JP2009170812A - 有機電界発光素子 - Google Patents
有機電界発光素子 Download PDFInfo
- Publication number
- JP2009170812A JP2009170812A JP2008009909A JP2008009909A JP2009170812A JP 2009170812 A JP2009170812 A JP 2009170812A JP 2008009909 A JP2008009909 A JP 2008009909A JP 2008009909 A JP2008009909 A JP 2008009909A JP 2009170812 A JP2009170812 A JP 2009170812A
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- JP
- Japan
- Prior art keywords
- group
- layer
- organic electroluminescent
- light emitting
- phenyl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 239000010410 layer Substances 0.000 claims abstract description 243
- 239000000463 material Substances 0.000 claims abstract description 53
- 239000002346 layers by function Substances 0.000 claims abstract description 13
- -1 fluorene compound Chemical group 0.000 claims description 661
- 238000002347 injection Methods 0.000 claims description 58
- 239000007924 injection Substances 0.000 claims description 58
- 238000005401 electroluminescence Methods 0.000 claims description 45
- 125000003118 aryl group Chemical group 0.000 claims description 25
- 125000000217 alkyl group Chemical group 0.000 claims description 21
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 20
- 125000006165 cyclic alkyl group Chemical group 0.000 claims description 18
- 230000005525 hole transport Effects 0.000 claims description 16
- 125000001424 substituent group Chemical group 0.000 claims description 11
- NIHNNTQXNPWCJQ-UHFFFAOYSA-N o-biphenylenemethane Natural products C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 claims description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 229910052723 transition metal Inorganic materials 0.000 claims description 4
- 150000003624 transition metals Chemical class 0.000 claims description 4
- 229910052741 iridium Inorganic materials 0.000 claims description 3
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 abstract description 118
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 39
- 239000000758 substrate Substances 0.000 description 32
- 238000000151 deposition Methods 0.000 description 31
- 230000008021 deposition Effects 0.000 description 31
- 238000007740 vapor deposition Methods 0.000 description 25
- 229910052782 aluminium Inorganic materials 0.000 description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 23
- 125000004432 carbon atom Chemical group C* 0.000 description 22
- 230000000903 blocking effect Effects 0.000 description 16
- 238000000034 method Methods 0.000 description 16
- 239000012298 atmosphere Substances 0.000 description 14
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 11
- 239000007772 electrode material Substances 0.000 description 11
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 10
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 10
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 10
- 238000000576 coating method Methods 0.000 description 9
- 239000010408 film Substances 0.000 description 9
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 8
- 230000005281 excited state Effects 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 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 8
- 239000007983 Tris buffer Substances 0.000 description 7
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 7
- 125000005843 halogen group Chemical group 0.000 description 7
- 239000003446 ligand Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
- 125000003277 amino group Chemical group 0.000 description 6
- 125000002102 aryl alkyloxo group Chemical group 0.000 description 6
- 125000004104 aryloxy group Chemical group 0.000 description 6
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 6
- 239000002356 single layer Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 125000005259 triarylamine group Chemical group 0.000 description 6
- 125000001637 1-naphthyl group Chemical group [H]C1=C([H])C([H])=C2C(*)=C([H])C([H])=C([H])C2=C1[H] 0.000 description 5
- DHDHJYNTEFLIHY-UHFFFAOYSA-N 4,7-diphenyl-1,10-phenanthroline Chemical compound C1=CC=CC=C1C1=CC=NC2=C1C=CC1=C(C=3C=CC=CC=3)C=CN=C21 DHDHJYNTEFLIHY-UHFFFAOYSA-N 0.000 description 5
- VFUDMQLBKNMONU-UHFFFAOYSA-N 9-[4-(4-carbazol-9-ylphenyl)phenyl]carbazole Chemical group 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 5
- 125000003545 alkoxy group Chemical group 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 5
- 125000004122 cyclic group Chemical group 0.000 description 5
- 125000002524 organometallic group Chemical group 0.000 description 5
- 229920000123 polythiophene Polymers 0.000 description 5
- 238000001771 vacuum deposition Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 0 C*C1(**)c2cc(-c(cc34)ccc3-c3ccccc3C4(c3ccccc3)c3ccccc3)ccc2C2C=CC(c3ccc4-c5ccc(C6C=C(C(c7ccccc77)(c8ccccc8)c8ccccc8)C7=CC6)cc5C(**)(*N)c4c3)=CC12 Chemical compound C*C1(**)c2cc(-c(cc34)ccc3-c3ccccc3C4(c3ccccc3)c3ccccc3)ccc2C2C=CC(c3ccc4-c5ccc(C6C=C(C(c7ccccc77)(c8ccccc8)c8ccccc8)C7=CC6)cc5C(**)(*N)c4c3)=CC12 0.000 description 4
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 125000006615 aromatic heterocyclic group Chemical group 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000013256 coordination polymer Substances 0.000 description 4
- 239000003599 detergent Substances 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 125000005678 ethenylene group Chemical group [H]C([*:1])=C([H])[*:2] 0.000 description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 4
- 125000001624 naphthyl group Chemical group 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 229910052763 palladium Inorganic materials 0.000 description 4
- 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 4
- 229920003227 poly(N-vinyl carbazole) Polymers 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- 229910021642 ultra pure water Inorganic materials 0.000 description 4
- 239000012498 ultrapure water Substances 0.000 description 4
- 238000004506 ultrasonic cleaning Methods 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- VQGHOUODWALEFC-UHFFFAOYSA-N 2-phenylpyridine Chemical compound C1=CC=CC=C1C1=CC=CC=N1 VQGHOUODWALEFC-UHFFFAOYSA-N 0.000 description 3
- 125000000590 4-methylphenyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1*)C([H])([H])[H] 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 150000004945 aromatic hydrocarbons Chemical group 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 3
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 3
- 125000005708 carbonyloxy group Chemical group [*:2]OC([*:1])=O 0.000 description 3
- 125000004093 cyano group Chemical group *C#N 0.000 description 3
- 125000003754 ethoxycarbonyl group Chemical group C(=O)(OCC)* 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 230000005283 ground state Effects 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 239000011147 inorganic material Substances 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 125000001160 methoxycarbonyl group Chemical group [H]C([H])([H])OC(*)=O 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 125000001820 oxy group Chemical group [*:1]O[*:2] 0.000 description 3
- 125000005740 oxycarbonyl group Chemical group [*:1]OC([*:2])=O 0.000 description 3
- 125000003854 p-chlorophenyl group Chemical group [H]C1=C([H])C(*)=C([H])C([H])=C1Cl 0.000 description 3
- 229920000553 poly(phenylenevinylene) Polymers 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 238000005215 recombination Methods 0.000 description 3
- 230000006798 recombination Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- CYPYTURSJDMMMP-WVCUSYJESA-N (1e,4e)-1,5-diphenylpenta-1,4-dien-3-one;palladium Chemical compound [Pd].[Pd].C=1C=CC=CC=1\C=C\C(=O)\C=C\C1=CC=CC=C1.C=1C=CC=CC=1\C=C\C(=O)\C=C\C1=CC=CC=C1.C=1C=CC=CC=1\C=C\C(=O)\C=C\C1=CC=CC=C1 CYPYTURSJDMMMP-WVCUSYJESA-N 0.000 description 2
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 description 2
- BCMCBBGGLRIHSE-UHFFFAOYSA-N 1,3-benzoxazole Chemical compound C1=CC=C2OC=NC2=C1 BCMCBBGGLRIHSE-UHFFFAOYSA-N 0.000 description 2
- QPUYECUOLPXSFR-UHFFFAOYSA-N 1-methylnaphthalene Chemical compound C1=CC=C2C(C)=CC=CC2=C1 QPUYECUOLPXSFR-UHFFFAOYSA-N 0.000 description 2
- IYBLVRRCNVHZQJ-UHFFFAOYSA-N 5-Hydroxyflavone Chemical class C=1C(=O)C=2C(O)=CC=CC=2OC=1C1=CC=CC=C1 IYBLVRRCNVHZQJ-UHFFFAOYSA-N 0.000 description 2
- MZYDBGLUVPLRKR-UHFFFAOYSA-N 9-(3-carbazol-9-ylphenyl)carbazole Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC(N2C3=CC=CC=C3C3=CC=CC=C32)=CC=C1 MZYDBGLUVPLRKR-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
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- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 229910000846 In alloy Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
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- ISZWRZGKEWQACU-UHFFFAOYSA-N Primuletin Natural products OC1=CC=CC(C=2OC3=CC=CC=C3C(=O)C=2)=C1 ISZWRZGKEWQACU-UHFFFAOYSA-N 0.000 description 2
- KYQCOXFCLRTKLS-UHFFFAOYSA-N Pyrazine Chemical compound C1=CN=CC=N1 KYQCOXFCLRTKLS-UHFFFAOYSA-N 0.000 description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- PYQBNSSKFSDQOT-UHFFFAOYSA-K [Al+3].C(C)(C)(C)C=1C=C(C=C(C1)C(C)(C)C)[O-].C(C)(C)(C)C=1C=C(C=C(C1)C(C)(C)C)[O-].C(C)(C)(C)C=1C=C(C=C(C1)C(C)(C)C)[O-] Chemical compound [Al+3].C(C)(C)(C)C=1C=C(C=C(C1)C(C)(C)C)[O-].C(C)(C)(C)C=1C=C(C=C(C1)C(C)(C)C)[O-].C(C)(C)(C)C=1C=C(C=C(C1)C(C)(C)C)[O-] PYQBNSSKFSDQOT-UHFFFAOYSA-K 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
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- 125000002029 aromatic hydrocarbon group Chemical group 0.000 description 2
- 229910052790 beryllium Inorganic materials 0.000 description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 2
- 150000001642 boronic acid derivatives Chemical class 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 2
- DIOQZVSQGTUSAI-UHFFFAOYSA-N decane Chemical compound CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 125000004185 ester group Chemical group 0.000 description 2
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 2
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 description 2
- 125000001153 fluoro group Chemical group F* 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
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- 229910052738 indium Inorganic materials 0.000 description 2
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- 150000007529 inorganic bases Chemical class 0.000 description 2
- 125000005956 isoquinolyl group Chemical group 0.000 description 2
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- 150000004706 metal oxides Chemical class 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- IBHBKWKFFTZAHE-UHFFFAOYSA-N n-[4-[4-(n-naphthalen-1-ylanilino)phenyl]phenyl]-n-phenylnaphthalen-1-amine Chemical group 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
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
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- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical class 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
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- 229920002647 polyamide Polymers 0.000 description 2
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- 229920006380 polyphenylene oxide Polymers 0.000 description 2
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- 229910000027 potassium carbonate Inorganic materials 0.000 description 2
- 235000011181 potassium carbonates Nutrition 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 2
- 125000004076 pyridyl group Chemical group 0.000 description 2
- 125000005493 quinolyl group Chemical group 0.000 description 2
- XSCHRSMBECNVNS-UHFFFAOYSA-N quinoxaline Chemical compound N1=CC=NC2=CC=CC=C21 XSCHRSMBECNVNS-UHFFFAOYSA-N 0.000 description 2
- 229910052707 ruthenium Inorganic materials 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
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- 238000004544 sputter deposition Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 125000004149 thio group Chemical group *S* 0.000 description 2
- 229910001887 tin oxide Inorganic materials 0.000 description 2
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Abstract
Description
Appl.Phys.Lett.,51,913(1987) J.Appl.Phys.,65,3610(1989) Appl.Phys.Lett.,70,1665(1997) Jpn.J.Appl.Phys.,34,L824(1995) Appl.Phys.Lett.,74,442(1999) Appl.Phys.Lett.,75,4(1999)
[1]一対の電極間に、発光層を含む機能層を挟持してなる有機電界発光素子であって、
前記発光層は燐光発光材料を含有し、
前記機能層のいずれかの層は、一般式(1)で表されるフルオレン化合物の少なくとも1種を含有する、有機電界発光素子。
R1〜R6は、それぞれ独立に置換基を表し、R1〜R6はそれぞれ隣接する基と共に、環を形成していてもよく、
n1〜n6は0または1〜3の整数を表し、
AおよびBは、直鎖、分岐鎖または環状のアルキル基、置換または未置換のアリール基あるいは置換または未置換のアラルキル基を表すが、AとBは互いに同一の基ではなく
nは1または2を表す。
ただし、AおよびBがいずれもアリール基である場合は除かれる。
また、発光層に含まれる化合物の正孔注入機能や正孔輸送機能が十分でない場合には、発光層の陽極側に正孔注入輸送層を設けた二層型の素子とすることが好ましい。一方、発光層に含まれる化合物の電子注入機能や電子輸送機能が十分でない場合には、発光層の陰極側に電子注入輸送層を設けた二層型の素子とすることができる。もちろん、発光層を、正孔注入輸送層と電子注入輸送層で挟み込んだ三層型の素子とすることもできる。
図1には、基板1/陽極2/正孔注入輸送層3/発光層4/電子注入輸送層5/陰極6と、電源7を含む素子(EL−1)が;図2には、基板1/陽極2/正孔注入輸送層3/発光層4/陰極6と、電源7を含む素子(EL−2)が;図3には、基板1/陽極2/発光層4/電子注入輸送層5/陰極6と、電源7を含む素子(EL−3)が;図4には、基板1/陽極2/発光層4/陰極型6と、電源7を含む素子(EL−4)が示される。
本発明の有機発光素子の発光層は、燐光発光材料を含む。燐光発光材料は、発光層においてドーパント材料(またはゲスト材料)として作用することが好ましい。発光層に含有される燐光発光材料は、一種単独でも、二種以上の組合せでもよい。燐光発光材料は、特に限定されないが、遷移金属錯体であることが好ましい。遷移金属錯体の例には、下記一般式(a−1)または一般式(a−2)で表される化合物が含まれる。
本発明の有機電界発光素子は、一対の電極に狭持される機能層の、少なくともいずれかの一層に、一般式(1)で表される化合物を含む。一般式(1)で表される化合物は、正孔注入輸送層および/または発光層に含まれることが好ましく、発光層に含まれることがより好ましい。発光層に含まれる一般式(1)で表される化合物は、ホスト材料として作用することが好ましい。
式(1)におけるAおよびBは、直鎖、分岐または環状のアルキル基、置換または未置換のアリール基あるいは置換または未置換のアラルキル基を表す。ただし、AとBは互いに同一の基ではない。さらに、AとBのいずれもが、アリール基である場合は除かれる。
式(1)におけるnは、1または2を表す。
R1〜R6が表す置換基は、水素原子;ハロゲン原子;シアノ基;ニトロ基;置換または未置換のアミノ基;エステル基;炭素数1〜10の直鎖、分岐または環状のアルキル基;炭素数1〜10の直鎖、分岐または環状のアルコキシ基;炭素数7〜20の置換または未置換のアラルキル基;炭素数7〜20の置換または未置換のアラルキルオキシ基;炭素数4〜20の置換または未置換のアリール基;または炭素数4〜20の置換または未置換のアリールオキシ基であることが好ましい。
R1〜R6が表す置換基は、水素原子;ハロゲン原子;シアノ基;ニトロ基;置換または未置換のアミノ基;炭素数1〜8の直鎖、分岐または環状のアルキル基;炭素数1〜8の直鎖、分岐または環状のアルコキシ基;炭素数7〜16の置換または未置換のアラルキル基;炭素数7〜16の置換または未置換のアラルキルオキシ基;炭素数4〜16の置換または未置換のアリール基;または炭素数4〜16の置換または未置換のアリールオキシ基であることがより好ましい。
1.Aが直鎖、分岐または環状のアルキル基、BがAとは異なる直鎖、分岐または環状のアルキル基の組合せ
1−1.Aが直鎖または分岐のアルキル基、Bが環状のアルキル基の組合せ
1−2.Aが環状のアルキル基、Bが直鎖または分岐のアルキル基の組合せ
1−3.Aが直鎖のアルキル基、Bが分岐のアルキル基の組合せ
1−4.Aが分岐のアルキル基、Bが直鎖のアルキル基の組合せ
2.Aが直鎖、分岐または環状のアルキル基、Bが置換または未置換のアリール基の組合せ
3 Aが置換または未置換のアリール基、Bが直鎖、分岐または環状のアルキル基の組合せ
4.Aが直鎖、分岐または環状のアルキル基、Bが置換または未置換のアラルキル基の組合せ
5.Aが置換または未置換のアラルキル基、Bが直鎖、分岐または環状のアルキル基の組合せ
6.Aが置換または未置換のアラルキル基、Bが置換または未置換のアリール基の組合せ
7.Aが置換または未置換のアリール基、Bが置換または未置換のアラルキル基の組合せ
8.Aが置換または未置換のアラルキル基、BがAとは異なる置換または未置換のアラルキル基の組合せ
(式(a)におけるQは、置換または未置換の8-キノリノラート配位子を表す)
(Q)2−Al−O−L’ ・・・(b)
(式(b)におけるQは、置換または未置換の8-キノリノラート配位子を表し、O−L’はフェノラート配位子を表し、L’はフェニル基を有する炭素数6〜24の炭化水素基を表す)
(Q)2−Al−O−Al−(Q)2 ・・・(c)
(式(c)におけるQは、置換または未置換の8-キノリノラート配位子を表す)
バインダー樹脂を使用する場合、塗布液におけるその含有量は特に限定されない。正孔注入輸送層、発光層、電子注入輸送層等の各層を形成する成分の合計に対するバインダー樹脂の含有率は、通常は5〜99.9重量%であり、好ましくは10〜99重量%である。
厚さ150nmのITO透明電極(陽極)を有するガラス基板を、中性洗剤、セミコクリーン(フルウチ化学製)、超純水、アセトン、イソプロパノールを用いて超音波洗浄した。この基板を窒素ガスにより乾燥し、さらにUV/オゾン洗浄した後、蒸着装置の基板ホルダーに固定し、蒸着槽を1×10−5Paに減圧した。
実施例1において、発光層の形成に際して例示化合物A−4の化合物を使用する代わりに、下記の化合物(CBP)を使用した以外は、実施例1に記載の操作に従い、有機電界発光素子を作製した。
実施例1において、例示化合物A−4の化合物を使用する変わりに、例示化合物A−9の化合物を使用した以外は、実施例1に記載の操作に従い、有機電界発光素子を作製した。
実施例1において、発光層の形成に際して例示化合物A−4の化合物を使用する代わりに、下記の4,4'−ビス[N-(1-ナフチル)-N-フェニルアミノ]ビフェニル(α−NPD)を使用した以外は、実施例1に記載の操作に従い、有機電界発光素子を作製した。
実施例1において、例示化合物A−4の化合物を使用する変わりに、例示化合物A−21の化合物を使用した以外は、実施例1に記載の操作に従い、有機電界発光素子を作製した。
実施例1において、例示化合物A−4の化合物を使用する変わりに、例示化合物A−26の化合物を使用した以外は、実施例1に記載の操作に従い、有機電界発光素子を作製した。
厚さ150nmのITO透明電極(陽極)を有するガラス基板を、中性洗剤、セミコクリーン(フルウチ化学製)、超純水、アセトン、イソプロパノールを用いて超音波洗浄した。この基板を窒素ガスにより乾燥し、さらにUV/オゾン洗浄した後、蒸着装置の基板ホルダーに固定し、蒸着槽を1×10−5Paに減圧した。
実施例5において、例示化合物B−9の化合物を使用する変わりに、例示化合物B−31の化合物を使用した以外は、実施例5に記載の操作に従い、有機電界発光素子を作製した。
実施例5において、例示化合物B−9の化合物を使用する変わりに、例示化合物A−61の化合物を使用した以外は、実施例5に記載の操作に従い、有機電界発光素子を作製した。
実施例5において、例示化合物B−9の化合物を使用する変わりに、例示化合物A−36の化合物を使用した以外は、実施例5に記載の操作に従い、有機電界発光素子を作製した。
実施例5において、例示化合物B−9の化合物を使用する変わりに、例示化合物A−2の化合物を使用した以外は、実施例5に記載の操作に従い、有機電界発光素子を作製した。
厚さ110nmのITO透明電極(陽極)を有するガラス基板を、中性洗剤、セミコクリーン(フルウチ化学製)、超純水、アセトン、イソプロパノールを用いて超音波洗浄した。この基板を窒素ガスにより乾燥し、さらにUV/オゾン洗浄した後、蒸着装置の基板ホルダーに固定し、蒸着槽を1×10−5Paに減圧した。
比較例1の有機電界発光素子と比較して本発明の化合物を正孔阻止層に使用することで、駆動電圧が低電圧化し、発光輝度が向上し、輝度の半減期も永くなることが分かる。
実施例10において、正孔阻止層(電子輸送層)の形成にあたり、例示化合物A−61の化合物を使用する変わりに、例示化合物B−31の化合物を使用した以外は、実施例10に記載の操作に従い、有機電界発光素子を作製した。
厚さ110nmのITO透明電極(陽極)を有するガラス基板を、中性洗剤、セミコクリーン(フルウチ化学製)、超純水、アセトン、イソプロパノールを用いて超音波洗浄した。この基板を窒素ガスにより乾燥し、さらにUV/オゾン洗浄した後、蒸着装置の基板ホルダーに固定し、蒸着槽を1×10−5Paに減圧した。
比較例1の有機電界発光素子と比較して本発明の化合物を正孔輸送層に使用することで、駆動電圧が低電圧化し、発光輝度が向上し、輝度の半減期も永くなることが分かる。
2 陽極
3 正孔注入輸送層
3’ 正孔注入層
3” 正孔輸送層
3a 正孔注入輸送成分
4 発光層
4a 発光成分
5 電子注入輸送層
5’ 正孔阻止層(電子輸送層)
5a 電子注入輸送成分
6 陰極
7 電源
Claims (11)
- 一対の電極間に、発光層を含む機能層を挟持してなる有機電界発光素子であって、
前記発光層は燐光発光材料を含有し、
前記機能層のいずれかの層は、一般式(1)で表されるフルオレン化合物の少なくとも1種を含有する、有機電界発光素子。
R1〜R6は、それぞれ独立に置換基を表し、R1〜R6はそれぞれ隣接する基と共に、環を形成していてもよく、
n1〜n6は0または1〜3の整数を表し、
AおよびBは、直鎖、分岐鎖または環状のアルキル基、置換または未置換のアリール基あるいは置換または未置換のアラルキル基を表すが、AとBは互いに同一の基ではなく
nは1または2を表す(ただし、AおよびBがいずれもアリール基である場合を除く)。〕 - 前記燐光発光材料は、遷移金属錯体である、請求項1に記載の有機電界発光素子。
- 前記遷移金属は、イリジウムまたは白金である、請求項2に記載の有機電界発光素子。
- 一般式(1)において、AおよびBの一方が、直鎖、分岐または環状のアルキル基であり、かつ他方が、置換または未置換のアラルキル基である、請求項1に記載の有機電界発光素子。
- 一般式(1)において、AおよびBの一方が、直鎖または分岐のアルキル基であり、他方が、環状のアルキル基である、請求項1に記載の有機電界発光素子。
- 一般式(1)で表されるフルオレン化合物を含有する層が発光層である、請求項1〜5のいずれか一項に記載の有機電界発光素子。
- 一般式(1)で表されるフルオレン化合物を含有する層が正孔注入輸送層である、請求項1〜5のいずれか一項に記載の有機電界発光素子。
- 一般式(1)で表されるフルオレン化合物を含有する層が電子注入輸送層である、請求項1〜5のいずれか一項に記載の有機電界発光素子。
- 前記一対の電極間に挟持される機能層は、正孔注入輸送層をさらに有する、請求項1〜8のいずれか一項に記載の有機電界発光素子。
- 前記一対の電極間に挟持される機能層は、電子注入輸送層をさらに有する、請求項1〜9のいずれか一項に記載の有機電界発光素子。
- 前記一対の電極間に、少なくとも一層の正孔輸送層、発光層、および電子輸送層が挟持される、請求項1〜10のいずれか一項に記載の有機電界発光素子。
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WO2014163211A1 (en) * | 2013-04-03 | 2014-10-09 | Canon Kabushiki Kaisha | Organic compound and organic light-emitting device |
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WO2012133209A1 (ja) * | 2011-03-30 | 2012-10-04 | 住友化学株式会社 | 有機エレクトロルミネッセンス素子 |
JP2013107845A (ja) * | 2011-11-18 | 2013-06-06 | Nippon Chemicon Corp | フルオレン誘導体及びその製造方法 |
WO2014163211A1 (en) * | 2013-04-03 | 2014-10-09 | Canon Kabushiki Kaisha | Organic compound and organic light-emitting device |
JP2014212315A (ja) * | 2013-04-03 | 2014-11-13 | キヤノン株式会社 | 有機化合物及び有機発光素子 |
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US11339134B2 (en) | 2015-08-28 | 2022-05-24 | Sumitomo Chemical Company, Limited | Composition and light emitting element device using the same |
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