WO2006121015A1 - 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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- WO2006121015A1 WO2006121015A1 PCT/JP2006/309266 JP2006309266W WO2006121015A1 WO 2006121015 A1 WO2006121015 A1 WO 2006121015A1 JP 2006309266 W JP2006309266 W JP 2006309266W WO 2006121015 A1 WO2006121015 A1 WO 2006121015A1
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- WIPO (PCT)
- Prior art keywords
- refractive index
- light emitting
- organic
- layer
- intermediate conductive
- Prior art date
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- 238000005401 electroluminescence Methods 0.000 title abstract description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 45
- 239000004020 conductor Substances 0.000 claims description 17
- 238000010521 absorption reaction Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 10
- 229910001507 metal halide Inorganic materials 0.000 claims description 8
- 150000005309 metal halides Chemical class 0.000 claims description 8
- 230000001747 exhibiting effect Effects 0.000 claims description 4
- 229910052738 indium Inorganic materials 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 3
- 229910052779 Neodymium Inorganic materials 0.000 claims description 3
- 229910052772 Samarium Inorganic materials 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 209
- 238000002347 injection Methods 0.000 description 35
- 239000007924 injection Substances 0.000 description 35
- 239000000758 substrate Substances 0.000 description 20
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 17
- 150000001875 compounds Chemical class 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- -1 for example Substances 0.000 description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 238000000151 deposition Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
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- 230000008901 benefit Effects 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000010030 laminating Methods 0.000 description 4
- 238000004544 sputter deposition Methods 0.000 description 4
- 239000011135 tin Substances 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- UHXOHPVVEHBKKT-UHFFFAOYSA-N 1-(2,2-diphenylethenyl)-4-[4-(2,2-diphenylethenyl)phenyl]benzene Chemical compound C=1C=C(C=2C=CC(C=C(C=3C=CC=CC=3)C=3C=CC=CC=3)=CC=2)C=CC=1C=C(C=1C=CC=CC=1)C1=CC=CC=C1 UHXOHPVVEHBKKT-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000008033 biological extinction Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910000420 cerium oxide Inorganic materials 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 239000002019 doping agent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical class C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 3
- 238000007740 vapor deposition Methods 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 239000005725 8-Hydroxyquinoline Substances 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 241000288961 Saguinus imperator Species 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000007983 Tris buffer Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000004696 coordination complex Chemical class 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- RCRODHONKLSMIF-UHFFFAOYSA-N isosuberenol Chemical class O1C(=O)C=CC2=C1C=C(OC)C(CC(O)C(C)=C)=C2 RCRODHONKLSMIF-UHFFFAOYSA-N 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- RLSSMJSEOOYNOY-UHFFFAOYSA-N m-cresol Chemical compound CC1=CC=CC(O)=C1 RLSSMJSEOOYNOY-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910001512 metal fluoride Inorganic materials 0.000 description 2
- 150000004866 oxadiazoles Chemical class 0.000 description 2
- 229960003540 oxyquinoline Drugs 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- BCMCBBGGLRIHSE-UHFFFAOYSA-N 1,3-benzoxazole Chemical class C1=CC=C2OC=NC2=C1 BCMCBBGGLRIHSE-UHFFFAOYSA-N 0.000 description 1
- DUINDFIWPORCOV-UHFFFAOYSA-N 1,6,6-triphenylcyclohexa-1,3-diene Chemical group C1(=CC=CC=C1)C1(C(=CC=CC1)C1=CC=CC=C1)C1=CC=CC=C1 DUINDFIWPORCOV-UHFFFAOYSA-N 0.000 description 1
- GMSNNWHMDVLYMJ-UHFFFAOYSA-N 5,5-bis(2,2-diphenylethenyl)-2-phenylcyclohexa-1,3-diene Chemical group C1C=C(C=2C=CC=CC=2)C=CC1(C=C(C=1C=CC=CC=1)C=1C=CC=CC=1)C=C(C=1C=CC=CC=1)C1=CC=CC=C1 GMSNNWHMDVLYMJ-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical class C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 1
- ILKSWKRGRCRENH-UHFFFAOYSA-N C1(=CC=CC=C1)C1=CC=CC=C1.C(C)(C)(C)C1(C(C=CC=C1)O)C(C)(C)C Chemical group C1(=CC=CC=C1)C1=CC=CC=C1.C(C)(C)(C)C1(C(C=CC=C1)O)C(C)(C)C ILKSWKRGRCRENH-UHFFFAOYSA-N 0.000 description 1
- 102100025027 E3 ubiquitin-protein ligase TRIM69 Human genes 0.000 description 1
- 101000830203 Homo sapiens E3 ubiquitin-protein ligase TRIM69 Proteins 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910015711 MoOx Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910003087 TiOx Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 125000003785 benzimidazolyl group Chemical class N1=C(NC2=C1C=CC=C2)* 0.000 description 1
- XJHABGPPCLHLLV-UHFFFAOYSA-N benzo[de]isoquinoline-1,3-dione Chemical class C1=CC(C(=O)NC2=O)=C3C2=CC=CC3=C1 XJHABGPPCLHLLV-UHFFFAOYSA-N 0.000 description 1
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical class C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010549 co-Evaporation Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- HVMJUDPAXRRVQO-UHFFFAOYSA-N copper indium Chemical compound [Cu].[In] HVMJUDPAXRRVQO-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000007850 fluorescent dye Substances 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
- 230000001771 impaired effect Effects 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- CVKIMZDUDFGOLC-UHFFFAOYSA-N n,n-diphenyl-2-(2-phenylethenyl)aniline Chemical compound C=1C=CC=CC=1C=CC1=CC=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 CVKIMZDUDFGOLC-UHFFFAOYSA-N 0.000 description 1
- 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 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000035699 permeability Effects 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
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920006389 polyphenyl polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- RQGPLDBZHMVWCH-UHFFFAOYSA-N pyrrolo[3,2-b]pyrrole Chemical class C1=NC2=CC=NC2=C1 RQGPLDBZHMVWCH-UHFFFAOYSA-N 0.000 description 1
- 229910052705 radium Inorganic materials 0.000 description 1
- HCWPIIXVSYCSAN-UHFFFAOYSA-N radium atom Chemical compound [Ra] HCWPIIXVSYCSAN-UHFFFAOYSA-N 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
- 230000004044 response Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- UWRZIZXBOLBCON-UHFFFAOYSA-N styrylamine group Chemical class C(=CC1=CC=CC=C1)N UWRZIZXBOLBCON-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- NZFNXWQNBYZDAQ-UHFFFAOYSA-N thioridazine hydrochloride Chemical class Cl.C12=CC(SC)=CC=C2SC2=CC=CC=C2N1CCC1CCCCN1C NZFNXWQNBYZDAQ-UHFFFAOYSA-N 0.000 description 1
- HLLICFJUWSZHRJ-UHFFFAOYSA-N tioxidazole Chemical compound CCCOC1=CC=C2N=C(NC(=O)OC)SC2=C1 HLLICFJUWSZHRJ-UHFFFAOYSA-N 0.000 description 1
- ODHXBMXNKOYIBV-UHFFFAOYSA-N triphenylamine Chemical compound C1=CC=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 ODHXBMXNKOYIBV-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/19—Tandem OLEDs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/10—Measuring as part of the manufacturing process
- H01L22/12—Measuring as part of the manufacturing process for structural parameters, e.g. thickness, line width, refractive index, temperature, warp, bond strength, defects, optical inspection, electrical measurement of structural dimensions, metallurgic measurement of diffusions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022466—Electrodes made of transparent conductive layers, e.g. TCO, ITO layers
- H01L31/022475—Electrodes made of transparent conductive layers, e.g. TCO, ITO layers composed of indium tin oxide [ITO]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/80—Constructional details
- H10K30/81—Electrodes
- H10K30/82—Transparent electrodes, e.g. indium tin oxide [ITO] electrodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
- H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Definitions
- the present invention relates to an organic electoluminescence element. More specifically, the present invention relates to an organic electoluminescence device having a structure in which two or more organic light emitting layers are laminated via an intermediate conductive layer.
- the cathode Z organic light emitting layer Z anode As one of the technologies for extending the lifetime and improving the efficiency of organic-electral luminescence devices (hereinafter abbreviated as EL-electric luminescence), the cathode Z organic light emitting layer Z anode There are technologies for stacking multiple layers (see, for example, Patent Documents 1 to 3). 0 With this organic EL device, the current density for obtaining the same brightness can be reduced compared to a device with a single unit. There is an advantage that the lifetime of the element can be extended.
- EL-electric luminescence organic-electral luminescence devices
- Patent Document 6 has made it possible to reduce the viewing angle dependence of the emission wavelength by selecting a material in which the difference in refractive index between the organic light emitting layer and the intermediate electrode is within 0.2. A method for reducing the size is disclosed.
- Patent Document 1 Japanese Patent No. 3189438
- Patent Document 2 Japanese Patent Laid-Open No. 11-312584
- Patent Document 3 Japanese Patent Laid-Open No. 11 312585
- Patent Document 4 Japanese Patent Laid-Open No. 11-329748
- Patent Document 5 Japanese Patent Laid-Open No. 2003-45676
- Patent Document 6 International Publication No. 2004Z095892 Pamphlet
- the present invention has been made in view of the above-described problems, and an object thereof is to provide an organic EL element having excellent luminous efficiency and a long lifetime.
- the inventors of the present invention have made extensive studies in order to solve the above-mentioned problems.
- the difference between the refractive index of the intermediate conductive layer and the refractive index of the organic light-emitting layer is within 0.25, and It was found that by using a material containing an oxide for the intermediate conductive layer, the luminous efficiency can be improved and the lifetime can be extended, and the present invention has been completed.
- the following organic EL device can be provided.
- the difference from the bending ratio n is within 0.25, and the intermediate conductive layer contains one or more rare earth elements b
- An organic electoluminescence device containing an acid salt An organic electoluminescence device containing an acid salt.
- the intermediate conductive layer has a refractive index greater than the refractive index n of the organic light emitting layer
- the intermediate conductive layer is a laminate of transparent conductive material and metal halide, or transparent conductive 4.
- the transparent conductive material is composed of an oxide containing at least one element selected from Ce, Nd, Sm, or Gd and at least one element selected from In, Zn, or Sn. Organic eletroluminescence element.
- a long-life and highly efficient organic EL device can be provided.
- FIG. 1 is a diagram showing an embodiment of an organic EL device of the present invention.
- FIG. 2 is a partially enlarged view of FIG.
- FIG. 1 is a diagram showing an embodiment of the organic EL device of the present invention.
- This organic EL device is an example in which two organic light-emitting layers are laminated to form an intermediate conductive layer.
- the organic EL device 1 is formed on a support substrate 10 with a transparent anode (transparent Electrode) 12 is provided, and a cathode (counter electrode) 14 is provided opposite to the transparent anode 12.
- a transparent anode transparent Electrode
- counter electrode cathode
- the organic light-emitting layer 20, 22, 24, 26 and the intermediate conductive layer 30, 32, 34 force so that one intermediate conductive layer is interposed between the two organic light-emitting layers Is provided.
- Light emitted from the organic light emitting layers 20, 22, 24, and 26 is extracted from the support substrate 10 through the transparent anode 12.
- FIG. 2 is a partially enlarged view of the organic light emitting layers 22 and 24 shown in FIG. 1 and the intermediate conductive layer 32 interposed therebetween.
- the organic light emitting layers 22 and 24 also serve as a hole injection layer 200, a light emitting layer 202, and an electron injection layer 204, respectively.
- the holes supplied from the hole injection layer 200 and the electrons supplied from the electron injection layer 204 are combined to emit light.
- the intermediate conductive layer 32 has a hole injecting surface on the organic light emitting layer 22 side and an electron injecting surface on the organic light emitting layer 24 side.
- intermediate conductive layer 32 At least one arbitrary intermediate conductive layer, for example, intermediate conductive layer 32
- the refractive index is n and the refractive index of the organic light-emitting layers 22 and 24 sandwiching the intermediate conductive layer 32 is n, ab
- the difference between the refractive index n of the intermediate conductive layer and the refractive index n of the organic light emitting layer sandwiching the intermediate conductive layer is 0.
- This can suppress the refraction of the light emitted from the light emitting layer inside the device, thereby improving the light extraction efficiency (the light emission efficiency of the device).
- the intermediate conductive layer uses a transparent conductive material containing one or more rare earth element oxides.
- the lifetime of the device can be improved by adding rare earth oxides.
- the four organic light emitting layers 20, 22, 24, 26, and the three intermediate conductive layers 30, 32, 34 may be different or the same.
- the refractive indexes of the organic light emitting layers 22 and 24 may be different, but when the refractive indexes of the organic light emitting layers (first and second organic light emitting layers) 22 and 24 are respectively ⁇ and n,
- the relationship of (iii) is satisfied, and more preferably, all the refractive indexes of the two organic light emitting layers sandwiching the intermediate conductive layer satisfy the above relationship.
- organic light emitting layers are laminated, but two, three, or five or more organic light emitting layers may be laminated.
- the transparent electrode may be a force cathode that is an anode.
- each member of the organic EL element will be described.
- the support substrate is a member for supporting the organic EL element, TFT, and the like, it is preferable that the support substrate is excellent in mechanical strength and dimensional stability.
- a substrate a glass plate, a metal plate, a ceramic plate, or a plastic plate (polycarbonate resin, acrylic resin, vinyl chloride resin, polyethylene terephthalate resin, polyimide resin, polyester resin) Fat, epoxy resin, phenol resin, silicon resin, fluorine resin, etc.).
- the substrate having these material strengths may be further formed with an anti-moisture treatment or hydrophobicity by forming an inorganic film or applying a fluorine resin to avoid intrusion of moisture into the organic EL display device.
- a sex treatment is applied.
- the support substrate side force also extracts light
- the support substrate is preferably transparent with a transmittance of 50% or more for visible light, but the opposite side, that is, the counter electrode.
- the substrate does not necessarily have to be transparent.
- the transparent anode it is preferable to use a metal, an alloy, an electrically conductive compound or a mixture thereof having a high work function (for example, 4. OeV or more).
- a metal, an alloy, an electrically conductive compound or a mixture thereof having a high work function for example, 4. OeV or more.
- ITO indium tin oxide
- indium copper, tin, zinc oxide, gold, platinum, and radium can be used alone or in combination of two or more kinds.
- the thickness of the anode is not particularly limited, but is preferably 10 to: a value within the range of LOOOnm, more preferably a value within the range of 10 to 200 nm.
- the transparent cathode is substantially transparent so that the light emitted from the organic light emitting layer can be effectively extracted outside, more specifically, the light transmittance is a value of 50% or more. I like it.
- a metal, an alloy, an electrically conductive compound or a mixture thereof having a low work function for example, less than 4. OeV.
- a metal, an alloy, an electrically conductive compound or a mixture thereof having a low work function for example, less than 4. OeV.
- one of magnesium, aluminum, indium, lithium, sodium, cesium, silver and the like can be used alone or in combination of two or more.
- the thickness of the cathode is not particularly limited, but is preferably a value within the range of 10 to: LOOOnm, and more preferably within a range of 10 to 200 nm.
- Organic light emitting layer can be defined as a medium including a light-emitting layer capable of EL emission by recombination of electrons and holes. Such an organic light emitting layer can be constituted, for example, by laminating the following layers on the anode.
- a light emission brightness higher than that of d and an excellent durability are usually used preferably.
- Examples of the light-emitting material forming the light-emitting layer include p-quarterphenyl derivatives, P-quintanol derivatives, benzothiazole compounds, benzimidazole compounds, benzoxazole compounds, metal chelate oxinoids Compounds, oxadiazole compounds, styrylbenzene compounds, distyrylvirazine derivatives, butadiene compounds, naphthalimide compounds, perylene derivatives, aldazine derivatives, pyrazirine derivatives, cyclopentagen derivatives, pyrrolopyrrole derivatives, styrylamines Derivatives, tamarin compounds, aromatic dimethylidin compounds, metal complexes having 8-quinolinol derivatives as ligands, polyphenyl compounds, and the like may be used alone or in combination of two or more.
- organic light-emitting materials 4, 4'-bis (2,2-di-tert-butylphenol) biphenyl as an aromatic dimethylidin compound, 4, 4 Bis (2,2-diphenylvinyl) biphenyl (abbreviated as DPVBi) and derivatives thereof are more preferred.
- an organic light-emitting material having a distyrylarylene skeleton or the like is used as a host material, and the host material is a fluorescent dye having a strong blue power as a dopant, such as a tamarin-based material, or a fluorescent material similar to that of the host. Also suitable for use in combination with dye-doped materials It is. More specifically, it is preferable to use the above-mentioned DPVBi or the like as the host material and N, N diphenylaminobenzene or the like as the dopant.
- the light-emitting layer may be formed by laminating two or more light-emitting layers that have the same color or different colors.
- the hole injection layer of the organic light-emitting layer, 1 X 10 4 ⁇ 1 X 10 6 hole mobility forces are measured when applying a voltage in the range of VZcm 1 X 10 _6 cm 2 It is preferable to use a compound having a ZV ′ second or more and an ionization energy of 5.5 eV or less. By providing such a hole injection layer, hole injection into the light emitting layer becomes good, and high emission luminance can be obtained, or low voltage driving can be performed.
- borfilin compound aromatic tertiary amine compound, styrylamine compound, aromatic dimethylidin compound, condensed aromatic ring compound, for example, 4, 4 'bis [N— (1 naphthyl) -N-phenylamino] biphenyl and 4, 4', 4 "-tris [N— (3-methylphenol) —N phenolamino] trif
- aromatic compounds such as enylamine are listed.
- an inorganic compound such as p-type—Si or p-type—SiC as the constituent material of the hole injection layer.
- An organic semiconductor layer having a conductivity of 1 ⁇ 10 _) SZcm or more is provided between the hole injection layer and the anode layer described above or between the hole injection layer and the light emitting layer described above. Is also preferable. By providing such an organic semiconductor layer, hole injection into the light emitting layer is further improved.
- the thickness of the hole injection layer is not particularly limited, but is preferably 10 to 300 nm.
- the electron injection layer of the organic light-emitting layer the electron mobility measured when applying a voltage in the range of 1 X 10 4 ⁇ 1 X 10 6 VZcm is, 1 X 10 _6 cm 2 ZV ' more seconds It is preferable to use a compound having an ionization energy exceeding 5.5 eV.
- a metal complex of 8 hydroxyquinoline (A1 chelate: Alq), a derivative thereof, an oxadiazole derivative, or the like can be given.
- the adhesion improving layer in the organic light emitting layer can be regarded as one form of the electron injection layer. That is, among the electron injecting layers, it is a layer having particularly good material strength with good adhesion to the cathode, and it is also preferable to constitute a metal complex of 8-hydroxyquinoline or a derivative thereof. Note that it is also preferable to provide an organic semiconductor layer having a conductivity of 1 ⁇ 10 — 1 SZcm or more in contact with the above-described electron injection layer. By providing such an organic semiconductor layer, the electron injection property into the light emitting layer is further improved.
- the thickness of the electron injection layer is not particularly limited, but is preferably 10 to 300 nm.
- the thickness of the organic light emitting layer can be preferably set within a range of 5 nm to 5 m.
- the reason for this is that when the thickness of the organic light emitting layer is less than 5 nm, the light emission luminance and durability may decrease, whereas when the thickness of the organic light emitting layer exceeds 5 m, the value of the applied voltage increases. This is because there are cases. Therefore, it is more preferable to set the thickness of the organic light emitting layer to a value within the range of 10 ⁇ to 3 / ⁇ m, and even more preferable to set a value within the range of 20 ⁇ to 1 / ⁇ ⁇ .
- the intermediate conductive layer is interposed between adjacent organic light-emitting layers and has various functions as long as it has a function of injecting holes from one surface and injecting other surface force electrons. It can be used.
- Examples of the material constituting the intermediate conductive layer include In O, ITO (indium tin oxide).
- Id indium zinc oxide
- IZO indium zinc oxide
- SnO zinc oxide
- ZnO zinc oxide
- TiN zinc oxide
- ZrN zinc oxide
- HfN titanium oxide
- TiOx vanadium zinc oxide
- a transparent conductive material to which a rare earth element oxide is added can be used.
- the transparent conductive material is an oxide containing one or more rare earth elements selected from Ce, Nd, Sm, or Gd and one or more elements selected from In, Zn, or Sn. It is preferable that it consists of.
- the addition amount of the rare earth element oxide in the transparent conductive material is determined within a range not impairing the conductivity, and is preferably 1 to 30% by weight.
- the refractive index of the intermediate conductive layer and the presence of The difference from the refractive index of the organic light emitting layer should be within 0.25. Therefore, the intermediate conductive layer includes a layer having a refractive index larger than the refractive index n of the organic light emitting layer and a layer having a refractive index smaller than the refractive index n.
- the mixture of materials exhibiting a refractive index smaller than the refractive index n is preferable that the mixture of materials exhibiting a refractive index smaller than the refractive index n.
- the refractive index of the organic light-emitting layer and a low refractive index material such as a metal halide such as a metal fluoride represented by LiF, as long as the charge injection property of the intermediate conductive layer is not impaired.
- a film made of a mixture of the above transparent conductive material exhibiting a higher refractive index or a multilayer film in which a metal fluoride and a transparent conductive material are laminated can be used.
- the intermediate conductive layer in which a transparent conductive material and a low refractive index material such as a metal halide are mixed is prepared, for example, by preparing two vapor deposition sources, filling the respective vapor deposition sources, and co-depositing them.
- the refractive index can be controlled by the rate of each deposition.
- the low refractive index material is a metal halide such as LiF
- an increase in the ratio is not preferable because the conductivity of the intermediate conductive layer deteriorates and tends not to mix homogeneously.
- the ratio of metal halide in the film is preferably less than 0.6 (weight ratio).
- the function of the intermediate conductive layer can be maintained.
- a layered structure is possible, it is preferable to have a three-layer structure of transparent conductive material Z low refractive index material Z transparent conductive material!
- the film thickness ratio of the low refractive index material to the film thickness of the intermediate conductive layer is preferably smaller than 0.6.
- the absorption coefficient of the intermediate conductive layer for visible light is 2.5 [1Z m] or less. [1 / m] or less is preferable.
- the absorption coefficient is 2.5 [lZ wm] or less, for example, when the thickness of the intermediate conductive layer is 30 nm, the transmittance of the intermediate conductive layer is 92%. This is 86% for the two layers and 80% for the three layers, but the transmittance decreases, but it can be kept high to some extent.
- many transparent conductive materials have an extinction coefficient exceeding 0.1, but materials represented by LiF have almost zero extinction coefficient. Therefore, the absorption coefficient is reduced by mixing or laminating a transparent conductive material and a low refractive index material. There is also an effect that the luminous efficiency can be increased.
- the absorption coefficient of all the intermediate conductive layers is 2.5 [1 / ⁇ m] or less.
- the oxygen partial pressure during sputtering [oxygen Z (oxygen + argon)
- the refractive index of the organic light emitting layer and the intermediate conductive layer is defined as an equivalent refractive index.
- the definition of the refractive index of the intermediate conductive layer with respect to light of a wavelength in the case where a film made of a high refractive index material and a film made of a low refractive index material are laminated will be described.
- the film thickness of the high refractive index material is d
- the refractive index is n
- the film thickness of the low refractive index material layer is d
- the refractive index is n.
- Equation (2) the 2 X 2 matrix ⁇ is defined as Equation (2).
- Equation (3) the equivalent refractive index N of the laminated film is defined as in Equation (3).
- the refractive index of the entire organic light emitting layer can be expressed by the above formulas (1) to (3) as long as the refractive index of the hole injecting material, light emitting material, electron injecting material, etc. forming the organic light emitting layer is divided. Can be defined in the same way as The refractive index of the material forming the organic light emitting layer is often about 1.7 to 1.8, and as a result, the equivalent refractive index of the organic light emitting layer is also about 1.7 to 1.8. Therefore, the refractive index of the intermediate conductive layer is preferably in the range of 1.5 to 2.0. From the viewpoint that the absorption coefficient is preferably 2.5 [1Z m] or less, the extinction coefficient is 0.1 or less. It is preferable.
- a 25 mm x 75 mm support substrate (OA2 glass: manufactured by Nippon Electric Glass Co., Ltd.) was ultrasonically cleaned in pure water and isopropyl alcohol, dried by air blow, and then UV cleaned. Next, this substrate was moved to a sputtering apparatus, and ITO was deposited to a thickness of 150 nm.
- this substrate is moved to the organic vapor deposition device, the substrate is fixed to the substrate holder, the vacuum chamber is decompressed to 5 X 10 _7 torr, and then the hole injection layer, the light emitting layer, and the electron injection material are sequentially formed did.
- DPVBi 2, 2 diphenyl biphenyl
- the dopant was 1, 4— Bis [4- (N, N diphenylaminostyrylbenzene)] (DP AVB) was co-evaporated at a deposition rate of 0.003 to 0.008 nm Z seconds to a film thickness of 40 nm.
- ITCO lithium fluoride
- LiF lithium fluoride
- an organic light emitting layer, an intermediate conductive layer and an organic light emitting layer are further added in the same manner as the organic light emitting layer and the intermediate conductive layer in (1) and (2) above.
- a film was formed.
- aluminum was formed to a thickness of 150 nm as a cathode to obtain an organic EL element (including three organic light emitting layers and two intermediate conductive layers).
- the hole injecting layer, the light emitting layer, and the electron injecting layer were individually formed with a thickness of 0.2 microns by the method (2) above.
- the refractive index for light having a wavelength of 500 nm was measured with a meter.
- the equivalent refractive index of the organic light emitting layer was determined using the film thickness values of (2) above and found to be 1.79.
- ITCO and lithium fluoride were individually deposited on a glass substrate by the method (3) above, and the refractive index for light with a wavelength of 500 nm was measured with an ellipsometer.
- the refractive index of ITCO was 2.1, and the refractive index of lithium fluoride was 1.4.
- the difference between the equivalent refractive index of the organic light-emitting layer and the equivalent refractive index of the intermediate conductive layer is 0.06.
- the absorption coefficient was measured using an absorbance meter for the intermediate conductive layer and found to be 2. 13 [lZ w m].
- the device was illuminated with 2000 cdZm 2 and the time (half life) until the luminance became half that of lOOOcdZm 2 was measured and found to be 2400 hours.
- the refractive index of the intermediate conductive layer was 1.95, and the absorption coefficient was 2.12 [lZwm].
- the difference between the equivalent refractive index of the organic light emitting layer and the equivalent refractive index of the intermediate conductive layer was 0.16.
- the brightness of the organic EL element in the front direction was 355 nits, and the half-life was 2250 hours.
- An organic EL device was prepared and evaluated in the same manner as in Example 1 except that the thickness was changed to 30 nm.
- the refractive index of the intermediate conductive layer was 2.04, and the absorption coefficient was 2.58 [lZwm].
- the difference between the equivalent refractive index of the organic light emitting layer and the equivalent refractive index of the intermediate conductive layer was 0.25.
- the brightness of the organic EL element in the front direction was 280 nits, and the half-life was 1800 hours.
- An organic EL device was fabricated and evaluated in the same manner as in Example 3 except that the light emitting layer was a laminated type of a blue light emitting layer and an orange light emitting layer as described below.
- An orange light emitting layer was first laminated on the hole injection layer, and then a blue light emitting layer was laminated.
- the orange light-emitting medium was formed so that the material represented by the following formula (1) and the material represented by the following formula (2) had a weight ratio of 5: 0.01 and a film thickness of 5 nm.
- the blue light-emitting medium was formed so that the material represented by the following formula (1) and the material represented by the following formula (3) had a weight ratio of 35: 0.8 and a film thickness of 35 nm.
- the refractive index of the organic light emitting layer was 1.79 as in the other examples.
- the refractive index of the intermediate conductive layer was 1.95, and the absorption coefficient was 2.52 [lZ w m].
- the difference between the equivalent refractive index of the organic light emitting layer and the equivalent refractive index of the intermediate conductive layer was 0.16.
- the brightness of the organic EL element in the front direction was 338 nits, and the half-life was 2900 hours.
- the intermediate conductive layer is a single layer film of V 2 O (thickness 30 nm).
- An organic EL device was fabricated by the method and evaluated.
- the refractive index of the intermediate conductive layer was 2.20, and the absorption coefficient was 3.02 [lZ wm].
- the difference between the equivalent refractive index of the organic light emitting layer and the equivalent refractive index of the intermediate conductive layer was 0.41.
- the brightness of the organic EL element in the front direction was 320 nits, and the half-life was 1200 hours.
- the refractive index of the intermediate conductive layer was 1.90, and the absorption coefficient was 1.95 [lZ w m].
- the difference between the equivalent refractive index of the organic light emitting layer and the equivalent refractive index of the intermediate conductive layer was 0.16.
- the brightness of the organic EL element in the front direction was 160 nits, and the half-life was 800 hours.
- the organic EL device of the present invention can be suitably used as a light source for various display devices such as consumer TVs, large display displays, mobile phone display screens, and various lighting devices in combination with known configurations.
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Abstract
Description
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EP06746097A EP1881742A1 (en) | 2005-05-11 | 2006-05-08 | Organic electroluminescence element |
US11/913,272 US20090066228A1 (en) | 2005-05-11 | 2006-05-08 | Organic electroluminescence element |
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JP2011175952A (ja) * | 2010-02-24 | 2011-09-08 | Samsung Mobile Display Co Ltd | 有機発光表示装置及びその製造方法 |
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JP6548359B2 (ja) * | 2014-05-12 | 2019-07-24 | キヤノン株式会社 | 有機発光素子 |
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CN100396813C (zh) * | 2002-08-02 | 2008-06-25 | 出光兴产株式会社 | 溅射靶、烧结体及利用它们制造的导电膜、有机el元件及其所用的衬底 |
US7164228B2 (en) * | 2002-12-27 | 2007-01-16 | Seiko Epson Corporation | Display panel and electronic apparatus with the same |
TWI312582B (en) * | 2003-07-24 | 2009-07-21 | Epistar Corporatio | Led device, flip-chip led package and light reflecting structure |
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2006
- 2006-05-08 KR KR1020077025696A patent/KR20080005409A/ko not_active Application Discontinuation
- 2006-05-08 WO PCT/JP2006/309266 patent/WO2006121015A1/ja active Application Filing
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- 2006-05-08 CN CNA2006800163549A patent/CN101176384A/zh active Pending
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JPH11329748A (ja) * | 1998-05-20 | 1999-11-30 | Idemitsu Kosan Co Ltd | 有機el発光素子およびそれを用いた発光装置 |
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TW200711523A (en) | 2007-03-16 |
US20090066228A1 (en) | 2009-03-12 |
JP2006318697A (ja) | 2006-11-24 |
CN101176384A (zh) | 2008-05-07 |
EP1881742A1 (en) | 2008-01-23 |
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