WO2006001333A1 - 多環芳香族系化合物、発光性塗膜形成用材料及びそれを用いた有機エレクトロルミネッセンス素子 - Google Patents
多環芳香族系化合物、発光性塗膜形成用材料及びそれを用いた有機エレクトロルミネッセンス素子 Download PDFInfo
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- WO2006001333A1 WO2006001333A1 PCT/JP2005/011537 JP2005011537W WO2006001333A1 WO 2006001333 A1 WO2006001333 A1 WO 2006001333A1 JP 2005011537 W JP2005011537 W JP 2005011537W WO 2006001333 A1 WO2006001333 A1 WO 2006001333A1
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- -1 Polycyclic aromatic compound Chemical class 0.000 title claims abstract description 154
- 239000000463 material Substances 0.000 title claims abstract description 66
- 238000000576 coating method Methods 0.000 title claims abstract description 18
- 239000011248 coating agent Substances 0.000 title claims abstract description 15
- 239000010409 thin film Substances 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 239000003960 organic solvent Substances 0.000 claims abstract description 5
- 125000004432 carbon atom Chemical group C* 0.000 claims description 39
- 125000003118 aryl group Chemical group 0.000 claims description 31
- 239000000126 substance Substances 0.000 claims description 30
- 125000004429 atom Chemical group 0.000 claims description 24
- 125000005647 linker group Chemical group 0.000 claims description 14
- 125000000217 alkyl group Chemical group 0.000 claims description 11
- 125000006615 aromatic heterocyclic group Chemical group 0.000 claims description 11
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 125000004122 cyclic group Chemical group 0.000 claims description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 10
- 150000001721 carbon Chemical class 0.000 claims description 8
- 125000004104 aryloxy group Chemical group 0.000 claims description 7
- 125000003545 alkoxy group Chemical group 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 125000005843 halogen group Chemical group 0.000 claims description 5
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- 125000001725 pyrenyl group Chemical group 0.000 claims description 5
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- 125000003710 aryl alkyl group Chemical group 0.000 claims description 4
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 3
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- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 3
- 229910052732 germanium Inorganic materials 0.000 claims description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical group [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
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- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 3
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- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 claims description 3
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- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052707 ruthenium Inorganic materials 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
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- 239000000758 substrate Substances 0.000 description 17
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- 230000000052 comparative effect Effects 0.000 description 13
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- 239000002904 solvent Substances 0.000 description 8
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 8
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- 239000011734 sodium Substances 0.000 description 7
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 6
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- 239000007983 Tris buffer Substances 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 150000001340 alkali metals Chemical class 0.000 description 6
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Natural products C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 230000005684 electric field Effects 0.000 description 6
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 6
- 125000005493 quinolyl group Chemical group 0.000 description 6
- 238000005160 1H NMR spectroscopy Methods 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229940125898 compound 5 Drugs 0.000 description 5
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- 238000004519 manufacturing process Methods 0.000 description 5
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- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 5
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- ORILYTVJVMAKLC-UHFFFAOYSA-N adamantane Chemical compound C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 description 4
- 229910001508 alkali metal halide Inorganic materials 0.000 description 4
- 150000008045 alkali metal halides Chemical class 0.000 description 4
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- 239000007864 aqueous solution Substances 0.000 description 4
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 4
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- 150000004696 coordination complex Chemical group 0.000 description 4
- MGNZXYYWBUKAII-UHFFFAOYSA-N cyclohexa-1,3-diene Chemical compound C1CC=CC=C1 MGNZXYYWBUKAII-UHFFFAOYSA-N 0.000 description 4
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- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 2
- MNCMBBIFTVWHIP-UHFFFAOYSA-N 1-anthracen-9-yl-2,2,2-trifluoroethanone Chemical group C1=CC=C2C(C(=O)C(F)(F)F)=C(C=CC=C3)C3=CC2=C1 MNCMBBIFTVWHIP-UHFFFAOYSA-N 0.000 description 2
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
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- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
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- 101000988651 Homo sapiens Humanin-like 1 Proteins 0.000 description 2
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- PCLIMKBDDGJMGD-UHFFFAOYSA-N N-bromosuccinimide Chemical compound BrN1C(=O)CCC1=O PCLIMKBDDGJMGD-UHFFFAOYSA-N 0.000 description 2
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- 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
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- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 125000004076 pyridyl group Chemical group 0.000 description 1
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- 150000003839 salts Chemical class 0.000 description 1
- 239000005368 silicate glass Substances 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
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- 239000005361 soda-lime glass Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000008279 sol Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 239000003760 tallow Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 150000003613 toluenes Chemical class 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 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
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
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- C07C13/28—Polycyclic hydrocarbons or acyclic hydrocarbon derivatives thereof
- C07C13/32—Polycyclic hydrocarbons or acyclic hydrocarbon derivatives thereof with condensed rings
- C07C13/72—Spiro hydrocarbons
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- C07C13/28—Polycyclic hydrocarbons or acyclic hydrocarbon derivatives thereof
- C07C13/32—Polycyclic hydrocarbons or acyclic hydrocarbon derivatives thereof with condensed rings
- C07C13/54—Polycyclic hydrocarbons or acyclic hydrocarbon derivatives thereof with condensed rings with three condensed rings
- C07C13/547—Polycyclic hydrocarbons or acyclic hydrocarbon derivatives thereof with condensed rings with three condensed rings at least one ring not being six-membered, the other rings being at the most six-membered
- C07C13/567—Polycyclic hydrocarbons or acyclic hydrocarbon derivatives thereof with condensed rings with three condensed rings at least one ring not being six-membered, the other rings being at the most six-membered with a fluorene or hydrogenated fluorene ring system
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
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- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
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- 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
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- C07C2603/04—Ortho- or ortho- and peri-condensed systems containing three rings
- C07C2603/06—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members
- C07C2603/10—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members containing five-membered rings
- C07C2603/12—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members containing five-membered rings only one five-membered ring
- C07C2603/18—Fluorenes; Hydrogenated fluorenes
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- C07C2603/02—Ortho- or ortho- and peri-condensed systems
- C07C2603/04—Ortho- or ortho- and peri-condensed systems containing three rings
- C07C2603/22—Ortho- or ortho- and peri-condensed systems containing three rings containing only six-membered rings
- C07C2603/24—Anthracenes; Hydrogenated anthracenes
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- C07C2603/40—Ortho- or ortho- and peri-condensed systems containing four condensed rings
- C07C2603/42—Ortho- or ortho- and peri-condensed systems containing four condensed rings containing only six-membered rings
- C07C2603/48—Chrysenes; Hydrogenated chrysenes
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- C07C2603/40—Ortho- or ortho- and peri-condensed systems containing four condensed rings
- C07C2603/42—Ortho- or ortho- and peri-condensed systems containing four condensed rings containing only six-membered rings
- C07C2603/50—Pyrenes; Hydrogenated pyrenes
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- C07C2603/52—Ortho- or ortho- and peri-condensed systems containing five condensed rings
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- C07C2603/94—Spiro compounds containing "free" spiro atoms
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- C09K2211/10—Non-macromolecular compounds
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- C09K2211/1018—Heterocyclic compounds
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- C09K2211/1029—Heterocyclic compounds characterised by ligands containing one nitrogen atom as the heteroatom
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- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1018—Heterocyclic compounds
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- C09K2211/1074—Heterocyclic compounds characterised by ligands containing more than three nitrogen atoms as heteroatoms
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- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
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- C09K2211/185—Metal complexes of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
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- H10K50/00—Organic light-emitting devices
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- H10K85/324—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3] comprising aluminium, e.g. Alq3
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- 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
- H10K85/623—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene containing five rings, e.g. pentacene
-
- 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
Definitions
- the present invention relates to a polycyclic aromatic compound and an organic electoluminescence (EL) device using the same, and in particular, an organic EL device having high luminous efficiency and a long lifetime, and a novel multi-device that realizes the same.
- the present invention relates to a ring aromatic compound and a material for forming a luminescent coating film.
- An organic electoluminescence element is a self-luminous element that utilizes the principle that a fluorescent substance emits light by recombination energy of holes injected from an anode and electrons injected from a cathode when an electric field is applied. is there.
- Eastman 'Kodak's CW Tang et al Reported on low voltage drive organic EL devices using stacked devices (CW Tang, SA Vanslyke, Applied Physics Letters, 51 ⁇ , 913, 1987, etc.). Since then, research on organic EL devices using organic materials as constituent materials has been actively conducted. Tang et al. Use tris (8-quinolinolato) aluminum for the light-emitting layer and triphenyldiamin derivative for the hole-transporting layer.
- the advantages of the stacked structure are that it increases the efficiency of hole injection into the light-emitting layer, blocks the electrons injected from the cathode, and increases the generation efficiency of excitons generated by recombination. For example, confining excitons.
- the device structure of the organic EL element is a hole transport (injection) layer, a two-layer type of an electron transporting light emitting layer, or a hole transport (injection) layer, a light emitting layer, an electron transport (injection).
- the three-layer type) is well known.
- the element structure and the formation method have been devised in order to increase the recombination efficiency of injected holes and electrons.
- chelate complexes such as tris (8-quinolinolato) aluminum complex
- luminescent materials such as coumarin derivatives, tetraphenol butadiene derivatives, bisstyryl arylene derivatives, oxadiazole derivatives and the like are known. Since then, it has been reported that light emission in the visible region up to blue power red can be obtained, and the realization of a color display element is expected. (For example, Patent Document 1, Patent Document 2, Patent Document 3, etc.).
- Patent Document 4 discloses a device using a phenylanthracene derivative as a light emitting material. Further, Patent Document 5 discloses a material having a naphthyl group at 9th and 10th positions of anthracene. Such anthracene derivatives are used as blue light emitting materials, but there has been a demand for improvement in device lifetime.
- Patent Document 6 a material having a fluoranthene group at the 9th and 10th positions of anthracene is disclosed in Patent Document 6.
- Such anthracene derivatives are used as blue light-emitting materials, but there has been a demand for improvement in element lifetime.
- Patent Literature 7 Patent Literature 8
- Patent Literature 9 Patent Literature 10 disclose light emitting materials having a fluorene skeleton.
- a phosphorescent material in addition to the fluorescent material for the light emitting layer of the organic EL element (see, for example, Non-Patent Document 1 and Non-Patent Document 2).
- the organic light emitting layer, the electron transport layer (hole blocking layer), the electron injection layer, and the cathode are sequentially arranged so that the triplet excited state or triplet exciton is not quenched.
- a structure in which layers are laminated is used, and a host compound and a phosphorescent compound are used for the organic light emitting layer (see, for example, Patent Document 11 and Patent Document 12).
- 4,4-N, N Dicarbazole biphenyl has been used as a host compound. This compound has a glass transition temperature of 110 ° C or less and is too symmetric to crystallize. Immediately, when the heat resistance test of the element was performed, there was a problem that a short circuit or a pixel defect occurred.
- Patent Document 1 Japanese Patent Application Laid-Open No. 8-239655
- Patent Document 2 JP-A-7-183561
- Patent Document 3 Japanese Patent Laid-Open No. 3-200289
- Patent Document 4 JP-A-8-12600
- Patent Document 5 JP-A-11-3782
- Patent Document 6 Japanese Patent Laid-Open No. 2001-257074
- Patent Document 7 Japanese Patent Laid-Open No. 2002-326965
- Patent Document 8 Japanese Patent Application Laid-Open No. 2004-2298
- Patent Document 9 Japanese Patent Laid-Open No. 2004-83481
- Patent Document 10 Japanese Patent Application Laid-Open No. 2004-83483
- Patent Document 11 U.S. Pat.No. 6,097,147
- Patent Document 12 International Publication WO01Z41512
- Non-Patent Document 1 D. F. OBrien and M. A. Baldoetal, "Improved energy trans fer in electrophosphorescent devices", Applied Physics letters, Vol. 74, No. 3, pp 442-444, January 18, 1999
- Non-Patent Document 2 M. A. Baldoetal, Very nigh -efficiency green organic light-emitting devices based on electrophosphorescence, Applied Physics lett ers, Vol. 75, No. 1, pp 4-6, July 5, 1999
- the present invention has been made to solve the above-mentioned problems, and has a high luminous efficiency and a long lifetime.
- the present invention provides a polycyclic aromatic compound represented by the following general formula (1): Is.
- X and X ′ are each independently a substituted or unsubstituted aromatic group having 6 to 50 carbon atoms, or a substituted or unsubstituted aromatic heterocyclic ring having 5 to 50 nuclear atoms.
- the group is the same or different.
- ⁇ is a divalent group containing at least one linking group represented by the following general formula (2) or (3),
- R and R to R are each independently substituted or unsubstituted.
- a structure may be formed.
- L represents a single bond,-(CR'R ")-,-(SiR'R")-, -O-, -CO- or -NR,-.
- R ′ and R ′′ are each independently a hydrogen atom, a substituted or unsubstituted aromatic group having 6 to 50 nuclear carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 5 to 50 nuclear atoms, or A substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, c is an integer of 1 to 10, and R ′ and R "may be the same or different.
- Z is a carbon atom, a silicon atom or a germanium atom.
- Q is a cyclic structure-forming group.
- a and b are each an integer of 0 to 4, and c is an integer of 0 to 2.
- the present invention comprises a light-emitting coating film forming material comprising an organic solvent solution containing the polycyclic aromatic compound, and one or more layers including at least a light-emitting layer between a cathode and an anode.
- a light-emitting coating film forming material comprising an organic solvent solution containing the polycyclic aromatic compound, and one or more layers including at least a light-emitting layer between a cathode and an anode.
- the organic thin film layer in which the organic thin film layer is sandwiched, at least one layer of the organic thin film layer provides the organic EL device containing the polycyclic aromatic compound alone or as a component of the mixture. .
- the organic EL device using the polycyclic aromatic compound and the light-emitting coating film forming material of the present invention has high luminous efficiency and long life.
- the polycyclic aromatic compound of the present invention is a compound represented by the following general formula (1).
- X and X ′ are each independently a substituted or unsubstituted aromatic group having 6 to 50 carbon atoms, or a substituted or unsubstituted aromatic heterocyclic ring having 5 to 50 nuclear atoms.
- the groups may be the same or different.
- Examples of the substituted or unsubstituted aromatic group having 6 to 50 carbon atoms of X and X include a phenyl group, a 2-bifluoro-allyl group, a 3-bifluoro-allyl group, a 4-bifluoro-allyl group, and terferyl.
- Anthryl group 9-phenanthryl group, 1-pyrenyl group, chrysyl group, naphthasel group, coronyl group and the like can be mentioned.
- Examples of the substituted or unsubstituted aromatic heterocyclic group having 5 to 50 nucleus atoms of X and X include carbazolyl group, dibenzofuryl group, dibenzothiol-zole group, fluorenol group, oxazolyl group, oxaziazolyl group , Thiadiazole group, benzimidazole group and the like.
- X and Z or X ′ are preferably a pyrenyl group or a chrysyl group.
- Y is a divalent group containing at least one linking group represented by the following general formula (2) or (3).
- R and R to R are each independently substituted or unsubstituted.
- Examples include 1 pyrrolyl group, 2 pyrrolyl group, 3 pyrrolyl group, pyrajur group, 2 pyridyl group Group, 3-pyridyl group, 4 pyridyl group, 1 indolyl group, 2 indolyl group, 3—indolyl group, 4—indolyl group, 5—indolyl group, 6—indolyl group, 7—indolyl group, 1 —Isoindolyl group, 2-Isoindolyl group, 3-Isoindolyl group, 4-Isoindolyl group, 5 Isoindolyl group, 6 Isoindolyl group, 7 Isoindolyl group, 2 Furyl group, 3-Furyl group, 2 Benzofural group, 3 Benzofura group -L group, 4 benzofural group, 5-benzobenzol group, 6 benzofural group, 7 benzof
- the substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms of R and R to R is OY '
- Examples of Y ′ include the same examples as those mentioned for the alkyl group.
- Benzyl group 1-phenylethyl group, 2-phenylethyl group, 1-phenylisopropyl group, 2-phenylisopropyl group, tert-butyl group, ⁇ -naphthylmethyl group, 1 ⁇ Naphthylethyl, 2-a naphthylethyl, 1-a naphthylisopropyl, 2-a naphthylisopropyl, 13 naphthylmethyl, 1 ⁇ -naphthylethyl, 2- ⁇ naphthylyl, 1- ⁇ naphthylisopropyl, 2- ⁇ naphthylisopropyl group, 1 pyrrolylmethyl group, 2- (1 pyrrolyl) ethyl group, ⁇ -methinolevendinore group, m-methinolevendinore group, o-methinolevendinore group, p-clonal benzyl group, m—
- R and R to R substituted or unsubstituted aryloxy group having 5 to 50 nuclear atoms
- OY a substituted or unsubstituted arylylthio group having 5 to 50 nuclear atoms is a group represented by SY", and examples of Y "are the same as those mentioned for the aromatic group. Is mentioned.
- halogen atoms for R and R to R include fluorine, chlorine, bromine and iodine.
- a shaped structure may be formed.
- the cyclic structure include cycloalkanes having 4 to 12 carbon atoms such as cyclobutane, cyclopentane, cyclohexane, adamantane and norbornane, and 4 to 12 carbon atoms such as cycloalkane, cyclobutene, cyclopentene, cyclohexene, cycloheptene and cyclootaten.
- Aromatics having 6 to 50 carbon atoms such as cycloalkadienes such as cycloalkene, cyclohexadiene, cyclohexabutadiene, cyclotagen, etc., such as cycloalkadienes, benzene, naphthalene, phenanthrene, anthracene, pyrene, taricene, and isanaphthylene.
- cycloalkadienes such as cycloalkene, cyclohexadiene, cyclohexabutadiene, cyclotagen, etc., such as cycloalkadienes, benzene, naphthalene, phenanthrene, anthracene, pyrene, taricene, and isanaphthylene.
- a ring is mentioned.
- a and b are each an integer of 0 to 4
- c is an integer of 0 to 2
- L is a single Bond, (CR'R ") one, (SiR'R”) one, O—, —CO or —NR, one.
- R ′ and R ′′ are each independently a hydrogen atom, a substituted or unsubstituted nuclear carbon number of 6 to 50 Or a substituted or unsubstituted aromatic heterocyclic group having 5 to 50 nuclear atoms, or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms.
- c is an integer of 1 to 10, and R ′ and R ′′ may be the same or different.
- R′R ′ ′ examples include the same groups as those described above for Y.
- Z is a carbon atom, a silicon atom or a germanium atom.
- Q is a cyclic structure-forming group, and examples of the cyclic structure formed by Z-Q include carbons such as cyclobutane, cyclopentane, cyclohexane, adamantane, and norbornane.
- cycloalkane such as cycloalkane, cyclobutene, cyclopentene, cyclohexene, cycloheptene, cyclootaten, etc.4 to 12 carbon atoms such as cycloalkene, cyclohexagen, cyclohexadiene, cyclooctacene, etc.
- aromatic rings having 6 to 50 carbon atoms such as 12 cycloalkylenocadiens, benzene, naphthalene, phenanthrene, anthracene, pyrene, taricene, and acenaphthylene.
- the polycyclic aromatic compound of the present invention is the above general formula (1), wherein X and Z or X 'is a substituted or unsubstituted aromatic group having 16 to 50 carbon atoms, wherein Y is A divalent group including at least one linking group represented by any one of the general formulas (4) to (6) is preferable.
- Examples of the substituted or unsubstituted aromatic group having 16 to 50 carbon atoms of X and Z or X ′ include a 1-pyrenyl group, a chrysyl group, a naphthasel group, a mouthpiece group, etc.
- a 1-pyrenyl group and a chrysenyl group are preferred.
- R and R to R are independently the same as R and R to R, respectively. Specifically, the same can be mentioned.
- Examples of structures include those described for R and R, and R and R.
- L and Z are independently the same as described above.
- d is an integer of 0 to 3
- e is an integer of 0 to 4, respectively.
- p, q and r are integers of 1 to 10.
- Y is preferably a divalent group including at least one linking group represented by the following general formula (7).
- R 1 to R 5 are each independently the same as R and R to R, and
- R and R, and R and R may be bonded to each other to form a cyclic structure.
- Y is preferably a linking group represented by the following general formula (8) or (8 ').
- Ar and Ar are each independently substituted or unsubstituted.
- Examples of the aromatic group include divalent aromatic groups having 6 to 12 carbon atoms, and examples of the aromatic group include those exemplified as X and X ′ described above as divalent groups.
- L and L are linking groups represented by any one of the general formulas (4) to (6).
- L and L may be the same or different.
- L ′ and L ′ are linking groups represented by the general formula (7), and L ′ and L ′ are linking groups represented by the general formula (7), and L ′ and L ′
- k and m are integers of 0 to 5, and n is an integer of 0 or 1. However, k, m, and n are not all zero.
- the polycyclic aromatic compound of the present invention is more preferably a host material for an organic EL device, preferably an organic EL device material.
- polycyclic aromatic compound represented by the general formula (1) of the present invention are shown below, but are not limited to these exemplified compounds.
- the organic EL device of the present invention is an organic electoluminescence device in which an organic thin film layer composed of one or more layers including at least a light emitting layer is sandwiched between a cathode and an anode. At least one of the organic thin film layers contains the polycyclic aromatic compound alone or as a component of a mixture.
- Anode Z Inorganic semiconductor layer Z Insulating layer Z Light emitting layer Z Insulating layer Z Cathode
- Anode z Insulating layer Z hole injection layer Z hole transport layer Z light emitting layer Z electron injection layer Z force which can mention structures such as a cathode It is not limited to these.
- the compound of the present invention may be used in any of the organic layers described above, but it is preferable that the compound is contained in the light emission band or the hole transport band in these constituent elements. 100% mono is preferred!
- the light emitting layer contains a polycyclic aromatic compound represented by the general formula (1) as 10 to LOO mol%, 50 to 99 Monore 0/0 force further preferred.
- the light emitting layer may contain a polycyclic aromatic compound represented by the general formula (1) and a fluorescent or fluorescent dopant.
- a styrylamine compound represented by the following general formula (9) or an arylamine compound represented by the general formula (10) can be preferably used.
- a styrylamine compound represented by the following general formula (9) or an arylamine compound represented by the general formula (10) can be preferably used.
- Ar 3 is a group selected from phenyl, biphenyl, terfel, stilbene and distyryl aryl, and Ar 4 and Ar 5 are each a hydrogen atom or 6 carbon atoms. Is an aromatic group of ⁇ 20, and Ar 3 to Ar 5 may be substituted.
- p ′ is an integer of 1 to 4. More preferably, Ar 4 and Z or Ar 5 are substituted with a styryl group.
- the aromatic group having 6 to 20 carbon atoms is preferably a phenol group, a naphthyl group, an anthryl group, a phenanthryl group, a terphenyl group, or the like.
- Ar ° to Ar 8 are aryl groups having 5 to 40 nuclear carbon atoms which may be substituted. q is an integer from 1 to 4. ]
- aryl groups having 5 to 40 nuclear atoms include phenol, naphthyl, anthral, phenanthryl, pyrenyl, coloninole, biphenyl, terphenyl, pyrrolyl, furanyl, thiophenyl, benzothiophenyl, Oxaziazolyl, diphenylanthranyl, Nyldol, carbazolyl, pyridyl, benzoquinolyl, fluoranthenyl, acenaphthofluoranthur, stilbene and the like are preferable.
- the aryl group having 5 to 40 nucleus atoms may be further substituted with a substituent.
- Examples of the preferable substituent include an alkyl group having 1 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 atomic atoms, number of nuclear atoms An amino group substituted with an aryl group of 5 to 40, an ester group having an aryl group of 5 to 40 nuclear atoms, an ester group having an alkyl group of 1 to 6 carbon
- the phosphorescent dopant medium strengths of iridium (Ir), ruthenium (Ru), noradium (Pd), platinum (Pt), osmium (Os) and rhenium (Re) are also selected.
- a ligand that is preferably a metal complex containing at least one metal, it is preferable to have at least one skeleton selected from a group force consisting of a phenylviridine skeleton, a bibilidyl skeleton, and a phenantorin skeleton.
- metal complexes include, for example, tris (2-phenol-pyridine) iridium, tris (2-phenol-pyridine) ruthenium, tris (2-phenolpyridine) palladium, bis (2-vinylpyridine).
- Powers such as platinum, tris (2-phenolpyridine) osmium, tris (2-phenol-pyridine) rhenium, otaethyl platinum porphyrin, octafel platinum porphyrin, otaethyl palladium porphyrin, octaphenyl palladium porphyrin, etc.
- the required emission color, device performance, and the relationship with the host compound are not limited to these. Appropriate complexes are selected.
- the organic EL device of the present invention is produced on a translucent substrate.
- the translucent 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.
- Glass plates include soda lime glass, glass containing strontium, lead glass, aluminosilicate glass, boron Examples thereof include silicate glass, norium borosilicate glass, and quartz.
- the polymer plate include polycarbonate, acrylic, polyethylene terephthalate, polyether sulfide, and polysulfone.
- 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.
- the anode material used in the present invention indium tin oxide alloy (ITO), acid tin (NESA), gold, silver, platinum, copper and the like can be applied.
- the cathode is preferably a material having a low work function for the purpose of injecting electrons into the electron transport layer or the light emitting layer.
- the anode 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 anode for light emission is greater than 10%.
- the sheet resistance of the anode is preferably several hundred ⁇ or less.
- the film thickness of the anode is a force depending on the material. Usually, it is selected in the range of 10 nm to l ⁇ m, preferably 10 to 200 nm.
- the light emitting layer of the organic EL device of the present invention has the following functions. That is,
- Injection function function that can inject holes from the anode or hole injection layer when an electric field is applied, and can inject electrons from the cathode or electron injection layer
- Transport function Function to move injected charges (electrons and holes) by the force of electric field
- Luminescent function It has a function to provide a field for recombination of electrons and holes and connect it to light emission. However, there may be a difference between the ease of hole injection and the ease of electron injection, and the transport capability represented by the mobility of holes and electrons may be large or small. Preferable to move the charge.
- the light emitting layer As a method for forming the light emitting layer, for example, a known method such as an evaporation method, a spin coating method, or an LB method can be applied.
- the light emitting layer is particularly preferably a molecular deposited film.
- the molecular deposition film is a thin film formed by deposition from a material compound in a gas phase state or a film formed by solidification from a material compound in a solution state or a liquid phase state.
- a binder such as rosin and a material compound are dissolved in a solvent to form a solution, which is then thin-filmed by spin coating or the like.
- the light emitting layer can also be formed by twisting.
- a known light emitting material other than the light emitting material comprising the spiro atom-containing compound of the present invention may be contained in the light emitting layer as desired, as long as the object of the present invention is not impaired.
- a light-emitting layer containing another known light-emitting material may be laminated on a light-emitting layer containing a light-emitting material having the above compound power.
- 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 has an ionic energy with high hole mobility. Usually 5.5 eV or less.
- a material that transports holes to the light emitting layer with a lower electric field strength is preferred.
- an electric field with a hole mobility of 10 4 to 10 V / cm is applied, preferably be at least 10- 4 cm 2 ZV. seconds.
- a hole injection or transport layer may be formed by the compound of the present invention alone or may be used by mixing with other materials.
- the material for forming the hole injection / transport layer by mixing with the compound of the present invention is not particularly limited as long as it has the above-mentioned preferred properties.
- Any material that is conventionally used as a transport material or a known material that is used for a hole injection layer of an organic EL element can be selected and used.
- aromatic tertiary amines, hydrazone derivatives, strong rubazole derivatives, triazole derivatives, imidazole derivatives, polybutcarbcarbazole, polyethylene dioxythiophene'polysulfonic acid (PEDOT'PSS) and the like can be mentioned.
- specific examples include triazole derivatives (see US Pat. No.
- JP-A-2-204996 polysilanes
- aniline-based copolymers JP-A-2-282263
- JP-A-1- No. 211399 discloses a conductive polymer oligomer (particularly thiophene oligomer).
- Porphyrin compounds, aromatic tertiary amine compounds and styryl amine compounds (US Pat. No. 4, 127, 4 No. 12, JP-A-53-27033, 54-58445, ⁇ 154-149634, 54-64299, 55-79450, 55-144250, 56-119132, 61-295558, 61-98353, 63-295695, etc.), and aromatic tertiary amine compounds are particularly preferred.
- 5,061,569 are present in the molecule, for example, 4,4,1bis (N— (1-naphthyl) N-phenylamino) 4, 4, 4, 4 "-Tris (NBI), which is composed of three star-flame units connected in a starburst type as described in JP-A-4-308688.
- NBI 4,4,1bis (N— (1-naphthyl) N-phenylamino) 4, 4, 4, 4 "-Tris (NBI)
- NBI N-naphthyl N-phenylamino
- MTDATA trihenylamine
- 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 thin-filming 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 ⁇ to 5 / ⁇ .
- the hole injection / transport layer may be composed of one or more of the above-described materials that preferably contain the compound of the present invention in the hole transport zone, or the layer described above.
- the hole injection / transport layer may be a laminate of a hole injection / transport layer made of a different type of compound from the hole injection / transport layer.
- the organic semiconductor layer is a layer that assists hole injection or electron injection into the light emitting layer, and preferably has a conductivity of 10-1Q S / cm or more.
- the material for such an organic semiconductor layer include thiophene oligomers such as conductive oligomers such as arylamine oligomers disclosed in JP-A-8-193191, and arylamine dendrimers. A conductive dendrimer or the like can be used.
- the electron injection layer is a layer for assisting the injection of electrons into the light emitting layer, and the electron mobility is high, and the adhesion improving layer is particularly a part of the electron injection layer. This is a layer with good adhesion to the cathode.
- the material used for the electron injection layer 8-hydroxyquinoline, a metal complex of its derivative, a oxadiazole derivative is suitable. is there.
- metal complex of 8-hydroxyquinoline or a derivative thereof include metal chelate oxinoid compounds including chelates of oxine (generally 8-quinolinol or 8-hydroxyquinoline).
- metal chelate oxinoid compounds including chelates of oxine (generally 8-quinolinol or 8-hydroxyquinoline).
- oxine generally 8-quinolinol or 8-hydroxyquinoline.
- tris (8-quinolinolato) aluminum (Alq) can be used for the electron injection layer.
- Examples of the oxadiazole derivative include an electron transfer compound represented by the following general formula.
- Ar 1 , Ar 2 ′, Ar 3 ′, Ar 5 ′, Ar 6 ′, Ar 9 each represents a substituted or unsubstituted aryl group, which may be the same or different from each other
- Ar 4 ′, Ar 7 ′ and Ar 8 ′ are substituted or unsubstituted arylene groups, which may be the same or different from each other.
- the arylene group include a phenylene group, a naphthylene group, a biphenylene group, an anthrene group, a peryleneylene group, and a pyrenylene group.
- an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or Examples include cyan groups.
- This electron transfer compound is preferably a thin film-forming compound. Specific examples of this electron transfer property compound include the following.
- a preferred form of the organic EL device of the present invention is a device containing a reducing dopant in a region for transporting electrons or an interface region between the cathode and the organic layer.
- the reducing dopant is defined as a substance capable of reducing the electron transporting compound. Accordingly, various materials can be used as long as they have a certain reducibility, for example, alkali metals, alkaline earth metals, rare earth metals, alkali metal oxides, alkali metal halides, alkaline earth metals.
- At least one substance can be preferably used.
- preferable reducing dopants include Na (work function: 2.36 eV), K (work function: 2.28 eV), Rb (work function: 2.16 eV) and Cs (work function: 1).
- 95eV) Force is a group force At least one selected alkali metal or Ca (work function: 2.9eV) , Sr (work function: 2.0 to 2.5 eV) and Ba (work function: 2.52 eV) force group force at least one selected alkaline earth metal, with work function of 2.9 eV or less Those are particularly preferred.
- a more preferable 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 electric current by further providing an electron injection layer composed of an insulator or a semiconductor between the cathode and the organic layer, thereby improving the electron injection property. Can be improved.
- 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 halide powers is used. It is preferable to do this. If the electron injection layer is composed of such an alkali metal chalcogenide or the like, it is preferable in that the electron injection property can be further improved.
- preferred alkali metal chalcogenides include, for example, Li 0, K 0, Na S, Na Se and Na 2 O, and preferred alkaline earths
- metal chalcogenide examples include CaO, BaO, SrO, BeO, BaS, and CaSe.
- Preferred alkali metal halides include, for example, LiF, NaF, KF, LiCl, KC1, and NaCl.
- preferable alkaline earth metal halides include fluorides such as CaF, BaF, SrF, MgF, and BeF, and fluorine.
- Halides other than nitrides may be mentioned.
- Semiconductors include 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 alkali metal chalcogenides, alkaline earth metal chalcogenides, alkali metal halides, and alkaline earth metal halides described above.
- a cathode having a low work function (4 eV or less) metal, an alloy, an electrically conductive compound and a mixture thereof is used.
- electrode materials include sodium, sodium-potassium alloy, magnesium, lithium, magnesium'silver alloy, aluminum Z 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. In the case where light emission with a light emitting layer strength is also taken out with the cathode power, it is preferable that the transmittance of the cathode for light emission is greater than 10%.
- the sheet resistance as a cathode is preferably several hundred ⁇ or less.
- the film thickness is usually 1011111 to 1111, preferably 50 to 200.
- the organic EL device of the present invention since an electric field is applied to the ultrathin 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 the pair of electrodes.
- Examples of the material used for the insulating layer include acid aluminum, lithium fluoride, lithium oxide, fluorescesium, acid cesium, acid magnesium, calcium magnesium, acid calcium, calcium fluoride, Examples include aluminum nitride, titanium oxide, silicon oxide, germanium oxide, silicon nitride, boron nitride, molybdenum oxide, ruthenium oxide, and vanadium oxide. Moreover, you may use these mixtures and laminates.
- An organic EL device can be produced by forming an anode, a light-emitting layer, and a hole injection layer or an electron injection layer as required by the materials and methods exemplified above, and further forming a cathode.
- the organic EL device can be fabricated from the cathode to the anode in the reverse order.
- anode Z hole injection layer Z light emitting layer Z electron injection layer Z cathode sequentially An example of manufacturing an organic EL element having the provided configuration is described.
- a thin film made of an anode material is formed on a light-transmitting substrate by a method such as vapor deposition or sputtering so as to have a film thickness of 1 ⁇ m or less, preferably in the range of 10 to 200 nm.
- the hole injection layer can be formed by a method such as a vacuum deposition method, a spin coating method, a casting method, or an LB method as described above. It is preferable to form by vacuum deposition from the viewpoint that a homogeneous film can be obtained immediately and that pinholes are hardly generated.
- the deposition conditions vary depending on the compound used (material of the hole injection layer), the crystal structure and recombination structure of the target hole injection layer, etc.
- the formation of the light emitting layer in which the light emitting layer is provided on the hole injection layer is also performed by thinning the organic light emitting material by a method such as vacuum deposition, sputtering, spin coating, or casting using a desired organic light emitting material.
- a vacuum evaporation method it is preferable to form by a vacuum evaporation method from the viewpoint that a homogeneous film can be obtained and pinholes are not easily generated!
- the deposition conditions vary depending on the compound used, but can generally be selected from the same range of conditions as the hole injection layer.
- the electron injection layer when an electron injection layer is provided on the light emitting layer, it is preferable to form the electron injection layer by a vacuum vapor deposition method because it is necessary to obtain a homogeneous film, as with the hole injection layer and the light emitting layer.
- Deposition conditions can be selected from the same condition ranges as for the hole injection layer and the light emitting layer.
- the polycyclic aromatic compound of the present invention varies depending on which layer in the emission band or the hole transport band, but co-deposition with other materials is performed when the vacuum deposition method is used. be able to. When using the spin coating method, it can be contained by mixing with other materials.
- a cathode can be stacked to obtain an organic EL device.
- the cathode is composed of a metal force, and vapor deposition or sputtering can be used. However, vacuum vapor deposition is preferred in order to protect the underlying organic material layer from damage.
- the method for forming each layer of the organic EL device of the present invention is not particularly limited. Conventionally known methods such as vacuum deposition and spin coating can be used.
- the organic thin film layer containing the polycyclic aromatic compound represented by the general formula (1) used in the organic EL device of the present invention was dissolved in a vacuum deposition method, a molecular beam deposition method (MBE method) or a solvent. It can be formed by a known method using a coating method such as a solution dating method, spin coating method, casting method, bar coating method or roll coating method.
- the luminescent coating film-forming material of the present invention comprises an organic solvent solution containing the polycyclic aromatic compound.
- the light-emitting coating film forming material is, for example, an organic compound layer involved in light emission in an organic EL device, specifically a light emitting layer, a hole injection (transport) layer, an electron injection (transport) layer, etc. Is a material formed by forming a coating film.
- Organic EL device of the present invention when the device is produced by a coating method using the light-emitting coating film forming material of the present invention or other coating film forming material, the polycyclic ring of the present invention is used.
- Organic solvents used for the dissolution of aromatic compounds include halogenated carbons such as dichloromethane, dichloroethane, black mouth form, carbon tetrachloride, tetrachloro mouth ethane, trichloroethane, black mouth benzene, dichlorobenzene, and black mouth toluene.
- Hydrogen solvents such as dibutyl ether, tetrahydrofuran, dioxane, and sol, methanol, ethanol, noreno, butanol, pentanole, hexanol, cyclohexanol, methyl cholesolve, ethyl cholesolve, Alcohol solvents such as ethylene glycol, benzene, toluene, Cyclohexylene, Echirubenzen, hexane, octane, coal hydrocarbon solvents such as decane, acetic Echiru, acetic heptyl, ester solvents such as acetic acid Amiru can be mentioned up. Of these, halogen-based hydrocarbon solvents, hydrocarbon-based solvents, and ether-based solvents are preferable. These solvents may be used alone or in combination. The usable solvent is not limited to these.
- a dopant may be preliminarily dissolved in the solution of the light-emitting coating film forming material of the present invention if desired.
- the amine compound represented by the general formulas (9) and (10) can be used.
- other various additives may be dissolved.
- the thickness of each organic layer forming the organic thin film layer of the organic EL device of the present invention is not particularly limited. Generally, however, if the film thickness is too thin, defects such as pinholes are generated, or conversely, it is too thick. Usually, the range of a few nm to 1 ⁇ m is preferred because a high applied voltage is required and efficiency is reduced.
- Compound 1 was synthesized as follows.
- intermediate 4-1 (2. Og, 5.8 mmol), bis (pinacolatodiboron) (4.4 g, 17.4 mmol), palladium (II) chloride diphenylphosphite Nopheroseum.
- Methylene chloride complex (1: 1) (0.14 g, 0.2 mmol), potassium acetate (3.4 g, 35 mmol), dimethyl sulfoxide (40 mL) were added, and the mixture was stirred at 80 ° C for 9 hours. .
- Water (lOOmL) was added to the reaction solution to precipitate a solid, which was dried under reduced pressure. The solid was purified by silica gel column chromatography to obtain Intermediate 4-2 (yield 1.2 g, yield 47%).
- Compound 5 was synthesized as follows.
- intermediate (8-1) (3.33g, 6.5mmol), 4-pyrenylbenzeneboronic acid (2.30g, 7.15mmol), tetrakis (triphenylphosphine) palladium (0.15g, 0.13 mmol), ⁇ , ⁇ -dimethylformamide (20 mL), potassium carbonate (2.70 g, 19.5 mmol) in aqueous solution 10 mL, except that a 10 mL reaction solution was used. And compound 8 was synthesized. Yield: 3.70 g, yield: 80%.
- a glass substrate with a transparent electrode having a thickness of 25 mm X 75 mm X 1.1 mm 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 the cleaning is mounted on the substrate holder of the vacuum deposition apparatus, and first, a film with a thickness of 60 nm is formed so as to cover the transparent electrode on the surface where the transparent electrode line is formed.
- a biphenyl film (Hiichi NPD film) was formed. This film functions as a hole injection layer.
- the compound 1 having a thickness of 40 nm was deposited on the hole injection layer as a host material to form a film.
- This film functions as a light emitting layer.
- An Alq film having a thickness of lOnm was formed on this film. This functions as an electron injection layer.
- Li Li source: manufactured by SAES Getter Co., Ltd.
- Alq Li binary evaporated to form an Alq: Li film (film thickness lOnm) as an electron injection layer (cathode).
- metal A1 was deposited to form a metal cathode, and an organic EL device was fabricated.
- Example 1 an organic EL device was prepared in the same manner as in Example 1 except that Compound 2 to Compound 5 and Compound 7 were used instead of Compound 1 as shown in Table 1. And evaluated. The results are shown in Table 1.
- Example 1 instead of Compound 1, Comparative Compounds 1 and 2 were used as described in Table 1. Except for the above, an organic EL device was produced in the same manner and evaluated in the same manner as in Example 1. Table 1 shows the results. Me is a methyl group.
- Examples 1 to 6 using the compound of the present invention in the light emitting layer are comparative examples in which the luminous efficiency is higher than the compounds used in Comparative Examples 1 and 2 and the luminance half-life is also comparative. This is a significant improvement over the materials used in.
- Comparative Compound 2 used in Comparative Example 2 nonuniform light emission was observed in the organic EL device. This is because the molecular weight of Comparative Compound 2 is large. This is probably because the comparative compound 2 was formed while pyrolyzing.
- a glass substrate with a transparent electrode of 25 mm X 75 mm X 0.7 mm thick (Zomatic Co., Ltd.) was ultrasonically cleaned in isopropyl alcohol for 5 minutes, followed by UV ozone cleaning for 30 minutes. Mount the glass substrate with the transparent electrode after cleaning on the substrate holder of the vacuum evaporation system, and cover the transparent electrode on the surface where the transparent electrode is formed. Film).
- This CuPc film functions as a hole injection layer.
- An ⁇ -NPD film having a thickness of 30 nm was formed on this CuPc film. This a-NPD film functions as a hole transport layer.
- the compound 6 having a film thickness of 30 nm was deposited on the a-NPD film as a host material to form a light emitting layer.
- the following bis (2-phenylisoquinolinato) acetylethylacetoiridium (Ir (piq) (acac)) was added as a phosphorescent Ir metal complex dopant. Ir (piq) (acac) concentration in the light-emitting layer
- This film functions as a light emitting layer.
- p bipherolatobis (2-methyl-8quinolinolato) aluminum (BAlq film) having the following thickness lOnm was formed on this film.
- This BAlq film functions as a hole blocking layer.
- an Alq film having a thickness of 40 nm was formed on this film.
- This Alq film functions as an electron injection layer.
- LiF which is a halogenated metal, was deposited to a thickness of 0.2 nm, and then aluminum was deposited to a thickness of 150 nm.
- This AlZLiF acts as a cathode. In this way, an organic EL device was produced.
- red light emission with a luminance of lOOOOcd Zm 2 was obtained at a voltage of 8V.
- a glass substrate with a transparent electrode having a thickness of 25 mm X 75 mm X 1.1 mm was ultrasonically cleaned in isopropyl alcohol for 5 minutes, followed by UV ozone cleaning for 30 minutes.
- PEDOT polyethylenedioxythiophene
- PEDOT A light emitting layer was formed by spin coating. The thickness of the light emitting layer was 50 nm.
- Alq film having a thickness of 10 nm was formed on this film.
- This Alq film functions as an electron transport layer.
- Li Li source: manufactured by SAES Getter Co.
- Alq Alq
- a metal A1 was deposited on the Alq: Li film to form a metal cathode, thereby forming an organic EL device.
- a glass substrate with a transparent electrode having a thickness of 25 mm X 75 mm X 1.1 mm was ultrasonically cleaned in isopropyl alcohol for 5 minutes, followed by UV ozone cleaning for 30 minutes.
- PEDOT polyethylenedioxythiophene
- a film thickness of lOOnm was formed by spin coating to form a hole injection layer, and then a toluene solution of compound 1 produced in Synthesis Example 1 Using this, a film was formed on PEDOT by a spin coat method to form a light emitting layer. The thickness of the light emitting layer was 50 nm.
- a dopant represented by the following structural formula was previously dissolved so that 0.2 to 0.3% by mass of the light emitting layer was added.
- Alq film having a thickness of lOnm was formed on this film.
- This Alq film functions as an electron transport layer.
- Li Li source: manufactured by SAES Getter Co., Ltd.
- Alq Alq
- Metal A1 was vapor-deposited on the Alq: Li film to form a metal cathode and an organic EL device.
- a device was fabricated in the same manner as in Example 8 except that instead of Compound 8, the following Comparative Compound 3 was used.
- the organic EL device using the polycyclic aromatic compound of the present invention and the material for forming a luminescent coating film has a high luminous efficiency and a long lifetime. Therefore, it is extremely useful as an organic EL device with practical performance.
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP05753256A EP1762553A4 (en) | 2004-06-28 | 2005-06-23 | POLYCYCLIC AROMATIC COMPOSITION, MATERIAL FOR FORMING A LUMINESCENT COATING FILM AND ORGANIC ELECTROLUMINESCENT DEVICE USING THIS |
US11/629,656 US20070237982A1 (en) | 2004-06-28 | 2005-06-23 | Polycyclic Aromatic Compound, Material for Forming Luminescent Coating Film and Organic Electroluminescent Device Using Same |
JP2006528589A JPWO2006001333A1 (ja) | 2004-06-28 | 2005-06-23 | 多環芳香族系化合物、発光性塗膜形成用材料及びそれを用いた有機エレクトロルミネッセンス素子 |
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JP2004189367 | 2004-06-28 | ||
JP2004-189367 | 2004-06-28 |
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US (1) | US20070237982A1 (ja) |
EP (1) | EP1762553A4 (ja) |
JP (1) | JPWO2006001333A1 (ja) |
CN (1) | CN1976883A (ja) |
TW (1) | TW200609330A (ja) |
WO (1) | WO2006001333A1 (ja) |
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US9056870B2 (en) | 2008-06-05 | 2015-06-16 | Idemitsu Kosan Co., Ltd. | Material for organic electroluminescence device and organic electroluminescence device using the same |
US11069862B2 (en) | 2008-06-05 | 2021-07-20 | Idemitsu Kosan Co., Ltd. | Material for organic electroluminescence device and organic electroluminescence device using the same |
US9660203B2 (en) | 2008-06-05 | 2017-05-23 | Idemitsu Kosan Co., Ltd. | Material for organic electroluminescence device and organic electroluminescence device using the same |
US9847493B2 (en) | 2008-06-05 | 2017-12-19 | Idemitsu Kosan Co., Ltd. | Material for organic electroluminescence device and organic electroluminescence device using the same |
US10020454B2 (en) | 2008-06-05 | 2018-07-10 | Idemitsu Kosan Co., Ltd. | Material for organic electroluminescence device and organic electroluminescence device using the same |
US10026907B2 (en) | 2008-06-05 | 2018-07-17 | Idemitsu Kosan Co., Ltd. | Material for organic electroluminescence device and organic electroluminescence device using the same |
US8759818B2 (en) | 2009-02-27 | 2014-06-24 | E I Du Pont De Nemours And Company | Deuterated compounds for electronic applications |
US8890131B2 (en) | 2009-02-27 | 2014-11-18 | E I Du Pont De Nemours And Company | Deuterated compounds for electronic applications |
US8497495B2 (en) | 2009-04-03 | 2013-07-30 | E I Du Pont De Nemours And Company | Electroactive materials |
US8431245B2 (en) | 2009-09-29 | 2013-04-30 | E. I. Du Pont De Nemours And Company | Deuterated compounds for luminescent applications |
CN105742519A (zh) * | 2013-01-31 | 2016-07-06 | 王金海 | 一种电致发光器件 |
WO2021049654A1 (ja) * | 2019-09-13 | 2021-03-18 | 出光興産株式会社 | 有機エレクトロルミネッセンス素子及び電子機器 |
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EP1762553A8 (en) | 2007-05-09 |
CN1976883A (zh) | 2007-06-06 |
EP1762553A4 (en) | 2008-11-12 |
JPWO2006001333A1 (ja) | 2008-04-17 |
EP1762553A1 (en) | 2007-03-14 |
TW200609330A (en) | 2006-03-16 |
US20070237982A1 (en) | 2007-10-11 |
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