WO2019027040A1 - 化合物、有機エレクトロルミネッセンス素子用材料、有機エレクトロルミネッセンス素子、及び電子機器 - Google Patents
化合物、有機エレクトロルミネッセンス素子用材料、有機エレクトロルミネッセンス素子、及び電子機器 Download PDFInfo
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- WO2019027040A1 WO2019027040A1 PCT/JP2018/029217 JP2018029217W WO2019027040A1 WO 2019027040 A1 WO2019027040 A1 WO 2019027040A1 JP 2018029217 W JP2018029217 W JP 2018029217W WO 2019027040 A1 WO2019027040 A1 WO 2019027040A1
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- 239000000463 material Substances 0.000 title description 72
- 239000010410 layer Substances 0.000 claims description 348
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- 125000004432 carbon atom Chemical group C* 0.000 claims description 117
- 230000005525 hole transport Effects 0.000 claims description 85
- 125000006413 ring segment Chemical group 0.000 claims description 44
- 125000001072 heteroaryl group Chemical group 0.000 claims description 40
- 125000003118 aryl group Chemical group 0.000 claims description 39
- 125000004429 atom Chemical group 0.000 claims description 35
- 229910052799 carbon Inorganic materials 0.000 claims description 34
- 125000000217 alkyl group Chemical group 0.000 claims description 28
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 27
- 150000001721 carbon Chemical group 0.000 claims description 25
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 23
- 125000000732 arylene group Chemical group 0.000 claims description 23
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- 125000001424 substituent group Chemical group 0.000 claims description 21
- TXCDCPKCNAJMEE-UHFFFAOYSA-N dibenzofuran Chemical compound C1=CC=C2C3=CC=CC=C3OC2=C1 TXCDCPKCNAJMEE-UHFFFAOYSA-N 0.000 claims description 19
- IYYZUPMFVPLQIF-UHFFFAOYSA-N dibenzothiophene Chemical compound C1=CC=C2C3=CC=CC=C3SC2=C1 IYYZUPMFVPLQIF-UHFFFAOYSA-N 0.000 claims description 18
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 18
- 229910052717 sulfur Inorganic materials 0.000 claims description 17
- FCEHBMOGCRZNNI-UHFFFAOYSA-N 1-benzothiophene Chemical compound C1=CC=C2SC=CC2=C1 FCEHBMOGCRZNNI-UHFFFAOYSA-N 0.000 claims description 16
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- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 claims description 12
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- MYKQKWIPLZEVOW-UHFFFAOYSA-N 11h-benzo[a]carbazole Chemical compound C1=CC2=CC=CC=C2C2=C1C1=CC=CC=C1N2 MYKQKWIPLZEVOW-UHFFFAOYSA-N 0.000 claims description 9
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- PCNDJXKNXGMECE-UHFFFAOYSA-N Phenazine Natural products C1=CC=CC2=NC3=CC=CC=C3N=C21 PCNDJXKNXGMECE-UHFFFAOYSA-N 0.000 claims description 8
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- CZPWVGJYEJSRLH-UHFFFAOYSA-N Pyrimidine Chemical compound C1=CN=CN=C1 CZPWVGJYEJSRLH-UHFFFAOYSA-N 0.000 claims description 8
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- AWJUIBRHMBBTKR-UHFFFAOYSA-N isoquinoline Chemical compound C1=NC=CC2=CC=CC=C21 AWJUIBRHMBBTKR-UHFFFAOYSA-N 0.000 claims description 8
- 125000004957 naphthylene group Chemical group 0.000 claims description 8
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 8
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- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 claims description 7
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- QDLAGTHXVHQKRE-UHFFFAOYSA-N lichenxanthone Natural products COC1=CC(O)=C2C(=O)C3=C(C)C=C(OC)C=C3OC2=C1 QDLAGTHXVHQKRE-UHFFFAOYSA-N 0.000 claims description 7
- FYSWUOGCANSBCW-UHFFFAOYSA-N naphtho[1,2-g][1]benzothiole Chemical compound C1=CC=C2C3=CC=C4C=CSC4=C3C=CC2=C1 FYSWUOGCANSBCW-UHFFFAOYSA-N 0.000 claims description 7
- GJCOSYZMQJWQCA-UHFFFAOYSA-N 9H-xanthene Chemical compound C1=CC=C2CC3=CC=CC=C3OC2=C1 GJCOSYZMQJWQCA-UHFFFAOYSA-N 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 claims description 6
- 125000002541 furyl group Chemical group 0.000 claims description 6
- YTIFDAAZLZVHIX-UHFFFAOYSA-N naphtho[1,2-g][1]benzofuran Chemical compound C1=CC=C2C3=CC=C4C=COC4=C3C=CC2=C1 YTIFDAAZLZVHIX-UHFFFAOYSA-N 0.000 claims description 6
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 6
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- JWVCLYRUEFBMGU-UHFFFAOYSA-N quinazoline Chemical compound N1=CN=CC2=CC=CC=C21 JWVCLYRUEFBMGU-UHFFFAOYSA-N 0.000 claims description 6
- 229930192474 thiophene Natural products 0.000 claims description 6
- 125000003960 triphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C3=CC=CC=C3C12)* 0.000 claims description 6
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- VHMICKWLTGFITH-UHFFFAOYSA-N 2H-isoindole Chemical compound C1=CC=CC2=CNC=C21 VHMICKWLTGFITH-UHFFFAOYSA-N 0.000 claims description 5
- WTKZEGDFNFYCGP-UHFFFAOYSA-N Pyrazole Chemical compound C=1C=NNC=1 WTKZEGDFNFYCGP-UHFFFAOYSA-N 0.000 claims description 5
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- QQNLHOMPVNTETJ-UHFFFAOYSA-N spiro[fluorene-9,9'-xanthene] Chemical compound C12=CC=CC=C2OC2=CC=CC=C2C11C2=CC=CC=C2C2=CC=CC=C21 QQNLHOMPVNTETJ-UHFFFAOYSA-N 0.000 claims description 5
- 125000003107 substituted aryl group Chemical group 0.000 claims description 5
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- CSNIZNHTOVFARY-UHFFFAOYSA-N 1,2-benzothiazole Chemical compound C1=CC=C2C=NSC2=C1 CSNIZNHTOVFARY-UHFFFAOYSA-N 0.000 claims description 4
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- VEPOHXYIFQMVHW-XOZOLZJESA-N 2,3-dihydroxybutanedioic acid (2S,3S)-3,4-dimethyl-2-phenylmorpholine Chemical compound OC(C(O)C(O)=O)C(O)=O.C[C@H]1[C@@H](OCCN1C)c1ccccc1 VEPOHXYIFQMVHW-XOZOLZJESA-N 0.000 claims description 4
- GDRVFDDBLLKWRI-UHFFFAOYSA-N 4H-quinolizine Chemical compound C1=CC=CN2CC=CC=C21 GDRVFDDBLLKWRI-UHFFFAOYSA-N 0.000 claims description 4
- ZCQWOFVYLHDMMC-UHFFFAOYSA-N Oxazole Chemical compound C1=COC=N1 ZCQWOFVYLHDMMC-UHFFFAOYSA-N 0.000 claims description 4
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- WCZVZNOTHYJIEI-UHFFFAOYSA-N cinnoline Chemical compound N1=NC=CC2=CC=CC=C21 WCZVZNOTHYJIEI-UHFFFAOYSA-N 0.000 claims description 4
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- BBNZOXKLBAWRSH-UHFFFAOYSA-N n,9-diphenyl-n-[4-(10-phenylanthracen-9-yl)phenyl]carbazol-3-amine Chemical compound C1=CC=CC=C1N(C=1C=C2C3=CC=CC=C3N(C=3C=CC=CC=3)C2=CC=1)C1=CC=C(C=2C3=CC=CC=C3C(C=3C=CC=CC=3)=C3C=CC=CC3=2)C=C1 BBNZOXKLBAWRSH-UHFFFAOYSA-N 0.000 description 1
- XAWQWMLNBYNXJX-UHFFFAOYSA-N n,n-diphenyl-9-[4-(10-phenylanthracen-9-yl)phenyl]carbazol-3-amine Chemical compound C1=CC=CC=C1N(C=1C=C2C3=CC=CC=C3N(C=3C=CC(=CC=3)C=3C4=CC=CC=C4C(C=4C=CC=CC=4)=C4C=CC=CC4=3)C2=CC=1)C1=CC=CC=C1 XAWQWMLNBYNXJX-UHFFFAOYSA-N 0.000 description 1
- CRWAGLGPZJUQQK-UHFFFAOYSA-N n-(4-carbazol-9-ylphenyl)-4-[2-[4-(n-(4-carbazol-9-ylphenyl)anilino)phenyl]ethenyl]-n-phenylaniline Chemical compound C=1C=C(N(C=2C=CC=CC=2)C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=CC=1C=CC(C=C1)=CC=C1N(C=1C=CC(=CC=1)N1C2=CC=CC=C2C2=CC=CC=C21)C1=CC=CC=C1 CRWAGLGPZJUQQK-UHFFFAOYSA-N 0.000 description 1
- AJNJGJDDJIBTBP-UHFFFAOYSA-N n-(9,10-diphenylanthracen-2-yl)-n,9-diphenylcarbazol-3-amine Chemical compound C1=CC=CC=C1N(C=1C=C2C(C=3C=CC=CC=3)=C3C=CC=CC3=C(C=3C=CC=CC=3)C2=CC=1)C1=CC=C(N(C=2C=CC=CC=2)C=2C3=CC=CC=2)C3=C1 AJNJGJDDJIBTBP-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- 150000004866 oxadiazoles Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- PVADDRMAFCOOPC-UHFFFAOYSA-N oxogermanium Chemical compound [Ge]=O PVADDRMAFCOOPC-UHFFFAOYSA-N 0.000 description 1
- DYIZHKNUQPHNJY-UHFFFAOYSA-N oxorhenium Chemical compound [Re]=O DYIZHKNUQPHNJY-UHFFFAOYSA-N 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- CUBIJGNGGJBNOC-UHFFFAOYSA-N palladium;tris(2-methylphenyl)phosphane Chemical compound [Pd].CC1=CC=CC=C1P(C=1C(=CC=CC=1)C)C1=CC=CC=C1C.CC1=CC=CC=C1P(C=1C(=CC=CC=1)C)C1=CC=CC=C1C CUBIJGNGGJBNOC-UHFFFAOYSA-N 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- XDJOIMJURHQYDW-UHFFFAOYSA-N phenalene Chemical compound C1=CC(CC=C2)=C3C2=CC=CC3=C1 XDJOIMJURHQYDW-UHFFFAOYSA-N 0.000 description 1
- ZEAWSFHWVLOENK-UHFFFAOYSA-N phenanthren-2-amine Chemical compound C1=CC=C2C3=CC=C(N)C=C3C=CC2=C1 ZEAWSFHWVLOENK-UHFFFAOYSA-N 0.000 description 1
- 150000002987 phenanthrenes Chemical class 0.000 description 1
- 125000004344 phenylpropyl group Chemical group 0.000 description 1
- SIOXPEMLGUPBBT-UHFFFAOYSA-M picolinate Chemical compound [O-]C(=O)C1=CC=CC=N1 SIOXPEMLGUPBBT-UHFFFAOYSA-M 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- VLRICFVOGGIMKK-UHFFFAOYSA-N pyrazol-1-yloxyboronic acid Chemical compound OB(O)ON1C=CC=N1 VLRICFVOGGIMKK-UHFFFAOYSA-N 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 229910003449 rhenium oxide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910001923 silver oxide Inorganic materials 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical class O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
- 125000006836 terphenylene group Chemical group 0.000 description 1
- ATUZIBCVGFMANZ-UHFFFAOYSA-N tert-butyl-cyclohexyl-fluorophosphane Chemical compound CC(C)(C)P(F)C1CCCCC1 ATUZIBCVGFMANZ-UHFFFAOYSA-N 0.000 description 1
- 150000003518 tetracenes Chemical class 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- GLQWRXYOTXRDNH-UHFFFAOYSA-N thiophen-2-amine Chemical compound NC1=CC=CS1 GLQWRXYOTXRDNH-UHFFFAOYSA-N 0.000 description 1
- DKGYESBFCGKOJC-UHFFFAOYSA-N thiophen-3-amine Chemical compound NC=1C=CSC=1 DKGYESBFCGKOJC-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 230000007704 transition Effects 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
- 125000005580 triphenylene group Chemical group 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Images
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
- H10K85/633—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/78—Ring systems having three or more relevant rings
- C07D311/80—Dibenzopyrans; Hydrogenated dibenzopyrans
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/78—Ring systems having three or more relevant rings
- C07D311/80—Dibenzopyrans; Hydrogenated dibenzopyrans
- C07D311/82—Xanthenes
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D335/00—Heterocyclic compounds containing six-membered rings having one sulfur atom as the only ring hetero atom
- C07D335/04—Heterocyclic compounds containing six-membered rings having one sulfur atom as the only ring hetero atom condensed with carbocyclic rings or ring systems
- C07D335/10—Dibenzothiopyrans; Hydrogenated dibenzothiopyrans
- C07D335/12—Thioxanthenes
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- C07D—HETEROCYCLIC COMPOUNDS
- C07D407/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00
- C07D407/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing two hetero rings
- C07D407/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing two hetero rings linked by a chain containing hetero atoms as chain links
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D407/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00
- C07D407/14—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing three or more hetero rings
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
- C07D409/14—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing three or more hetero rings
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
- H10K85/636—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom
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- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
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- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
- H10K85/6574—Polycyclic condensed heteroaromatic hydrocarbons comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes
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- H10K50/15—Hole transporting layers
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- H10K50/14—Carrier transporting layers
- H10K50/15—Hole transporting layers
- H10K50/156—Hole transporting layers comprising a multilayered structure
Definitions
- the present invention relates to a compound, a material for an organic electroluminescent device including the compound, an organic electroluminescent device using the compound, and an electronic device including the organic electroluminescent device.
- an organic electroluminescent element is composed of an anode, a cathode, and an organic layer sandwiched between the anode and the cathode.
- organic EL element When a voltage is applied between the two electrodes, electrons are injected from the cathode side and holes from the anode side into the light emitting area, and the injected electrons and holes recombine in the light emitting area to generate an excited state, which is then excited. It emits light when the state returns to the ground state. Therefore, development of a compound that efficiently transports electrons or holes to the light emitting region and facilitates recombination of electrons and holes is important for obtaining a high efficiency organic EL device.
- Patent Document 1 discloses an amine compound in which a group having a xanthene structure shown below, an aryl group, and a group selected from a heteroaryl group having a structure other than the xanthene structure and an aryl group are bonded to a central nitrogen atom. There is.
- the amine compound is used in each of the hole transport layers of the organic EL device including four hole transport layers in the examples.
- Patent document 2 shows an amine in which a group selected from a group having a xanthene structure in which a benzene ring is condensed shown below, an aryl group, and a heteroaryl group having a structure other than the xanthene structure and an aryl group is bonded to a central nitrogen atom.
- a compound Disclosed is a compound.
- the amine compound is used in the hole transport layer of the organic EL device in the examples.
- Patent Document 3 describes the following diamine compounds and their analogous compounds.
- the compound is used as a host or dopant of the light emitting layer of the organic EL device in the examples.
- Patent Document 4 discloses an amine compound having a spiro (xanthene fluorenyl) group or a spiro (thioxanthene fluorenyl) group, an aryl group, and a group containing a 3-carbazolyl group, for example, the following compounds: There is. However, since the performance of the organic EL device containing this compound is not measured in the examples, the performance of the compound as a material for an organic EL device and the usefulness thereof are unclear from the description of Patent Document 4.
- the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an organic EL element which can be driven at a low voltage and exhibits excellent luminous efficiency, and a novel compound for providing such an organic EL element. I assume.
- the inventors of the present invention conducted intensive studies to achieve the above object, and as a result, at least two skeletons selected from spiro (xanthene fluorene) skeleton and spiro (thioxanthene fluorene) skeleton shown in the following formula (1) It has been found that a monoamine compound bonded directly or via a linker to a central nitrogen atom can be driven at a low voltage and provides an organic EL device exhibiting excellent luminous efficiency.
- the present invention provides a compound represented by the formula (1) (hereinafter sometimes referred to as a compound (1)).
- a compound (1) each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted group A substituted or unsubstituted cycloalkyl group having 3 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms, a substituted or unsubstituted group A substituted or unsubstituted aralkyl group having 7 to 36 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, a substituted or unsubstituted
- R 1 to R 4 Two adjacent selected from R 1 to R 4, Two adjacent selected from R 5 to R 8, Two adjacent selected from R 11 to R 14, adjacent 2 selected from R 15 to R 18 Two, two adjacent selected from R 21 to R 24, two adjacent selected from R 25 to R 28, two adjacent selected from R 31 to R 34, and selected from R 35 to R 38
- the adjacent two may be bonded to each other to form a ring structure.
- R 1 to R 8 and R 11 to R 18 represents a single bond to be bonded to * 1, or two adjacent R 1 to R 4 selected from R 5 to R 8
- the ring-forming atom of the ring structure formed by two adjacent selected, adjacent two selected from R 11 to R 14 , or adjacent two selected from R 15 to R 18 is bonded to * 1;
- One selected from R 21 to R 28 and R 31 to R 38 represents a single bond to be bonded to * 2, or selected from two adjacent R 25 to R 28 selected from R 21 to R 24
- the ring-forming atom of the ring structure formed by two adjacent rings, two adjacent rings selected from R 31 to R 34 , or two adjacent rings selected from R 35 to R 38 is bonded to * 2.
- X represents an oxygen atom or a sulfur atom.
- Y represents an oxygen atom or a sulfur atom.
- L 1 , L 2 and L 3 each independently represent a single bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 5 to 30 ring atoms It is.
- Ar is a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted nitrogen-containing heteroaryl group having 5 to 30 ring atoms, a substituted or unsubstituted ring having 5 to 30 ring atoms It is an oxygen-containing heteroaryl group or a substituted or unsubstituted sulfur-containing heteroaryl group having 5 to 30 ring atoms.
- the optional substituent when referred to as “substituted or unsubstituted” is an alkyl group having 1 to 30 carbon atoms, a cycloalkyl group having 3 to 30 ring carbon atoms, an aryl group having 6 to 30 ring carbon atoms, a ring forming atom A heteroaryl group having 5 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 36 carbon atoms, an alkoxy group having 1 to 30 carbon atoms, an aryloxy group having 6 to 30 ring carbon atoms, an alkyl group having 1 to 30 carbon atoms And a mono-, di- or tri-substituted silyl group having a substituent selected from an aryl group having 6 to 30 ring carbon atoms, a haloalkyl group having 1 to 30 carbon atoms, a haloalkoxy group having 1 to 30 carbon atoms, a halogen atom and
- the present invention provides a material for an organic electroluminescent device, which comprises the compound (1).
- the invention is an organic electroluminescent device comprising a cathode, an anode, and an organic layer disposed between the cathode and the anode, the organic layer comprising a light emitting layer, the organic layer comprising Provided is an organic electroluminescent device, wherein at least one layer comprises the compound (1).
- the present invention provides an electronic device comprising the organic electroluminescent device.
- the compound (1) provides an organic EL device which can be driven at low voltage and has a further improved luminous efficiency.
- carbon number XX to YY of “a substituted or unsubstituted ZZ group having a carbon number of XX to YY” represents the carbon number of the unsubstituted ZZ group, and does not include the carbon number of a substituent.
- number of atoms XX to YY of “substituted or unsubstituted number of atoms XX to YY ZZ group” represents the number of atoms of unsubstituted ZZ group, and does not include the number of atoms of substituents.
- the "unsubstituted ZZ group" of the "substituted or unsubstituted ZZ group” means that the hydrogen atom of the ZZ group is not substituted by a substituent.
- hydroxogen atom includes isotopes that differ in neutron number, ie, light hydrogen (protium), deuterium (deuterium), and tritium (tritium).
- the number of carbon atoms forming a ring means a compound in which atoms are cyclically bonded, for example, a carbon forming the ring itself of a monocyclic compound, a fused ring compound, a crosslinking compound, a carbocyclic compound, and a heterocyclic compound. Represents the number of atoms.
- the carbon atom contained in the substituent is not included in the ring-forming carbon atom.
- number of ring-forming carbon atoms described below, unless otherwise stated.
- the benzene ring has 6 ring carbon atoms
- the naphthalene ring has 10 ring carbon atoms
- the pyridine ring has 5 ring carbon atoms
- the furan ring has 4 ring carbon atoms.
- the carbon atom of the alkyl substituent is not included in the ring-forming carbon atom.
- carbon atoms of the fluorene substituent are not included in the ring-forming carbon atom.
- the number of ring-forming atoms means a compound in which atoms are cyclically bonded, such as atoms forming the ring itself of a single ring compound, a fused ring compound, a crosslinking compound, a carbocyclic compound, and a heterocyclic compound.
- the pyridine ring has 6 ring atoms
- the quinazoline ring has 10 ring atoms
- the furan ring has 5 ring atoms.
- a hydrogen atom and a substituent atom bonded to a ring-forming carbon atom of a pyridine ring or quinazoline ring are not included in the ring-forming atom.
- atoms of the fluorene substituent are not included in the ring-forming atoms.
- the compound (compound (1)) according to one aspect of the present invention is represented by formula (1).
- R 1 to R 8 , R 11 to R 18 , R 21 to R 28 and R 31 to R 38 each independently represent a hydrogen atom, a substituted or unsubstituted carbon number of 1 to 30, preferably 1 to 18, More preferably, it is an alkyl group having 1 to 8 carbon atoms; substituted or unsubstituted ring carbon atoms having a carbon number of 3 to 30, preferably 3 to 10, more preferably 3 to 8, still more preferably 5 or 6; Substituted aryl ring having 6 to 30, preferably 6 to 25, more preferably 6 to 18 carbon atoms; substituted or unsubstituted ring having 5 to 30, preferably 5 to 24, more preferably 5 to 5 ring atoms.
- heteroaryl groups substituted or unsubstituted aralkyl groups having 7 to 36, preferably 7 to 26, and more preferably 7 to 20 carbons; substituted or unsubstituted 1 to 30, preferably 1 to 6 carbon atoms. 18, more preferably 1 to 8 alkoxy groups; substituted or unsubstituted ring-forming carbon atoms having 6 to 30, preferably 6 to 25, more preferably 6 to 18 aryloxy groups; substituted or unsubstituted carbon atoms having 1 It is selected from an alkyl group of -30, preferably 1 to 18, more preferably 1 to 8 and a substituted or unsubstituted aryl group having 6 to 30, preferably 6 to 25, more preferably 6 to 18 ring carbon atoms.
- Mono-, di- or tri-substituted silyl group having a substituent substituted or unsubstituted haloalkyl group having 1 to 30, preferably 1 to 18, more preferably 1 to 8 carbon atoms; substituted or unsubstituted 1 to 30 carbon atoms , Preferably 1 to 18, more preferably 1 to 8; a haloalkoxy group; a halogen atom; a cyano group; or a nitro group.
- the alkyl group is, for example, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, s-butyl group, t-Butyl group, pentyl group (including isomer group), hexyl group (including isomer group), heptyl group (including isomer group), octyl group (including isomer group), nonyl group (isomer) A decyl group (including an isomer group), an undecyl group (including an isomer group), or a dodecyl group (including an isomer group); methyl group, ethyl group, n-propyl group, isopropyl Group, n-butyl group, isobutyl group, s-butyl group, t-butyl group, and
- the cycloalkyl group is, for example, a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, or a cycloheptyl group, and a cyclopentyl group and A cyclohexyl group is preferred.
- the aryl group is, for example, a phenyl group, a biphenylyl group, a terphenylyl group, a naphthyl group, an acenaphthyrenyl group, a biphenylenyl group, a fluorenyl group, an s-indacenyl group , As-indacenyl group, anthryl group, benzoantryl group, aceanthrenyl group, aphenantryl group, phenanthryl group, benzophenanthryl group, phenalenyl group, naphthacenyl group, fluoranthenyl group, pyrenyl group, chrysenyl group, benzochrysenyl group, triphenylenyl group
- the heteroaryl group contains 1 to 5, preferably 1 to 3, more preferably 1 to 2 ring-forming heteroatoms.
- the ring-forming hetero atom is selected, for example, from a nitrogen atom, a sulfur atom and an oxygen atom.
- the free valence of the heteroaryl group may be present on a ring-forming carbon atom or, where structurally possible, on a ring-forming nitrogen atom.
- the heteroaryl group includes, for example, pyrrolyl group, imidazolyl group, pyrazolyl group, triazolyl group, furyl group, thienyl group, oxazolyl group, isoxazolyl group, oxadiazolyl group, thiazolyl group, isothiazolyl group, thiadiazolyl group, pyridyl group, pyridazinyl group, Pyrimidinyl group, pyrazinyl group, triazinyl group, indolyl group, isoindolyl group, indolizinyl group, quinolizinyl group, quinolyl group, isoquinolyl group, cinnolyl group, phthalazinyl group, quinazolinyl group, quinoxalinyl group, benzoimidazolyl group, indazolyl group, phenanthrolinyl group , Phenanthridinyl group,
- Naphthobenzothiophenyl group carbazolyl group or benzocarbazolyl group; more preferably thienyl group, benzothiophenyl group, dibenzofuranyl group, naphthobenzofuranyl group, dibenzothiophenyl group, naphthobenzothio group Phenyl group, carbazolyl Or benzo carbazolyl group.
- substituted heteroaryl group examples include 9-phenylcarbazolyl group, 9-biphenylylcarbazolyl group, 9-phenylphenylcarbazolyl group, 9-naphthylcarbazolyl group, diphenylcarbazol-9-yl Groups, phenyldibenzofuranyl groups, and phenyldibenzothiophenyl groups (phenyldibenzothienyl groups) are preferred.
- the aryl moiety of the aralkyl group is selected from the above aryl groups having 6 to 30, preferably 6 to 25, and more preferably 6 to 18 ring carbon atoms.
- the alkyl moiety corresponds to a group selected from the above-mentioned substituted or unsubstituted alkyl groups having 1 to 30, preferably 1 to 18, and more preferably 1 to 8 carbon atoms.
- the aralkyl group is preferably a benzyl group, a phenethyl group or a phenylpropyl group, more preferably a benzyl group.
- the alkyl moiety of the alkoxy group is the above substituted or unsubstituted alkyl group having 1 to 30, preferably 1 to 18, more preferably 1 to 8 carbon atoms. It is selected from As the alkoxy group, t-butoxy group, propoxy group, ethoxy group and methoxy group are preferable, ethoxy group and methoxy group are more preferable, and methoxy group is more preferable.
- the aryl moiety of the aryloxy group preferably has 6 to 30, preferably 6 to 25, and more preferably 6 to 25 ring carbon atoms. It is selected from 6 to 18 aryl groups.
- the aryloxy group is preferably a terphenyloxy group, a biphenyloxy group, and a phenoxy group, more preferably a biphenyloxy group and a phenoxy group, and still more preferably a phenoxy group.
- the substituent which the mono-, di- or tri-substituted silyl group has is a substituted or unsubstituted alkyl group having 1 to 30, preferably 1 to 18 and more preferably 1 to 8 carbon atoms, and the above-mentioned substituted or unsubstituted alkyl group Are selected from aryl groups having 6 to 30, preferably 6 to 25, and more preferably 6 to 18 ring carbon atoms.
- a tri-substituted silyl group is preferable, for example, trimethylsilyl group, triethylsilyl group, t-butyldimethylsilyl group, propyldimethylsilyl group, isopropyldimethylsilyl group, triphenylsilyl group, phenyldimethylsilyl group, t-butyldiphenylsilyl group, And tritolylsilyl groups.
- the haloalkyl group is at least one, preferably 1-C 1 -C 30, preferably 1 to 18, more preferably 1 to 8 alkyl group. Examples thereof include 7 hydrogen atoms or a group obtained by replacing all hydrogen atoms with halogen atoms.
- the halogen atom is selected from a fluorine atom, a chlorine atom, a bromine atom and an iodine atom, preferably a fluorine atom.
- the haloalkyl group is preferably a fluoroalkyl group having 1 to 30, preferably 1 to 18, and more preferably 1 to 8 carbon atoms, and heptafluoropropyl group (including isomer group), pentafluoroethyl group, 2,2,2, A 2-trifluoroethyl group and a trifluoromethyl group are more preferable, a pentafluoroethyl group, a 2,2,2-trifluoroethyl group and a trifluoromethyl group are more preferable, and a trifluoromethyl group is particularly preferable.
- the haloalkyl moiety of the haloalkoxy group is selected from the above-mentioned haloalkyl groups having 1 to 30, preferably 1 to 18, and more preferably 1 to 8 carbon atoms.
- the haloalkoxy group is preferably a fluoroalkoxy group having 1 to 30, preferably 1 to 18, and more preferably 1 to 8 carbon atoms, and a heptafluoropropoxy group (including an isomer group), a pentafluoroethoxy group, 2,2 , A 2-trifluoroethoxy group and a trifluoromethoxy group are more preferable, a pentafluoroethoxy group, a 2,2,2-trifluoroethoxy group and a trifluoromethoxy group are more preferable, and a trifluoromethoxy group is particularly preferable.
- the halogen atom is a fluorine atom, a chlorine atom, a bromine atom or an iodine atom, preferably a fluorine atom.
- one selected from R 1 to R 8 and R 11 to R 18 represents a single bond to be bonded to * 1.
- two adjacent groups selected from R 1 to R 4 two adjacent groups selected from R 5 to R 8, two adjacent groups selected from R 11 to R 14 , and R 15 to R 18
- Two adjacent adjacent groups may be bonded to each other to form a ring structure, and a ring-forming atom of the ring structure, for example, a carbon atom or a nitrogen atom may be bonded to * 1.
- * 1 may be bonded to any of a carbon atom of a benzene ring of fluorene structure, a carbon atom of a benzene ring of xanthene or thioxanthene structure, and a ring-forming atom of the ring structure.
- one selected from R 21 to R 28 and R 31 to R 38 represents a single bond to be bonded to * 2.
- two adjacent selected from R 21 to R 24, adjacent two selected from R 25 to R 28, two adjacent selected from R 31 to R 34, and selected from R 35 to R 38 Two adjacent adjacent groups may be bonded to each other to form a ring structure, and a ring-forming atom of the ring structure, for example, a carbon atom or a nitrogen atom may be bonded to * 2.
- * 2 may be bonded to any of a carbon atom of a benzene ring of a fluorene structure, a carbon atom of a benzene ring of a xanthene or thioxanthene structure, and a ring-forming atom of the ring structure.
- the two spiro (xanthene fluorene) or spiro (thioxanthene fluorene) backbones attached to * 1 or * 2 are each selected from the following structures: (Wherein, Z is X or Y, * represents that a carbon atom of a benzene ring or a ring-forming atom of the ring structure A, B, or C is bonded to * 1 or * 2; And each R omitted for the purpose is as defined in the formula (1).)
- all of R 1 to R 8 and R 11 to R 18 which do not represent a single bond to be bonded to * 1 and do not form the ring structure may be all hydrogen atoms. In one embodiment of the present invention, all of R 21 to R 28 and R 31 to R 38 which do not represent a single bond to be bonded to * 2 and do not form the ring structure may be hydrogen atoms.
- one selected from R 1 to R 8 and R 11 to R 18 may be a single bond to be bonded to * 1, and all the remaining may be hydrogen atoms.
- one selected from R 21 to R 28 and R 31 to R 38 may be a single bond bonding to * 2, and all the remaining may be hydrogen atoms.
- Two adjacent selected from 18 may be bonded to each other to form a ring structure. In one aspect of the present invention, all two adjacent ones may not form a ring structure.
- adjacent two selected from R 21 to R 24, adjacent two selected from R 25 to R 28, adjacent two selected from R 31 to R 34 , and R 35 to R Adjacent two selected from 38 may be bonded to each other to form a ring structure. In one aspect of the present invention, all two adjacent ones may not form a ring structure.
- the spiro (xanthene fluorene) skeleton or the spiro (thioxanthene fluorene) skeleton in which the ring structure is formed is selected from the following structures. (Wherein Z is X or Y, and a carbon atom of a benzene ring or a ring-forming atom of ring structures a, b, c, d, e, or f is bonded to * 1 or * 2. For simplification) Each R omitted in is as defined in the formula (1).)
- Examples of the ring structure include a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 18 ring carbon atoms, a substituted or unsubstituted aliphatic hydrocarbon ring having 5 to 18 ring carbon atoms, and a substituted or unsubstituted ring. And an aromatic heterocycle having 5 to 18 ring atoms, and a substituted or unsubstituted aliphatic heterocycle having 5 to 18 ring atoms.
- the ring structure may be a fused ring.
- aromatic hydrocarbon ring having 6 to 18 ring carbon atoms examples include aromatic hydrocarbons selected from benzene, biphenylene, naphthalene, anthracene, benzoanthracene, phenanthrene, benzophenanthrene, phenalene, pyrene, chrysene, and triphenylene There is a ring.
- Examples of the aliphatic hydrocarbon ring having 5 to 18 ring carbon atoms include a cyclopentene ring, cyclopentadiene ring, cyclohexene ring, cyclohexadiene ring, and an aromatic hydrocarbon ring having 6 to 18 ring carbon atoms. And aliphatic rings obtained by partial hydrogenation.
- aromatic heterocycle having 5 to 18 ring atoms examples include pyrrole, furan, thiophene, pyridine, imidazole, pyrazole, indole, isoindole, benzofuran, isobenzofuran, benzothiophene, benzoimidazole, indazole, dibenzofuran, and the like.
- aromatic heterocycles selected from naphthobenzofuran, dibenzothiophene, naphthobenzothiophene, carbazole, and benzocarbazole.
- Examples of the aliphatic heterocycle having 5 to 18 ring atoms include an aliphatic ring obtained by partially hydrogenating the above-mentioned aromatic heterocycle having 5 to 18 ring atoms.
- a benzene ring is preferable.
- one selected from R 1 to R 8 and R 11 to R 18 is preferably a single bond that bonds to * 1, and is selected from R 2 to R 7 , R 12 and R 17 More preferably, one of them is a single bond that bonds to * 1, and further preferably, one selected from R 2 to R 7 is a single bond that bonds to * 1, R 2 , R 4 , R 5 , It is particularly preferable that one selected from and R 7 be a single bond which bonds to * 1.
- one selected from R 21 to R 28 and R 31 to R 38 is a single bond that bonds to * 2, and it is selected from R 22 to R 27 , R 32 and R 37 It is more preferable that one of them be a single bond that bonds to * 2, and further preferably one that is selected from R 22 to R 27 is a single bond that bonds to * 2, R 22 , R 24 , R 25 , It is particularly preferable that one selected from R 27 and R 27 be a single bond that bonds to * 2.
- the compound (1) contains a compound represented by any of the formulas (2) to (7).
- R 1 to R 8 , R 11 to R 18 , R 21 to R 28 , R 31 to R 38 , X, Y, L 1 , L 2 and L 3 are the above-mentioned the same as.
- the aromatic hydrocarbon ring having 6 to 18 ring carbon atoms, the aliphatic hydrocarbon ring having 5 to 18 ring carbon atoms, and the aromatic complex having 5 to 18 ring atoms may be bonded to * 1 or * 2.
- L 1 , L 2 and L 3 each independently represent a single bond, a substituted or unsubstituted arylene group having 6 to 30, preferably 6 to 25, more preferably 6 to 18 ring carbon atoms, or a substituted or non-substituted arylene group It is a heteroarylene group having 5 to 30, preferably 5 to 24, more preferably 5 to 13 ring atoms, which is substituted.
- the arylene group is, for example, a phenylene group, a biphenylylene group, a terphenylylene group, a naphthylene group, an anthrylene group, a benzoanthrylene group, Phenanthrylene group, benzophenanthrylene group, phenarenylene group, picenylene group, pentaphenylene group, pyrenylene group, chrysenylene group, benzochrysenylene group, triphenylenylene group, fluorantenylene group, fluorenylene group, or 9,9'- A spirobifluorenylene group; preferably a phenylene group, a biphenylylene group, a terphenylylene group, or a naphthylene group; more preferably a group selected from the following formulas
- a 9,9-dimethylfluorenediyl group a 9,9-diphenylfluorenediyl group, and a 9,9'-spirobifluorenediyl group are preferable.
- the heteroarylene group is 1 to 5, preferably 1 to 3, more preferably 1 to 2 rings.
- the ring-forming hetero atom is selected from, for example, a nitrogen atom, a sulfur atom and an oxygen atom.
- the free valence may be present on a ring-forming carbon atom or, if structurally possible, on a nitrogen atom.
- heteroarylene group examples include pyrrole, imidazole, pyrazole, triazole, furan, thiophene, oxazole, isoxazole, oxadiazole, thiazole, isothiazole, thiadiazole, pyridine, pyridazine, pyrimidine, pyrazine, triazine, indole, iso Indole, indolizine, quinolizine, quinoline, isoquinoline, cinnoline, phthalazine, quinazoline, quinoxaline, benzimidazole, indazole, phenanthroline, phenanthridine, acridine, phenazine, carbazole, benzocarbazole, xanthene, benzofuran, isobenzofuran, dibenzofuran, naphthobenzofuran , Benzothiophene, dibenzothiophene, naphtho
- the two free valences of the arylene group or heteroarylene group of L 1 and L 2 are each independently one bonded to the central nitrogen atom, and the other is a spiro (xanthene fluorene) skeleton or spiro (thioxanthene fluorene) Bind to the skeleton.
- L 1 and L 2 are preferably each a single bond or a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms.
- L 1 and L 2 is a single bond in one aspect of the present invention, in another aspect of the present invention is one single bond of L 1 and L 2, the other is a substituted or unsubstituted ring It is preferable that it is an arylene group having 6 to 30 carbon atoms, and in another aspect of the present invention, it is preferable that L 1 and L 2 each be a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms. .
- the details of the arylene group are as described above.
- the arylene group is, for example, phenylene group, biphenylylene group, terphenylylene group, naphthylene group, anthrylene group, benzoanthrylene group, phenanthrylene group, Benzophenanthrylene group, phenarelenylene group, picenylene group, pentaphenylene group, pyrenylene group, chrysenylene group, benzochrysenylene group, triphenylenylene group, fluorantenylene group, fluorenylene group, or 9,9'-spirobifur
- a biphenylylene group, a terphenylylene group, a naphthylene group, a phenanthrylene group, or a fluorenylene group more preferably a group selected from the following formulas; More preferably a group selected from the following formulas; More preferably
- a substituted arylene group a 9,9-dimethylfluorenediyl group, a 9,9-diphenylfluorenediyl group, and a 9,9'-spirobifluorenediyl group are preferable.
- L 3 has 1 to 5, preferably 1 to 3, more preferably 1 to 2 ring-forming heteroatoms.
- the ring-forming hetero atom is selected from, for example, a nitrogen atom, a sulfur atom and an oxygen atom.
- the free valence may be present on a ring-forming carbon atom or, if structurally possible, on a nitrogen atom.
- heteroarylene group examples include pyrrole, imidazole, pyrazole, triazole, furan, thiophene, oxazole, isoxazole, oxadiazole, thiazole, isothiazole, thiadiazole, pyridine, pyridazine, pyrimidine, pyrazine, triazine, indole, iso Indole, indolizine, quinolizine, quinoline, isoquinoline, cinnoline, phthalazine, quinazoline, quinoxaline, benzimidazole, indazole, indazole, phenanthroline, phenanthridine, acridine, phenazine, carbazole, benzocarbazole, xanthene, benzofuran, isobenzofuran, dibenzofuran, naphthobenzofuran , Benzothiophene, dibenzothiophene,
- the two free valences of the arylene or heteroarylene group of L 3 have one attached to the central nitrogen atom and the other attached to the spiro (xanthene fluorene) backbone or the spiro (thioxanthene fluorene) backbone.
- L 3 is preferably a single bond or a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms.
- L 3 is preferably a single bond, and in another aspect of the present invention, L 3 is a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, such as o-phenylene It is preferable that it is a group, m-phenylene group, p-phenylene group, 1,4-naphthylene group or 2,6-naphthylene group.
- Ar is a substituted or unsubstituted aryl group having 6 to 30, preferably 6 to 25, and more preferably 6 to 18 ring carbon atoms; substituted or unsubstituted ring forming atoms having 5 to 30, preferably 5 to 24, More preferably, 5 to 13 nitrogen-containing heteroaryl groups; substituted or unsubstituted ring-forming atoms having 5 to 30, preferably 5 to 24, more preferably 5 to 13 oxygen-containing heteroaryl groups; or substituted or unsubstituted Of 5 to 30, preferably 5 to 24 and more preferably 5 to 13 ring atoms.
- Ar is a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted oxygen-containing heteroaryl group having 5 to 30 ring atoms, or a substituted or unsubstituted ring.
- Ar is preferably a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms. In another embodiment of the present invention, Ar is preferably a substituted or unsubstituted nitrogen-containing heteroaryl group having 5 to 30 ring atoms. In another embodiment of the present invention, Ar is preferably a substituted or unsubstituted oxygen-containing heteroaryl group having 5 to 30 ring atoms. In yet another embodiment of the present invention, Ar is preferably a substituted or unsubstituted sulfur-containing heteroaryl group having 5 to 30 ring atoms.
- the aryl group is, for example, phenyl group, biphenylyl group, terphenylyl group, naphthyl group, acenaphthyrenyl group, biphenylenyl group, fluorenyl group, s-indacenyl Group, as-indacenyl group, anthryl group, benzoantryl group, aceanthrenyl group, aphenantryl group, phenanthryl group, benzophenanthryl group, phenalenyl group, naphthacenyl group, fluoranthenyl group, pyrenyl group, chrysenyl group, benzochrysenyl group, triphenylenyl group
- the substituted aryl group is preferably 9,9'-spirobifluorenyl group, 9,9-diphenylfluorenyl group or 9,9-dimethylfluorenyl group, and more preferably 9,9 '.
- the nitrogen-containing heteroaryl group is, for example, pyrrolyl group, imidazolyl group, pyrazolyl group, triazolyl group, oxazolyl group, isoxazolyl group, Oxadiazolyl group, thiazolyl group, isothiazolyl group, thiadiazolyl group, pyridyl group, pyridazinyl group, pyrimidinyl group, pyrazinyl group, triazinyl group, indolyl group, isoindolyl group, indolydryl group, quinolizinyl group, quinolyl group, isoquinolyl group, cinnoyl group, phthalazinyl group , Quinazolinyl group, quinoxalinyl group, benzimidazolyl group, indazolyl group, phenanthrol
- the oxygen-containing heteroaryl group is, for example, furyl group, oxazolyl group, isoxazolyl group, oxadiazolyl group, xanthenyl group, benzofuranyl group, Isobenzofuranyl group, dibenzofuranyl group, naphthobenzofuranyl group, benzoxazolyl group, benzoisoxazolyl group, phenoxazinyl group, or spiro [9H-xanthene-9,9 '-[9H] fluorene
- a furyl group, a benzofuranyl group, a dibenzofuranyl group, a naphthobenzofuranyl group, or a monovalent of spiro [9H-xanthene-9,9 '-[9H] fluorene Preferably a furyl group, a benzofuranyl group, a dibenzofuranyl group, a naphthobenzofuranyl group,
- a dibenzofuranyl group, a naphthobenzofuranyl group, or [9H-xanthene-9,9 '-[9H] fluorene] is a monovalent residue; more preferably dibenzofuranyl group or spiro [9H-xanthene-9,9'-[9H] fluorene].
- the sulfur-containing heteroaryl group is, for example, a thienyl group, a thiazolyl group, an isothiazolyl group, a thiadiazolyl group, a benzothiophenyl group or a dibenzo group.
- dibenzothiophenyl group, naphthobenzothiophenyl group, or [9H-thioxanthene-9,9 '-[9H] fluorene] is a monovalent residue; more preferably a dibenzothiophenyl
- 1-dibenzothiophenyl group 2-dibenzothiophenyl group, 3-dibenzothiophenyl group, 4-dibenzothiophenyl group, spiro [9H-thioxanthene-9,9. '-[9H] fluorene] 2'-yl group, spiro [9H-thioxanthene-9,9'-[9H] fluorene] 3'-yl group, or spiro [9H-thioxanthene-9,9'-] [9H] fluorene] 4'-yl group.
- L 3 is selected from a single bond, a phenylene group, a biphenylene group, a terphenylene group, and a naphthylene group, preferably a phenylene group and a naphthylene group
- Ar is a phenyl group, a biphenylyl group, a terphenylyl group, Naphthyl group, phenanthryl group, triphenylenyl group, 9,9'-spirobifluorenyl group, 9,9-diphenylfluorenyl group, 9,9-dimethylfluorenyl group, dibenzofuranyl group, spiro [9H- From a monovalent residue of xanthene-9,9 '-[9H] fluorene], a dibenzothiophenyl group, and a monovalent residue of spiro [9H-thioxanthene-9,9'-[9H] fluoren
- the optional substituent when “substituted or unsubstituted” is substituted or unsubstituted alkyl having 1 to 30, preferably 1 to 18, more preferably 1 to 8 carbon atoms.
- the method for producing the compound (1) is not particularly limited, and those skilled in the art can easily produce the compound according to the methods described in the following examples, or by modifying the method with reference to known synthetic methods. Can.
- the organic EL element material of the present invention contains a compound (1).
- the content of the compound (1) in the material for an organic EL device of the present invention is not particularly limited, and may be, for example, 1% by mass or more (including 100%), and 10% by mass or more (including 100%) Is preferably 50% by mass or more (including 100%), more preferably 80% by mass or more (including 100%), and further preferably 90% by mass or more (including 100%). Is particularly preferred.
- the material for an organic EL device of the present invention is useful for the production of an organic EL device.
- the organic EL element has an organic layer between the cathode and the anode.
- the organic layer contains a light emitting layer, and at least one of the organic layers contains the compound (1).
- the organic layer containing the compound (1) include a hole transport zone (a hole transport layer, a hole injection layer, an electron blocking layer, an exciton blocking layer, etc.) provided between the anode and the light emitting layer, Although a light emitting layer, a space layer, an electron transport zone (electron transport layer, an electron injection layer, a hole blocking layer, etc.) provided between a cathode and a light emitting layer, and the like can be mentioned, the invention is not limited thereto.
- the compound (1) is used as a material of a hole transport zone or light emitting layer of a fluorescent or phosphorescent EL device, preferably a material of a hole transport zone, more preferably a material of a hole transport layer.
- the organic EL device of the present invention may be a fluorescent or phosphorescent single color light emitting device, a fluorescent / phosphorescent hybrid white light emitting device, or a simple type having a single light emitting unit. It may be a tandem type having a plurality of light emitting units, and is preferably a fluorescent light emitting element.
- the “light emitting unit” refers to a minimum unit including an organic layer, at least one of which is a light emitting layer, and emitting light by recombination of injected holes and electrons.
- the light emitting unit may be a laminated type having a plurality of phosphorescent light emitting layers or fluorescent light emitting layers, in which case excitons generated in the phosphorescent light emitting layer diffuse into the fluorescent light emitting layer A space layer may be provided between the respective light emitting layers to prevent this.
- the typical layer configuration of the simple type light emitting unit is shown below. The layers in parentheses are optional.
- A (hole injection layer /) hole transport layer / fluorescent light emitting layer (/ electron transport layer / electron injection layer)
- B (hole injection layer /) hole transport layer / phosphorescent light emitting layer (/ electron transport layer / electron injection layer)
- C (hole injection layer /) hole transport layer / first fluorescence emission layer / second fluorescence emission layer (/ electron transport layer / electron injection layer)
- D (hole injection layer /) hole transport layer / first phosphorescent light emitting layer / second phosphorescent light emitting layer (/ electron transport layer / electron injection layer)
- E (hole injection layer /) hole transport layer / phosphorescent light emitting layer / space layer / fluorescent light emitting layer (/ electron transport layer / electron injection layer)
- F (hole injection layer /) hole transport layer / first phosphorescent light emitting layer / second phosphorescent light emitting layer / space layer / fluorescent light emitting layer (/ electron transport layer / electron injection layer)
- G
- the plurality of phosphorescent light emitting layers, and the phosphorescent light emitting layer and the fluorescent light emitting layer may be light emitting layers of different colors.
- the light emitting unit (f) is a hole transporting layer / first phosphorescent light emitting layer (red light emitting) / second phosphorescent light emitting layer (green light emitting) / space layer / fluorescent light emitting layer (blue light emitting) / electron transporting layer It may be.
- An electron blocking layer may be provided between each light emitting layer and the hole transport layer or the space layer.
- a hole blocking layer may be provided between each light emitting layer and the electron transporting layer.
- the following element configuration can be mentioned as a typical element configuration of a tandem type organic EL element.
- the intermediate layer is generally referred to as an intermediate electrode, an intermediate conductive layer, a charge generation layer, an electron extracting layer, a connection layer, an intermediate insulating layer, and the first light emitting unit has electrons and the second light emitting unit has holes. It is a layer to be supplied, and can be formed of a known material.
- FIG. 1 shows a schematic configuration of an example of the organic EL element.
- the organic EL element 1 has a substrate 2, an anode 3, a cathode 4, and a light emitting unit (organic layer) 10 disposed between the anode 3 and the cathode 4.
- the light emitting unit 10 has at least one light emitting layer 5.
- Hole transport zone 6 hole injection layer, hole transport layer, etc.
- electron transport zone 7 electron injection layer, electron transport layer
- FIG. 2 shows an example in which each of the hole transport zone 6 and the electron transport zone 7 in FIG. 1 has a two-layer structure.
- the hole transport zone 6 a on the anode side may be referred to as a first hole transport layer
- the hole transport zone 6 b on the cathode side may be referred to as a second hole transport layer.
- the electron transport zone 7a on the anode side may be referred to as a first electron transport layer
- the hole transport zone 7b on the cathode layer side may be referred to as a second hole transport layer.
- a host combined with a fluorescent dopant is referred to as a fluorescent host
- a host combined with a phosphorescent dopant is referred to as a phosphorescent host.
- the fluorescent host and the phosphorescent host are not distinguished only by the molecular structure. That is, the term "phosphorescent host” means a material that forms a phosphorescent light emitting layer containing a phosphorescent dopant, and does not necessarily mean that it can not be used as a material that forms a fluorescent light emitting layer. The same is true for fluorescent hosts.
- Substrate The substrate is used as a support for the light emitting device.
- a material of the substrate for example, glass, quartz, plastic or the like can be used.
- a flexible substrate may be used.
- flexible substrates include plastic substrates made of polycarbonate, polyarylate, polyether sulfone, polypropylene, polyester, polyvinyl fluoride, or polyvinyl chloride, and inorganic vapor deposition films.
- anode formed on the anode substrate it is preferable to use a metal having a high work function (for example, 4.0 eV or more), an alloy, an electrically conductive compound, and a mixture thereof.
- a metal having a high work function for example, 4.0 eV or more
- ITO Indium Tin Oxide
- indium oxide-tin oxide containing silicon or silicon oxide indium oxide-zinc oxide
- indium oxide containing tungsten oxide and zinc oxide graphene, etc.
- gold, platinum, nickel, tungsten, chromium, molybdenum, iron, cobalt, copper, palladium, titanium, nitrides of the above metals (eg, titanium nitride) and the like can be mentioned.
- anode materials are usually deposited by sputtering.
- indium oxide-zinc oxide is deposited by sputtering a target obtained by adding 1 to 10 wt% of zinc oxide to indium oxide.
- Indium oxide containing tungsten oxide and zinc oxide is deposited by sputtering a target containing 0.5 to 5 wt% of tungsten oxide and 0.1 to 1 wt% of zinc oxide with respect to indium oxide.
- the anode may be formed by another method, for example, a vacuum evaporation method, a coating method, an inkjet method, a spin coating method, or the like.
- the hole injection layer formed in contact with the anode is formed using a material that facilitates hole injection regardless of the work function of the anode. Therefore, as the anode material, general materials such as metals, alloys, electrically conductive compounds, mixtures thereof, and elements belonging to Group 1 or 2 of the periodic table of the elements can be used. Materials having a low work function, for example, alkali metals such as lithium and cesium, alkaline earth metals such as magnesium, calcium and strontium, alloys containing these metals (for example, MgAg and AlLi), rare earth metals such as europium and ytterbium, An alloy or the like containing a rare earth metal can also be used as the anode material.
- alkali metals such as lithium and cesium
- alkaline earth metals such as magnesium, calcium and strontium
- alloys containing these metals for example, MgAg and AlLi
- rare earth metals such as europium and ytterbium
- anode When the anode is formed using an alkali metal, an alkaline earth metal, or an alloy containing any of these metals, a vacuum evaporation method or a sputtering method can be used. Furthermore, in the case of using a silver paste or the like, a coating method, an inkjet method, or the like can be used.
- the hole injection layer is a layer including a material having a high hole injection property (hole injection material).
- Hole injecting materials include molybdenum oxide, titanium oxide, vanadium oxide, rhenium oxide, ruthenium oxide, chromium oxide, zirconium oxide, hafnium oxide, tantalum oxide, silver oxide, tungsten oxide Or manganese oxide can be used.
- Low molecular weight organic compounds for example, 4,4 ′, 4 ′ ′-tris (N, N-diphenylamino) triphenylamine (abbreviation: TDATA), 4,4 ′, 4 ′ ′-tris [N- (3- (3) Methylphenyl) -N-phenylamino] triphenylamine (abbreviation: MTDATA), 4,4′-bis [N- (4-diphenylaminophenyl) -N-phenylamino] biphenyl (abbr .: DPAB), 4,4 '-Bis (N- ⁇ 4- [N'-(3-methylphenyl) -N'-phenylamino] phenyl ⁇ -N-phenylamino) biphenyl (abbreviation: DNTPD), 1,3,5-tris [N -(4-Diphenylaminophenyl) -N-phenylamino] benzene (abbreviation
- Polymer compounds for example, poly (N-vinylcarbazole) (abbreviation: PVK), poly (4-vinyltriphenylamine) (abbreviation: PVTPA), poly [N- (4- ⁇ N '-[4- (4-diphenylamino) phenyl] phenyl-N'-phenylamino ⁇ phenyl) methacrylamide] (abbreviation: PTPDMA), poly [N, N'-bis (4-butylphenyl) -N, N′-bis (phenyl) benzidine] (abbreviation: Poly-TPD) or the like can also be used as a hole injection layer material.
- PVK poly (N-vinylcarbazole)
- PVTPA poly (4-vinyltriphenylamine)
- PTPDMA poly [N- (4- ⁇ N '-[4- (4-diphenylamino) phenyl] phenyl-N'-phenylamino
- a polymer compound to which an acid such as poly (3,4-ethylenedioxythiophene) / poly (styrene sulfonic acid) (PEDOT / PSS), polyaniline / poly (styrene sulfonic acid) (PAni / PSS), or the like is added is used. It can also be done.
- acceptor material such as a hexaazatriphenylene (HAT) compound represented by the following formula (K).
- HAT hexaazatriphenylene
- R 21 to R 26 may be the same as or different from each other, and are each independently a cyano group, -CONH 2 , a carboxyl group, or -COOR 27 (wherein R 27 represents an alkyl group having 1 to 20 carbon atoms or carbon And represents a cycloalkyl group of 3 to 20) provided that R 21 and R 22 , R 23 and R 24 , or R 25 and R 26 are bonded to each other to represent -CO-O-CO- May form a group)
- R 27 include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a t-butyl group, a cyclopentyl group and a cyclohexyl group.
- a compound represented by the following formula (2-1) or (2-2) is also preferable as the hole injection layer material.
- Ar 21 is a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 30 ring carbon atoms, or a substituted or unsubstituted ring having 5 to 30 ring atoms.
- the aromatic hydrocarbon ring is preferably a benzene ring.
- the aromatic heterocyclic ring is preferably a ring having 6 ring atoms, such as a pyridine ring, a pyrazine ring and a pyridazine ring.
- X 23 to X 28 each independently represent C (R) or a nitrogen atom.
- R independently represents a hydrogen atom, a halogen atom, a hydroxyl group, a cyano group, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted group Or a monosubstituted, disubstituted or trisubstituted silyl group having a substituent selected from an unsubstituted alkyl group having 1 to 30 carbon atoms and a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, substituted or unsubstituted Alkoxy group having an alkyl group having 1 to 30 carbon atoms, aryloxy group having a substituted or unsubstituted aryl group having 6 to 30 ring carbon atom
- a 21 to a 23 each represent a ring structure represented by the following formula (2b).
- X 20 in the formula (2b) is represented by any one of the following formulas (2b-1) to (2b-12). (In the formulas (2b-1) to (2b-12), R 20 has the same meaning as R.)
- R 23 to R 28 are each independently synonymous with R.
- the hole transport layer is a layer including a material having a high hole transportability (hole transportable material). It is preferable to use the compound (1) of the present invention alone or in combination with the following compounds in the hole transport layer.
- an aromatic amine compound As a hole transportable material other than a compound (1), an aromatic amine compound, a carbazole derivative, an anthracene derivative etc. can be used, for example.
- aromatic amine compound examples include 4,4′-bis [N- (1-naphthyl) -N-phenylamino] biphenyl (abbreviation: NPB) and N, N′-bis (3-methylphenyl)- N, N'-diphenyl- [1,1'-biphenyl] -4,4'-diamine (abbreviation: TPD), 4-phenyl-4 '-(9-phenylfluoren-9-yl) triphenylamine (abbreviation) : BAFLP), 4,4'-bis [N- (9,9-dimethylfluoren-2-yl) -N-phenylamino] biphenyl (abbreviation: DFLDPBi), 4,4 ', 4 "-tris (N, N-diphenylamino) triphenylamine (abbreviation: TDATA), 4,4 ′, 4 ′ ′-tris [N- (3-methylphenyl) -N-pheny
- carbazole derivative examples include 4,4′-di (9-carbazolyl) biphenyl (abbreviation: CBP), 9- [4- (9-carbazolyl) phenyl] -10-phenylanthracene (abbreviation: CzPA), 9 And -phenyl-3- [4- (10-phenyl-9-anthryl) phenyl] -9H-carbazole (abbreviation: PCzPA) and the like.
- CBP 4,4′-di (9-carbazolyl) biphenyl
- CzPA 9- [4- (9-carbazolyl) phenyl] -10-phenylanthracene
- PCzPA 9 And -phenyl-3- [4- (10-phenyl-9-anthryl) phenyl] -9H-carbazole
- anthracene derivative examples include 2-t-butyl-9,10-di (2-naphthyl) anthracene (abbreviation: t-BuDNA), 9,10-di (2-naphthyl) anthracene (abbreviation: DNA), 9,10-diphenylanthracene (abbreviation: DPAnth) and the like.
- a high molecular compound such as poly (N-vinylcarbazole) (abbreviation: PVK) or poly (4-vinyltriphenylamine) (abbreviation: PVTPA) can also be used for the hole transport layer.
- PVK poly (N-vinylcarbazole)
- PVTPA poly (4-vinyltriphenylamine)
- a compound other than the above may be used as the hole transport layer material.
- the hole transport layer may be a single layer or a laminate of two or more layers.
- the hole transport layer may be a layer including a first hole transport layer (anode side) and a second hole transport layer (cathode side).
- the compound (1) may be contained in one or both of the first hole transport layer and the second hole transport layer, provided that the compound (1) is contained in the first hole transport layer.
- the compound (1) contained is different from the compound (1) contained in the second hole transport layer.
- Each layer of two or more hole transport layers may contain a hole transport material other than the above-mentioned compound (1).
- the compound (1) is contained in only one of the first hole transport layer and the second hole transport layer, and in another aspect, the compound (1) is a first positive compound.
- the compound is preferably contained only in the hole transport layer, and in still another embodiment, preferably the compound (1) is contained only in the second hole transport layer, and in still another embodiment, the compound (1) is It is preferable to be included in both the one hole transport layer and the second hole transport layer.
- the light-emitting layer is a layer including a highly light-emitting material (dopant material), and various materials such as a fluorescent light-emitting material and a phosphorescent light-emitting material can be used as the dopant material.
- the fluorescent material is a compound that emits light from a singlet excited state
- the phosphorescent material is a compound that emits light from a triplet excited state.
- pyrene derivatives As blue-based fluorescent light emitting materials, pyrene derivatives, styrylamine derivatives, chrysene derivatives, fluoranthene derivatives, fluorene derivatives, diamine derivatives, triarylamine derivatives and the like can be used.
- N, N'-bis [4- (9H-carbazol-9-yl) phenyl] -N, N'-diphenylstilbene-4,4'-diamine (abbreviation: YGA2S)
- 4- (9H) -Carbazol-9-yl) -4 '-(10-phenyl-9-anthryl) triphenylamine (abbreviation: YGAPA)
- 4- (10-phenyl-9-anthryl) -4'-(9-phenyl-9H) And -carbazol-3-yl) triphenylamine abbreviation: PCBAPA
- An aromatic amine derivative or the like can be used as a green fluorescent light emitting material.
- tetracene derivatives As a red fluorescent light emitting material, tetracene derivatives, diamine derivatives and the like can be used. Specifically, N, N, N ', N'-tetrakis (4-methylphenyl) tetracene-5,11-diamine (abbreviation: p-mPhTD), 7,14-diphenyl-N, N, N', N'-tetrakis (4-methylphenyl) acenaphtho [1,2-a] fluoranthene-3,10-diamine (abbreviation: p-mPhAFD) and the like can be mentioned.
- p-mPhTD N, N, N ', N'-tetrakis (4-methylphenyl) tetracene-5,11-diamine
- p-mPhTD 7,14-diphenyl-N
- N, N', N'-tetrakis (4-methylphenyl)
- metal complexes such as iridium complex, osmium complex and platinum complex are used.
- metal complexes such as iridium complex, osmium complex and platinum complex.
- iridium complex bis [2- (4 ', 6'-difluorophenyl) pyridinato-N, C2'] iridium (III) tetrakis (1-pyrazolyl) borate (abbreviation: FIr 6), bis [2- (4 ') 6,6'-Difluorophenyl) pyridinato-N, C2 '] iridium (III) picolinate (abbreviation: FIrpic), bis [2- (3', 5'-bistrifluoromethylphenyl) pyridinato-N, C2 '] iridium ( III) Picolinate (abbreviation: Ir (CF3 ppy) 2 (pic)), bis [2- (4 ', 6'-difluoropheny
- An iridium complex or the like is used as a green phosphorescence emitting material.
- metal complexes such as iridium complex, platinum complex, terbium complex, and europium complex are used.
- metal complexes such as iridium complex, platinum complex, terbium complex, and europium complex are used.
- iridium complex bis [2- (2′-benzo [4,5- ⁇ ] thienyl) pyridinato-N, C3 ′] iridium (III) acetylacetonate (abbreviation: Ir (btp) 2 (acac)), Bis (1-phenylisoquinolinato-N, C2 ') iridium (III) acetylacetonate (abbreviation: Ir (piq) 2 (acac)), (acetylacetonato) bis [2,3-bis (4-fluoro) Phenyl) quinoxarinato] iridium (III) (abbreviation: Ir (Fdpq) 2 (acac)), 2,3,7
- tris (acetylacetonato) (monophenanthroline) terbium (III) (abbreviation: Tb (acac) 3 (Phen)
- tris (1,3-diphenyl-1,3-propanedionato) (monophenanthroline) europium (III) (abbreviation: Eu (DBM) 3 (Phen)
- tris [1- (2-thenoyl) -3,3,3-trifluoroacetonato] (monophenanthroline) europium (III) (abbreviation: Eu ( A rare earth metal complex such as TTA) 3 (Phen)) can be used as a phosphorescent material because the rare earth metal ion emits light (electron transition between different multiplicity).
- the above-described dopant material may be dispersed in another material (host material). It is preferable to use a material having a lowest vacant orbital level (LUMO level) higher than that of the dopant material and a lowest occupied orbital level (HOMO level).
- LUMO level lowest vacant orbital level
- HOMO level lowest occupied orbital level
- host materials include (1) metal complexes such as aluminum complex, beryllium complex, zinc complex, etc. (2) Heterocyclic compounds such as oxadiazole derivatives, benzimidazole derivatives, phenanthroline derivatives, (3) Fused aromatic compounds such as carbazole derivatives, anthracene derivatives, phenanthrene derivatives, pyrene derivatives, chrysene derivatives, etc. (4) Aromatic amine compounds such as triarylamine derivatives and fused polycyclic aromatic amine derivatives are used.
- metal complex examples include tris (8-quinolinolato) aluminum (III) (abbreviation: Alq), tris (4-methyl-8-quinolinolato) aluminum (III) (abbreviation: Almq3), and bis (10-hydroxybenzo).
- fused aromatic compound examples include 9- [4- (10-phenyl-9-anthryl) phenyl] -9H-carbazole (abbreviation: CzPA), 3,6-diphenyl-9- [4- (10-) Phenyl-9-anthryl) phenyl] -9H-carbazole (abbreviation: DPCzPA), 9,10-bis (3,5-diphenylphenyl) anthracene (abbreviation: DPPA), 9,10-di (2-naphthyl) anthracene (abbreviation: DPPA) Abbreviations: DNA), 2-tert-butyl-9,10-di (2-naphthyl) anthracene (abbreviation: t-BuDNA), 9,9'-bianthryl (abbreviation: BANT), 9,9 '-(stilbene- 3,3'-diyl) diphenanthrene (abbr .: DPNS), 9,9
- aromatic amine compound examples include N, N-diphenyl-9- [4- (10-phenyl-9-anthryl) phenyl] -9H-carbazol-3-amine (abbreviation: CzA1PA), 4- (10) -Phenyl-9-anthryl) triphenylamine (abbreviation: DPhPA), N, 9-diphenyl-N- [4- (10-phenyl-9-anthryl) phenyl] -9H-carbazol-3-amine (abbreviation: PCAPAP) N) 9-Diphenyl-N- ⁇ 4- [4- (10-phenyl-9-anthryl) phenyl] phenyl ⁇ -9H-carbazol-3-amine (abbreviation: PCAPBA), N- (9, 10-) Diphenyl-2-anthryl) -N, 9-diphenyl-9H-carbazol-3-amine (abbreviation: 2PCAPA), 4,4'-bis [
- the electron transport layer is a layer containing a material having high electron transportability (electron transportable material).
- a material having high electron transportability for example, (1) Metal complexes such as aluminum complex, beryllium complex, zinc complex, (2) aromatic heterocyclic compounds such as imidazole derivatives, benzimidazole derivatives, azine derivatives, carbazole derivatives, phenanthroline derivatives, (3) Polymer compounds can be used.
- a metal complex for example, tris (8-quinolinolato) aluminum (III) (abbreviation: Alq), tris (4-methyl-8-quinolinolato) aluminum (abbreviation: Almq3), bis (10-hydroxybenzo [h] quinolinato ) Beryllium (abbreviation: BeBq 2 ), bis (2-methyl-8-quinolinolato) (4-phenylphenolato) aluminum (III) (abbreviation: BAlq), bis (8-quinolinolato) zinc (II) (abbreviation: Znq) And bis [2- (2-benzoxazolyl) phenolato] zinc (II) (abbreviation: ZnPBO) and bis [2- (2-benzothiazolyl) phenolato] zinc (II) (abbreviation: ZnBTZ).
- heteroaromatic compounds examples include 2- (4-biphenylyl) -5- (4-tert-butylphenyl) -1,3,4-oxadiazole (abbreviation: PBD), 1,3-bis [5 -(Ptert-Butylphenyl) -1,3,4-oxadiazol-2-yl] benzene (abbreviation: OXD-7), 3- (4-tert-butylphenyl) -4-phenyl-5- (4 -Biphenylyl) -1,2,4-triazole (abbreviation: TAZ), 3- (4-tert-butylphenyl) -4- (4-ethylphenyl) -5- (4-biphenylyl) -1,2,4 -Triazole (abbreviation: p-EtTAZ), bathophenanthroline (abbreviation: BPhen), vasocuproin (abbreviation: BCP), 4,4'-bis (5-methylbenzo
- polymer compound for example, poly [(9,9-dihexylfluorene-2,7-diyl) -co- (pyridine-3,5-diyl)] (abbreviation: PF-Py), poly [(9, 9-dioctylfluorene-2,7-diyl) -co- (2,2'-bipyridine-6,6'-diyl)] (abbreviation: PF-BPy) can be mentioned.
- PF-Py poly [(9,9-dihexylfluorene-2,7-diyl) -co- (pyridine-3,5-diyl)]
- PF-BPy poly [(9, 9-dioctylfluorene-2,7-diyl) -co- (2,2'-bipyridine-6,6'-diyl)]
- the above material is a compound having an electron mobility of 10 ⁇ 6 cm 2 / Vs or more.
- materials other than the above may be used for the electron transporting layer as long as the material has an electron transporting property higher than the hole transporting property.
- the electron transport layer may be not only a single layer, but also a laminate of two or more layers each containing the above material.
- the layer on the anode side is referred to as a first electron transport layer
- the layer on the cathode side is referred to as a second electron transport layer.
- the electron injection layer is a layer containing a material having a high electron injection property (electron injection material).
- a material having a high electron injection property electron injection material
- an alkali metal such as lithium, cesium, calcium, lithium fluoride, cesium fluoride, calcium fluoride, lithium oxide or the like, an alkaline earth metal, or a compound thereof can be used.
- an electron transporting compound containing an alkali metal, an alkaline earth metal, or a compound thereof, such as an Alq containing magnesium may be used. In this case, electron injection from the cathode can be performed more efficiently.
- a composite material containing an organic compound and an electron donor (donor) may be used for the electron injection layer.
- Such a composite material is excellent in the electron injecting property and the electron transporting property since the organic compound receives the electron from the electron donor. It is preferable that it is a compound excellent in transport of the received electron as this organic compound,
- electron transport layer material a metal complex, an aromatic heterocyclic compound, etc. mentioned above can be used.
- the electron donor may be any compound capable of donating electrons to the organic compound.
- alkali metals, alkaline earth metals and rare earth metals are preferable, and lithium, cesium, magnesium, calcium, erbium, ytterbium and the like can be mentioned.
- alkali metal oxides and alkaline earth metal oxides are preferable, and lithium oxide, calcium oxide, barium oxide and the like can be mentioned.
- Lewis bases such as magnesium oxide can be used.
- an organic compound such as tetrathiafulvalene (abbreviation: TTF) can also be used.
- the cathode is preferably formed of a metal having a small work function (for example, 3.8 eV or less), an alloy, an electrically conductive compound, a mixture thereof, or the like.
- a cathode material for example, alkali metals such as lithium and cesium, alkaline earth metals such as magnesium, calcium and strontium, alloys containing these metals (for example, MgAg, AlLi), europium (Eu), ytterbium Examples thereof include rare earth metals such as (Yb) and alloys containing the rare earth metals.
- a vacuum evaporation method or a sputtering method can be used.
- a silver paste a coating method, an inkjet method, or the like can be used.
- a cathode is formed using various conductive materials such as Al, Ag, ITO, graphene, indium oxide-tin oxide containing silicon or silicon oxide regardless of the size of work function Can. These conductive materials can be deposited by a sputtering method, an inkjet method, a spin coating method, or the like.
- a pixel defect due to a leak or a short circuit is likely to occur because an electric field is applied to the ultrathin film.
- a thin film insulating layer may be inserted between the pair of electrodes.
- a material used for the insulating layer for example, aluminum oxide, lithium fluoride, lithium oxide, cesium fluoride, cesium oxide, magnesium oxide, magnesium fluoride, calcium oxide, calcium fluoride, aluminum nitride, titanium oxide, silicon oxide And germanium oxide, silicon nitride, boron nitride, molybdenum oxide, ruthenium oxide, vanadium oxide and the like. A mixture of these may be used, or a laminate of multiple layers containing these materials may be used.
- the space layer is, for example, in the case where a fluorescent light emitting layer and a phosphorescent light emitting layer are stacked, in order to prevent the excitons generated in the phosphorescent light emitting layer from diffusing into the fluorescent light emitting layer or to adjust the carrier balance. It is a layer provided between the fluorescent light emitting layer and the phosphorescent light emitting layer.
- the space layer can also be provided between a plurality of phosphorescent light emitting layers. Since the space layer is provided between the light emitting layers, the space layer is preferably formed of a material having both electron transportability and hole transportability. Further, in order to prevent the diffusion of triplet energy in the adjacent phosphorescent light emitting layer, the triplet energy is preferably 2.6 eV or more.
- a material used for a space layer the thing similar to the thing used for the above-mentioned hole transport layer is mentioned.
- a blocking layer such as an electron blocking layer, a hole blocking layer, or a triplet blocking layer may be provided in a portion adjacent to the light emitting layer.
- the electron blocking layer is a layer that prevents electrons from leaking from the light emitting layer to the hole transporting layer
- the hole blocking layer is a layer that prevents holes from leaking from the light emitting layer to the electron transporting layer.
- the triplet blocking layer prevents the excitons generated in the light emitting layer from diffusing to the adjacent layer, and has a function of confining the exciton in the light emitting layer.
- Each layer of the organic EL element can be formed by a conventionally known vapor deposition method, coating method or the like.
- it may be formed by a known vapor deposition method such as vacuum vapor deposition method or molecular beam vapor deposition method (MBE method) or a known coating method such as dipping method, spin coating method, casting method, bar coating method, roll coating method it can.
- a known vapor deposition method such as vacuum vapor deposition method or molecular beam vapor deposition method (MBE method)
- MBE method molecular beam vapor deposition method
- a known coating method such as dipping method, spin coating method, casting method, bar coating method, roll coating method it can.
- the film thickness of each layer is not particularly limited, but in general, when the film thickness is too thin, defects such as pinholes easily occur. Conversely, when it is too thick, a high drive voltage is required and the efficiency is deteriorated. It is more preferable that it is 0.2 ⁇ m.
- the organic EL element can be used for display components such as an organic EL panel module, display devices such as a television, a mobile phone, and a personal computer, and electronic devices such as lighting and light emitting devices of vehicle lamps.
- Synthesis Example 1 Synthesis of Compound 1 Under an argon atmosphere, aniline (690 mL), Intermediate A (6.0 g) and toluene (73 mL) were charged. Tris (dibenzylideneacetone) palladium (0) (0.2 g) was added and heated to 80.degree. Thereto t-Bu 3 P-HBF 4 (0.13 g) and t-BuONa (1.67 g) were sequentially added, and the mixture was stirred at 100 ° C. for 24 hours. After methanol was added at room temperature, DME was added and washed while heating and heating to 100 ° C. The obtained residue was purified by column chromatography to obtain compound 1 (3.6 g, yield 65%). As a result of mass spectrum analysis, m / e was 753 with respect to the molecular weight 753 of the compound 1.
- Synthesis Example 2 Synthesis of Compound 2 Compound 2 was obtained in the same manner using biphenyl-4-amine instead of aniline in the synthesis of Compound 1. As a result of mass spectrum analysis, m / e was 829 relative to the molecular weight 829 of compound 2.
- Synthesis Example 3 Synthesis of Compound 3 Compound 3 was obtained in a similar manner using biphenyl-3-amine in place of aniline in the synthesis of Compound 1. As a result of mass spectrum analysis, m / e was 829 with respect to the molecular weight 829 of the compound 3.
- Synthesis Example 6 Synthesis of Compound 6
- the compound 6 was obtained in the same manner using [1,1 ′: 4 ′, 1 ′ ′-terphenyl] -2-amine instead of aniline in the synthesis of the compound 1.
- Synthesis Example 9 Synthesis of Compound 9 Compound 9 was obtained in a similar manner using 4- (dibenzo [b, d] thiophen-4-yl) aniline instead of aniline in the synthesis of compound 1. As a result of mass spectrum analysis, m / e was 935 with respect to the molecular weight 935 of compound 9.
- Synthesis Example 10 Synthesis of Compound 10 Compound 10 was obtained in a similar manner using 4- (dibenzo [b, d] thiophen-2-yl) aniline instead of aniline in the synthesis of compound 1. As a result of mass spectrum analysis, m / e was 935 with respect to the molecular weight 935 of the compound 10.
- Synthesis Example 13 Synthesis of Compound 13 Compound 13 was obtained in the same manner using dibenzo [b, d] thiophene-4-amine instead of aniline in the synthesis of compound 1. As a result of mass spectrum analysis, m / e was 859 relative to the molecular weight of 859 of compound 13.
- Synthesis Example 14 Synthesis of Compound 14 Compound 14 was obtained in the same manner using dibenzo [b, d] thiophene-2-amine instead of aniline in the synthesis of compound 1. As a result of mass spectrum analysis, m / e was 859 relative to the molecular weight of 859 of the compound 14.
- Synthesis Example 16 Synthesis of Compound 16 Compound 16 was obtained in a similar manner using 9,9-diphenyl-9H-fluoren-2-amine instead of aniline in the synthesis of Compound 1. As a result of mass spectrum analysis, m / e was 993 with respect to the molecular weight of compound 16 of 993.
- Synthesis Example 17 Synthesis of Compound 17 Compound 17 was obtained in the same manner using 9,9′-spirobi [fluorene] -2-amine instead of aniline in the synthesis of compound 1. As a result of mass spectrum analysis, m / e was 991 with respect to the molecular weight of Compound 17 of 991.
- Synthesis Example 19 Synthesis of Compound 19 Compound 19 was obtained in a similar manner using 4- (naphthalen-1-yl) aniline instead of aniline in the synthesis of compound 1. As a result of mass spectrum analysis, m / e was 879 relative to a molecular weight of 879 of compound 19.
- Synthesis Example 20 Synthesis of Compound 20 Compound 20 was obtained in a similar manner using phenanthrene-2-amine instead of aniline in the synthesis of Compound 1. As a result of mass spectrum analysis, m / e was 853 with respect to the molecular weight 853 of the compound 20.
- Synthesis Example 22 Synthesis of Compound 22 In the synthesis of Compound 4, Compound 22 was obtained in a similar manner, using Intermediate B instead of Intermediate A. As a result of mass spectrum analysis, m / e was 829 relative to the molecular weight 829 of compound 22.
- Synthesis Example 28 Synthesis of Compound 28 Compound 28 was obtained in the same manner, using Intermediate G instead of Intermediate A and 2-bromobiphenyl instead of Intermediate D in the synthesis of Intermediate F. As a result of mass spectrum analysis, m / e was 829 with respect to the molecular weight 829 of the compound 28.
- Synthesis Example 29 Synthesis of Compound 29 In the synthesis of Intermediate F, Compound 29 was obtained in the same manner, using Intermediate G instead of Intermediate A and 2-bromo-9,9-dimethylfluorene instead of Intermediate D. As a result of mass spectrum analysis, m / e was 869 relative to the molecular weight 869 of compound 29.
- Synthesis Example 30 Synthesis of Compound 30 Compound 30 was obtained in a similar manner using Intermediate H instead of Intermediate A and 4-bromobiphenyl instead of Intermediate D in the synthesis of Intermediate F. As a result of mass spectrum analysis, m / e was 829 relative to the molecular weight 829 of compound 30.
- Synthesis Example 31 Synthesis of Compound 31 Compound 31 was obtained in the same manner, using Intermediate H instead of Intermediate A and 2-bromobiphenyl instead of Intermediate D in the synthesis of Intermediate F. As a result of mass spectrum analysis, m / e was 829 relative to the molecular weight 829 of compound 31.
- Example 1 Preparation of organic EL device A glass substrate (made by Geomatic) with a 25 mm ⁇ 75 mm ⁇ 1.1 mm ITO transparent electrode (anode) is subjected to ultrasonic cleaning for 5 minutes in isopropyl alcohol, and then UV ozone cleaning is performed for 30 minutes. The The film thickness of ITO was 130 nm. The cleaned glass substrate with a transparent electrode was mounted on a substrate holder of a vacuum deposition apparatus. First, the compound HA was vapor-deposited on the surface on which the transparent electrode was formed so as to cover the transparent electrode to form a hole injection layer with a film thickness of 5 nm.
- Compound 2 was vapor-deposited on the hole injection layer to form a first hole transport layer with a thickness of 80 nm.
- the compound HT2 was vapor-deposited on the first hole transport layer to form a 10-nm-thick second hole transport layer.
- a compound BH (host material) and a compound BD (dopant material) were co-evaporated on the second hole transport layer to form a light emitting layer with a film thickness of 25 nm.
- the mass ratio of the compound BH to the compound BD contained in the light emitting layer was 96: 4.
- the compound ET1 was vapor deposited to form a first electron transporting layer having a thickness of 10 nm, and then the compound ET2 was vapor deposited to form a second electron transporting layer having a thickness of 15 nm.
- LiF was vapor-deposited on the second electron transport layer to form an electron injection layer with a thickness of 1 nm.
- Metal Al was vapor-deposited on this electron injection layer to form a metal cathode having a film thickness of 80 nm, and an organic EL device was produced.
- Driving Voltage A voltage (unit: V) was measured when a voltage was applied to the organic EL element such that the current density was 10 mA / cm 2 .
- the obtained organic EL device is DC constant current driven at a current density of 10 mA / cm 2 at room temperature, and the external quantum efficiency (%) is measured by a luminance meter (spectral luminance radiometer CS-1000 manufactured by Minolta). It measured using. The results are shown in Table 1.
- Example 2 and Comparative Example 1 An organic EL device is manufactured in the same manner as in Example 1 except that Compound 15 and Comparative Compound 1 (the compound described in Patent Document 1) are used instead of Compound 2, and the driving voltage and external quantum of the organic EL device are produced. The efficiency was measured as in Example 1. The results are shown in Table 1.
- Example 3 Preparation of organic EL device A glass substrate (made by Geomatic) with a 25 mm ⁇ 75 mm ⁇ 1.1 mm ITO transparent electrode (anode) is subjected to ultrasonic cleaning for 5 minutes in isopropyl alcohol, and then UV ozone cleaning is performed for 30 minutes.
- the film thickness of ITO was 130 nm.
- the cleaned glass substrate with a transparent electrode was mounted on a substrate holder of a vacuum deposition apparatus.
- the compound HA was vapor-deposited on the surface on which the transparent electrode was formed so as to cover the transparent electrode to form a hole injection layer with a film thickness of 5 nm.
- the compound HT1 was vapor-deposited on the hole injection layer to form a first hole transport layer having a thickness of 80 nm.
- Compound 27 was vapor-deposited on the first hole transport layer to form a second hole transport layer with a thickness of 10 nm.
- a compound BH (host material) and a compound BD (dopant material) were co-evaporated on the second hole transport layer to form a light emitting layer with a film thickness of 25 nm.
- the mass ratio of the compound BH to the compound BD contained in the light emitting layer was 96: 4.
- the compound ET1 was vapor deposited to form a first electron transporting layer having a thickness of 10 nm, and then the compound ET2 was vapor deposited to form a second electron transporting layer having a thickness of 15 nm.
- LiF was vapor-deposited on the second electron transport layer to form an electron injection layer with a thickness of 1 nm.
- Metal Al was vapor-deposited on this electron injection layer to form a metal cathode having a film thickness of 80 nm, and an organic EL device was produced.
- Measurement of Element Performance The driving voltage and external quantum efficiency of the obtained organic EL element were measured in the same manner as in Example 1. The results are shown in Table 2.
- Comparative example 2 An organic EL device was manufactured in the same manner as in Example 1 except that the comparative compound 1 was used instead of the compound 27, and the driving voltage and the external quantum efficiency of the organic EL device were measured in the same manner as in Example 1. The results are shown in Table 2.
- the compound of the present invention having two spiro (xanthene fluorene) skeletons is higher than the comparative compound having only one spiro (xanthene fluorene) skeleton. It can be seen that an organic EL device exhibiting external quantum efficiency is provided.
- the excellent effect of the compound of the present invention is that the unpaired electron of the two oxygen atoms of the spiro (xanthene fluorene) skeleton facilitates carrier transfer, and the obtained good carrier mobility increases the amount of carriers in the light emitting layer. As a result, it is thought that it originates in efficiency becoming high.
- organic EL element 2 substrate 3 anode 4 cathode 5 light emitting layer 6 hole transport zone (hole transport layer) 6a first hole transport layer 6b second hole transport layer 7 electron transport zone (electron transport layer) 7a first electron transport layer 7b second electron transport layer 10, 20 light emitting unit
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Abstract
Description
(式中、
R1~R8、R11~R18、R21~R28、及びR31~R38は、それぞれ独立して水素原子、置換もしくは無置換の炭素数1~30のアルキル基、置換もしくは無置換の環形成炭素数3~30のシクロアルキル基、置換もしくは無置換の環形成炭素数6~30のアリール基、置換もしくは無置換の環形成原子数5~30のヘテロアリール基、置換もしくは無置換の炭素数7~36のアラルキル基、置換もしくは無置換の炭素数1~30のアルコキシ基、置換もしくは無置換の環形成炭素数6~30のアリールオキシ基、置換もしくは無置換の炭素数1~30のアルキル基及び置換もしくは無置換の環形成炭素数6~30のアリール基から選ばれる置換基を有するモノ、ジ又はトリ置換シリル基、置換もしくは無置換の炭素数1~30ハロアルキル基、置換もしくは無置換の炭素数1~30のハロアルコキシ基、ハロゲン原子、シアノ基、又はニトロ基である。
R1~R4から選ばれる隣接する2つ、R5~R8から選ばれる隣接する2つ、R11~R14から選ばれる隣接する2つ、R15~R18から選ばれる隣接する2つ、R21~R24から選ばれる隣接する2つ、R25~R28から選ばれる隣接する2つ、R31~R34から選ばれる隣接する2つ、及び、R35~R38から選ばれる隣接する2つは互いに結合して環構造を形成してもよい。
ただし、R1~R8及びR11~R18から選ばれる1つが*1に結合する単結合を表すか、又は、R1~R4から選ばれる隣接する2つ、R5~R8から選ばれる隣接する2つ、R11~R14から選ばれる隣接する2つ、又はR15~R18から選ばれる隣接する2つが形成する前記環構造の環形成原子が*1に結合し;
R21~R28及びR31~R38から選ばれる1つが*2に結合する単結合を表すか、又は、R21~R24から選ばれる隣接する2つ、R25~R28から選ばれる隣接する2つ、R31~R34から選ばれる隣接する2つ、又はR35~R38から選ばれる隣接する2つが形成する前記環構造の環形成原子が*2に結合する。
Xは酸素原子又は硫黄原子を表す。
Yは酸素原子又は硫黄原子を表す。
L1、L2、及びL3はそれぞれ独立して単結合、置換もしくは無置換の環形成炭素数6~30のアリーレン基、又は置換もしくは無置換の環形成原子数5~30のヘテロアリーレン基である。
Arは置換もしくは無置換の環形成炭素数6~30のアリール基、置換もしくは無置換の環形成原子数5~30の窒素含有ヘテロアリール基、置換もしくは無置換の環形成原子数5~30の酸素含有ヘテロアリール基、又は置換もしくは無置換の環形成原子数5~30の硫黄含有ヘテロアリール基である。
「置換もしくは無置換」というときの任意の置換基は、炭素数1~30のアルキル基、環形成炭素数3~30のシクロアルキル基、環形成炭素数6~30のアリール基、環形成原子数5~30ヘテロアリール基、置換もしくは無置換の炭素数7~36アラルキル基、炭素数1~30のアルコキシ基、環形成炭素数6~30のアリールオキシ基、炭素数1~30のアルキル基及び環形成炭素数6~30アリール基から選ばれる置換基を有するモノ、ジ又はトリ置換シリル基、炭素数1~30のハロアルキル基、炭素数1~30のハロアルコキシ基、ハロゲン原子、シアノ基、及びニトロ基からなる群より選ばれる。)
前記置換アリール基としては、例えば、9,9-ジメチルフルオレニル基、9,9-ジフェニルフルオレニル基、及び9,9’-スピロビフルオレニル基が好ましい。
該ヘテロアリール基は、例えば、ピロリル基、イミダゾリル基、ピラゾリル基、トリアゾリル基、フリル基、チエニル基、オキサゾリル基、イソオキサゾリル基、オキサジアゾリル基、チアゾリル基、イソチアゾリル基、チアジアゾリル基、ピリジル基、ピリダジニル基、ピリミジニル基、ピラジニル基、トリアジニル基、インドリル基、イソインドリル基、インドリジニル基、キノリジニル基、キノリル基、イソキノリル基、シンノリル基、フタラジニル基、キナゾリニル基、キノキサリニル基、ベンゾイミダゾリル基、インダゾリル基、フェナントロリニル基、フェナントリジニル基、アクリジニル基、フェナジニル基、カルバゾリル基、ベンゾカルバゾリル基、キサンテニル基、ベンゾフラニル基、イソベンゾフラニル基、ジベンゾフラニル基、ナフトベンゾフラニル基、ベンゾチオフェニル基(ベンゾチエニル基、以下同様)、ジベンゾチオフェニル基(ジベンゾチエニル基、以下同様)、又はナフトベンゾチオフェニル基(ナフトベンゾチエニル基、以下同様)であり;好ましくは、フリル基、チエニル基、ピリジル基、ピリダジニル基、ピリミジニル基、ピラジニル基、トリアジニル基、ベンゾフラニル基、ベンゾチオフェニル基、ジベンゾフラニル基、ナフトベンゾフラニル基、ジベンゾチオフェニル基、ナフトベンゾチオフェニル基、カルバゾリル基、又はベンゾカルバゾリル基であり;より好ましくは、チエニル基、ベンゾチオフェニル基、ジベンゾフラニル基、ナフトベンゾフラニル基、ジベンゾチオフェニル基、ナフトベンゾチオフェニル基、カルバゾリル基、又はベンゾカルバゾリル基である。
前記置換ヘテロアリール基としては、例えば、9-フェニルカルバゾリル基、9-ビフェニリルカルバゾリル基、9-フェニルフェニルカルバゾリル基、9-ナフチルカルバゾリル基、ジフェニルカルバゾール-9-イル基、フェニルジベンゾフラニル基、及びフェニルジベンゾチオフェニル基(フェニルジベンゾチエニル基)が好ましい。
該ハロアルキル基は炭素数1~30、好ましくは1~18、より好ましくは1~8のフルオロアルキル基が好ましく、ヘプタフルオロプロピル基(異性体基を含む)、ペンタフルオロエチル基、2,2,2-トリフルオロエチル基、及びトリフルオロメチル基がより好ましく、ペンタフルオロエチル基、2,2,2-トリフルオロエチル基、及びトリフルオロメチル基がさらに好ましく、トリフルオロメチル基が特に好ましい。
(式中、ZはX又はYであり、*は、ベンゼン環の炭素原子又は前記環構造A、B、又はCの環形成原子が*1又は*2に結合することを表し、簡略化のために省略した各Rは式(1)において定義したとおりである。)
本発明の一態様において、*2に結合する単結合を表さず、かつ、前記環構造を形成しないR21~R28及びR31~R38はすべて水素原子であってもよい。
本発明の他の態様において、R21~R28及びR31~R38から選ばれる1つが*2に結合する単結合であり、残りのすべてが水素原子であってもよい。
(式中、ZはX又はYであり、ベンゼン環の炭素原子又は環構造a、b、c、d、e、又はfの環形成原子が*1又は*2に結合する。簡略化のために省略した各Rは式(1)で定義したとおりである。)
さらに好ましくは下記式から選ばれる基であり;
さらに好ましくはo-フェニレン基、m-フェニレン基、p-フェニレン基、4,4’-ビフェニリレン基、4,3’-ビフェニリレン基、又は4,2’-ビフェニリレン基であり;さらに好ましくはo-フェニレン基、m-フェニレン基、又はp-フェニレン基であり;特に好ましくはp-フェニレン基である。
置換アリーレン基としては、9,9-ジメチルフルオレンジイル基、9,9-ジフェニルフルオレンジイル基、及び9,9’-スピロビフルオレンジイル基が好ましい。
該ヘテロアリーレン基としては、例えば、ピロール、イミダゾール、ピラゾール、トリアゾール、フラン、チオフェン、オキサゾール、イソオキサゾール、オキサジアゾール、チアゾール、イソチアゾール、チアジアゾール、ピリジン、ピリダジン、ピリミジン、ピラジン、トリアジン、インドール、イソインドール、インドリジン、キノリジン、キノリン、イソキノリン、シンノリン、フタラジン、キナゾリン、キノキサリン、ベンゾイミダゾール、インダゾール、フェナントロリン、フェナントリジン、アクリジン、フェナジン、カルバゾール、ベンゾカルバゾール、キサンテン、ベンゾフラン、イソベンゾフラン、ジベンゾフラン、ナフトベンゾフラン、ベンゾチオフェン、ジベンゾチオフェン、ナフトベンゾチオフェン、ベンゾオキサゾール、ベンゾイソキサゾール、フェノキサジン、ベンゾチアゾール、ベンゾイソチアゾール、及びフェノチアジンから選ばれる芳香族複素環の2価の残基が挙げられ;好ましくはピリジン、ピリミジン、トリアジン、インドール、キノリン、キナゾリン、キノキサリン、ベンゾイミダゾール、インダゾール、フェナントロリン、フェナントリジン、アクリジン、カルバゾール、ベンゾカルバゾール、ベンゾフラン、ジベンゾフラン、ナフトベンゾフラン、ベンゾチオフェン、ジベンゾチオフェン、ナフトベンゾチオフェン、及びベンゾオキサゾールから選ばれる芳香族複素環の2価の残基であり;より好ましくはピリジン、ピリミジン、トリアジン、カルバゾール、ベンゾカルバゾール、ベンゾフラン、ジベンゾフラン、ナフトベンゾフラン、ベンゾチオフェン、及びジベンゾチオフェンから選ばれる芳香族複素環の2価の残基である。
さらに好ましくは下記式から選ばれる基であり;
さらに好ましくはo-フェニレン基、m-フェニレン基、p-フェニレン基、4,4’-ビフェニリレン基、4,3’-ビフェニリレン基、4,2’-ビフェニリレン基、1,4-ナフチレン基、又は2,6-ナフチレン基であり;さらに好ましくはo-フェニレン基、m-フェニレン基、p-フェニレン基、1,4-ナフチレン基、又は2,6-ナフチレン基であり;特に好ましくはp-フェニレン基である。
置換アリーレン基としては、9,9-ジメチルフルオレンジイル基、9,9-ジフェニルフルオレンジイル基、及び9,9’-スピロビフルオレンジイル基が好ましい。
該ヘテロアリーレン基としては、例えば、ピロール、イミダゾール、ピラゾール、トリアゾール、フラン、チオフェン、オキサゾール、イソオキサゾール、オキサジアゾール、チアゾール、イソチアゾール、チアジアゾール、ピリジン、ピリダジン、ピリミジン、ピラジン、トリアジン、インドール、イソインドール、インドリジン、キノリジン、キノリン、イソキノリン、シンノリン、フタラジン、キナゾリン、キノキサリン、ベンゾイミダゾール、インダゾール、フェナントロリン、フェナントリジン、アクリジン、フェナジン、カルバゾール、ベンゾカルバゾール、キサンテン、ベンゾフラン、イソベンゾフラン、ジベンゾフラン、ナフトベンゾフラン、ベンゾチオフェン、ジベンゾチオフェン、ナフトベンゾチオフェン、ベンゾオキサゾール、ベンゾイソキサゾール、フェノキサジン、ベンゾチアゾール、ベンゾイソチアゾール、及びフェノチアジンから選ばれる芳香族複素環の2価の残基が挙げられ;好ましくはピリジン、ピリミジン、トリアジン、インドール、キノリン、キナゾリン、キノキサリン、ベンゾイミダゾール、インダゾール、フェナントロリン、フェナントリジン、アクリジン、カルバゾール、ベンゾカルバゾール、ベンゾフラン、ジベンゾフラン、ナフトベンゾフラン、ベンゾチオフェン、ジベンゾチオフェン、ナフトベンゾチオフェン、及びベンゾオキサゾールから選ばれる芳香族複素環の2価の残基であり;より好ましくはピリジン、ピリミジン、トリアジン、カルバゾール、ベンゾカルバゾール、ベンゾフラン、ジベンゾフラン、ナフトベンゾフラン、ベンゾチオフェン、及びジベンゾチオフェンから選ばれる芳香族複素環の2価の残基である。
本発明の一態様において、Arは置換もしくは無置換の環形成炭素数6~30のアリール基、置換もしくは無置換の環形成原子数5~30の酸素含有ヘテロアリール基、又は、置換もしくは無置換の環形成原子数5~30の硫黄含有ヘテロアリール基であることが好ましい
本発明の他の態様において、Arは置換もしくは無置換の環形成原子数5~30の窒素含有ヘテロアリール基であることが好ましい。
本発明の他の態様において、Arは置換もしくは無置換の環形成原子数5~30の酸素含有ヘテロアリール基であることが好ましい。
本発明のさらに他の態様において、Arは置換もしくは無置換の環形成原子数5~30の硫黄含有ヘテロアリール基であることが好ましい。
置換アリール基は、好ましくは9,9’-スピロビフルオレニル基、9,9-ジフェニルフルオレニル基、又は9,9-ジメチルフルオレニル基であり、より好ましくは、9,9’-スピロビフルオレン-2-イル基、9,9’-スピロビフルオレン-4-イル基、9,9-ジフェニルフルオレン-2-イル基、9,9-ジフェニルフルオレン-4-イル基、9,9-ジメチルフルオレン-2-イル基、又は9,9-ジメチルフルオレン-4-イル基である。
上記任意の置換基の詳細は、R1~R8、R11~R18、R21~R28、及びR31~R38に関して記載した対応する基と同様である。特に断らない限り、隣接する任意の置換基同士が結合して環を形成していてもよい。
本発明の有機EL素子用材料は、化合物(1)を含む。本発明の有機EL素子用材料における化合物(1)の含有量は、特に制限されず、例えば、1質量%以上(100%を含む)であればよく、10質量%以上(100%を含む)であることが好ましく、50質量%以上(100%を含む)であることがより好ましく、80質量%以上(100%を含む)であることがさらに好ましく、90質量%以上(100%を含む)であることが特に好ましい。本発明の有機EL素子用材料は、有機EL素子の製造に有用である。
次に、本発明の有機EL素子について説明する。
有機EL素子は、陰極と陽極の間に有機層を有する。該有機層は発光層を含み、該有機層の少なくとも一層が化合物(1)を含む。
化合物(1)が含まれる有機層の例としては、陽極と発光層との間に設けられる正孔輸送帯域(正孔輸送層、正孔注入層、電子阻止層、励起子阻止層等)、発光層、スペース層、陰極と発光層との間に設けられる電子輸送帯域(電子輸送層、電子注入層、正孔阻止層等)等が挙げられるが、これらに限定されるものではない。化合物(1)は蛍光又は燐光EL素子の正孔輸送帯域又は発光層の材料、好ましくは正孔輸送帯域の材料、より好ましくは正孔輸送層の材料として用いられる。
(1)陽極/発光ユニット/陰極
上記発光ユニットは、燐光発光層や蛍光発光層を複数有する積層型であってもよく、その場合、燐光発光層で生成された励起子が蛍光発光層に拡散することを防ぐためのスペース層を各発光層の間に有していてもよい。シンプル型発光ユニットの代表的な層構成を以下に示す。括弧内の層は任意である。
(a)(正孔注入層/)正孔輸送層/蛍光発光層(/電子輸送層/電子注入層)
(b)(正孔注入層/)正孔輸送層/燐光発光層(/電子輸送層/電子注入層)
(c)(正孔注入層/)正孔輸送層/第一蛍光発光層/第二蛍光発光層(/電子輸送層/電子注入層)
(d)(正孔注入層/)正孔輸送層/第一燐光発光層/第二燐光発光層(/電子輸送層/電子注入層)
(e)(正孔注入層/)正孔輸送層/燐光発光層/スペース層/蛍光発光層(/電子輸送層/電子注入層)
(f)(正孔注入層/)正孔輸送層/第一燐光発光層/第二燐光発光層/スペース層/蛍光発光層(/電子輸送層/電子注入層)
(g)(正孔注入層/)正孔輸送層/第一燐光発光層/スペース層/第二燐光発光層/スペース層/蛍光発光層(/電子輸送層/電子注入層)
(h)(正孔注入層/)正孔輸送層/燐光発光層/スペース層/第一蛍光発光層/第二蛍光発光層(/電子輸送層/電子注入層)
(i)(正孔注入層/)正孔輸送層/電子阻止層/蛍光発光層(/電子輸送層/電子注入層)
(j)(正孔注入層/)正孔輸送層/電子阻止層/燐光発光層(/電子輸送層/電子注入層)
(k)(正孔注入層/)正孔輸送層/励起子阻止層/蛍光発光層(/電子輸送層/電子注入層)
(l)(正孔注入層/)正孔輸送層/励起子阻止層/燐光発光層(/電子輸送層/電子注入層)
(m)(正孔注入層/)第一正孔輸送層/第二正孔輸送層/蛍光発光層(/電子輸送層/電子注入層)
(n)(正孔注入層/)第一正孔輸送層/第二正孔輸送層/蛍光発光層(/第一電子輸送層/第二電子輸送層/電子注入層)
(o)(正孔注入層/)第一正孔輸送層/第二正孔輸送層/燐光発光層(/電子輸送層/電子注入層)
(p)(正孔注入層/)第一正孔輸送層/第二正孔輸送層/燐光発光層(/第一電子輸送層/第二電子輸送層/電子注入層)
(q)(正孔注入層/)正孔輸送層/蛍光発光層/正孔阻止層(/電子輸送層/電子注入層/電子注入層)
(r)(正孔注入層/)正孔輸送層/燐光発光層/正孔阻止層(/電子輸送層/電子注入層)
(s)(正孔注入層/)正孔輸送層/蛍光発光層/トリプレット阻止層(/電子輸送層/電子注入層)
(t)(正孔注入層/)正孔輸送層/燐光発光層/トリプレット阻止層(/電子輸送層/電子注入層)
なお、各発光層と正孔輸送層又はスペース層との間には、電子阻止層を設けてもよい。また、各発光層と電子輸送層との間には、正孔阻止層を設けてもよい。電子阻止層や正孔阻止層を設けることで、電子又は正孔を発光層内に閉じ込めて、発光層における電荷の再結合確率を高め、発光効率を向上させることができる。
(2)陽極/第一発光ユニット/中間層/第二発光ユニット/陰極
ここで、上記第一発光ユニット及び第二発光ユニットは、例えば、それぞれ独立に上述の発光ユニットから選択することができる。
上記中間層は、一般的に、中間電極、中間導電層、電荷発生層、電子引抜層、接続層、中間絶縁層とも呼ばれ、第一発光ユニットに電子を、第二発光ユニットに正孔を供給する層であり、公知の材料により形成することができる。
図2は、図1の正孔輸送帯域6と電子輸送帯域7をそれぞれ2層構造にした例である。陽極側の正孔輸送帯域6aを第1正孔輸送層、陰極側の正孔輸送帯域6bを第2正孔輸送層と称することもある。陽極側の電子輸送帯域7aを第1電子輸送層、陰極層側の正孔輸送帯域7bを第2正孔輸送層と称することもある。
基板は、発光素子の支持体として用いられる。基板の材料としては、例えば、ガラス、石英、プラスチックなどを用いることができる。また、可撓性基板を用いてもよい。可撓性基板としては、例えば、ポリカーボネート、ポリアリレート、ポリエーテルスルフォン、ポリプロピレン、ポリエステル、ポリフッ化ビニル、又はポリ塩化ビニルからなるプラスチック基板、無機蒸着フィルムなどが挙げられる。
基板上に形成される陽極には、仕事関数の大きい(例えば、4.0eV以上)金属、合金、電気伝導性化合物、およびこれらの混合物などを用いることが好ましい。例えば、酸化インジウム-酸化スズ(ITO:Indium Tin Oxide);珪素若しくは酸化珪素を含有した酸化インジウム-酸化スズ;酸化インジウム-酸化亜鉛;酸化タングステン及び酸化亜鉛を含有した酸化インジウム;グラフェン等が挙げられる。この他、金、白金、ニッケル、タングステン、クロム、モリブデン、鉄、コバルト、銅、パラジウム、チタン、及び前記金属の窒化物(例えば、窒化チタン)等が挙げられる。
仕事関数の小さい材料、例えば、リチウム、セシウム等のアルカリ金属、マグネシウム、カルシウム、ストロンチウム等のアルカリ土類金属、これらの金属を含む合金(例えば、MgAg、AlLi)、ユーロピウム、イッテルビウム等の希土類金属、希土類金属を含む合金等を陽極材料として用いることもできる。アルカリ金属、アルカリ土類金属、又はこれらの金属を含む合金を用いて陽極を形成する場合には、真空蒸着法やスパッタリング法を用いることができる。さらに、銀ペーストなどを用いる場合には、塗布法やインクジェット法などを用いることができる。
正孔注入層は、正孔注入性の高い材料(正孔注入性材料)を含む層である。
R27としては、メチル基、エチル基、n-プロピル基、イソプロピル基、n-ブチル基、イソブチル基、t-ブチル基、シクロペンチル基、シクロヘキシル基等が挙げられる。
Rは、それぞれ独立に、水素原子、ハロゲン原子、ヒドロキシル基、シアノ基、置換もしくは無置換の炭素数1~30のアルキル基、置換もしくは無置換の環形成炭素数6~30のアリール基、置換もしくは無置換の炭素数1~30のアルキル基及び置換もしくは無置換の環形成炭素数6~30のアリール基から選ばれる置換基を有するモノ置換、ジ置換又はトリ置換シリル基、置換もしくは無置換の炭素数1~30のアルキル基を有するアルコキシ基、置換もしくは無置換の環形成炭素数6~30のアリール基を有するアリールオキシ基、置換もしくは無置換の炭素数1~30のアルキル基及び置換もしくは無置換の環形成炭素数6~30のアリール基から選ばれる置換基を有するモノ置換又はジ置換アミノ基、置換もしくは無置換の炭素数1~30のアルキル基を有するアルキルチオ基、置換もしくは無置換の環形成炭素数6~30のアリール基を有するアリールチオ基、又は置換もしくは無置換の環形成原子数5~30のヘテロアリール基である。
上記アルキル基、アリール基、及びヘテロアリール基の詳細は、「置換もしくは無置換」というときの任意の置換基に関して記載した対応する基とそれぞれ同じである。
正孔輸送層は、正孔輸送性の高い材料(正孔輸送性材料)を含む層である。本発明の化合物(1)を単独又は下記の化合物と組み合わせて正孔輸送層に用いることが好ましい。
本発明の一態様においては、化合物(1)が第1正孔輸送層と第2正孔輸送層の一方のみに含まれるのが好ましく、他の態様においては、化合物(1)が第1正孔輸送層のみに含まれるのが好ましく、さらに他の態様においては、化合物(1)が第2正孔輸送層のみに含まれるのが好ましく、さらに他の態様においては、化合物(1)が第1正孔輸送層と第2正孔輸送層の双方に含まれるのが好ましい。
発光層は、発光性の高い材料(ドーパント材料)を含む層であり、種々の材料、例えば、蛍光発光材料及び燐光発光材料をドーパント材料として用いることができる。蛍光発光材料は一重項励起状態から発光する化合物であり、燐光発光材料は三重項励起状態から発光する化合物である。
上述したドーパント材料を他の材料(ホスト材料)に分散させてもよい。ドーパント材料よりも最低空軌道準位(LUMO準位)が高く、最高占有軌道準位(HOMO準位)が低い材料を用いることが好ましい。
(1)アルミニウム錯体、ベリリウム錯体、亜鉛錯体等の金属錯体、
(2)オキサジアゾール誘導体、ベンゾイミダゾール誘導体、フェナントロリン誘導体等の複素環化合物、
(3)カルバゾール誘導体、アントラセン誘導体、フェナントレン誘導体、ピレン誘導体、クリセン誘導体等の縮合芳香族化合物、
(4)トリアリールアミン誘導体、縮合多環芳香族アミン誘導体等の芳香族アミン化合物が使用される。
前記複素環化合物としては、例えば、2-(4-ビフェニリル)-5-(4-tert-ブチルフェニル)-1,3,4-オキサジアゾール(略称:PBD)、1,3-ビス[5-(p-tert-ブチルフェニル)-1,3,4-オキサジアゾール-2-イル]ベンゼン(略称:OXD-7)、3-(4-ビフェニリル)-4-フェニル-5-(4-tert-ブチルフェニル)-1,2,4-トリアゾール(略称:TAZ)、2,2’,2’’-(1,3,5-ベンゼントリイル)トリス(1-フェニル-1H-ベンゾイミダゾール)(略称:TPBI)、バソフェナントロリン(略称:BPhen)、バソキュプロイン(略称:BCP)などが挙げられ、
前記縮合芳香族化合物としては、例えば、9-[4-(10-フェニル-9-アントリル)フェニル]-9H-カルバゾール(略称:CzPA)、3,6-ジフェニル-9-[4-(10-フェニル-9-アントリル)フェニル]-9H-カルバゾール(略称:DPCzPA)、9,10-ビス(3,5-ジフェニルフェニル)アントラセン(略称:DPPA)、9,10-ジ(2-ナフチル)アントラセン(略称:DNA)、2-tert-ブチル-9,10-ジ(2-ナフチル)アントラセン(略称:t-BuDNA)、9,9’-ビアントリル(略称:BANT)、9,9’-(スチルベン-3,3’-ジイル)ジフェナントレン(略称:DPNS)、9,9’-(スチルベン-4,4’-ジイル)ジフェナントレン(略称:DPNS2)、3,3’,3”-(ベンゼン-1,3,5-トリイル)トリピレン(略称:TPB3)、9,10-ジフェニルアントラセン(略称:DPAnth)、6,12-ジメトキシ-5,11-ジフェニルクリセンなどが挙げられ、
前記芳香族アミン化合物としては、例えば、N,N-ジフェニル-9-[4-(10-フェニル-9-アントリル)フェニル]-9H-カルバゾール-3-アミン(略称:CzA1PA)、4-(10-フェニル-9-アントリル)トリフェニルアミン(略称:DPhPA)、N,9-ジフェニル-N-[4-(10-フェニル-9-アントリル)フェニル]-9H-カルバゾール-3-アミン(略称:PCAPA)、N,9-ジフェニル-N-{4-[4-(10-フェニル-9-アントリル)フェニル]フェニル}-9H-カルバゾール-3-アミン(略称:PCAPBA)、N-(9,10-ジフェニル-2-アントリル)-N,9-ジフェニル-9H-カルバゾール-3-アミン(略称:2PCAPA)、4,4’-ビス[N-(1-ナフチル)-N-フェニルアミノ]ビフェニル(略称:NPBまたはα-NPD)、N,N’-ビス(3-メチルフェニル)-N,N’-ジフェニル-[1,1’-ビフェニル]-4,4’-ジアミン(略称:TPD)、4,4’-ビス[N-(9,9-ジメチルフルオレン-2-イル)-N-フェニルアミノ]ビフェニル(略称:DFLDPBi、4,4’-ビス[N-(スピロ-9,9’-ビフルオレン-2-イル)-N―フェニルアミノ]ビフェニル(略称:BSPB)などが挙げられる。
ホスト材料は複数種用いてもよい。
電子輸送層は電子輸送性の高い材料(電子輸送性材料)を含む層である。電子輸送層には、例えば、
(1)アルミニウム錯体、ベリリウム錯体、亜鉛錯体等の金属錯体、
(2)イミダゾール誘導体、ベンゾイミダゾール誘導体、アジン誘導体、カルバゾール誘導体、フェナントロリン誘導体等の芳香族複素環化合物、
(3)高分子化合物を使用することができる。
電子注入層は電子注入性の高い材料(電子注入性材料)を含む層である。電子注入層には、リチウム、セシウム、カルシウム、フッ化リチウム、フッ化セシウム、フッ化カルシウム、リチウム酸化物等のアルカリ金属、アルカリ土類金属、又はそれらの化合物を用いることができる。その他、電子輸送性化合物にアルカリ金属、アルカリ土類金属、又はそれらの化合物を含有させたもの、例えば、Alqにマグネシウムを含有させたもの等を用いてもよい。なお、この場合には、陰極からの電子注入をより効率良く行うことができる。
陰極は、仕事関数の小さい(例えば、3.8eV以下)金属、合金、電気伝導性化合物、およびこれらの混合物などにより形成することが好ましい。このような陰極材料としては、例えば、リチウム、セシウム等のアルカリ金属、マグネシウム、カルシウム、ストロンチウム等のアルカリ土類金属、これらの金属を含む合金(例えば、MgAg、AlLi)、ユーロピウム(Eu)、イッテルビウム(Yb)等の希土類金属、希土類金属を含む合金等が挙げられる。
アルカリ金属、アルカリ土類金属、これらの金属を含む合金を用いて陰極を形成する場合には、真空蒸着法やスパッタリング法を用いることができる。また、銀ペーストを用いる場合には、塗布法やインクジェット法などを用いることができる。
電子注入層を設けることにより、仕事関数の大小に関わらず、Al、Ag、ITO、グラフェン、珪素又は酸化珪素を含有した酸化インジウム-酸化スズ等様々な導電性材料を用いて陰極を形成することができる。これらの導電性材料は、スパッタリング法やインクジェット法、スピンコート法等を用いて成膜することができる。
有機EL素子は、超薄膜に電界を印加するために、リークやショートによる画素欠陥が生じやすい。これを防止するために、一対の電極間に薄膜絶縁層を挿入してもよい。
絶縁層に用いられる材料としては、例えば、酸化アルミニウム、弗化リチウム、酸化リチウム、弗化セシウム、酸化セシウム、酸化マグネシウム、弗化マグネシウム、酸化カルシウム、弗化カルシウム、窒化アルミニウム、酸化チタン、酸化珪素、酸化ゲルマニウム、窒化珪素、窒化ホウ素、酸化モリブデン、酸化ルテニウム、酸化バナジウム等が挙げられる。これらの混合物を用いてもよいし、これらの材料を含む複数の層の積層体にしてもよい。
上記スペース層とは、例えば、蛍光発光層と燐光発光層とを積層する場合に、燐光発光層で生成する励起子を蛍光発光層に拡散させない、あるいは、キャリアバランスを調整する目的で、蛍光発光層と燐光発光層との間に設けられる層である。また、スペース層は、複数の燐光発光層の間に設けることもできる。
スペース層は発光層間に設けられるため、電子輸送性と正孔輸送性を兼ね備える材料で形成することが好ましい。また、隣接する燐光発光層内の三重項エネルギーの拡散を防ぐため、三重項エネルギーが2.6eV以上であることが好ましい。スペース層に用いられる材料としては、上述の正孔輸送層に用いられるものと同様のものが挙げられる。
発光層に隣接する部分に、電子阻止層、正孔阻止層、トリプレット阻止層などの阻止層を設けてもいい。電子阻止層とは発光層から正孔輸送層へ電子が漏れることを防ぐ層であり、正孔阻止層とは発光層から電子輸送層へ正孔が漏れることを防ぐ層である。トリプレット阻止層は発光層で生成した励起子が隣接する層へ拡散することを防止し、励起子を発光層内に閉じ込める機能を有する。
アルゴン雰囲気下、2-ブロモ-9-フルオレノン(5.0g)、フェノール(17.0mL)とメタンスルホン酸(1.85g)を加え、135℃にて13時間加熱攪拌した。室温下、10%水酸化ナトリウム水溶液を滴下し反応混合物を中性にしトルエンにて抽出した。飽和食塩水で洗浄後得られた有機層を減圧下で濃縮した。残渣をカラムクラマトグラフィーにて精製し中間体Aを白色個体として得た(1.68g、収率20%)。マススペクトル分析の結果、中間体Aの分子量410に対し、m/e=410であった。
中間体Aの合成において、2-ブロモ-9-フルオレノンの代わりに3-ブロモ-9-フルオレノンを用いて同様の方法で中間体Bを得た。マススペクトル分析の結果、中間体Bの分子量410に対し、m/e=410であった。
中間体Aの合成において、2-ブロモ-9-フルオレノンの代わりに4-ブロモ-9-フルオレノンを用いて同様の方法で中間体Cを得た。マススペクトル分析の結果、中間体Cの分子量410に対し、m/e=410であった。
アルゴン雰囲気下、中間体B(0.41g)、ビス[トリス(2-メチルフェニル)ホスフィン]パラジウム(1.43mg)、Josiphosリガンド(CyPF-tBu、1.11mg)、t-BuONa(0.43g)、硫酸アンモニウム(0.2g)、無水ジオキサン(5mL)を順次投入し90℃で過熱攪拌した。12時間後、酢酸エチルにて抽出しセライトろ過し溶媒を減圧留去した。これをカラムクロマトグラフィーにて精製し中間体Dを得た(0.18g、収率52%)。マススペクトル分析の結果、中間体Dの分子量347に対し、m/e=347であった。
アルゴン雰囲気下、中間体D(2.54g)、中間体A(3.0g)とトルエン(40mL)を投入した。トリス(ジベンジリデンアセトン)パラジウム(0)(0.1g)を加え80℃に加熱した。そこへt-Bu3P-HBF4(560mg)、t-BuONa(830mg)を順次投入し100℃にて24時間攪拌した。室温でメタノールを加えたあと、DMEを加え攪拌しながら100℃に加熱して洗浄した。得られた残渣をカラムクロマトグラフィーにて精製し中間体Fを得た(2.8g、収率57%)。マススペクトル分析の結果、中間体Fの分子量677に対し、m/e=677であった。
アルゴン雰囲気下、アニリン(690mL)、中間体A(6.0g)とトルエン(73mL)を投入した。トリス(ジベンジリデンアセトン)パラジウム(0)(0.2g)を加え80℃に加熱した。そこへt-Bu3P-HBF4(0.13g)、t-BuONa(1.67g)を順次投入し100℃にて24時間攪拌した。室温でメタノールを加えたあと、DME加え攪拌しながら100℃に加熱して洗浄した。得られた残渣をカラムクロマトグラフィーにて精製し化合物1を得た(3.6g、収率65%)。マススペクトル分析の結果、化合物1の分子量753に対し、m/e=753であった。
化合物1の合成において、アニリンの代わりにビフェニル-4-アミンを用いて同様の方法で化合物2を得た。マススペクトル分析の結果、化合物2の分子量829に対し、m/e=829であった。
化合物1の合成において、アニリンの代わりにビフェニル-3-アミンを用いて同様の方法で化合物3を得た。マススペクトル分析の結果、化合物3の分子量829に対し、m/e=829であった。
化合物1の合成において、アニリンの代わりにビフェニル-2-アミンを用いて同様の方法で化合物4を得た。マススペクトル分析の結果、化合物4の分子量829に対し、m/e=829であった。
化合物1の合成において、アニリンの代わりに[1,1’:4’,1”-ターフェニル]-4-アミンを用いて同様の方法で化合物5を得た。マススペクトル分析の結果、化合物5の分子量905に対し、m/e=905であった。
化合物1の合成において、アニリンの代わりに[1,1’:4’,1”-ターフェニル]-2-アミンを用いて同様の方法で化合物6を得た。マススペクトル分析の結果、化合物6の分子量905に対し、m/e=905であった。
化合物1の合成において、アニリンの代わりに4-(ジベンゾ[b,d]フラン-4-イル)アニリン用いて同様の方法で化合物7を得た。マススペクトル分析の結果、化合物7の分子量919に対し、m/e=919であった。
化合物1の合成において、アニリンの代わりに4-(ジベンゾ[b,d]フラン-2-イル)アニリンを用いて同様の方法で化合物8を得た。マススペクトル分析の結果、化合物8の分子量919に対し、m/e=919であった。
化合物1の合成において、アニリンの代わりに4-(ジベンゾ[b,d]チオフェン-4-イル)アニリンを用いて同様の方法で化合物9を得た。マススペクトル分析の結果、化合物9の分子量935に対し、m/e=935であった。
化合物1の合成において、アニリンの代わりに4-(ジベンゾ[b,d]チオフェン-2-イル)アニリンを用いて同様の方法で化合物10を得た。マススペクトル分析の結果、化合物10の分子量935に対し、m/e=935であった。
化合物1の合成において、アニリンの代わりにジベンゾ[b,d]フラン-4-アミンを用いて同様の方法で化合物11を得た。マススペクトル分析の結果、化合物11の分子量843に対し、m/e=843であった。
化合物1の合成において、アニリンの代わりにジベンゾ[b,d]フラン-2-アミンを用いて同様の方法で化合物12を得た。マススペクトル分析の結果、化合物12の分子量843に対し、m/e=843であった。
化合物1の合成において、アニリンの代わりにジベンゾ[b,d]チオフェン-4-アミンを用いて同様の方法で化合物13を得た。マススペクトル分析の結果、化合物13の分子量859に対し、m/e=859であった。
化合物1の合成において、アニリンの代わりにジベンゾ[b,d]チオフェン-2-アミンを用いて同様の方法で化合物14を得た。マススペクトル分析の結果、化合物14の分子量859に対し、m/e=859であった。
化合物1の合成において、アニリンの代わりに9,9-ジメチル-9H-フルオレン-2-アミンを用いて同様の方法で化合物15を得た。マススペクトル分析の結果、化合物15の分子量869に対し、m/e=869であった。
化合物1の合成において、アニリンの代わりに9,9-ジフェニル-9H-フルオレン-2-アミンを用いて同様の方法で化合物16を得た。マススペクトル分析の結果、化合物16の分子量993に対し、m/e=993であった。
化合物1の合成において、アニリンの代わりに9,9’-スピロビ[フルオレン]-2-アミンを用いて同様の方法で化合物17を得た。マススペクトル分析の結果、化合物17の分子量991に対し、m/e=991であった。
化合物1の合成において、アニリンの代わりにナフタレン-1-アミンを用いて同様の方法で化合物18を得た。マススペクトル分析の結果、化合物18の分子量803に対し、m/e=803であった。
化合物1の合成において、アニリンの代わりに4-(ナフタレン-1-イル)アニリンを用いて同様の方法で化合物19を得た。マススペクトル分析の結果、化合物19の分子量879に対し、m/e=879であった。
化合物1の合成において、アニリンの代わりにフェナントレン-2-アミンを用いて同様の方法で化合物20を得た。マススペクトル分析の結果、化合物20の分子量853に対し、m/e=853であった。
化合物2の合成において、中間体Aの代わりに中間体Bを用いて同様の方法で化合物21を得た。マススペクトル分析の結果、化合物21の分子量829に対し、m/e=829であった。
化合物4の合成において、中間体Aの代わりに中間体Bを用いて同様の方法で化合物22を得た。マススペクトル分析の結果、化合物22の分子量829に対し、m/e=829であった。
化合物2の合成において、中間体Aの代わりに中間体Cを用いて同様の方法で化合物23を得た。マススペクトル分析の結果、化合物23の分子量829に対し、m/e=829であった。
化合物4の合成において、中間体Aの代わりに中間体Cを用いて同様の方法で化合物24を得た。マススペクトル分析の結果、化合物24の分子量829に対し、m/e=829であった。
中間体Fの合成において、中間体Aの代わりに中間体Fを、中間体Dの代わりに4-ブロモビフェニルを用いて同様の方法で化合物25を得た。マススペクトル分析の結果、化合物25の分子量829に対し、m/e=829であった。
中間体Fの合成において、中間体Aの代わりに中間体Fを、中間体Dの代わりに2-ブロモビフェニルを用いて同様の方法で化合物26を得た。マススペクトル分析の結果、化合物26の分子量829に対し、m/e=829であった。
中間体Fの合成において、中間体Aの代わりに中間体Gを、中間体Dの代わりに4-ブロモビフェニルを用いて同様の方法で化合物27を得た。マススペクトル分析の結果、化合物27の分子量829に対し、m/e=829であった。
中間体Fの合成において、中間体Aの代わりに中間体Gを、中間体Dの代わりに2-ブロモビフェニルを用いて同様の方法で化合物28を得た。マススペクトル分析の結果、化合物28の分子量829に対し、m/e=829であった。
中間体Fの合成において、中間体Aの代わりに中間体Gを、中間体Dの代わりに2-ブロモ-9,9-ジメチルフルオレンを用いて同様の方法で化合物29を得た。マススペクトル分析の結果、化合物29の分子量869に対し、m/e=869であった。
中間体Fの合成において、中間体Aの代わりに中間体Hを、中間体Dの代わりに4-ブロモビフェニルを用いて同様の方法で化合物30を得た。マススペクトル分析の結果、化合物30の分子量829に対し、m/e=829であった。
中間体Fの合成において、中間体Aの代わりに中間体Hを、中間体Dの代わりに2-ブロモビフェニルを用いて同様の方法で化合物31を得た。マススペクトル分析の結果、化合物31の分子量829に対し、m/e=829であった。
化合物1の合成において、中間体Aの代わりに中間体Gを、アニリンの代わりに中間体Aを用いて同様の方法で化合物32を得た。マススペクトル分析の結果、化合物32の分子量1007に対し、m/e=1007であった。
化合物1の合成において、アニリンの代わりに9-フェニル-9H-カルバゾール-3-アミンを用いて同様の方法で化合物33を得た。マススペクトル分析の結果、化合物33の分子量918に対し、m/e=918であった。
化合物1の合成において、アニリンの代わりに9-フェニル-9H-カルバゾール-2-アミンを用いて同様の方法で化合物34を得た。マススペクトル分析の結果、化合物34の分子量918に対し、m/e=918であった。
有機EL素子の製造
25mm×75mm×1.1mmのITO透明電極(陽極)付きガラス基板(ジオマティック社製)をイソプロピルアルコール中で超音波洗浄を5分間行なった後、UVオゾン洗浄を30分間行なった。ITOの膜厚は130nmであった。
洗浄後の透明電極付きガラス基板を真空蒸着装置の基板ホルダーに装着した。まず透明電極が形成されている面上に該透明電極を覆うようにして化合物HAを蒸着して膜厚5nmの正孔注入層を形成した。
次に、この正孔注入層の上に、化合物2を蒸着して膜厚80nmの第1正孔輸送層を形成した。
次に、この第1正孔輸送層の上に、化合物HT2を蒸着して膜厚10nmの第2正孔輸送層を形成した。
次に、この第2正孔輸送層の上に、化合物BH(ホスト材料)及び化合物BD(ドーパント材料)を共蒸着により成膜し、膜厚25nmの発光層を形成した。発光層に含まれる化合物BHと化合物BDの質量比は96:4であった。
この発光層の成膜に続けて、化合物ET1を蒸着して膜厚10nmの第1電子輸送層を形成した後、化合物ET2を蒸着して膜厚15nmの第2電子輸送層を形成した。
この第2電子輸送層上にLiFを蒸着して膜厚1nmの電子注入層を形成した。
この電子注入層上に金属Alを蒸着して膜厚80nmの金属陰極を形成し、有機EL素子を作製した。
電流密度が10mA/cm2となるように有機EL素子に電圧を印加したときの電圧(単位:V)を計測した。
得られた有機EL素子を室温下、電流密度10mA/cm2で直流定電流駆動し、外部量子効率(%)を輝度計(ミノルタ社製分光輝度放射計CS-1000)を用いて測定した。結果を表1に示す。
化合物2の代わりに化合物15及び比較化合物1(特許文献1に記載の化合物)をそれぞれ用いた以外は実施例1と同様にして有機EL素子を製造し、該有機EL素子の駆動電圧及び外部量子効率を実施例1と同様にして測定した。結果を表1に示す。
有機EL素子の製造
25mm×75mm×1.1mmのITO透明電極(陽極)付きガラス基板(ジオマティック社製)をイソプロピルアルコール中で超音波洗浄を5分間行なった後、UVオゾン洗浄を30分間行なった。ITOの膜厚は130nmであった。
洗浄後の透明電極付きガラス基板を真空蒸着装置の基板ホルダーに装着した。まず透明電極が形成されている面上に該透明電極を覆うようにして化合物HAを蒸着して膜厚5nmの正孔注入層を形成した。
次に、この正孔注入層の上に、化合物HT1を蒸着して膜厚80nmの第1正孔輸送層を形成した。
次に、この第1正孔輸送層の上に、化合物27を蒸着して膜厚10nmの第2正孔輸送層を形成した。
次に、この第2正孔輸送層の上に、化合物BH(ホスト材料)及び化合物BD(ドーパント材料)を共蒸着により成膜し、膜厚25nmの発光層を形成した。発光層に含まれる化合物BHと化合物BDの質量比は96:4であった。
この発光層の成膜に続けて、化合物ET1を蒸着して膜厚10nmの第1電子輸送層を形成した後、化合物ET2を蒸着して膜厚15nmの第2電子輸送層を形成した。
この第2電子輸送層上にLiFを蒸着して膜厚1nmの電子注入層を形成した。
この電子注入層上に金属Alを蒸着して膜厚80nmの金属陰極を形成し、有機EL素子を作製した。
素子性能の測定
得られた有機EL素子の駆動電圧及び外部量子効率を実施例1と同様にして測定した。結果を表2に示す。
本発明化合物のこの優れた効果は、スピロ(キサンテンフルオレン)骨格の2つの酸素原子の不対電子がキャリア移動を容易にし、得られた良好なキャリア移動性によって発光層内のキャリア量が増大し、その結果、効率が高くなることに起因すると考えられる。
2 基板
3 陽極
4 陰極
5 発光層
6 正孔輸送帯域(正孔輸送層)
6a 第1正孔輸送層
6b 第2正孔輸送層
7 電子輸送帯域(電子輸送層)
7a 第1電子輸送層
7b 第2電子輸送層
10、20 発光ユニット
Claims (27)
- 下記式(1)で表される化合物。
(式中、
R1~R8、R11~R18、R21~R28、及びR31~R38、はそれぞれ独立して水素原子、置換もしくは無置換の炭素数1~30のアルキル基、置換もしくは無置換の環形成炭素数3~30のシクロアルキル基、置換もしくは無置換の環形成炭素数6~30のアリール基、置換もしくは無置換の環形成原子数5~30のヘテロアリール基、置換もしくは無置換の炭素数7~36のアラルキル基、置換もしくは無置換の炭素数1~30のアルコキシ基、置換もしくは無置換の環形成炭素数6~30のアリールオキシ基、置換もしくは無置換の炭素数1~30のアルキル基及び置換もしくは無置換の環形成炭素数6~30のアリール基から選ばれる置換基を有するモノ、ジ又はトリ置換シリル基、置換もしくは無置換の炭素数1~30ハロアルキル基、置換もしくは無置換の炭素数1~30のハロアルコキシ基、ハロゲン原子、シアノ基、又はニトロ基である。
R1~R4から選ばれる隣接する2つ、R5~R8から選ばれる隣接する2つ、R11~R14から選ばれる隣接する2つ、R15~R18から選ばれる隣接する2つ、R21~R24から選ばれる隣接する2つ、R25~R28から選ばれる隣接する2つ、R31~R34から選ばれる隣接する2つ、及び、R35~R38から選ばれる隣接する2つは互いに結合して環構造を形成してもよい。
ただし、R1~R8及びR11~R18から選ばれる1つが*1に結合する単結合を表すか、又は、R1~R4から選ばれる隣接する2つ、R5~R8から選ばれる隣接する2つ、R11~R14から選ばれる隣接する2つ、又はR15~R18から選ばれる隣接する2つが形成する前記環構造の環形成原子が*1に結合し;
R21~R28及びR31~R38から選ばれる1つが*2に結合する単結合を表すか、又は、R21~R24から選ばれる隣接する2つ、R25~R28から選ばれる隣接する2つ、R31~R34から選ばれる隣接する2つ、又はR35~R38から選ばれる隣接する2つが形成する前記環構造の環形成原子が*2に結合する。
Xは酸素原子又は硫黄原子を表す。
Yは酸素原子又は硫黄原子を表す。
L1、L2、及びL3はそれぞれ独立して単結合、置換もしくは無置換の環形成炭素数6~30のアリーレン基、又は置換もしくは無置換の環形成原子数5~30のヘテロアリーレン基である。
Arは置換もしくは無置換の環形成炭素数6~30のアリール基、置換もしくは無置換の環形成原子数5~30の窒素含有ヘテロアリール基、置換もしくは無置換の環形成原子数5~30の酸素含有ヘテロアリール基、又は置換もしくは無置換の環形成原子数5~30の硫黄含有ヘテロアリール基である。
「置換もしくは無置換」というときの任意の置換基は、炭素数1~30のアルキル基、環形成炭素数3~30のシクロアルキル基、環形成炭素数6~30のアリール基、環形成原子数5~30ヘテロアリール基、置換もしくは無置換の炭素数7~36アラルキル基、炭素数1~30のアルコキシ基、環形成炭素数6~30のアリールオキシ基、炭素数1~30のアルキル基及び環形成炭素数6~30アリール基から選ばれる置換基を有するモノ、ジ又はトリ置換シリル基、炭素数1~30のハロアルキル基、炭素数1~30のハロアルコキシ基、ハロゲン原子、シアノ基、及びニトロ基からなる群より選ばれる。) - R2~R7から選ばれる1つが*1に結合する単結合を表す請求項1に記載の化合物。
- R22~R27から選ばれる1つが*2に結合する単結合を表す請求項1又は2に記載の化合物。
- XとYの双方が酸素原子である請求項1~4のいずれか1項に記載の化合物。
- XとYの双方が硫黄原子である請求項1~4のいずれか1項に記載の化合物。
- XとYの一方が酸素原子であり、他方が硫黄原子である請求項1~4のいずれか1項に記載の化合物。
- L1及びL2がそれぞれ表す置換もしくは無置換の環形成炭素数6~30のアリーレン基において、該アリーレン基は、フェニレン基、ビフェニリレン基、ターフェニリレン基、ナフチレン基、アントリレン基、ベンゾアントリレン基、フェナントリレン基、ベンゾフェナントリレン基、フェナレニレン基、ピセニレン基、ペンタフェニレン基、ピレニレン基、クリセニレン基、ベンゾクリセニレン基、トリフェニレニレン基、フルオランテニレン基、フルオレニレン基、又は9,9’-スピロビフルオレニレン基であり、
L1及びL2がそれぞれ表す置換もしくは無置換の環形成原子数5~30のヘテロアリーレン基において、該ヘテロアリーレン基は、ピロール、イミダゾール、ピラゾール、トリアゾール、フラン、チオフェン、オキサゾール、イソオキサゾール、オキサジアゾール、チアゾール、イソチアゾール、チアジアゾール、ピリジン、ピリダジン、ピリミジン、ピラジン、トリアジン、インドール、イソインドール、インドリジン、キノリジン、キノリン、イソキノリン、シンノリン、フタラジン、キナゾリン、キノキサリン、ベンゾイミダゾール、インダゾール、フェナントロリン、フェナントリジン、アクリジン、フェナジン、カルバゾール、ベンゾカルバゾール、キサンテン、ベンゾフラン、イソベンゾフラン、ジベンゾフラン、ナフトベンゾフラン、ベンゾチオフェン、ジベンゾチオフェン、ナフトベンゾチオフェン、ベンゾオキサゾール、ベンゾイソキサゾール、フェノキサジン、ベンゾチアゾール、ベンゾイソチアゾール、及びフェノチアジンから選ばれる芳香族複素環の2価の残基である請求項1~7のいずれか1項に記載の化合物。 - L1及びL2の双方が単結合である請求項1~8のいずれか1項に記載の化合物。
- L3が表す置換もしくは無置換の環形成炭素数6~30のアリーレン基において、該アリーレン基は、フェニレン基、ビフェニリレン基、ターフェニリレン基、ナフチレン基、アントリレン基、ベンゾアントリレン基、フェナントリレン基、ベンゾフェナントリレン基、フェナレニレン基、ピセニレン基、ペンタフェニレン基、ピレニレン基、クリセニレン基、ベンゾクリセニレン基、トリフェニレニレン基、フルオランテニレン基、フルオレニレン基、又は9,9’-スピロビフルオレニレン基であり、
L3が表す置換もしくは無置換の環形成原子数5~30のヘテロアリーレン基において、該ヘテロアリーレン基は、ピロール、イミダゾール、ピラゾール、トリアゾール、フラン、チオフェン、オキサゾール、イソオキサゾール、オキサジアゾール、チアゾール、イソチアゾール、チアジアゾール、ピリジン、ピリダジン、ピリミジン、ピラジン、トリアジン、インドール、イソインドール、インドリジン、キノリジン、キノリン、イソキノリン、シンノリン、フタラジン、キナゾリン、キノキサリン、ベンゾイミダゾール、インダゾール、フェナントロリン、フェナントリジン、アクリジン、フェナジン、カルバゾール、ベンゾカルバゾール、キサンテン、ベンゾフラン、イソベンゾフラン、ジベンゾフラン、ナフトベンゾフラン、ベンゾチオフェン、ジベンゾチオフェン、ナフトベンゾチオフェン、ベンゾオキサゾール、ベンゾイソキサゾール、フェノキサジン、ベンゾチアゾール、ベンゾイソチアゾール、及びフェノチアジンから選ばれる芳香族複素環の2価の残基である請求項1~11のいずれか1項に記載の化合物。 - L3が単結合である請求項1~11のいずれか1項に記載の化合物。
- Arが表す置換もしくは無置換の環形成炭素数6~30のアリール基において、該アリール基は、フェニル基、ビフェニリル基、ターフェニリル基、ナフチル基、アセナフチレニル基、ビフェニレニル基、フルオレニル基、s-インダセニル基、as-インダセニル基、アントリル基、ベンゾアントリル基、アセアントリレニル基、フェナントリル基、ベンゾフェナントリル基、フェナレニル基、ナフタセニル基、フルオランテニル基、ピレニル基、クリセニル基、ベンゾクリセニル基、トリフェニレニル基、ペンタセニル基、ピセニル基、及び、ペンタフェニル基から選ばれ、該置換アリール基は9,9’-スピロビフルオレニル基、9,9-ジフェニルフルオレニル基、及び9,9-ジメチルフルオレニル基から選ばれ、
Arが表す置換もしくは無置換の環形成原子数5~30の窒素含有ヘテロアリール基において、該窒素含有ヘテロアリール基は、ピロリル基、イミダゾリル基、ピラゾリル基、トリアゾリル基、オキサゾリル基、イソオキサゾリル基、オキサジアゾリル基、チアゾリル基、イソチアゾリル基、チアジアゾリル基、ピリジル基、ピリダジニル基、ピリミジニル基、ピラジニル基、トリアジニル基、インドリル基、イソインドリル基、インドリジニル基、キノリジニル基、キノリル基、イソキノリル基、シンノリル基、フタラジニル基、キナゾリニル基、キノキサリニル基、ベンゾイミダゾリル基、インダゾリル基、フェナントロリニル基、フェナントリジニル基、アクリジニル基、フェナジニル基、カルバゾリル基、ベンゾカルバゾリル基、及びキサンテニル基から選ばれ、
Arが表す置換もしくは無置換の環形成原子数5~30の酸素含有ヘテロアリール基において、該酸素含有ヘテロアリール基は、フリル基、オキサゾリル基、イソオキサゾリル基、オキサジアゾリル基、キサンテニル基、ベンゾフラニル基、ジベンゾフラニル基、ナフトベンゾフラニル基、ベンゾオキサゾリル基、ベンゾイソキサゾリル基、フェノキサジニル基、及び、スピロ[9H-キサンテン-9,9’-[9H]フルオレン]の1価の残基から選ばれ、
Arが表す置換もしくは無置換の環形成原子数5~30の硫黄含有ヘテロアリール基において、該硫黄含有ヘテロアリール基は、チエニル基、チアゾリル基、イソチアゾリル基、チアジアゾリル基、ベンゾチオフェニル基、ジベンゾチオフェニル基、ナフトベンゾチオフェニル基、ベンゾチアゾリル基、ベンゾイソチアゾリル基、フェノチアジニル基、及び、スピロ[9H-チオキサンテン-9,9’-[9H]フルオレン]の1価の残基から選ばれる請求項1~14のいずれか1項に記載の化合物。 - *1に結合する単結合を表さず、かつ、前記環構造を形成しないR1~R8がすべて水素原子である請求項1~15のいずれか1項に記載の化合物。
- *2に結合する単結合を表さず、かつ、前記環構造を形成しないR21~R28がすべて水素原子である請求項1~16のいずれか1項に記載の化合物。
- *1に結合する単結合を表さず、かつ、前記環構造を形成しないR11~R18がすべて水素原子である請求項1~17のいずれか1項に記載の化合物。
- *2に結合する単結合を表さず、かつ、前記環構造を形成しないR31~R38がすべて水素原子である請求項1~18のいずれか1項に記載の化合物。
- R1とR2;R2とR3;R3とR4;R2とR3及びR5とR6の双方;R2とR3及びR6とR7の双方;R3とR4及びR5とR6の双方;又はR12とR13が前記環構造を形成する請求項1~19のいずれか1項に記載の化合物。
- R21とR22;R22とR23;R23とR24;R22とR23及びR25とR26の双方;R22とR23及びR26とR27の双方;R23とR24及びR25とR26の双方;又はR32とR33が前記環構造を形成する請求項1~20のいずれか1項に記載の化合物。
- 前記環構造が、置換もしくは無置換の環形成炭素数6~18の芳香族炭化水素環、置換もしくは無置換の環形成炭素数5~18の脂肪族炭化水素環、置換もしくは無置換の環形成原子数5~18の芳香族複素環、又は置換もしくは無置換の環形成原子数5~18の脂肪族複素環である請求項1~21いずれか1項に記載の化合物。
- 陰極、陽極、及び該陰極と該陽極の間に配置された有機層を含む有機エレクトロルミネッセンス素子であって、該有機層が発光層を含み、該有機層の少なくとも1層が請求項1~22のいずれか1項に記載の化合物を含む有機エレクトロルミネッセンス素子。
- 前記陽極と前記発光層の間に正孔輸送帯域を含み、該正孔輸送帯域が前記化合物を含む請求項23に記載の有機エレクトロルミネッセンス素子。
- 前記陽極と前記発光層の間に正孔輸送層を含み、該正孔輸送層が前記化合物を含む請求項23に記載の有機エレクトロルミネッセンス素子。
- 前記正孔輸送層が陽極側の第1正孔輸送層と陰極側の第2正孔輸送層を含み、該第1正孔輸送層と該第2正孔輸送層の一方又は双方が前記化合物を含む請求項25に記載の有機エレクトロルミネッセンス素子。
- 請求項23~26のいずれか1項に記載の有機エレクトロルミネッセンス素子を含む電子機器。
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CN114335361B (zh) * | 2020-09-30 | 2024-03-22 | 江苏三月科技股份有限公司 | 一种组合物及包含其的有机电致发光器件 |
CN114516804A (zh) * | 2020-11-18 | 2022-05-20 | 江苏三月科技股份有限公司 | 一种二胺衍生物及使用该衍生物的有机电致发光器件 |
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KR20190015211A (ko) | 2019-02-13 |
US20190088879A1 (en) | 2019-03-21 |
JP7033140B2 (ja) | 2022-03-09 |
CN109476626B (zh) | 2022-09-09 |
JPWO2019027040A1 (ja) | 2020-08-20 |
CN109476626A (zh) | 2019-03-15 |
EP3663288B1 (en) | 2022-06-08 |
KR102088180B1 (ko) | 2020-03-12 |
EP3663288A1 (en) | 2020-06-10 |
EP3663288A4 (en) | 2021-05-12 |
US10424740B2 (en) | 2019-09-24 |
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