KR102399932B1 - 열 활성 지연 형광용 화합물 및 이를 포함하는 유기 전계 발광 소자 - Google Patents
열 활성 지연 형광용 화합물 및 이를 포함하는 유기 전계 발광 소자 Download PDFInfo
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- KR102399932B1 KR102399932B1 KR1020170094884A KR20170094884A KR102399932B1 KR 102399932 B1 KR102399932 B1 KR 102399932B1 KR 1020170094884 A KR1020170094884 A KR 1020170094884A KR 20170094884 A KR20170094884 A KR 20170094884A KR 102399932 B1 KR102399932 B1 KR 102399932B1
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 114
- 230000003111 delayed effect Effects 0.000 title claims abstract description 58
- 238000005401 electroluminescence Methods 0.000 title description 2
- 230000005525 hole transport Effects 0.000 claims description 49
- 125000001072 heteroaryl group Chemical group 0.000 claims description 30
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 25
- 125000003118 aryl group Chemical group 0.000 claims description 23
- 229910052805 deuterium Inorganic materials 0.000 claims description 23
- 125000004431 deuterium atom Chemical group 0.000 claims description 23
- 125000004432 carbon atom Chemical group C* 0.000 claims description 21
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 15
- 125000000217 alkyl group Chemical group 0.000 claims description 13
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 10
- 239000002019 doping agent Substances 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 125000000714 pyrimidinyl group Chemical group 0.000 claims description 8
- 125000005843 halogen group Chemical group 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
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- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- 229910052779 Neodymium Inorganic materials 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
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- 229910052738 indium Inorganic materials 0.000 claims description 4
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- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Inorganic materials [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
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- 229910052697 platinum Inorganic materials 0.000 claims description 4
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- WWTBZEKOSBFBEM-SPWPXUSOSA-N (2s)-2-[[2-benzyl-3-[hydroxy-[(1r)-2-phenyl-1-(phenylmethoxycarbonylamino)ethyl]phosphoryl]propanoyl]amino]-3-(1h-indol-3-yl)propanoic acid Chemical compound N([C@@H](CC=1C2=CC=CC=C2NC=1)C(=O)O)C(=O)C(CP(O)(=O)[C@H](CC=1C=CC=CC=1)NC(=O)OCC=1C=CC=CC=1)CC1=CC=CC=C1 WWTBZEKOSBFBEM-SPWPXUSOSA-N 0.000 description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 5
- ISMDILRWKSYCOD-GNKBHMEESA-N C(C1=CC=CC=C1)[C@@H]1NC(OCCCCCCCCCCCNC([C@@H](NC(C[C@@H]1O)=O)C(C)C)=O)=O Chemical compound C(C1=CC=CC=C1)[C@@H]1NC(OCCCCCCCCCCCNC([C@@H](NC(C[C@@H]1O)=O)C(C)C)=O)=O ISMDILRWKSYCOD-GNKBHMEESA-N 0.000 description 5
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 125000003277 amino group Chemical group 0.000 description 4
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 4
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- 238000001931 thermography Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 4
- AWXGSYPUMWKTBR-UHFFFAOYSA-N 4-carbazol-9-yl-n,n-bis(4-carbazol-9-ylphenyl)aniline Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(N(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=C1 AWXGSYPUMWKTBR-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical class CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 125000003342 alkenyl group Chemical group 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000012043 crude product Substances 0.000 description 3
- DKHNGUNXLDCATP-UHFFFAOYSA-N dipyrazino[2,3-f:2',3'-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile Chemical compound C12=NC(C#N)=C(C#N)N=C2C2=NC(C#N)=C(C#N)N=C2C2=C1N=C(C#N)C(C#N)=N2 DKHNGUNXLDCATP-UHFFFAOYSA-N 0.000 description 3
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 description 3
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- VMFMUJZRXZXYAH-UHFFFAOYSA-N n-[5-[[5-chloro-4-[2-[2-(dimethylamino)-2-oxoacetyl]anilino]pyrimidin-2-yl]amino]-4-methoxy-2-(4-methylpiperazin-1-yl)phenyl]prop-2-enamide Chemical compound C=CC(=O)NC=1C=C(NC=2N=C(NC=3C(=CC=CC=3)C(=O)C(=O)N(C)C)C(Cl)=CN=2)C(OC)=CC=1N1CCN(C)CC1 VMFMUJZRXZXYAH-UHFFFAOYSA-N 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 3
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- LVTJOONKWUXEFR-FZRMHRINSA-N protoneodioscin Natural products O(C[C@@H](CC[C@]1(O)[C@H](C)[C@@H]2[C@]3(C)[C@H]([C@H]4[C@@H]([C@]5(C)C(=CC4)C[C@@H](O[C@@H]4[C@H](O[C@H]6[C@@H](O)[C@@H](O)[C@@H](O)[C@H](C)O6)[C@@H](O)[C@H](O[C@H]6[C@@H](O)[C@@H](O)[C@@H](O)[C@H](C)O6)[C@H](CO)O4)CC5)CC3)C[C@@H]2O1)C)[C@H]1[C@H](O)[C@H](O)[C@H](O)[C@@H](CO)O1 LVTJOONKWUXEFR-FZRMHRINSA-N 0.000 description 3
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- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 description 3
- PCCVSPMFGIFTHU-UHFFFAOYSA-N tetracyanoquinodimethane Chemical compound N#CC(C#N)=C1C=CC(=C(C#N)C#N)C=C1 PCCVSPMFGIFTHU-UHFFFAOYSA-N 0.000 description 3
- 238000001771 vacuum deposition Methods 0.000 description 3
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- SRKGZXIJDGWVAI-GVAVTCRGSA-M (e,3r)-7-[6-tert-butyl-4-(4-fluorophenyl)-2-propan-2-ylpyridin-3-yl]-3,5-dihydroxyhept-6-enoate Chemical compound CC(C)C1=NC(C(C)(C)C)=CC(C=2C=CC(F)=CC=2)=C1\C=C\C(O)C[C@@H](O)CC([O-])=O SRKGZXIJDGWVAI-GVAVTCRGSA-M 0.000 description 2
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- IYZMXHQDXZKNCY-UHFFFAOYSA-N 1-n,1-n-diphenyl-4-n,4-n-bis[4-(n-phenylanilino)phenyl]benzene-1,4-diamine Chemical compound C1=CC=CC=C1N(C=1C=CC(=CC=1)N(C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C1=CC=CC=C1 IYZMXHQDXZKNCY-UHFFFAOYSA-N 0.000 description 2
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- ZOKIJILZFXPFTO-UHFFFAOYSA-N 4-methyl-n-[4-[1-[4-(4-methyl-n-(4-methylphenyl)anilino)phenyl]cyclohexyl]phenyl]-n-(4-methylphenyl)aniline Chemical compound C1=CC(C)=CC=C1N(C=1C=CC(=CC=1)C1(CCCCC1)C=1C=CC(=CC=1)N(C=1C=CC(C)=CC=1)C=1C=CC(C)=CC=1)C1=CC=C(C)C=C1 ZOKIJILZFXPFTO-UHFFFAOYSA-N 0.000 description 2
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- VIZUPBYFLORCRA-UHFFFAOYSA-N 9,10-dinaphthalen-2-ylanthracene Chemical compound C12=CC=CC=C2C(C2=CC3=CC=CC=C3C=C2)=C(C=CC=C2)C2=C1C1=CC=C(C=CC=C2)C2=C1 VIZUPBYFLORCRA-UHFFFAOYSA-N 0.000 description 2
- LTUJKAYZIMMJEP-UHFFFAOYSA-N 9-[4-(4-carbazol-9-yl-2-methylphenyl)-3-methylphenyl]carbazole Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(C=2C(=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C)C(C)=C1 LTUJKAYZIMMJEP-UHFFFAOYSA-N 0.000 description 2
- VFUDMQLBKNMONU-UHFFFAOYSA-N 9-[4-(4-carbazol-9-ylphenyl)phenyl]carbazole Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=C1 VFUDMQLBKNMONU-UHFFFAOYSA-N 0.000 description 2
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- 229940126062 Compound A Drugs 0.000 description 2
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- 101000837344 Homo sapiens T-cell leukemia translocation-altered gene protein Proteins 0.000 description 2
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 125000006267 biphenyl group Chemical group 0.000 description 2
- UFVXQDWNSAGPHN-UHFFFAOYSA-K bis[(2-methylquinolin-8-yl)oxy]-(4-phenylphenoxy)alumane Chemical compound [Al+3].C1=CC=C([O-])C2=NC(C)=CC=C21.C1=CC=C([O-])C2=NC(C)=CC=C21.C1=CC([O-])=CC=C1C1=CC=CC=C1 UFVXQDWNSAGPHN-UHFFFAOYSA-K 0.000 description 2
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- TXCDCPKCNAJMEE-UHFFFAOYSA-N dibenzofuran Chemical compound C1=CC=C2C3=CC=CC=C3OC2=C1 TXCDCPKCNAJMEE-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- 238000007641 inkjet printing Methods 0.000 description 2
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- IMKMFBIYHXBKRX-UHFFFAOYSA-M lithium;quinoline-2-carboxylate Chemical compound [Li+].C1=CC=CC2=NC(C(=O)[O-])=CC=C21 IMKMFBIYHXBKRX-UHFFFAOYSA-M 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 125000002950 monocyclic group Chemical group 0.000 description 2
- IBHBKWKFFTZAHE-UHFFFAOYSA-N n-[4-[4-(n-naphthalen-1-ylanilino)phenyl]phenyl]-n-phenylnaphthalen-1-amine Chemical compound C1=CC=CC=C1N(C=1C2=CC=CC=C2C=CC=1)C1=CC=C(C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C3=CC=CC=C3C=CC=2)C=C1 IBHBKWKFFTZAHE-UHFFFAOYSA-N 0.000 description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 description 2
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- 150000004059 quinone derivatives Chemical class 0.000 description 2
- FGDZQCVHDSGLHJ-UHFFFAOYSA-M rubidium chloride Chemical compound [Cl-].[Rb+] FGDZQCVHDSGLHJ-UHFFFAOYSA-M 0.000 description 2
- MFRIHAYPQRLWNB-UHFFFAOYSA-N sodium tert-butoxide Chemical compound [Na+].CC(C)(C)[O-] MFRIHAYPQRLWNB-UHFFFAOYSA-N 0.000 description 2
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- 125000001725 pyrenyl group Chemical group 0.000 description 1
- PBMFSQRYOILNGV-UHFFFAOYSA-N pyridazine Chemical group C1=CC=NN=C1 PBMFSQRYOILNGV-UHFFFAOYSA-N 0.000 description 1
- 125000004076 pyridyl group Chemical group 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- 125000002294 quinazolinyl group Chemical group N1=C(N=CC2=CC=CC=C12)* 0.000 description 1
- 125000002943 quinolinyl group Chemical group N1=C(C=CC2=CC=CC=C12)* 0.000 description 1
- 125000001567 quinoxalinyl group Chemical group N1=C(C=NC2=CC=CC=C12)* 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 125000005504 styryl group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- WSANLGASBHUYGD-UHFFFAOYSA-N sulfidophosphanium Chemical group S=[PH3] WSANLGASBHUYGD-UHFFFAOYSA-N 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- JLBRGNFGBDNNSF-UHFFFAOYSA-N tert-butyl(dimethyl)borane Chemical group CB(C)C(C)(C)C JLBRGNFGBDNNSF-UHFFFAOYSA-N 0.000 description 1
- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000001113 thiadiazolyl group Chemical group 0.000 description 1
- 125000000335 thiazolyl group Chemical group 0.000 description 1
- VJYJJHQEVLEOFL-UHFFFAOYSA-N thieno[3,2-b]thiophene Chemical group S1C=CC2=C1C=CS2 VJYJJHQEVLEOFL-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- LALRXNPLTWZJIJ-UHFFFAOYSA-N triethylborane Chemical group CCB(CC)CC LALRXNPLTWZJIJ-UHFFFAOYSA-N 0.000 description 1
- WXRGABKACDFXMG-UHFFFAOYSA-N trimethylborane Chemical group CB(C)C WXRGABKACDFXMG-UHFFFAOYSA-N 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
- MXSVLWZRHLXFKH-UHFFFAOYSA-N triphenylborane Chemical group C1=CC=CC=C1B(C=1C=CC=CC=1)C1=CC=CC=C1 MXSVLWZRHLXFKH-UHFFFAOYSA-N 0.000 description 1
- 125000005580 triphenylene group Chemical group 0.000 description 1
- 229910000404 tripotassium phosphate Inorganic materials 0.000 description 1
- 235000019798 tripotassium phosphate Nutrition 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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Abstract
Description
도 2는 본 발명의 일 실시예에 따른 유기 전계 발광 소자를 개략적으로 나타낸 단면도이다.
도 3은 본 발명의 일 실시예에 따른 유기 전계 발광 소자를 개략적으로 나타낸 단면도이다.
S1 에너지 준위 | T1 에너지 준위 | EST | 애스팩트비 | |
실시예 화합물 20 | 2.91 | 2.82 | 0.09 | 1.6 |
실시예 화합물 22 | 2.58 | 2.57 | 0.01 | 2.1 |
실시예 화합물 33 | 2.68 | 2.65 | 0.03 | 2.0 |
실시예 화합물 17 | 2.61 | 2.60 | 0.01 | 2.1 |
비교예 화합물 X-1 | 2.49 | 2.48 | 0.01 | 1.2 |
비교예 화합물 X-2 | 2.84 | 2.54 | 0.30 | 1.1 |
비교예 화합물 X-3 | 2.53 | 2.52 | 0.01 | 1.4 |
비교예 화합물 X-4 | 3.42 | 3.14 | 0.28 | 1.9 |
비교예 화합물 X-5 | 2.84 | 2.80 | 0.04 | 1.2 |
발광층 | λmax (nm) | ηext(%) | |
실시예 1 | 실시예 화합물 20 | 448 | 21 |
실시예 2 | 실시예 화합물 22 | 452 | 23 |
실시예 3 | 실시예 화합물 33 | 450 | 22 |
실시예 4 | 실시예 화합물 17 | 459 | 24 |
비교예 1 | 비교예 화합물 X-1 | 462 | 15 |
비교예 2 | 비교예 화합물 X-2 | 460 | 1 |
비교예 3 | 비교예 화합물 X-3 | 455 | 18 |
비교예 4 | 비교예 화합물 X-4 | 401 | 2 |
비교예 5 | 비교예 화합물 X-5 | 459 | 14 |
HTR: 정공 수송 영역 HIL: 정공 주입층
HTL: 전자 수송층 EML: 발광층
ETR: 전자 수송 영역 ETL: 전자 수송층
EIL: 전자 주입층 EL2: 제2 전극
Claims (20)
- 하기 화학식 1로 표시되고, 분자의 애스팩트비(aspect ratio)가 1.5 이상인 열 활성 지연 형광용 화합물:
[화학식 1]
상기 화학식 1에서,
X1 및 X2는 각각 독립적으로 C, Si 또는 Ge이고,
R1 내지 R6은 각각 독립적으로 수소 원자, 중수소 원자, 할로겐 원자, 또는 치환 또는 비치환된 탄소수 1 이상 3 이하의 알킬기이며,
a 내지 f는 각각 독립적으로 0 이상 4 이하의 정수이고,
Ar1 및 Ar2는 각각 독립적으로 치환 또는 비치환된 고리 형성 탄소수 6 이상 60 이하의 아릴기, 또는 치환 또는 비치환된 고리 형성 탄소수 2 이상 60 이하의 헤테로아릴기이며,
Ar1 및 Ar2 중 적어도 하나는 전자 수용성기이고,
Ar1 및 Ar2는 서로 상이하다. - 제1항에 있어서,
Ar1 및 Ar2 중 적어도 하나는 치환 또는 비치환된 헤테로아릴기, 또는 치환 또는 비치환된 헤테로아릴기로 치환된 아릴기인 것인 열 활성 지연 형광용 화합물. - 제1항에 있어서,
Ar1 및 Ar2 중 적어도 하나는 하기 화학식 2 또는 3으로 표시되는 것인 열 활성 지연 형광용 화합물:
[화학식 2]
[화학식 3]
상기 화학식 2에서,
n은 0 또는 1이고,
Z1 내지 Z5는 각각 독립적으로 N 또는 CR7이고,
n이 0일 때, Z1 및 Z5는 각각 독립적으로 N 또는 CH이며,
Z1 내지 Z5 중 1개 또는 2개는 N이고,
R7은 수소 원자, 중수소 원자, 시아노기, 메틸기, 치환 또는 비치환된 페닐기, 치환 또는 비치환된 피리딘기, 또는 치환 또는 비치환된 피리미딘기이고,
상기 화학식 3에서,
Z6 내지 Z15는 각각 독립적으로 N 또는 CR8이고,
Z6 내지 Z15 중 적어도 하나는 N이며,
R8은 수소 원자, 중수소 원자, 시아노기, 또는 메틸기이다. - 제1항에 있어서,
X1 및 X2 중 적어도 하나는 C인 것인 열 활성 지연 형광용 화합물. - 제1항에 있어서,
일중항(singlet) 에너지 준위 및 삼중항(triplet) 에너지 준위 차이의 절대 값이 0.2eV 이하인 것인 열 활성 지연 형광용 화합물. - 제1 전극;
상기 제1 전극 상에 제공된 정공 수송 영역;
상기 정공 수송 영역 상에 제공된 발광층;
상기 발광층 상에 제공된 전자 수송 영역; 및
상기 전자 수송 영역 상에 제공된 제2 전극을 포함하고,
상기 제1 전극 및 상기 제2 전극은 각각 독립적으로, Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF/Ca, LiF/Al, Mo, Ti, In, Sn, 및 Zn 중 선택되는 적어도 하나, 이들 중 선택되는 2종 이상의 화합물, 이들 중 선택되는 2종 이상의 혼합물, 또는 이들의 산화물을 포함하며,
상기 발광층은 하기 화학식 1로 표시되고, 분자의 애스팩트비(aspect ratio)가 1.5 이상인 열 활성 지연 형광용 화합물을 포함하는 것인 유기 전계 발광 소자:
[화학식 1]
상기 화학식 1에서,
X1 및 X2는 각각 독립적으로 C, Si 또는 Ge이고,
R1 내지 R6은 각각 독립적으로 수소 원자, 중수소 원자, 할로겐 원자, 또는 치환 또는 비치환된 탄소수 1 이상 3 이하의 알킬기이며,
a 내지 f는 각각 독립적으로 0 이상 4 이하의 정수이고,
Ar1 및 Ar2는 각각 독립적으로 치환 또는 비치환된 고리 형성 탄소수 6 이상 60 이하의 아릴기, 또는 치환 또는 비치환된 고리 형성 탄소수 2 이상 60 이하의 헤테로아릴기이며,
Ar1 및 Ar2 중 적어도 하나는 전자 수용성기이고,
Ar1 및 Ar2는 서로 상이하다. - 제9항에 있어서,
상기 발광층은 호스트 및 도펀트를 포함하고,
상기 도펀트가 상기 열 활성 지연 형광용 화합물을 포함하는 것인 유기 전계 발광 소자. - 제9항에 있어서,
Ar1 및 Ar2 중 적어도 하나는 치환 또는 비치환된 헤테로아릴기, 또는 치환 또는 비치환된 헤테로아릴기로 치환된 아릴기인 것인 유기 전계 발광 소자. - 제9항에 있어서,
Ar1 및 Ar2 중 적어도 하나는 하기 화학식 2 또는 3으로 표시되는 것인 유기 전계 발광 소자:
[화학식 2]
[화학식 3]
상기 화학식 2에서,
n은 0 또는 1이고,
Z1 내지 Z5는 각각 독립적으로 N 또는 CR7이고,
n이 0일 때, Z1 및 Z5는 각각 독립적으로 N 또는 CH이며,
Z1 내지 Z5 중 1개 또는 2개는 N이고,
R7은 수소 원자, 중수소 원자, 시아노기, 메틸기, 치환 또는 비치환된 페닐기, 치환 또는 비치환된 피리딘기, 또는 치환 또는 비치환된 피리미딘기이고,
상기 화학식 3에서,
Z6 내지 Z15는 각각 독립적으로 N 또는 CR8이고,
Z6 내지 Z15 중 적어도 하나는 N이며,
R8은 수소 원자, 중수소 원자, 시아노기, 또는 메틸기이다. - 제9항에 있어서,
X1 및 X2 중 적어도 하나는 C인 것인 유기 전계 발광 소자. - 제9항에 있어서,
상기 열 활성 지연 형광용 화합물은 일중항(singlet) 에너지 준위 및 삼중항(triplet) 에너지 준위 차이의 절대 값이 0.2eV 이하인 것인 유기 전계 발광 소자. - 제9항에 있어서,
상기 열 활성 지연 형광용 화합물은 470nm 이하의 파장 영역을 갖는 청색 광을 발광하는 것인 유기 전계 발광 소자. - 삭제
- 삭제
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