JP4940658B2 - 有機エレクトロルミネッセンス素子 - Google Patents
有機エレクトロルミネッセンス素子 Download PDFInfo
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- JP4940658B2 JP4940658B2 JP2005511356A JP2005511356A JP4940658B2 JP 4940658 B2 JP4940658 B2 JP 4940658B2 JP 2005511356 A JP2005511356 A JP 2005511356A JP 2005511356 A JP2005511356 A JP 2005511356A JP 4940658 B2 JP4940658 B2 JP 4940658B2
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- 238000005401 electroluminescence Methods 0.000 title claims description 14
- 150000001875 compounds Chemical class 0.000 claims description 108
- 125000001424 substituent group Chemical group 0.000 claims description 38
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 9
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 8
- 125000001153 fluoro group Chemical group F* 0.000 claims description 5
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 5
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 200
- -1 cation radical Chemical class 0.000 description 120
- 238000000034 method Methods 0.000 description 64
- 125000006575 electron-withdrawing group Chemical group 0.000 description 48
- 239000000463 material Substances 0.000 description 40
- 230000000903 blocking effect Effects 0.000 description 36
- 125000003118 aryl group Chemical group 0.000 description 30
- 239000000872 buffer Substances 0.000 description 30
- 239000000758 substrate Substances 0.000 description 28
- 230000005525 hole transport Effects 0.000 description 26
- 239000010408 film Substances 0.000 description 22
- 238000010438 heat treatment Methods 0.000 description 21
- 125000004093 cyano group Chemical group *C#N 0.000 description 17
- 239000000203 mixture Substances 0.000 description 17
- 229910052751 metal Inorganic materials 0.000 description 15
- 239000002184 metal Substances 0.000 description 15
- 239000011159 matrix material Substances 0.000 description 14
- 238000002347 injection Methods 0.000 description 13
- 239000007924 injection Substances 0.000 description 13
- 229910052757 nitrogen Inorganic materials 0.000 description 13
- 239000000975 dye Substances 0.000 description 12
- 238000000605 extraction Methods 0.000 description 12
- 238000007740 vapor deposition Methods 0.000 description 12
- 229910052782 aluminium Inorganic materials 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 125000000217 alkyl group Chemical group 0.000 description 10
- 238000004770 highest occupied molecular orbital Methods 0.000 description 10
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 9
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 9
- 229910052749 magnesium Inorganic materials 0.000 description 9
- 239000011777 magnesium Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 229910052750 molybdenum Inorganic materials 0.000 description 9
- 239000011733 molybdenum Substances 0.000 description 9
- STTGYIUESPWXOW-UHFFFAOYSA-N 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline Chemical compound C=12C=CC3=C(C=4C=CC=CC=4)C=C(C)N=C3C2=NC(C)=CC=1C1=CC=CC=C1 STTGYIUESPWXOW-UHFFFAOYSA-N 0.000 description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 239000007772 electrode material Substances 0.000 description 8
- 239000010409 thin film Substances 0.000 description 8
- 238000000151 deposition Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 7
- 230000003595 spectral effect Effects 0.000 description 7
- 238000001771 vacuum deposition Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
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- 239000003086 colorant Substances 0.000 description 6
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- 229910001873 dinitrogen Inorganic materials 0.000 description 6
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000006862 quantum yield reaction Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 229910052741 iridium Inorganic materials 0.000 description 5
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
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- 238000005266 casting Methods 0.000 description 4
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- 239000007850 fluorescent dye Substances 0.000 description 4
- 229910052738 indium Inorganic materials 0.000 description 4
- 125000005647 linker group Chemical group 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000004544 sputter deposition Methods 0.000 description 4
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 125000003545 alkoxy group Chemical group 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 3
- 125000004397 aminosulfonyl group Chemical group NS(=O)(=O)* 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 3
- 230000005281 excited state Effects 0.000 description 3
- 125000005567 fluorenylene group Chemical group 0.000 description 3
- 125000005843 halogen group Chemical group 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 3
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 125000001624 naphthyl group Chemical group 0.000 description 3
- 150000004866 oxadiazoles Chemical class 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 125000001567 quinoxalinyl group Chemical group N1=C(C=NC2=CC=CC=C12)* 0.000 description 3
- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical class C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 3
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 2
- OGGKVJMNFFSDEV-UHFFFAOYSA-N 3-methyl-n-[4-[4-(n-(3-methylphenyl)anilino)phenyl]phenyl]-n-phenylaniline Chemical compound CC1=CC=CC(N(C=2C=CC=CC=2)C=2C=CC(=CC=2)C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C=C(C)C=CC=2)=C1 OGGKVJMNFFSDEV-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 0 Cc(cc1)ccc1C(OC(c(cc1)ccc1N(c1ccc(*OC(c2ccc(C(F)(F)F)cc2)=NN)cc1)c(cc1)ccc1-c1nnc(-c2ccc(C(F)(F)F)cc2)[o]1)=N)=N Chemical compound Cc(cc1)ccc1C(OC(c(cc1)ccc1N(c1ccc(*OC(c2ccc(C(F)(F)F)cc2)=NN)cc1)c(cc1)ccc1-c1nnc(-c2ccc(C(F)(F)F)cc2)[o]1)=N)=N 0.000 description 2
- 229920008347 Cellulose acetate propionate Polymers 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- PJANXHGTPQOBST-VAWYXSNFSA-N Stilbene Natural products C=1C=CC=CC=1/C=C/C1=CC=CC=C1 PJANXHGTPQOBST-VAWYXSNFSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 2
- 239000007983 Tris buffer Substances 0.000 description 2
- 125000004390 alkyl sulfonyl group Chemical group 0.000 description 2
- 125000002947 alkylene group Chemical group 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 125000004391 aryl sulfonyl group Chemical group 0.000 description 2
- 125000006267 biphenyl group Chemical group 0.000 description 2
- 125000003917 carbamoyl group Chemical group [H]N([H])C(*)=O 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
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- 229920001940 conductive polymer Polymers 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- ZYGHJZDHTFUPRJ-UHFFFAOYSA-N coumarin Chemical compound C1=CC=C2OC(=O)C=CC2=C1 ZYGHJZDHTFUPRJ-UHFFFAOYSA-N 0.000 description 2
- 125000000753 cycloalkyl group Chemical group 0.000 description 2
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- MTZQAGJQAFMTAQ-UHFFFAOYSA-N ethyl benzoate Chemical compound CCOC(=O)C1=CC=CC=C1 MTZQAGJQAFMTAQ-UHFFFAOYSA-N 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 125000001072 heteroaryl group Chemical group 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 150000002504 iridium compounds Chemical class 0.000 description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 125000004170 methylsulfonyl group Chemical group [H]C([H])([H])S(*)(=O)=O 0.000 description 2
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 239000012044 organic layer Substances 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 125000000538 pentafluorophenyl group Chemical group FC1=C(F)C(F)=C(*)C(F)=C1F 0.000 description 2
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
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- 125000005412 pyrazyl group Chemical group 0.000 description 2
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- 229910052709 silver Inorganic materials 0.000 description 2
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- MFRIHAYPQRLWNB-UHFFFAOYSA-N sodium tert-butoxide Chemical compound [Na+].CC(C)(C)[O-] MFRIHAYPQRLWNB-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
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- 125000004434 sulfur atom Chemical group 0.000 description 2
- 238000001308 synthesis method Methods 0.000 description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
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- 125000006617 triphenylamine group Chemical group 0.000 description 2
- BWHDROKFUHTORW-UHFFFAOYSA-N tritert-butylphosphane Chemical compound CC(C)(C)P(C(C)(C)C)C(C)(C)C BWHDROKFUHTORW-UHFFFAOYSA-N 0.000 description 2
- QGKMIGUHVLGJBR-UHFFFAOYSA-M (4z)-1-(3-methylbutyl)-4-[[1-(3-methylbutyl)quinolin-1-ium-4-yl]methylidene]quinoline;iodide Chemical compound [I-].C12=CC=CC=C2N(CCC(C)C)C=CC1=CC1=CC=[N+](CCC(C)C)C2=CC=CC=C12 QGKMIGUHVLGJBR-UHFFFAOYSA-M 0.000 description 1
- UWRZIZXBOLBCON-VOTSOKGWSA-N (e)-2-phenylethenamine Chemical class N\C=C\C1=CC=CC=C1 UWRZIZXBOLBCON-VOTSOKGWSA-N 0.000 description 1
- VERMWGQSKPXSPZ-BUHFOSPRSA-N 1-[(e)-2-phenylethenyl]anthracene Chemical class C=1C=CC2=CC3=CC=CC=C3C=C2C=1\C=C\C1=CC=CC=C1 VERMWGQSKPXSPZ-BUHFOSPRSA-N 0.000 description 1
- VDPIZIZDKPFXLI-UHFFFAOYSA-N 1-iodo-3,5-bis(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=CC(I)=CC(C(F)(F)F)=C1 VDPIZIZDKPFXLI-UHFFFAOYSA-N 0.000 description 1
- VFMUXPQZKOKPOF-UHFFFAOYSA-N 2,3,7,8,12,13,17,18-octaethyl-21,23-dihydroporphyrin platinum Chemical compound [Pt].CCc1c(CC)c2cc3[nH]c(cc4nc(cc5[nH]c(cc1n2)c(CC)c5CC)c(CC)c4CC)c(CC)c3CC VFMUXPQZKOKPOF-UHFFFAOYSA-N 0.000 description 1
- SULWTXOWAFVWOY-PHEQNACWSA-N 2,3-bis[(E)-2-phenylethenyl]pyrazine Chemical class C=1C=CC=CC=1/C=C/C1=NC=CN=C1\C=C\C1=CC=CC=C1 SULWTXOWAFVWOY-PHEQNACWSA-N 0.000 description 1
- MVWPVABZQQJTPL-UHFFFAOYSA-N 2,3-diphenylcyclohexa-2,5-diene-1,4-dione Chemical class O=C1C=CC(=O)C(C=2C=CC=CC=2)=C1C1=CC=CC=C1 MVWPVABZQQJTPL-UHFFFAOYSA-N 0.000 description 1
- HONWGFNQCPRRFM-UHFFFAOYSA-N 2-n-(3-methylphenyl)-1-n,1-n,2-n-triphenylbenzene-1,2-diamine Chemical compound CC1=CC=CC(N(C=2C=CC=CC=2)C=2C(=CC=CC=2)N(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 HONWGFNQCPRRFM-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- 125000001494 2-propynyl group Chemical group [H]C#CC([H])([H])* 0.000 description 1
- MGADZUXDNSDTHW-UHFFFAOYSA-N 2H-pyran Chemical compound C1OC=CC=C1 MGADZUXDNSDTHW-UHFFFAOYSA-N 0.000 description 1
- BEKFRNOZJSYWKZ-UHFFFAOYSA-N 4-[2-(4-aminophenyl)-1,1,1,3,3,3-hexafluoropropan-2-yl]aniline Chemical compound C1=CC(N)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(N)C=C1 BEKFRNOZJSYWKZ-UHFFFAOYSA-N 0.000 description 1
- ZJSMHFNBMMAKRI-UHFFFAOYSA-N 4-[4-(4-methoxyanilino)phenyl]aniline Chemical group COC1=CC=C(C=C1)NC1=CC=C(C=C1)C1=CC=C(C=C1)N ZJSMHFNBMMAKRI-UHFFFAOYSA-N 0.000 description 1
- AHDTYXOIJHCGKH-UHFFFAOYSA-N 4-[[4-(dimethylamino)-2-methylphenyl]-phenylmethyl]-n,n,3-trimethylaniline Chemical compound CC1=CC(N(C)C)=CC=C1C(C=1C(=CC(=CC=1)N(C)C)C)C1=CC=CC=C1 AHDTYXOIJHCGKH-UHFFFAOYSA-N 0.000 description 1
- 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 1
- DUSWRTUHJVJVRY-UHFFFAOYSA-N 4-methyl-n-[4-[2-[4-(4-methyl-n-(4-methylphenyl)anilino)phenyl]propan-2-yl]phenyl]-n-(4-methylphenyl)aniline Chemical compound C1=CC(C)=CC=C1N(C=1C=CC(=CC=1)C(C)(C)C=1C=CC(=CC=1)N(C=1C=CC(C)=CC=1)C=1C=CC(C)=CC=1)C1=CC=C(C)C=C1 DUSWRTUHJVJVRY-UHFFFAOYSA-N 0.000 description 1
- MVIXNQZIMMIGEL-UHFFFAOYSA-N 4-methyl-n-[4-[4-(4-methyl-n-(4-methylphenyl)anilino)phenyl]phenyl]-n-(4-methylphenyl)aniline Chemical group C1=CC(C)=CC=C1N(C=1C=CC(=CC=1)C=1C=CC(=CC=1)N(C=1C=CC(C)=CC=1)C=1C=CC(C)=CC=1)C1=CC=C(C)C=C1 MVIXNQZIMMIGEL-UHFFFAOYSA-N 0.000 description 1
- XIQGFRHAIQHZBD-UHFFFAOYSA-N 4-methyl-n-[4-[[4-(4-methyl-n-(4-methylphenyl)anilino)phenyl]-phenylmethyl]phenyl]-n-(4-methylphenyl)aniline Chemical compound C1=CC(C)=CC=C1N(C=1C=CC(=CC=1)C(C=1C=CC=CC=1)C=1C=CC(=CC=1)N(C=1C=CC(C)=CC=1)C=1C=CC(C)=CC=1)C1=CC=C(C)C=C1 XIQGFRHAIQHZBD-UHFFFAOYSA-N 0.000 description 1
- ZYASLTYCYTYKFC-UHFFFAOYSA-N 9-methylidenefluorene Chemical class C1=CC=C2C(=C)C3=CC=CC=C3C2=C1 ZYASLTYCYTYKFC-UHFFFAOYSA-N 0.000 description 1
- VIJYEGDOKCKUOL-UHFFFAOYSA-N 9-phenylcarbazole Chemical compound C1=CC=CC=C1N1C2=CC=CC=C2C2=CC=CC=C21 VIJYEGDOKCKUOL-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- RDRWQDOGNJNJMR-UHFFFAOYSA-N Cc(cc(cc1)N(c2ccccc2)c2c(cccc3)c3ccc2)c1-c(c(C(F)(F)F)c1)ccc1N(c1ccccc1)c1c(cccc2)c2ccc1 Chemical compound Cc(cc(cc1)N(c2ccccc2)c2c(cccc3)c3ccc2)c1-c(c(C(F)(F)F)c1)ccc1N(c1ccccc1)c1c(cccc2)c2ccc1 RDRWQDOGNJNJMR-UHFFFAOYSA-N 0.000 description 1
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- 241000284156 Clerodendrum quadriloculare Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004057 DFT-B3LYP calculation Methods 0.000 description 1
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- 125000001725 pyrenyl group Chemical group 0.000 description 1
- 125000005548 pyrenylene group Chemical group 0.000 description 1
- 125000005495 pyridazyl group Chemical group 0.000 description 1
- 125000005400 pyridylcarbonyl group Chemical group N1=C(C=CC=C1)C(=O)* 0.000 description 1
- 125000000714 pyrimidinyl group Chemical group 0.000 description 1
- WVIICGIFSIBFOG-UHFFFAOYSA-N pyrylium Chemical compound C1=CC=[O+]C=C1 WVIICGIFSIBFOG-UHFFFAOYSA-N 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 125000002294 quinazolinyl group Chemical group N1=C(N=CC2=CC=CC=C12)* 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical class C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
- DLJHXMRDIWMMGO-UHFFFAOYSA-N quinolin-8-ol;zinc Chemical compound [Zn].C1=CN=C2C(O)=CC=CC2=C1.C1=CN=C2C(O)=CC=CC2=C1 DLJHXMRDIWMMGO-UHFFFAOYSA-N 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000001022 rhodamine dye Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 150000001629 stilbenes Chemical class 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 238000005556 structure-activity relationship Methods 0.000 description 1
- 125000005504 styryl group Chemical group 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000000475 sulfinyl group Chemical group [*:2]S([*:1])=O 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 229940042055 systemic antimycotics triazole derivative Drugs 0.000 description 1
- 125000006836 terphenylene group Chemical group 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 150000004867 thiadiazoles Chemical class 0.000 description 1
- 125000000335 thiazolyl group Chemical group 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- IBBLKSWSCDAPIF-UHFFFAOYSA-N thiopyran Chemical compound S1C=CC=C=C1 IBBLKSWSCDAPIF-UHFFFAOYSA-N 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 125000005259 triarylamine group Chemical group 0.000 description 1
- 125000002889 tridecyl 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])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000000025 triisopropylsilyl group Chemical group C(C)(C)[Si](C(C)C)(C(C)C)* 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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Description
第2図は表示部の模式図である。
第3図は画素の模式図である。
第4図はパッシブマトリクス方式フルカラー表示装置の模式図である。
第5図は照明装置の概略図である。
第6図は照明装置の断面図である。
(i)陽極/発光層/電子輸送層/陰極
(ii)陽極/正孔輸送層/発光層/電子輸送層/陰極
(iii)陽極/正孔輸送層/発光層/正孔阻止層/電子輸送層/陰極
(iv)陽極/正孔輸送層/発光層/正孔阻止層/電子輸送層/陰極バッファー層/陰極(v)陽極/陽極バッファー層/正孔輸送層/発光層/正孔阻止層/電子輸送層/陰極バッファー層/陰極
〈陽極〉
有機EL素子における陽極としては、仕事関数の大きい(4eV以上)金属、合金、電気伝導性化合物及びこれらの混合物を電極物質とするものが好ましく用いられる。このような電極物質の具体例としてはAu等の金属、CuI、インジウムチンオキシド(ITO)、SnO2、ZnO等の導電性透明材料が挙げられる。また、IDIXO(In2O3−ZnO)等非晶質で透明導電膜を作製可能な材料を用いてもよい。陽極は、これらの電極物質を蒸着やスパッタリング等の方法により、薄膜を形成させ、フォトリソグラフィー法で所望の形状のパターンを形成してもよく、あるいはパターン精度をあまり必要としない場合は(100μm以上程度)、上記電極物質の蒸着やスパッタリング時に所望の形状のマスクを介してパターンを形成してもよい。この陽極より発光を取り出す場合には、透過率を10%より大きくすることが望ましく、また、陽極としてのシート抵抗は数百Ω/□以下が好ましい。さらに膜厚は材料にもよるが、通常10〜1000nm、好ましくは10〜200nmの範囲で選ばれる。
〈陰極〉
一方、陰極としては、仕事関数の小さい(4eV以下)金属(電子注入性金属と称する)、合金、電気伝導性化合物及びこれらの混合物を電極物質とするものが用いられる。このような電極物質の具体例としては、ナトリウム、ナトリウム−カリウム合金、マグネシウム、リチウム、マグネシウム/銅混合物、マグネシウム/銀混合物、マグネシウム/アルミニウム混合物、マグネシウム/インジウム混合物、アルミニウム/酸化アルミニウム(Al2O3)混合物、インジウム、リチウム/アルミニウム混合物、希土類金属等が挙げられる。これらの中で、電子注入性及び酸化等に対する耐久性の点から、電子注入性金属とこれより仕事関数の値が大きく安定な金属である第二金属との混合物、例えばマグネシウム/銀混合物、マグネシウム/アルミニウム混合物、マグネシウム/インジウム混合物、アルミニウム/酸化アルミニウム(Al2O3)混合物、リチウム/アルミニウム混合物、アルミニウム等が好適である。陰極は、これらの電極物質を蒸着やスパッタリング等の方法により薄膜を形成させることにより、作製することができる。また、陰極としてのシート抵抗は数百Ω/□以下が好ましく、膜厚は通常10nm〜5μm、好ましくは50〜200nmの範囲で選ばれる。なお、発光した光を透過させるため、有機EL素子の陽極または陰極のいずれか一方が、透明または半透明であれば発光輝度が向上し好都合である。
〈バッファー層〉:陰極バッファー層、陽極バッファー層
注入層は必要に応じて設け、陰極バッファー層(電子注入層)と陽極バッファー層(正孔注入層)があり、上記のごとく陽極と発光層または正孔輸送層の間、及び、陰極と発光層または電子輸送層との間に存在させてもよい。バッファー層とは、駆動電圧低下や発光輝度向上のために電極と有機層間に設けられる層のことで、「有機EL素子とその工業化最前線(1998年11月30日エヌ・ティー・エス社発行)」の第2編第2章「電極材料」(123〜166頁)に詳細に記載されており、陽極バッファー層と陰極バッファー層とがある。
〈阻止層〉:正孔阻止層、電子阻止層
正孔阻止層とは広い意味では電子輸送層であり、発光層に隣接して設けられている。正孔阻止層は電子を輸送する機能を有しつつ正孔を輸送する能力が著しく小さい正孔阻止材料からなり、電子を輸送しつつ正孔を阻止することで電子と正孔の再結合確率を向上させることができる。
〈発光層〉
本発明に係る発光層は、リン光性化合物を含有し、電極または電子輸送層、正孔輸送層から注入されてくる電子及び正孔が再結合して発光する層であり、発光する部分は発光層の層内であっても発光層と隣接層との界面であってもよい。リン光性化合物を用いることで、発光効率の高い有機EL素子とすることができる。リン光性化合物は、前述したリン光性化合物を用いることができる。
X1−(A1)n
[式中、−A1は下記一般式(CA2)で表され、同一でも異なってもよい。]
〈正孔輸送層〉
正孔輸送層とは正孔を輸送する機能を有する正孔輸送材料からなり、広い意味で正孔注入層、電子阻止層も正孔輸送層に含まれる。正孔輸送層は単層または複数層設けることができる。正孔輸送材料としては、正孔の注入または輸送、電子の障壁性のいずれかを有するものであり、有機物、無機物のいずれであってもよい。例えばトリアゾール誘導体、オキサジアゾール誘導体、イミダゾール誘導体、ポリアリールアルカン誘導体、ピラゾリン誘導体及びピラゾロン誘導体、フェニレンジアミン誘導体、アリールアミン誘導体、アミノ置換カルコン誘導体、オキサゾール誘導体、スチリルアントラセン誘導体、フルオレノン誘導体、ヒドラゾン誘導体、スチルベン誘導体、シラザン誘導体、アニリン系共重合体、また、導電性高分子オリゴマー、特にチオフェンオリゴマー等が挙げられる。正孔輸送材料としては、上記のものを使用することができるが、ポルフィリン化合物、芳香族第三級アミン化合物及びスチリルアミン化合物、特に芳香族第三級アミン化合物を用いることが好ましい。
〈電子輸送層〉
電子輸送層とは電子を輸送する機能を有する材料からなり、広い意味で電子注入層、正孔阻止層も電子輸送層に含まれる。電子輸送層は単層または複数層設けることができる。また、層構成の(i)、(ii)のように有機EL素子に正孔阻止層を設けず、発光層に隣接するのが電子輸送層(この場合は電子輸送層が正孔阻止層も兼ねている)であるような場合には、電子輸送層の電子輸送材料として前述したHOMOが−5.7eV〜−7.0eV、LUMOが−1.3〜−2.3eVを満たし電子吸引基を有する化合物を用いることで高い発光輝度、発光効率を有し、長寿命である有機EL素子とすることができる。層構成の(iii)、(iv)、(v)のように有機EL素子の発光層に隣接して正孔阻止層が設けられているような場合は、電子輸送層は、従来電子輸送層に用いられている電子輸送材料を用いることができる。電子輸送材料としては、陰極より注入された電子を発光層に伝達する機能を有していればよく、その材料としては従来公知の化合物の中から任意のものを選択して用いることができ、例えば、ニトロ置換フルオレン誘導体、ジフェニルキノン誘導体、チオピランジオキシド誘導体、カルボジイミド、フレオレニリデンメタン誘導体、アントラキノジメタン及びアントロン誘導体、オキサジアゾール誘導体等が挙げられる。さらに、上記オキサジアゾール誘導体において、オキサジアゾール環の酸素原子を硫黄原子に置換したチアジアゾール誘導体、電子吸引基として知られているキノキサリン環を有するキノキサリン誘導体も、電子輸送材料として用いることができる。
〈基体(基板、基材、支持体等ともいう)〉
本発明の有機EL素子は基体上に形成されているのが好ましい。
〈有機EL素子の作製方法〉
本発明の有機EL素子の作製方法の一例として、陽極/陽極バッファー層/正孔輸送層/発光層/正孔阻止層/電子輸送層/陰極バッファー層/陰極からなる有機EL素子の作製法について説明する。
〈表示装置〉
本発明の有機EL素子は、照明用や露光光源のような1種のランプとして使用してもよいし、画像を投影するタイプのプロジェクション装置や、静止画像や動画像を直接視認するタイプの表示装置(ディスプレイ)として使用してもよい。動画再生用の表示装置として使用する場合の駆動方式は単純マトリクス(パッシブマトリクス)方式でもアクティブマトリクス方式でもどちらでもよい。または、異なる発光色を有する本発明の有機EL素子を3種以上使用することにより、フルカラー表示装置を作製することが可能である。または、一色の発光色、例えば白色発光をカラーフィルターを用いてBGRにし、フルカラー化することも可能である。さらに、有機ELの発光色を色変換フィルターを用いて他色に変換しフルカラー化することも可能であるが、その場合、有機EL発光のλmaxは480nm以下であることが好ましい。
[実施例1]
〈有機EL素子1−1〜16の作製〉
陽極として100mm×100mm×1.1mmのガラス基板上にITO(インジウムチンオキシド)を100nm製膜した基板(NHテクノグラス社製NA45)にパターニングを行った後、このITO透明電極を設けた透明支持基板をイソプロピルアルコールで超音波洗浄し、乾燥窒素ガスで乾燥し、UVオゾン洗浄を5分間行なった。この透明支持基板を市販の真空蒸着装置の基板ホルダーに固定し、一方、モリブデン製抵抗加熱ボートにm−MTDATXAを200mg入れ、別のモリブデン製抵抗加熱ボートにATCBPを200mg入れ、別のモリブデン製抵抗加熱ボートにバソキュプロイン(BC)を200mg入れ、別のモリブデン製抵抗加熱ボートにIr−12を100mg入れ、更に別のモリブデン製抵抗加熱ボートにAlq3を200mg入れ、真空蒸着装置に取付けた。
以下のようにして作製した有機EL素子1−1〜1−16の評価を行い、その結果を表1に示す。
(発光輝度)
分光放射輝度計CS−1000(ミノルタ製)で測定した輝度を用いて発光輝度(cd/m2)を求めた。
(外部取りだし量子効率)
作製した有機EL素子について、23℃、乾燥窒素ガス雰囲気下で2.5mA/cm2定電流を印加した時の外部取り出し量子効率(%)を測定した。なお測定には同様に分光放射輝度計CS−1000(ミノルタ製)を用いた。
(発光寿命)
23℃、乾燥窒素ガス雰囲気下で2.5mA/cm2の一定電流で駆動したときに、輝度が発光開始直後の輝度(初期輝度)の半分に低下するのに要した時間を測定し、これを半減寿命時間(τ0.5)として寿命の指標とした。なお測定には分光放射輝度計CS−1000(ミノルタ製)を用いた。表1の輝度、外部取り出し量子効率、発光寿命の測定結果は、有機EL素子1−1を100とした時の相対値で表した。
[実施例2]
〈有機EL素子2−1〜14の製作〉
陽極として100mm×100mm×1.1mmのガラス基板上にITO(インジウムチンオキシド)を100nm製膜した基板(NHテクノグラス社製NA45)にパターニングを行った後、このITO透明電極を設けた透明支持基板をイソプロピルアルコールで超音波洗浄し、乾燥窒素ガスで乾燥し、UVオゾン洗浄を5分間行った。この透明支持基板を市販の真空蒸着装置の基板ホルダーに固定し、一方、モリブデン製抵抗加熱ボートにm−MTDATXAを200mg入れ、別のモリブデン製加熱ボートにACZ1を200mg入れ、別のモリブデン製抵抗加熱ボートにバソキュプロイン(BC)を200mg入れ、別のモリブデン製抵抗加熱ボートにIr−12を100mg入れ、更に別のモリブデン製抵抗加熱ボートにAlq3を200mg入れ、真空蒸着装置に取り付けた。
以下のようにして作製した有機EL素子2−1〜2−14の評価を行い、その結果を表2に示す。
(発光輝度)
分光放射輝度計CS−1000(ミノルタ製)で測定した輝度を用いて発光輝度(cd/m2)を求めた。
(外部取りだし量子効率)
作製した有機EL素子について、23℃、乾燥窒素ガス雰囲気下で2.5mA/cm2定電流を印加した時の外部取り出し量子効率(%)を測定した。なお測定には同様に分光放射輝度計CS−1000(ミノルタ製)を用いた。
(発光寿命)
23℃、乾燥窒素ガス雰囲気下で2.5mA/cm2の一定電流で駆動したときに、輝度が発光開始直後の輝度(初期輝度)の半分に低下するのに要した時間を測定し、これを半減寿命時間(τ0.5)として寿命の指標とした。なお測定には分光放射輝度計CS−1000(ミノルタ製)を用いた。表2の輝度、外部取り出し量子効率、発光寿命の測定結果は、有機EL素子2−1を100とした時の相対値で表した。
[実施例3]
〈フルカラー表示装置の作製〉
フルカラー表示装置(1)
(青色発光有機EL素子)
実施例1で作製した有機EL素子1−8を用いた。
(緑色発光有機EL素子)
実施例1で作製した有機EL素子1−8において、Ir−12に替えてIr−1を用いた以外は、有機EL素子1−8と同様の方法で作製した有機EL素子1−8Gを用いた。(赤色発光有機EL素子)
実施例1で作製した有機EL素子1−8において、Ir−12に替えてIr−9を用いた以外は、有機EL素子1−8と同様の方法で作製した有機EL素子1−8Rを用いた。上記の赤色、緑色及び青色発光有機EL素子を、同一基板上に並置し、第1図に記載の形態を有するアクティブマトリクス方式フルカラー表示装置を作製し、第2図には、作製した前記表示装置の表示部Aの模式図のみを示した。即ち、同一基板上に、複数の走査線5及びデータ線6を含む配線部と、並置した複数の画素3(発光の色が赤領域の画素、緑領域の画素、青領域の画素等)とを有し、配線部の走査線5及び複数のデータ線6はそれぞれ導電材料からなり、走査線5とデータ線6は格子状に直交して、直交する位置で画素3に接続している(詳細は図示せず)。前記複数の画素3は、それぞれの発光色に対応した有機EL素子、アクティブ素子であるスイッチングトランジスタと駆動トランジスタそれぞれが設けられたアクティブマトリクス方式で駆動されており、走査線5から走査信号が印加されると、データ線6から画像データ信号を受け取り、受け取った画像データに応じて発光する。この様に各赤、緑、青の画素を適宜、並置することによって、フルカラー表示装置を作製した。
[実施例4]
実施例1で作製した有機EL素子1−8において、Ir−12に替えてIr−6、Ir−12(Ir−6:Ir−12=1:4)を用いた以外は、有機EL素子1−8と同様の方法で作製した有機EL素子1−8Wを作製した。
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JP2003045663A (ja) * | 2001-08-02 | 2003-02-14 | Univ Osaka | エレクトロルミネッセンス素子用材料、アモルファス膜、及びエレクトロルミネッセンス素子 |
JP2003086376A (ja) * | 2001-09-06 | 2003-03-20 | Nippon Hoso Kyokai <Nhk> | 有機エレクトロルミネッセンスデバイスおよびその製造方法 |
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WO2005004549A1 (ja) | 2005-01-13 |
US7371469B2 (en) | 2008-05-13 |
CN1817066A (zh) | 2006-08-09 |
EP1651013A1 (en) | 2006-04-26 |
US7862909B2 (en) | 2011-01-04 |
US20080233431A1 (en) | 2008-09-25 |
CN100556224C (zh) | 2009-10-28 |
JPWO2005004549A1 (ja) | 2006-08-24 |
US20070099025A1 (en) | 2007-05-03 |
EP1651013A4 (en) | 2008-07-23 |
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