R 4 -R 6 Wherein at least one or two are selected from substituted or unsubstituted alkyl groups having 1 to 20 carbon atomsSubstituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, or combinations thereof.
According to one embodiment of the invention, in the device, wherein the ligand L b Has the following structure:
wherein R is 1 -R 3 At least two of which, identically or differently on each occurrence, are selected from substituted or unsubstituted alkyl groups having 2 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 2 to 20 carbon atoms, or combinations thereof; and/or R 4 -R 6 At least two of which, identically or differently on each occurrence, are selected from substituted or unsubstituted alkyl groups having 2 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 2 to 20 carbon atoms, or combinations thereof.
According to an embodiment of the present invention, in the device, wherein the phosphorescent light-emitting material is an Ir complex, a Pt complex, or an Os complex.
According to an embodiment of the present invention, the device, wherein the phosphorescent light emitting material is an Ir complex and has Ir (L) a )(L b )(L c )、Ir(L a ) 2 (L b )、Ir(L a ) 2 (L c ) Or Ir (L) a )(L c ) 2 Any of the structures shown.
According to one embodiment of the invention, wherein, in the electroluminescent device, the phosphorescent light-emitting material is an Ir complex and contains a ligand L a Said L is a Has a structure as shown in formula 3 and comprises at least one structural unit selected from the group consisting of a 6-membered and 6-membered aromatic ring, a 6-membered and 6-membered heteroaromatic ring, a 6-membered and 5-membered aromatic ring and a 6-membered and 5-membered heteroaromatic ring.
According to an embodiment of the present invention, wherein,in the electroluminescent device, the phosphorescent light-emitting material is an Ir complex and contains a ligand L a Said L is a Has a structure as shown in formula 3 and comprises at least one structural unit selected from the group consisting of naphthalene, phenanthrene, quinoline, isoquinoline and azaphenanthrene.
According to one embodiment of the invention, wherein, in the electroluminescent device, the phosphorescent light-emitting material is an Ir complex and contains a ligand L a Said L is a Any one at each occurrence selected from the group consisting of:
according to one embodiment of the invention, wherein, in the electroluminescent device, the phosphorescent light-emitting material is an Ir complex and contains a ligand L b Said L is b Each occurrence, the same or different, is selected from the group consisting of:
according to an embodiment of the invention, wherein, in the electroluminescent device, the phosphorescent light emitting material is selected from the group consisting of:
according to one embodiment of the present invention, wherein the light emitting layer further comprises at least one host material, and the at least one host material has H 1 -L 1 -Ar 1 In which H 1 Has a structure represented by formula 4:
in formula 5, Z 1 -Z 3 、Z 6 -Z 8 Selected from CR, identically or differently at each occurrence z1 Or N, Z 4 And Z 5 Selected from CR, identically or differently at each occurrence z2 And Z is 4 And Z 5 Two substituents R in (1) z2 Are connected to form a ring;
L 1 selected from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof;
Ar 1 selected from substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, or substituted or unsubstituted amino having 0 to 20 carbon atoms;
R z1 each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atomsSubstituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, acyl, carbonyl, carboxylic acid group, ester group, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof;
R z2 each occurrence, the same or different, is selected from the group consisting of: hydrogen, substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl groups having 3 to 20 ring atoms, substituted or unsubstituted aralkyl groups having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy groups having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy groups having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl groups having 2 to 20 carbon atoms, substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl groups having 6 to 20 carbon atoms, substituted or unsubstituted amino groups having 0 to 20 carbon atoms, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, hydroxyl groups, sulfinyl groups, sulfonyl groups, thiol groups, phosphine groups, and combinations thereof;
adjacent substituents R z1 ，R z2 Can optionally be joined to form a ring.
In the present embodiment, "+" indicates the H 1 In the structure of (1) and the L 1 The location of the connection.
In this example, the adjacent substituents R z1 ，R z2 Can optionally be linked to form a ring, intended to indicate groups of adjacent substituents therein, e.g. Z 1 -Z 3 In (B) an adjacent substituent R z1 Z is 6 -Z 8 In (B) an adjacent substituent R z1 Z is 3 Substituent R in (1) z1 And Z 4 Substituent R in (1) z2 Z is 3 Substituent R in (1) z1 And Z 5 Substituent R in (1) z2 Z is 6 Substituent R in (1) z1 And Z 4 Substituent R in (1) z2 And Z is 6 Substituent R in (1) z1 And Z 5 Substituent R in (1) z2 And any one or more of these substituent groups can be linked to form a ring. Obviously, these adjacent substituent groups may not be connected to form a ring.
According to an embodiment of the present invention, wherein, in the formula 4, the Z 4 And Z 5 Two substituents R in (1) z2 The linkage forms a ring, and the ring has at least 6 ring atoms.
According to an embodiment of the present invention, wherein, in the formula 4, the Z 4 And Z 5 Two substituents R in (1) z2 The linkage forms a ring, and the ring has at least 7 ring atoms.
According to an embodiment of the invention, wherein the at least one host material has H 1 -L 1 -Ar 1 Structure of (1), wherein H 1 Has a structure represented by any one of formulas 4-1 to 4-8:
in formulae 4-1 to 4-8, Z 1 -Z 3 、Z 6 -Z 8 Selected from CR, identically or differently at each occurrence z1 Or N, Z h1 -Z h8 Selected from CR, identically or differently at each occurrence zh Or N, Z m Selected from the group consisting of CR zm Or N, Z n Selected from the group consisting of CR zn R zn O, S or NR zn ；
L 1 Selected from single bonds, substituted or unsubstituted alkylene groups having 1 to 20 carbon atomsA substituted or unsubstituted cycloalkylene group having 3-20 carbon atoms, a substituted or unsubstituted arylene group having 6-20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3-20 carbon atoms, or a combination thereof;
Ar 1 selected from substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, or substituted or unsubstituted amino having 0 to 20 carbon atoms;
R z1 、R zh 、R zm 、R zn each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, a carbonyl group, an ester group, a cyano group, an isonicoyl group, a hydroxyl group, a mercapto group, a sulfonyl group, a mercapto group, and combinations thereof;
adjacent substituents R z1 、R zh 、R zm 、R zn Can optionally be linked to form a ring.
In this example, the adjacent substituents R z1 、R zh 、R zm 、R zn Can optionally be linked to form a ring, intended to indicate an adjacent substituent group therein, e.g. Z 1 -Z 3 In (B) an adjacent substituent R z1 Z is 6 -Z 8 In (C) adjacent substituent R z1 Between, adjacent substituents R zh Between, adjacent substituents R zh And R zm Between, adjacent substituents R zn And, adjacent substituents R zh And R zn And any one or more of these substituent groups can be linked to form a ring. Obviously, these adjacent substituent groups may not be connected to form a ring.
According to another embodiment of the present invention, there is also disclosed a composition comprising the compound represented by formula 1. The specific structure of the compound is shown in any one of the embodiments.
In combination with other materials
The materials described herein for a particular layer in an organic light emitting device can be used in combination with various other materials present in the device. Combinations of these materials are described in detail in U.S. patent application US2016/0359122A1, paragraphs 0132-0161, the entire contents of which are incorporated herein by reference. The materials described or referenced therein are non-limiting examples of materials that may be used in combination with the compounds disclosed herein, and one skilled in the art can readily review the literature to identify other materials that may be used in combination.
Materials described herein as being useful for particular layers in an organic light emitting device can be used in combination with a variety of other materials present in the device. For example, the compounds disclosed herein may be used in conjunction with a variety of light emitting dopants, hosts, transport layers, barrier layers, injection layers, electrodes, and other layers that may be present. Combinations of these materials are described in detail in U.S. patent application US2015/0349273A1, paragraphs 0080-0101, the entire contents of which are incorporated herein by reference. The materials described or referenced therein are non-limiting examples of materials that can be used in combination with the compounds disclosed herein, and one skilled in the art can readily review the literature to identify other materials that can be used in combination.
In the examples of material synthesis, all reactions were carried out under nitrogen unless otherwise stated. All reaction solvents were anhydrous and used as received from commercial sources. The synthesis product is subjected to structural confirmation and characterization using one or more equipment conventional in the art (including, but not limited to, bruker's nuclear magnetic resonance apparatus, shimadzu's liquid chromatograph-mass spectrometer, gas chromatograph-mass spectrometer, differential scanning calorimeter, shanghai prism-based fluorescence spectrophotometer, wuhan Corset's electrochemical workstation, anhui Bei Yi g sublimator, etc.) in a manner well known to those skilled in the art. In an embodiment of the device, the device characteristics are also tested using equipment conventional in the art (including, but not limited to, an evaporator manufactured by Angstrom Engineering, an optical test system manufactured by Fushida, suzhou, an ellipsometer manufactured by Beijing Mass., etc.) in a manner well known to those skilled in the art. Since the relevant contents of the above-mentioned device usage, testing method, etc. are known to those skilled in the art, the inherent data of the sample can be obtained with certainty and without being affected, and therefore, the relevant contents are not described in detail in this patent.
Materials synthesis example:
the preparation method of the compound of the present invention is not limited, and the following compounds are typically but not limited to, and the synthetic route and the preparation method thereof are as follows:
synthesis example 1: synthesis of Compound 6
Step 1: synthesis of intermediate 2
Under nitrogen protection, intermediate 1 (30g, 93.5 mmol), o-bromobenzoic acid (22.5g, 112.2mmol), tetratriphenylphosphine palladium (3.2g, 2.8mmol), potassium carbonate (25.8g, 187mmol), and a solvent (toluene/ethanol/water =280/70/70 mL) were charged into a three-necked flask and reacted overnight at 80 ℃. After completion of the reaction, it was cooled to room temperature, distilled water was added, the mixture was extracted with dichloromethane, the organic phase was washed with water, the solvent was removed under reduced pressure, and the crude product was purified by column chromatography (eluent: PE) to give intermediate 2 as a yellow solid (2.8 g, yield: 72%).
Step 2: synthesis of intermediate 3
Under nitrogen protection, intermediate 2 (22g, 93.5 mmol), triphenylphosphine (52.7g, 201.3mmol) and o-dichlorobenzene (150 mL) were added to a three-necked flask and reacted at 200 ℃ overnight. After completion of the reaction, it was cooled to room temperature, and the crude product was purified by column chromatography (eluent: PE/DCM = 2/1) to give intermediate 3 as a white solid (18 g, yield: 65%).
And step 3: synthesis of intermediate 4
Under the protection of nitrogen, the intermediate 3 (7g, 23.6mmol), iodobenzene (5.8g, 28.3mmol), cuprous chloride (237.6mg, 2.4mmol), potassium carbonate (9.8g, 70.8mmol), 18-crown-6 (633.6mg, 2.4mmol), 1,10-phenanthroline (432mg, 2.4mmol) and N-methylpyrrolidone (NMP, 80 mL) are added into a three-port bottle and reacted at 180 ℃ overnight. Cooled to room temperature, distilled water was added, the mixture was extracted with dichloromethane, the organic phase was washed with water, the organic phase was dried over anhydrous sodium sulfate and concentrated to remove the solvent, and purified by column chromatography (eluent: PE/EA = 20) to give intermediate 4 as an off-white solid (6 g, yield: 68%).
And 4, step 4: synthesis of intermediate 5
Intermediate 4 (5.8 g,15.5 mmol) was dissolved in dry tetrahydrofuran (50 mL) under a nitrogen blanket and then slowly added dropwise with n-butyllithium (7.4 mL,18.6 mmol) at-78 deg.C under these conditions for 1 hour. Triisopropyl borate (5.7 g,30.1 mmol) was then added dropwise slowly at-78 ℃ and after completion of the addition, the reaction was allowed to warm to room temperature slowly overnight. After completion of the reaction, water was slowly added dropwise to quench, the mixture was extracted with dichloromethane, the organic phase was washed with water, the organic phase was dried over anhydrous sodium sulfate and concentrated to remove the solvent, and purified by column chromatography (eluent: PE/EA = 10) to give intermediate 5 as a gray solid (5.5 g, yield: 85%).
And 5: synthesis of Compound 6
Intermediate 5 (3g, 7.1mmol), 2-chloro-4- (dibenzofuran-1-yl) -6-phenyl- [1,3,5] triazine (2.8g, 7.8mmol), tetratriphenylphosphine palladium (410mg, 0.36mmol), potassium carbonate (2.0g, 14.2mmol), solvent (toluene/ethanol/water =40/10/10 mL) were charged in a three-necked flask under nitrogen atmosphere and reacted overnight at 100 ℃. After completion of the reaction, it was cooled to room temperature, distilled water was added, the mixture was extracted with dichloromethane, the organic phase was washed with water, concentrated to remove the solvent, and the crude product was purified by column chromatography (eluent: PE/DCM = 4:1) to obtain compound 6 as a yellow solid (2.7 g, yield: 63%). The product was identified as the target product, molecular weight 614.2.
Synthetic example 2: synthesis of Compound 7
Intermediate 5 (3g, 7.1 mmol), intermediate 6 (3.4g, 7.8mmol), tetratriphenylphosphine palladium (410mg, 0.36mmol), potassium carbonate (2.0g, 14.2mmol), and a solvent (toluene/ethanol/water =40/10/10 mL) were charged into a three-necked flask under nitrogen protection, and reacted at 100 ℃ overnight. After completion of the reaction, it was cooled to room temperature, distilled water was added, the mixture was extracted with dichloromethane, the organic phase was washed with water, concentrated to remove the solvent, and the crude product was purified by column chromatography (eluent: PE/DCM = 4:1) to obtain compound 7 as a yellow solid (2.4 g, yield: 63%). The product was identified as the target product, molecular weight 690.2.
It will be appreciated by those skilled in the art that the above preparation method is only an illustrative example, and that those skilled in the art will be able to modify it to obtain other compound structures of the present invention.
Device example 1
First, a glass substrate, having an 80nm thick Indium Tin Oxide (ITO) anode, was cleaned and then treated with UV ozone and oxygen plasma. After the treatment, the substrate was dried in a glove box filled with nitrogen gas to remove moisture, and then the substrate was mounted on a substrate holder and loaded into a vacuum chamber. The organic layer specified below was in a vacuum of about 10 degrees -8 In the case of Torr
The rate of (a) was successively evaporated on the ITO anode by thermal vacuum. Compound HI is used as hole-injecting layer (HIL) in a thickness of->
Compound HT is used as Hole Transport Layer (HTL) in a thickness of->
Compound EB as an Electron Blocking Layer (EBL) with a thickness of->
Then, the compound 6 of the present invention as a host and the compound RD as a dopant are co-evaporated to be used as a light-emitting layer (EML) in a thickness of ^ H>
Use of a Compound HB as hole-blocking layer (HBL) in a thickness of >>
On the hole-blocking layer, compound ET and 8-hydroxyquinoline-lithium (Liq) were co-evaporated as an electron-transporting layer (ETL) with a thickness ^ H>
Finally, evaporating and plating>
8-hydroxyquinoline-lithium (Liq) in thickness as Electron Injection Layer (EIL) and evaporated for ion plating>
As a cathode. The device was then transferred back to the glove box and encapsulated with a glass lid to complete the device.
Device comparative example 1
Device comparative example 1 was the same as device example 1 except that compound a was used as a host in place of compound 6 of the present invention in the light emitting layer (EML).
The detailed device layer structure and thickness are shown in the table below. Wherein more than one layer of the materials used is obtained by doping different compounds in the stated weight ratios.
TABLE 1 device structures of device examples and comparative examples
The material structure used in the device is as follows:
table 2 shows the current at a constant current of 15mA/cm 2 Maximum emission wavelength (λ) of device examples and device comparative examples measured under the conditions max ) Current Efficiency (CE) and External Quantum Efficiency (EQE).
TABLE 2 device data
| Device ID | λ max (nm) | CE[cd/A] | EQE[％] |
| Example 1 | 623 | 19.3 | 21.6 |
| Comparative example 1 | 624 | 17.9 | 20.3 |
Discussion:
as can be seen from the data in Table 2, the maximum emission wavelengths of example 1 and comparative example 1 remained substantially the same; in the aspect of current efficiency, compared with comparative example 1, the current efficiency of the preparation method is improved by 1.4cd/A, and the amplification is 7.8%; in terms of external quantum efficiency, example 1 was improved by 1.3% and the amplification was 6.4% as compared with comparative example 1. From the above data, it can be seen that the steric hindrance of the compound of the present invention is larger compared to the compound a after modification at a specific position of benzocarbazole, so that the planarity of molecules is reduced, and pi-pi stacking between molecules is reduced, and such difference in structure makes the compound of the present invention have higher device efficiency. The more excellent properties of the compounds of the present invention are demonstrated.
Device example 2
Device example 2 was carried out in the same manner as in device example 1 except that the compound 6 of the present invention and the compound B (the weight ratio of the compound 6 to the compound B was 49%: 49%) were used as the main components in place of the compound 6 of the present invention in the light-emitting layer (EML).
Device example 3
Device example 3 was carried out in the same manner as in device example 2 except that the compound 7 of the present invention was used in place of the compound 6 of the present invention in the light-emitting layer (EML).
Device comparative example 2
Device comparative example 2 was the same as device example 2 except that compound a was used in the light emitting layer (EML) instead of compound 6 of the present invention.
The detailed device layer structure and thickness are shown in the table below. Wherein more than one layer of the materials used is obtained by doping different compounds in the stated weight ratios.
TABLE 3 partial device structures of device examples and comparative examples
The structure of the material used in the device is as follows:
table 4 shows the results at a constant current of 15mA/cm 2 Maximum emission wavelength (λ) of device examples and device comparative examples measured under the conditions max ) Current Efficiency (CE) and External Quantum Efficiency (EQE).
TABLE 4 device data
| Device ID | λ max (nm) | CE[cd/A] | EQE[％] |
| Example 2 | 624 | 20.3 | 23.3 |
| Example 3 | 624 | 20.0 | 22.9 |
| Comparative example 2 | 624 | 19.1 | 21.8 |
Discussion:
as can be seen from the data in table 4, the maximum emission wavelengths of examples 2,3 and comparative example 2 remain consistent; in the aspect of current efficiency, the current efficiency of the embodiment 2 and the embodiment 3 is respectively improved by 6.3 percent and 4.7 percent compared with the comparative example 2; in terms of external quantum efficiency, the external quantum efficiency of the embodiments 2 and 3 is respectively improved by 6.5 percent and 5.1 percent compared with that of the comparative example 2. The comparison shows that the compound of the invention still has higher device efficiency in a multi-body system, and the compound of the invention has more excellent performance.
It should be understood that the various embodiments described herein are illustrative only and are not intended to limit the scope of the invention. Thus, the invention as claimed may include variations from the specific embodiments and preferred embodiments described herein, as will be apparent to those skilled in the art. Many of the materials and structures described herein may be substituted with other materials and structures without departing from the spirit of the present invention. It should be understood that various theories as to why the invention works are not intended to be limiting.
Claims (14)
1. A compound having a structure represented by formula 1:
wherein Ar is selected from substituted or unsubstituted aryl groups having 6 to 12 carbon atoms;
X 1 to X 9 Is selected, identically or differently on each occurrence, from N or CR x ，
X 10 To X 14 Selected, identically or differently on each occurrence, from N or CR, and X 10 To X 14 At least one of which is N;
l is the same or different at each occurrence and is selected from the group consisting of a single bond and a substituted or unsubstituted arylene group having 6 to 30 carbon atoms;
R，R x each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl having 6 to 20 carbon atoms, acyl, carbonyl, carboxylic acid group, ester group, cyano group, isocyano group, hydroxyl group, mercapto group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof；
Adjacent substituents R, R x Can optionally be linked to form a ring.
2. The compound of claim 1, wherein X 1 To X 9 Selected from CR, identically or differently at each occurrence x 。
3. The compound of claim 1 or 2, wherein R is x Each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, substituted or unsubstituted alkenyl groups having 2 to 20 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl groups having 6 to 20 carbon atoms, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, and combinations thereof;
adjacent substituents R x Can optionally be linked to form a ring.
4. The compound of claim 1 or 2, wherein the compound has a structure represented by one of formula 1-a to formula 1-g:
wherein Ar is selected from substituted or unsubstituted aryl groups having 6 to 12 carbon atoms; x 10 To X 14 Selected, identically or differently on each occurrence, from N or CR, and X 10 To X 14 At least one of which is N;
l is the same or different at each occurrence and is selected from the group consisting of: a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms;
R x1 in each occurrence identically or differently, represents a single substitution, moreSubstituted or unsubstituted;
R，R x1 each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermyl group having 6 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, and combinations thereof;
adjacent substituents R, R x1 Can optionally be linked to form a ring.
5. The compound of claim 4, wherein R is x1 Each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3 to 20 ring atoms, substituted or unsubstituted aralkyl groups having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy groups having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy groups having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl groups having 2 to 20 carbon atoms, substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, and combinations thereof;
adjacent substituents R x1 Can optionally be linked to form a ring;
preferably, said R is x1 Each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, fluorine, cyano, methyl, ethyl, tert-butyl, phenyl, biphenyl, triphenylene, naphthyl, dibenzothienyl, dibenzofuranyl, fluorenyl, pyridyl, and combinations thereof.
6. The compound of any one of claims 1-5, wherein X 10 To X 14 Three of N;
preferably, X 10 、X 12 And X 14 Is N.
7. The compound of any one of claims 1-6, wherein R, identically or differently at each occurrence, is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, cyano, isocyano, hydroxy, mercapto, and combinations thereof;
adjacent substituents R can optionally be linked to form a ring;
preferably, at least one of said R groups, which is the same or different on each occurrence, is selected from deuterium, halogen, cyano, substituted or unsubstituted aryl having 6 to 30 carbon atoms, or substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms;
more preferably, at least one of said R, taken on each occurrence, is selected, identically or differently, from deuterium, fluoro, cyano, phenyl, biphenyl, triphenylene, naphthyl, dibenzothienyl, dibenzofuranyl, fluorenyl, pyridyl, and combinations thereof.
8. The compound of any one of claims 1-7, wherein Ar is selected from the group consisting of structures represented by one of formulas 2-a through 2-f:
wherein Y is selected from CR, the same or different at each occurrence y ；
R y Each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, an isocyanide group, a cyano group, and combinations thereof;
preferably, said R is y Each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, and combinations thereof;
more preferably, ar is phenyl, biphenyl or naphthyl.
9. The compound of claim 1, wherein said L, identically or differently at each occurrence, is selected from a single bond or a substituted or unsubstituted arylene group having 6 to 24 carbon atoms;
preferably, said L is selected, identically or differently at each occurrence, from the group consisting of: a single bond, phenylene, naphthylene, biphenylene, terphenylene, triphenylene;
more preferably, said L is selected, identically or differently on each occurrence, from the group consisting of:
wherein, optionally, the hydrogen in said L-1 to L-8 can be partially or fully substituted with deuterium.
10. The compound of claim 1, wherein the compound is selected from the group consisting of the following structures:
wherein, optionally, the hydrogen in said compounds 1 to 288 can be partially or fully substituted with deuterium.
11. An electroluminescent device, comprising:
an anode, a cathode, a anode and a cathode,
a cathode electrode, which is provided with a cathode,
and an organic layer disposed between the anode and the cathode; wherein the organic layer comprises a compound of any one of claims 1-10.
12. The device of claim 11, wherein the organic layer is a light emitting layer and the compound is a host material in the electroluminescent device.
13. The device of claim 12, wherein the light emitting layer further comprises at least one phosphorescent light emitting material;
preferably, the phosphorescent light-emitting material is a metal complex and has M (L) a ) m (L b ) n (L c ) q A general formula (II) of (I);
wherein M is selected from metals having a relative atomic mass greater than 40;
L a 、L b 、L c a first ligand, a second ligand and a third ligand which are respectively coordinated with the M; l is a 、L b 、L c Optionally linked to form a multidentate ligand;
L a 、L b 、L c may be the same or different; m is 1,2 or 3; n is 0, 1 or 2; q is 0 or 1; the sum of M, n, q is equal to the oxidation state of said M; when m is 2 or more, a plurality of L a May be the same or different; when n is 2, two L b May be the same or different;
L a has a structure as shown in formula 3:
wherein,
ring D is selected from a 5-membered heteroaromatic ring or a 6-membered heteroaromatic ring;
ring E is selected from a 5-membered unsaturated carbocyclic ring, a benzene ring, a 5-membered heteroaromatic ring or a 6-membered heteroaromatic ring;
ring D and ring E via U a And U b (ii) fused;
U a and U b Selected from C or N, identically or differently at each occurrence;
R d ，R e the same or different at each occurrence denotes mono-, poly-or unsubstituted;
V 1 -V 4 selected from CR, identically or differently at each occurrence v Or N;
R d ，R e ，R v each occurrence, identically or differently, is selected from the group consisting of: hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, a hydroxyl group, a mercapto group, and combinations thereof;
adjacent substituents R d ，R e ，R v Can be optionally linked to form a ring;
L b 、L c each occurrence, identically or differently, is selected from any one of the following structures:
wherein,
R a ，R b and R c The same or different at each occurrence indicates mono-, poly-, or no substitution;
X b each occurrence, the same or different, is selected from the group consisting of: o, S, se, NR N1 And CR C1 R C2 ；
X c And X d Each occurrence, identically or differently, is selected from the group consisting of: o, S, se and NR N2 ；
R a ，R b ，R c ，R N1 ，R N2 ，R C1 And R C2 Each occurrence, the same or different, is selected from the group consisting of: hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, a hydroxyl group, a mercapto group, and combinations thereof;
the ligand L b 、L c In the structure (1), adjacent substituents R a ，R b ，R c ，R N1 ，R N2 ，R C1 And R C2 Can optionally be linked to form a ring.
14. A composition comprising a compound of any one of claims 1-10.
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