WO2006070713A1 - 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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- WO2006070713A1 WO2006070713A1 PCT/JP2005/023714 JP2005023714W WO2006070713A1 WO 2006070713 A1 WO2006070713 A1 WO 2006070713A1 JP 2005023714 W JP2005023714 W JP 2005023714W WO 2006070713 A1 WO2006070713 A1 WO 2006070713A1
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- Prior art keywords
- organic
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- thin film
- wet method
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- 239000012298 atmosphere Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- OWAQXCQNWNJICI-UHFFFAOYSA-N benzene;chloroform Chemical compound ClC(Cl)Cl.C1=CC=CC=C1 OWAQXCQNWNJICI-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 125000000319 biphenyl-4-yl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1C1=C([H])C([H])=C([*])C([H])=C1[H] 0.000 description 1
- 125000002529 biphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C12)* 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 125000004106 butoxy group Chemical group [*]OC([H])([H])C([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- KOPBYBDAPCDYFK-UHFFFAOYSA-N caesium oxide Chemical compound [O-2].[Cs+].[Cs+] KOPBYBDAPCDYFK-UHFFFAOYSA-N 0.000 description 1
- 229910001942 caesium oxide Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 150000004770 chalcogenides Chemical class 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 description 1
- 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 1
- 125000002933 cyclohexyloxy group Chemical group C1(CCCCC1)O* 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 125000001887 cyclopentyloxy group Chemical group C1(CCCC1)O* 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229940117389 dichlorobenzene Drugs 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- 239000003759 ester based solvent Substances 0.000 description 1
- 150000002168 ethanoic acid esters Chemical class 0.000 description 1
- 239000004210 ether based solvent Substances 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 150000008376 fluorenones Chemical class 0.000 description 1
- 150000004673 fluoride salts Chemical class 0.000 description 1
- YKASHPSKFYVZRC-UHFFFAOYSA-M furan-2-ylmethyl(trimethyl)azanium;iodide Chemical compound [I-].C[N+](C)(C)CC1=CC=CO1 YKASHPSKFYVZRC-UHFFFAOYSA-M 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium oxide Inorganic materials O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-M hexanoate Chemical compound CCCCCC([O-])=O FUZZWVXGSFPDMH-UHFFFAOYSA-M 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003707 hexyloxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 229940083761 high-ceiling diuretics pyrazolone derivative Drugs 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 125000001041 indolyl group Chemical group 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- UEEXRMUCXBPYOV-UHFFFAOYSA-N iridium;2-phenylpyridine Chemical compound [Ir].C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1 UEEXRMUCXBPYOV-UHFFFAOYSA-N 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000005453 ketone based solvent Substances 0.000 description 1
- 239000005355 lead glass Substances 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 1
- 229910001947 lithium oxide Inorganic materials 0.000 description 1
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- UZKWTJUDCOPSNM-UHFFFAOYSA-N methoxybenzene Substances CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- MQKACBRNWSEHJQ-UHFFFAOYSA-N n,n-bis(hydroxymethyl)acetamide Chemical compound CC(=O)N(CO)CO MQKACBRNWSEHJQ-UHFFFAOYSA-N 0.000 description 1
- ZSLFSAHSXHFESK-UHFFFAOYSA-N n,n-diphenylpyren-1-amine Chemical compound C1=CC=CC=C1N(C=1C2=CC=C3C=CC=C4C=CC(C2=C43)=CC=1)C1=CC=CC=C1 ZSLFSAHSXHFESK-UHFFFAOYSA-N 0.000 description 1
- 125000003506 n-propoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004957 naphthylene group Chemical group 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- UPIUNSCEIALIPL-UHFFFAOYSA-N osmium 2-phenylpyridine Chemical compound [Os].C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1 UPIUNSCEIALIPL-UHFFFAOYSA-N 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- 125000001715 oxadiazolyl group Chemical group 0.000 description 1
- 150000007978 oxazole derivatives Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- PVADDRMAFCOOPC-UHFFFAOYSA-N oxogermanium Chemical compound [Ge]=O PVADDRMAFCOOPC-UHFFFAOYSA-N 0.000 description 1
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 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
- 125000004115 pentoxy group Chemical group [*]OC([H])([H])C([H])([H])C([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 1
- 150000004986 phenylenediamines Chemical class 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 229920000548 poly(silane) polymer Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 150000004032 porphyrins Chemical class 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- JEXVQSWXXUJEMA-UHFFFAOYSA-N pyrazol-3-one Chemical class O=C1C=CN=N1 JEXVQSWXXUJEMA-UHFFFAOYSA-N 0.000 description 1
- 150000003219 pyrazolines Chemical class 0.000 description 1
- 150000003220 pyrenes Chemical class 0.000 description 1
- 125000005548 pyrenylene group Chemical group 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229910001925 ruthenium oxide Inorganic materials 0.000 description 1
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 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
- 230000035945 sensitivity Effects 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
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 125000005504 styryl group Chemical group 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 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
- 125000001544 thienyl group Chemical group 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 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 1
- 239000013638 trimer Substances 0.000 description 1
- 125000006617 triphenylamine group Chemical group 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/125—Active-matrix OLED [AMOLED] displays including organic TFTs [OTFT]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/15—Deposition of organic active material using liquid deposition, e.g. spin coating characterised by the solvent used
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/16—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering
- H10K71/164—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering using vacuum deposition
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/40—Thermal treatment, e.g. annealing in the presence of a solvent vapour
- H10K71/421—Thermal treatment, e.g. annealing in the presence of a solvent vapour using coherent electromagnetic radiation, e.g. laser annealing
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/30—Coordination compounds
- H10K85/321—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3]
- H10K85/324—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3] comprising aluminium, e.g. Alq3
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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
- H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
- H10K85/626—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/656—Aromatic compounds comprising a hetero atom comprising two or more different heteroatoms per ring
- H10K85/6565—Oxadiazole compounds
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
Definitions
- the present invention relates to an organic electoluminescence element. More specifically, the present invention relates to an organic electroluminescent element that has improved the lifetime of the element by highly removing the residual solvent from the organic thin film layer.
- electroluminescence organic electroluminescence devices
- Organic EL devices have the advantages of not only a wide viewing angle and excellent contrast, but also a quick response time as a spontaneous emission type display device.
- Organic thin film layers such as a light-emitting layer forming an organic EL element are formed by a dry method such as a vacuum evaporation method or a wet method such as spin coating or ink jet.
- the dry method has the advantage that the material for forming the organic thin film layer does not need to be dissolved in a solvent, and the solvent does not need to be removed after film formation.
- the vacuum deposition method is a high-vacuum process that requires large-scale equipment, it has disadvantages such as high manufacturing cost, inability to apply to large screen substrates, and difficulty in mass production.
- Patent Document 1 Japanese Patent Laid-Open No. 2003-17252
- the present invention has been made in view of the above-described problems, and an object thereof is to provide an organic EL element including an organic thin film layer formed by a wet method and having an improved emission lifetime. .
- the present inventor has heated the organic thin film layer constituting the organic EL element by infrared heating under an ultrahigh vacuum, so that the residual solvent in the layer is not heated to a high temperature. As a result, it was found that the emission lifetime of the organic EL device can be improved, and the present invention has been completed.
- An organic electoluminescence device in which an organic thin film layer including a light emitting layer is sandwiched between a cathode and an anode, wherein at least one layer of the organic thin film layer is formed by a wet method, and a residual solvent in this layer is , Atsushi Nobori spectrometry: detection limit of measurement by (TDS measurement temperature 80 ° C) (detection partial pressure, 1. 0 X 10_ 12 Pa) or less is an organic elect port eLEMENT.
- the organic electoluminescence device according to 1, wherein the layer formed by the wet method is a layer dried by heating with infrared rays under an ultrahigh vacuum.
- the ultra-high vacuum in the vacuum level 10_ 9 Pa ⁇ : 10_ is 6 Pa, the heating temperature by infrared radiation, according to 2 or less glass transition temperature of the material for forming the layer formed by the wet method Organic electroluminescence device.
- the ultra-high vacuum in the vacuum level 10- 9 Pa ⁇ : 10- 7 is Pa, the heating temperature by infrared rays, a glass transition temperature below 10 ° C or more lower Les formation material of the layer formed by the wet method
- the organic electoluminescence device according to any one of 1 to 4, which is a low molecular weight compound having at least one force S of a layer forming material formed by the wet method.
- the organic EL device of the present invention a device having a long emission lifetime can be obtained even if the device includes an organic thin film layer formed by a wet method.
- the organic thin film layer formed by the wet method can be dried at a low temperature in a short time. Furthermore, the residual solvent in the organic thin film layer can be highly removed. Therefore, it is effective for increasing the area of display panels using organic EL elements.
- FIG. 1 is an example of a spectrum showing the relationship between the measurement time obtained by thermal desorption analysis and the amount of gas generated.
- FIG. 2 is a schematic view of an organic layer forming apparatus.
- FIG. 3 is a cross-sectional view showing one embodiment of the organic EL device of the present invention.
- an organic thin film layer including a light emitting layer is sandwiched between a cathode and an anode, and at least one of the organic thin film layers is formed by a wet method.
- the residual solvent in this layer must be below the detection limit (detection partial pressure is 1.0 X 10 _ 12 Pa) measured by thermal desorption analysis (TDS: measurement temperature 80 ° C). It is characterized by.
- Thermal desorption analysis is a method in which a sample is heated and heated in a high-vacuum vessel, and the residual solvent is desorbed from the sample and gasified while the temperature is rising, and detected by a quadrupole mass spectrometer. Yes, it is a measurement method that can detect the residual solvent contained in the sample with high sensitivity.
- the measurement conditions for temperature programmed desorption analysis in the present invention are as follows: the vacuum level is 1.0 to 9.9 X 10 " 7 Pa, the sample temperature is about 80 ° C (fixed), and the sample is 5 mm X 5 mm square. If the maximum detected partial pressure of the gas generated by the residual solvent detected during measurement under this condition is 1.0 X 10 " 12 Pa or less, the device will be deteriorated by the residual solvent during wet film formation. It can be effectively prevented. Incidentally, preferably, the highest detection partial pressure 1. is under 0 X 10- 12 Pa or less when the temperature of the sample was approximately 100 ° C.
- FIG. 1 is an example of a spectrum showing the relationship between the measurement time obtained by temperature programmed desorption analysis and the amount of gas generated.
- the vertical axis represents the amount of gas generated (detected partial pressure: unit Pa) and the measurement temperature
- the horizontal axis represents the measurement time.
- a peak indicating that a large amount of toluene was desorbed was observed during the measurement time of 10 minutes to 30 minutes. It can be confirmed that the generation of toluene gas was completed in about 40 minutes.
- “Below detection limit” means that the above peaks in Fig. 1 are not observed, that is, about 40 minutes have passed (gas desorption cannot be observed (detection partial pressure: 1.0 X 10_ 12 Pa or less) )).
- Examples of a method for setting the residual solvent of a layer formed by a wet method to be equal to or lower than the detection limit of measurement by a temperature programmed desorption analysis method include, for example, a layer formed by a wet method, which is the production method of the present invention.
- a method of drying by heating with infrared rays under an ultra-high vacuum is mentioned. This will be described below with reference to the drawings.
- FIG. 2 is a schematic view of an organic layer forming apparatus.
- the organic layer forming apparatus 10 includes a vacuum chamber 20, an infrared ray generator 30, and a vacuum pump (not shown) as main components.
- the vacuum chamber 20 is a sealed container that keeps the inside of the chamber in an ultra-high vacuum, and a quartz glass window 22 for introducing infrared rays irradiated from the infrared ray generator 30 into the chamber is provided at the upper part thereof. .
- a sample stage 24 Inside the chamber 20, there is a sample stage 24, on which a sample 26 of an organic EL element in which a layer formed by a wet method is applied is installed.
- a vacuum pump is connected to the vacuum chamber 20 to bring the inside of the vacuum chamber 20 into an ultra-high vacuum state.
- these components can use the member normally used industrially.
- a magnetic levitation turbo pump manufactured by Leibold, TYP TURBO VAC 340M
- a halogen lamp can be used for the infrared ray generator.
- a sample 26 having a layer applied by a wet method is placed on a sample table 24.
- the inside of the vacuum chamber 20 is evacuated by operating a vacuum pump, and an ultra-high vacuum state is set (arrow A indicates the evacuation direction).
- red light is emitted from the infrared generator 30 as shown by arrow B.
- a sample 26 in the vacuum chamber 20 is irradiated with an external line.
- the heating temperature of sample 26 is adjusted by controlling the amount of infrared irradiation. Infrared rays may be irradiated before the chamber is in a vacuum state.
- the layer formed by the wet method with infrared rays, not only the surface of the layer but also the inside of the layer can be quickly heated. For this reason, even if the heating temperature is set to a relatively low temperature, the drying time of the layer can be shortened. Then, by performing infrared heating under an ultra-high vacuum, the residual solvent in the layer can be made below the detection limit of measurement by temperature programmed desorption analysis.
- the vacuum level of the ultrahigh vacuum Shi preferred that it is particularly good Mashigu a 10_ 9 Pa ⁇ 10_ 6 Pa, a 10_ 9 Pa ⁇ 10_ 7 Pa les. Vacuum level adversely les than 10_ 6 Pa, and or summer drying time is long, there is a possibility that the solvent can not be sufficiently removed, also better than 10- 9Pa, it becomes difficult to maintain the vacuum state.
- the heating temperature by infrared rays is equal to or lower than the glass transition temperature of the forming material of the layer formed by the wet method.
- the heating temperature is 10 ° C or more lower than the glass transition temperature of the forming material. It is preferable.
- the glass transition temperature of the forming material varies depending on the compound, and is generally about 60 ° C to 200 ° C.
- the drying time of the organic thin film layer may be appropriately adjusted in consideration of the layer thickness and the glass transition temperature of the material used. For example, in the case of the organic thin film layer to be measured in FIG. 21, the drying time is about 40 minutes at a drying temperature of 80 ° C.
- the layers formed by the wet method may be dried one by one, or after a plurality of layers, for example, a hole injection layer and a light emitting layer are formed in succession, You can dry them all at once. In this case, the previously formed layer may be preliminarily dried.
- the organic EL device of the present invention adopts a known configuration for other configurations as long as the residual solvent of the layer formed by the wet method is removed at a high level as described above. Is possible.
- embodiments of the organic EL element of the present invention will be described.
- FIG. 3 is a cross-sectional view showing an embodiment of the organic EL element of the present invention.
- This organic EL device has a hole injection layer 62, a light emitting layer 64, an electron injection layer between the cathode 70 and the anode 50.
- An organic thin film layer 60 composed of an inner layer 66 is sandwiched.
- one or a plurality of layers sandwiched between the anode and the cathode correspond to the organic thin film layer, but all of these layers may not be composed of an organic compound. Or a layer containing an inorganic compound.
- an organic EL element is fabricated on a light-transmitting substrate.
- the light-transmitting substrate is a substrate that supports the organic EL element, and is preferably a smooth substrate having a light transmittance in the visible region of 400 to 700 nm of 50% or more.
- the anode of the organic EL device of the present invention plays a role of injecting holes into the hole transport layer or the light emitting layer, and it is effective to have a work function of 4.5 eV or more.
- Specific examples of the anode material used in the present invention include tin-doped indium oxide alloy (ITO), tin oxide (NESA), gold, silver, platinum, copper, and the like.
- the anode can be manufactured by forming a thin film of these electrode materials by a method such as vapor deposition or sputtering.
- the transmittance of the anode for light emission is greater than 10%.
- the sheet resistance of the anode is preferably several hundred ⁇ / mouth or less.
- the film thickness of the anode is a force depending on the material, and is usually selected in the range of 10 nm to l z m, preferably 10 to 200 nm.
- the light emitting layer of the organic EL device has the following functions.
- injection function a function capable of injecting holes from the anode or hole injection layer when an electric field is applied and a function of injecting electrons from the negative electrode or electron injection layer;
- Transport function function to move injected charges (electrons and holes) by the force of electric field
- light emission function function to provide a field for recombination of electrons and holes and connect this to light emission
- a method for forming the light emitting layer for example, a known method such as a vapor deposition method, a spin coating method, or an LB method can be applied. Further, as disclosed in Japanese Patent Application Laid-Open No. 57-51781, after a binder such as a resin and a composite material are dissolved in a solvent to form a solution, this is subjected to spin coating or the like.
- the light emitting layer can also be formed by reducing the thickness.
- the light emitting layer is preferably composed of a host compound and a dopant.
- the phosphine H compound transports at least one charge of electrons or holes.
- the host compound include a known force rubazole derivative, a compound having an anthracene skeleton, a compound having a condensed heterocyclic skeleton having a nitrogen atom, and the like.
- the host compound may be a polymer compound. Examples of the polymer compound as a host include monomers containing rubazole, oligomers such as dimers and trimers, and carbazols. And a polymer compound having a ruthenium group.
- the light emitting layer may contain a fluorescent or phosphorescent dopant.
- a styrylamine compound represented by the following formula (1) or an arylamine compound represented by the formula (2) can be preferably used.
- Ar 1 is a group selected from phenyl, biphenyl, terphenyl, stilbene, distylinolealino and Ar 2 and Ar 3 are each a hydrogen atom or an aromatic group having 6 to 20 carbon atoms. And 8 to 8! ” 3 may be substituted.
- P is an integer of:! To 4 and more preferably Ar 2 and / or Ar 3 is substituted with a styryl group.
- the aromatic group having 6 to 20 carbon atoms is preferably a phenyl group, a naphthyl group, an anthranyl group, a phenanthryl group, a terphenyl group, or the like.
- Ar 4 to Ar ′′ are aryl groups having 5 to 40 nuclear atoms which may be substituted.
- Q is an integer of:! To 4)
- aryl groups having 5 to 40 nucleus atoms include phenyl, naphthyl, anthranyl, phenanthryl, pyrenyl, coronyl, biphenyl, terphenyl, pyrrolyl, furanol, thiophenyl, benzothiof Preferred are enil, oxadiazolyl, diphenylanthranyl, indolyl, carbazolyl, pyridinole, benzoquinolyl, fluoranthur, isenaft fluoranthur, stilbene.
- the aryl group having 5 to 40 nucleus atoms may be substituted with a substituent.
- Preferred substituents are alkyl groups having 6 to 6 carbon atoms (ethyl group, methyl group, i_propyl group). Group, n_propyl group, s_butyl group, t-butyl Group, pentyl group, hexyl group, cyclopentyl group, cyclohexyl group, etc.), alkoxy group having 1 to 6 carbon atoms (ethoxy group, methoxy group, i-propoxy group, n-propoxy group, s-butoxy group, t Butoxy group, pentoxy group, hexyloxy group, cyclopentoxy group, cyclohexyloxy group, etc.), aryl group having 5 to 40 nuclear atoms, amino group substituted with aryl group having 5 to 40 nuclear atoms And an ester group having an aryl group having 5 to 40 nuclear atoms, an ester group having an alkyl group having 1 to 6 carbon atoms, a cyan group,
- the phosphorescent dopant is at least one selected from iridium (Ir), ruthenium (Ru), palladium (Pd), platinum (Pt), osmium (Os) and rhenium (Re).
- the ligand that is preferably a metal complex containing one metal preferably has at least one skeleton selected from the group consisting of a phenylpyridine skeleton, a bibilidyl skeleton, and a phenantorin phosphorus skeleton.
- metal complexes include, for example, tris (2-phenylpyridine) iridium, tris (2-phenylpyridine) ruthenium, tris (2-phenylpyridine) palladium, bis (2-phenylpyridine) platinum. , Tris (2-phenyl pyridine) Osmium, tris (2-phenyl pyridine) rhenium, ota-ethyl platinum porphyrin, ota-phenyl platinum porphyrin, ota-ethyl palladium porphyrin, octaphenyl para dip porphyrin, etc.
- a suitable complex is selected from the relationship with the required emission color, device performance, and host compound.
- the hole injection / transport layer is a layer that assists hole injection into the light emitting layer and transports it to the light emitting region, and transmits ion energy with high hole mobility. Usually 5. Smaller than 5eV.
- a material that transports holes to the light emitting layer with a lower electric field strength is preferred.
- the hole mobility is, for example, 10 4 to: 10 6 V / cm. sometimes, preferably it is at least 10- 4 cm 2 / V 's.
- the material for forming the hole injecting and transporting layer is not particularly limited as long as it has the above-mentioned preferred properties, and has been conventionally used as a charge transporting material for holes in photoconductive materials.
- any known medium force used for the hole injection layer of the organic EL element can be selected and used.
- aromatic tertiary amines, hydrazone derivatives, force rubazole derivatives, triazole derivatives, imidazole derivatives, Examples include dicarbazole, polyethylene dioxythiophene 'polysulfonic acid (PEDOT' PS S), and the like. Specific examples include triazole derivatives (see US Pat. No. 3,112,197), oxadiazole derivatives (see US Pat. No.
- the materials described above can be used as the material for the hole injection layer.
- S porphyrin compound, aromatic tertiary amine compound and styrylamine compound (US Pat. No. 4,127,412 Meito Ida , JP-A-53-27033, 54-58445, 54-149634, 54-64299, 55-79450, 55-144250, 5 6- 119132, 61-295558, 61-98353, 63-295, 695, etc.), in particular, an aromatic tertiary amine compound is preferably used.
- inorganic compounds such as p-type Si and p-type SiC can also be used as the material for the hole injection layer.
- the hole injection and transport layer can be formed by thinning the above-described compound by a known method such as a vacuum deposition method, a spin coating method, a casting method, or an LB method.
- the thickness of the hole injection or transport layer is not particularly limited, but is usually 5 nm to 5 zm. It may be composed of one or two or more layers of the above materials, or may be a laminate of hole injection and transport layers composed of a compound different from the hole injection and transport layer. Good.
- the organic semiconductor layer is a layer for helping the injection of holes or electrons into the emitting layer, and is preferably a layer having 10 _ 1 ° S / cm or more conductivity .
- the material of the organic semiconductor layer include thiophene oligomers, conductive oligomers such as allylamin oligomers disclosed in JP-A-8-193191, and conductive properties such as arylamine dendrimers. Dendrimers and the like can be used.
- the electron injection layer is a layer that assists the injection of electrons into the light emitting layer.
- the electron mobility is high and the adhesion improving layer is included in the electron injection layer.
- it is a layer made of a material that adheres well to the cathode.
- 8-hydroxyquinoline and its metal complex, oxadiazole derivative are preferable.
- metal complex of 8-hydroxyquinoline or a derivative thereof include metal chelate oxinoid compounds containing a chelate of oxine (generally 8_quinolinol or 8-hydroxyquinoline).
- metal chelate oxinoid compounds containing a chelate of oxine generally 8_quinolinol or 8-hydroxyquinoline.
- tris (8-quinolinol) aluminum (Alq) can be used for the electron injection layer.
- examples of the oxadiazole derivative include an electron transfer compound represented by the following formula.
- Ar 1 ′, Ar 2 ′, Ar 3 ′, Ar 5 ′, Ar 6 ′, Ar 9 ′ each represent a substituted or unsubstituted aryl group, and each may be the same or different.
- Ar 4 ′, Ar 7 ′, Ar 8 ′ are substituted or unsubstituted arylene groups, which may be the same or different.
- the aryl group includes a phenyl group, a biphenyl group, an anthranyl group, a perylenyl group, a pyrenyl group, and the like.
- the arylene group includes a phenylene group and a naphthylene group. , Biphenylene group, anthranylene group, peryleneylene group, pyrenylene group and the like.
- examples of the substituent include an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, and a cyan group.
- This electron transfer compound is preferably a thin film-forming compound.
- electron transfer compound include the following.
- Me represents a methyl group
- Bu represents a butyl group
- a preferred form of the organic EL device of the present invention is a device containing a reducing dopant in an electron transporting region or an interface region between a cathode and an organic thin film layer.
- the reducing dopant is defined as a substance capable of reducing an electron transporting compound. Accordingly, various materials can be used as long as they have a certain reducibility, such as alkali metals, alkaline earth metals, rare earth metals, alkali metal oxides, alkali metal halides, alkaline earths.
- Na (work function: 2. 36 eV)
- K (work function: 2. 28 eV)
- Rb (work function: 2. 16 eV)
- Cs (work function: 1. 95 eV) force at least one alkali metal selected from the group consisting of Ca (work function: 2 9eV), Sr (work function: 2.0 to 2.5 eV) and Ba (work function: 2.52 eV).
- a more preferred reducing dopant is at least one alkali metal selected from the group consisting of K, Rb and Cs, more preferably Rb or Cs, and most preferably Cs.
- alkali metals can improve emission brightness and extend the life of organic EL devices by adding a relatively small amount to the electron injection region, which has a particularly high reducing ability.
- a reducing dopant having a work function of 2.9 eV or less a combination of these two or more alkali metals is also preferred.
- combinations containing Cs for example, Cs and Na, Cs and K, Cs and A combination of Rb or Cs, Na and ⁇ is preferred.
- the organic EL device of the present invention it is possible to effectively prevent leakage of current, which can be provided by further providing an electron injection layer composed of an insulator or a semiconductor between the cathode and the organic thin film layer. It is possible to improve the fit.
- an insulator it is preferable to use at least one metal compound selected from the group consisting of alkali metal chalcogenides, alkaline earth metal chalcogenides, alkali metal halides and alkaline earth metal halides. . Electron injection layer force S It is preferable that the material is composed of these alkali metal chalcogenides and the like because the electron injection property can be further improved.
- preferable alkali metal chalcogenides include, for example, LiO, LiO, Na S, Na Se and NaO.
- potash earth metal chalcogenide examples include CaO, BaO, SrO, BeO, BaS, and CaSe.
- preferable alkali metal halides include, for example, LiF, NaF, KF, LiCl, KC1, and NaCl.
- Preferred alkaline earth metal halides include fluorides such as CaF, BaF, SrF, MgF, and BeF.
- halides other than fluoride are other than fluoride.
- the semiconductor Ba, Ca, Sr, Yb, Al, Ga, In, Li, Na, Cd, Mg, Si, Ta,
- the inorganic compound constituting the electron transport layer is preferably a microcrystalline or amorphous insulating thin film. If the electron transport layer is composed of these insulating thin films, a more uniform thin film is formed, and pixel defects such as dark spots can be reduced. Examples of such inorganic compounds include the aforementioned alkali metal chalcogenides, alkaline earth metal chalcogenides, alkali metal halides, and alkaline earth metal halides.
- a metal, an alloy, an electrically conductive compound and a mixture thereof having a small work function (4 eV or less) are used as the cathode of the organic EL device of the present invention.
- a metal, an alloy, an electrically conductive compound and a mixture thereof having a small work function (4 eV or less) are used as the cathode of the organic EL device of the present invention.
- an electrode material include sodium, sodium monopotassium alloy, magnesium, lithium, magnesium'silver alloy, aluminum / aluminum oxide, aluminum'lithium alloy, indium, rare earth metal, and the like.
- the cathode can be produced by forming a thin film of these electrode materials by a method such as vapor deposition or sputtering.
- the transmittance of the cathode for light emission is preferably greater than 10%.
- the sheet resistance as a cathode is preferably several hundred ⁇ / mouth or less.
- the film thickness is usually 10 ⁇ to 1 ⁇ , preferably 50 to 2 OOnm.
- the organic EL device of the present invention applies an electric field to an ultra-thin film, pixel defects due to leakage or short-circuiting are likely to occur. In order to prevent this, it is preferable to insert an insulating thin film layer between a pair of electrodes.
- Examples of the material used for the insulating layer include aluminum oxide, lithium fluoride, lithium oxide, cesium fluoride, cesium oxide, magnesium oxide, magnesium fluoride, oxidizing power, subsequentlyium, calcium fluoride, aluminum nitride, titanium oxide, Examples thereof include silicon oxide, germanium oxide, silicon nitride, boron nitride, molybdenum oxide, ruthenium oxide, and vanadium oxide. Moreover, you may use these mixtures and laminates.
- each organic thin film layer forming the organic thin film layer of the organic EL device of the present invention is particularly limited. In general, however, if the film thickness is too thin, defects such as pinholes occur, and conversely, if it is too thick, a high applied voltage is required and the efficiency deteriorates. Therefore, the range of several nm to 1 / m is usually preferable.
- An organic EL element can be produced by forming an anode, an organic thin film layer such as a light emitting layer, and a cathode by the materials and methods exemplified above.
- the organic EL device can be fabricated from the cathode to the anode in the reverse order.
- the organic EL device of the present invention at least one of the organic thin film layers described above is formed by a wet method.
- solvents used in preparing solutions include methanol, ethanol, propanol, isopropanol, n-butanol, t-butanol, pentanole, hexanol, cyclohexanol, methyl caffeosolve, ethyl caffeosolve, and ethylene glycol.
- Alcohol solvents such as dichloromethane, dichloromethane, chloroform, carbon tetrachloride, tetrachloroethane, trichloroethane, chloroform benzene, dichlorobenzene, chlorotolenene, and other halogenated hydrocarbon solvents, dibutyl ether tetrahydrofuran, dioxane Ether solvents such as anisole, aromatic solvents such as benzene, toluene, xylene and ethylbenzene, paraffinic solvents such as hexane, octane, decane and tetralin, ethyl acetate, butyl acetate, acetic acid Ester solvents such as mill, amide solvents such as N, N-dimethylformamide, N, N-dimethylolacetamide, N-methylpyrrolidinone, ketone solvents such as acetone, methyl ethy
- the solution of the forming material preferably dissolves 0.1% by weight or more of the forming material.
- the thickness of the light-emitting layer of the organic EL element is usually 10 to: OOnm. In general, it is often 50 nm.
- the thickness of the light-emitting layer of the organic EL element is usually 10 to: OOnm. In general, it is often 50 nm.
- the preferable concentration of the coating solution is 0.1% by weight or more, and it is desirable that the concentration of the solution is 0.5% by weight or more in order to form a film thickness of 50 nm, which is a more general thickness.
- An organic thin film layer can be formed by applying a solution of the forming material to the forming site by spin coating, ink jetting, or the like and drying.
- low molecular weight compounds are those having a molecular weight of 10,000 or less, preferably 3000 or less.
- anthracene compounds or pyrene compounds described in PCT / JP03 / 10402, PCT / JP2004 / 018111, Japanese Patent Application No. 2004-157571 can be used. These compounds can be suitably used, for example, as a host material for the light emitting layer.
- a glass substrate with a 25 mm ⁇ 75 mm ⁇ l. 1 mm thick IT ⁇ transparent electrode was ultrasonically cleaned in isopropyl alcohol for 5 minutes, followed by UV ozone cleaning for 30 minutes.
- the measurement sample was cut to 5 mm ⁇ 5 mm and measured.
- N, N, ⁇ ', N'-tetrakis (4-biphenyl) having a thickness of 20 nm was formed on this film.
- BPTPD film 4, 4'_benzidine film (BPTPD film) was formed by vapor deposition.
- This BPTPD film functions as a hole transport layer.
- PAVB doping material
- Alq film having a thickness of 10 nm was formed on this film. This Alq film functions as an electron transport layer.
- reducing dopant Li Li source: manufactured by Saergetta Co., Ltd.
- Alq Alq: L (10 nm) as an electron injection layer (cathode).
- A1 was deposited on the Alq: Li film to form a metal cathode, and an organic EL device was fabricated.
- An organic EL device was prepared in the same manner as in Example 1 except that the PEDOT'PSS thin film was formed as follows.
- PEDOT. PSS Polyethylene dioxythiophene ⁇ Polystyrene sulfonate
- the cause of this dark spot is thought to be due to the residual moisture in the PEDOT'PSS film because the drying power of the PEDOT 'PSS film was not sufficient by heating with a hot plate.
- a glass substrate with a 25 mm ⁇ 75 mm ⁇ l. 1 mm thick IT ⁇ transparent electrode was ultrasonically cleaned in isopropyl alcohol for 5 minutes, followed by UV ozone cleaning for 30 minutes.
- the glass substrate with the transparent electrode line after cleaning is mounted on the substrate holder of the vacuum evaporation apparatus, and first, the transparent electrode is covered on the surface on which the transparent electrode line is formed.
- 'Bis (4 diphenylaminophenyl) 1 N, N, 1 diphenyl 1 4, 4'-diaminobiphenyl film (TPD232 film) was deposited by vacuum evaporation. This TPD232 film functions as a hole injection layer.
- N, N, ⁇ ', ⁇ , and one tetrakis (4 bif ⁇ il) —4, 4' _ benzidine film (BPTPD film) with a film thickness of 40nm are deposited by vacuum evaporation. did.
- This BP TPD film functions as a hole transport layer.
- the substrate in vacuum at 10_ 6 Pa stand, by an infrared heating source (halogen lamp), and heated so that the substrate temperature is 120 ° C, and dried for 30 minutes.
- an infrared heating source halogen lamp
- the substrate was transferred into the vacuum deposition device using the substrate transfer device, and tris (8-hydroxyquinoline) aluminum (Alq) having a thickness of 30 nm was vacuum evaporated.
- Alq (8-hydroxyquinoline) aluminum
- a film was formed by a deposition method. This Alq film functions as an electron transport layer.
- lithium fluoride having a thickness of 1 nm was formed by a vacuum evaporation method to form an electron injection layer.
- an aluminum cathode was formed by vacuum deposition to produce an organic EL device.
- An organic EL device was produced in the same manner as in Example 2, except that the light emitting layer was formed as follows.
- Example 2 Using the same coating solution as in Example 2, a 40 nm thick light emitting layer was formed on the previously formed BPTPD film by spin coating. This substrate was heated at 120 ° C. for 30 minutes on a hot plate and dried to form a light emitting layer.
- Comparative Example 3 An organic EL device was produced in the same manner as in Example 2, except that the light emitting layer was dried at 140 ° C. for 30 minutes on a hot plate.
- a glass substrate having a thickness of 5 mm X 5 mm X lmm was subjected to ultrasonic cleaning in isopropyl alcohol for 5 minutes and then UV ozone cleaning for 30 minutes.
- This substrate was mounted on a spinner (manufactured by Active Co., Ltd.), and a thin film having a film thickness of 40 nm was coated using an lwt% toluene solution of the above compound A.
- the organic EL device of the present invention can improve the light emission lifetime even when it includes an organic thin film layer formed by a wet method.
- the organic EL device manufacturing method of the present invention can remove the residual solvent of the organic thin film layer formed by the wet method to a high degree, and further, the drying process can be performed at a low temperature and in a short time, so that the organic thin film layer is formed. It is possible to prevent deterioration of the material to be used.
- the present invention is an effective technique for achieving a large screen of a display device using an organic EL element.
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Abstract
Description
Claims
Priority Applications (3)
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US11/813,040 US20080100206A1 (en) | 2004-12-28 | 2005-12-26 | Organic Electroluminescent Device |
JP2006550740A JPWO2006070713A1 (ja) | 2004-12-28 | 2005-12-26 | 有機エレクトロルミネッセンス素子 |
EP05842270A EP1840990A1 (en) | 2004-12-28 | 2005-12-26 | Organic electroluminescent device |
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EP (1) | EP1840990A1 (ja) |
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JP2009152033A (ja) * | 2007-12-20 | 2009-07-09 | Konica Minolta Holdings Inc | 有機エレクトロルミネッセンス素子の製造方法、有機エレクトロルミネッセンス素子、表示装置及び照明装置 |
WO2009139172A1 (ja) * | 2008-05-15 | 2009-11-19 | 株式会社デンソー | 有機発光素子とその製造方法 |
JP2010055864A (ja) * | 2008-08-27 | 2010-03-11 | Sumitomo Chemical Co Ltd | 有機エレクトロルミネッセンス素子およびその製造方法 |
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WO2011074550A1 (ja) * | 2009-12-15 | 2011-06-23 | 三菱化学株式会社 | 有機電界発光素子の製造方法、有機電界発光素子、表示装置及び照明装置 |
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US9136491B2 (en) | 2008-08-27 | 2015-09-15 | Sumitomo Chemical Company, Limited | Organic electroluminescent element and method for producing the same |
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KR20150016507A (ko) | 2012-05-28 | 2015-02-12 | 미쓰비시 가가꾸 가부시키가이샤 | 도전성 박막 적층체의 제조 방법 |
JP2017216251A (ja) * | 2012-05-28 | 2017-12-07 | 三菱ケミカル株式会社 | 導電性薄膜積層体の製造方法 |
WO2016208596A1 (ja) * | 2015-06-22 | 2016-12-29 | 住友化学株式会社 | 有機電子素子の製造方法及び正孔注入層の形成方法 |
WO2016208597A1 (ja) * | 2015-06-22 | 2016-12-29 | 住友化学株式会社 | 有機電子素子の製造方法及び有機薄膜の形成方法 |
JPWO2016208597A1 (ja) * | 2015-06-22 | 2018-04-05 | 住友化学株式会社 | 有機電子素子の製造方法及び有機薄膜の形成方法 |
JPWO2016208596A1 (ja) * | 2015-06-22 | 2018-04-05 | 住友化学株式会社 | 有機電子素子の製造方法及び正孔注入層の形成方法 |
US10333067B2 (en) | 2015-06-22 | 2019-06-25 | Sumitomo Chemical Company, Limited | Method for manufacturing organic electronic element, and method for forming electron hole injection layer |
JP2019204810A (ja) * | 2018-05-21 | 2019-11-28 | パイオニア株式会社 | 発光装置及び発光装置の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1840990A1 (en) | 2007-10-03 |
TW200631462A (en) | 2006-09-01 |
JPWO2006070713A1 (ja) | 2008-06-12 |
US20080100206A1 (en) | 2008-05-01 |
KR20070093076A (ko) | 2007-09-17 |
CN101088181A (zh) | 2007-12-12 |
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