WO2005097942A1 - 有機エレクトロルミネッセンス素子材料、有機エレクトロルミネッセンス素子、表示装置及び照明装置 - Google Patents
有機エレクトロルミネッセンス素子材料、有機エレクトロルミネッセンス素子、表示装置及び照明装置 Download PDFInfo
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- WO2005097942A1 WO2005097942A1 PCT/JP2005/004682 JP2005004682W WO2005097942A1 WO 2005097942 A1 WO2005097942 A1 WO 2005097942A1 JP 2005004682 W JP2005004682 W JP 2005004682W WO 2005097942 A1 WO2005097942 A1 WO 2005097942A1
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- organic electroluminescent
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- 229910052731 fluorine Inorganic materials 0.000 description 1
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- 125000002541 furyl group Chemical group 0.000 description 1
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- 229910001385 heavy metal Inorganic materials 0.000 description 1
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- 150000002484 inorganic compounds Chemical class 0.000 description 1
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- 150000002503 iridium Chemical class 0.000 description 1
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- 125000000040 m-tolyl group Chemical group [H]C1=C([H])C(*)=C([H])C(=C1[H])C([H])([H])[H] 0.000 description 1
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- AODWRBPUCXIRKB-UHFFFAOYSA-N naphthalene perylene Chemical group C1=CC=CC2=CC=CC=C21.C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 AODWRBPUCXIRKB-UHFFFAOYSA-N 0.000 description 1
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- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004115 pentoxy group Chemical group [*]OC([H])([H])C([H])([H])C([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
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- 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
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 125000005561 phenanthryl group Chemical group 0.000 description 1
- 125000000951 phenoxy group Chemical group [H]C1=C([H])C([H])=C(O*)C([H])=C1[H] 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 150000005359 phenylpyridines Chemical class 0.000 description 1
- 125000003356 phenylsulfanyl group Chemical group [*]SC1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
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- 229940081066 picolinic acid Drugs 0.000 description 1
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- 229920001230 polyarylate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
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- 229920000573 polyethylene Polymers 0.000 description 1
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- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
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- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- LVTJOONKWUXEFR-FZRMHRINSA-N protoneodioscin Natural products O(C[C@@H](CC[C@]1(O)[C@H](C)[C@@H]2[C@]3(C)[C@H]([C@H]4[C@@H]([C@]5(C)C(=CC4)C[C@@H](O[C@@H]4[C@H](O[C@H]6[C@@H](O)[C@@H](O)[C@@H](O)[C@H](C)O6)[C@@H](O)[C@H](O[C@H]6[C@@H](O)[C@@H](O)[C@@H](O)[C@H](C)O6)[C@H](CO)O4)CC5)CC3)C[C@@H]2O1)C)[C@H]1[C@H](O)[C@H](O)[C@H](O)[C@@H](CO)O1 LVTJOONKWUXEFR-FZRMHRINSA-N 0.000 description 1
- JEXVQSWXXUJEMA-UHFFFAOYSA-N pyrazol-3-one Chemical class O=C1C=CN=N1 JEXVQSWXXUJEMA-UHFFFAOYSA-N 0.000 description 1
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- 125000003226 pyrazolyl group Chemical group 0.000 description 1
- 125000002098 pyridazinyl group Chemical group 0.000 description 1
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- 125000000714 pyrimidinyl group Chemical group 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- WVIICGIFSIBFOG-UHFFFAOYSA-N pyrylium Chemical compound C1=CC=[O+]C=C1 WVIICGIFSIBFOG-UHFFFAOYSA-N 0.000 description 1
- DLJHXMRDIWMMGO-UHFFFAOYSA-N quinolin-8-ol;zinc Chemical compound [Zn].C1=CN=C2C(O)=CC=CC2=C1.C1=CN=C2C(O)=CC=CC2=C1 DLJHXMRDIWMMGO-UHFFFAOYSA-N 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 235000021286 stilbenes Nutrition 0.000 description 1
- 238000005556 structure-activity relationship Methods 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 125000004434 sulfur atom Chemical group 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 229940042055 systemic antimycotics triazole derivative Drugs 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000003831 tetrazolyl group Chemical group 0.000 description 1
- 150000004867 thiadiazoles Chemical class 0.000 description 1
- 125000000335 thiazolyl group Chemical group 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- 150000003577 thiophenes Chemical class 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- JFLKFZNIIQFQBS-FNCQTZNRSA-N trans,trans-1,4-Diphenyl-1,3-butadiene Chemical group C=1C=CC=CC=1\C=C\C=C\C1=CC=CC=C1 JFLKFZNIIQFQBS-FNCQTZNRSA-N 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 1
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 1
- 125000005259 triarylamine group Chemical group 0.000 description 1
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 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
- 125000006617 triphenylamine group Chemical group 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/30—Coordination compounds
- H10K85/341—Transition metal complexes, e.g. Ru(II)polypyridine complexes
- H10K85/346—Transition metal complexes, e.g. Ru(II)polypyridine complexes comprising platinum
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1018—Heterocyclic compounds
- C09K2211/1025—Heterocyclic compounds characterised by ligands
- C09K2211/1029—Heterocyclic compounds characterised by ligands containing one nitrogen atom as the heteroatom
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/18—Metal complexes
- C09K2211/185—Metal complexes of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2101/00—Properties of the organic materials covered by group H10K85/00
- H10K2101/10—Triplet emission
-
- 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
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/30—Coordination compounds
- H10K85/321—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3]
- H10K85/324—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3] comprising aluminium, e.g. Alq3
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/30—Coordination compounds
- H10K85/341—Transition metal complexes, e.g. Ru(II)polypyridine complexes
- H10K85/342—Transition metal complexes, e.g. Ru(II)polypyridine complexes comprising iridium
-
- 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
- H10K85/633—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
- H10K85/6572—Polycyclic condensed heteroaromatic hydrocarbons comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
Definitions
- Organic electroluminescent device organic electroluminescent device
- the present invention relates to a material for an organic electroluminescent device, a device for an organic electroluminescent device, a display device, and a lighting device.
- ELD electroluminescent display
- examples of ELD components include an inorganic electroluminescent device and an organic electroluminescent device (hereinafter, referred to as an organic EL device).
- Inorganic electroluminescent devices have been used as flat light sources, but high voltage AC is required to drive the light emitting devices.
- An organic EL device has a configuration in which a light-emitting layer containing a compound that emits light is sandwiched between a cathode and an anode. Electrons and holes are injected into the light-emitting layer and recombined to generate excitons (excitons).
- an element having an organic light-emitting layer obtained by using an 8-hydroxyquinoline aluminum complex as a host conjugate and adding a small amount of a phosphor thereto for example, JP-A-63-264692
- a device having an organic light emitting layer in which a quinoline aluminum complex is used as a host conjugate and doped with a quinacridone dye for example, JP-A-3-255190
- the upper limit of the internal quantum efficiency is 100%, so that the luminous efficiency is twice as high as that of the excited singlet, and performance almost equivalent to that of a cold cathode tube is not obtained. Because of the possibility that it may be used, it is attracting attention as a lighting application.
- Patent Documents 7-11 and Non-Patent Documents 1-4 Although it is known to be introduced (see, for example, Patent Documents 7-11 and Non-Patent Documents 1-4), these ligands achieve a blue emission by shortening the emission wavelength of the light-emitting material and achieve high efficiency. While the device of this type can be achieved, the light-emitting life of the device is significantly deteriorated, so that an improvement in the trade-off has been required.
- Patent Document 11 JP 2001-181616 A
- Patent Document 2 JP-A-2002-332291
- Patent Document 3 JP-A-2002-332292
- Patent Document 4 JP-A-2002-338588
- Patent Document 5 JP-A-2002-226495
- Patent Document 6 Japanese Patent Application Laid-Open No. 2002-234894
- Patent Document 7 International Publication No. 02Z15645 pamphlet
- Patent Document 8 Japanese Patent Application Laid-Open No. 2003-123982
- Patent Document 9 Japanese Patent Application Laid-Open No. 2002-117978
- Patent Document 10 Japanese Patent Application Laid-Open No. 2003-146996
- Patent Document 11 International Publication No.04Z016711 pamphlet
- Non-Patent Document 1 Inorganic Chemistry, Vol. 41, No. 12, pp. 3055-3066 (2002)
- Non-patent document 2 Applied Physics Letters, Vol. 79, page 2082 (2001)
- Non-patent document 3 Applied Physics Letters, Vol. 83, page 3818 (2003)
- Non-patent document 4 New Journal of Chemistry, 26 Vol., P. 1171 (2002) Disclosure of the Invention
- the present invention has been made in view of the above problems, and an object of the present invention is to control the emission wavelength by introducing a substituent into a specific position of phenylpyridine, which is a ligand of a platinum complex.
- An object of the present invention is to provide an organic EL device, a lighting device, and a display device which exhibit high luminous efficiency and have a long luminescent life by using a phosphorescent blue light emitting device material designed for a compound.
- the object of the present invention is to include a platinum complex in which a nitrogen-containing group is introduced into the 4-position of phenylpyridine, which is a ligand of the platinum complex, and a specific substituent is further introduced into a specific position. Achieved by the characteristic organic electroluminescent device material.
- FIG. 1 is a schematic diagram showing an example of a display device configured with an organic EL element.
- FIG. 2 is a schematic diagram of a display unit A.
- FIG. 3 is an equivalent circuit diagram of a drive circuit forming a pixel.
- FIG. 4 is a schematic view of a display device using a passive matrix system.
- FIG. 5 is a schematic diagram of a sealing structure of an organic EL element OLED1-1.
- FIG. 6 is a schematic view of a lighting device including an organic EL element.
- the best mode for carrying out the present invention has the following configuration. However, the present invention is not limited by these.
- An organic electroluminescent device material comprising a platinum complex having a partial structure represented by the following general formula (1).
- R, R, R, R, R, and R each represent a hydrogen atom or a substituent
- At least one of R, R, and R is an electron donating group.
- Ra and Rb each represent a substituent
- organic electroluminescent device material according to claim 1, wherein: More preferably, the organic electroluminescent compound according to the above item 1, wherein R and R are both the electron donating group.
- An organic electroluminescent device material comprising a platinum complex having a partial structure represented by the following general formula (2).
- R 1, R 2, R 3, R 4, R 5, R 6 and R each represent a hydrogen atom or a substituent.
- At least one of R, R, and R is an electron-withdrawing group.
- Rc and Rd represent a substituent.
- Electronoluminescence element material Electronoluminescence element material.
- An organic electroluminescent device comprising the organic electroluminescent device material according to the above (1) or (6).
- An organic electroluminescent device comprising a light-emitting layer as a constituent layer, wherein the light-emitting layer contains the organic electroluminescent device material according to item 1 or 6.
- An organic electroluminescent device having a hole blocking layer as a constituent layer, wherein the hole blocking layer contains the organic electroluminescent device material according to the above item 1 or 6. element.
- a display device comprising the organic electorophore luminescent element according to any one of (1) to (10) above.
- a lighting device comprising the organic electorophore luminescent element according to any one of (1) to (10) above.
- the organic electroluminescent device material of the present invention by adopting the constitution specified in any one of the above items, it is possible to have a specific electronic property at a specific position of ferbilidine.
- An organic EL device material which is a metal complex with a substituent introduced, was obtained.
- the organic EL element material By using the organic EL element material, it is possible to obtain an organic EL element having a high external extraction quantum efficiency and a long light emission lifetime. Further, by using the organic electorescence luminescent element, high luminance and high durability are exhibited. Further, the display device described in the above item and the lighting device described in the above item were obtained.
- the present inventors found that a specific portion of phenylpyridine used as a ligand during complex formation was used.
- the conventional metal complex for blue especially an electron-withdrawing group, emits light.
- the short emission lifetime which is a problem of an organic EL device manufactured using an organic EL device material whose wavelength is controlled to a shorter wavelength side, is greatly improved.
- the effective substitution positions for shortening the wavelength and increasing the wavelength were the 4th and 3p-6p positions.
- the shortening of the wavelength when the substituent is an electron donating group (in the present invention, ⁇ ⁇ represents a group of less than 0), it is effective to introduce a substituent into the 4-position, 4 ⁇ -position, and 6 ⁇ -position.
- the substituent is an electron-withdrawing group (in the present invention, ⁇ ⁇ represents a group exceeding 0)
- the Hammett's ⁇ ⁇ value according to the present invention refers to Hammett's substituent constant ⁇ ⁇ .
- the value of ⁇ ⁇ of Noh and Met is a substituent constant for which the electronic effect of the substituent on the hydrolysis of ethyl benzoate was determined by Hammett et al., “Structure-activity relationship of drugs” (Nan-Edo: 1979) And “SuDstituent Constants for Correlation Analysis and Hemistry and Biology” (C. Hansch and A. Leo, John Wiley & Sons, New York, 1979) and the like can be cited.
- the present inventors have conducted studies based on the above guidelines as a means for shortening the emission wavelength to blue, and have performed synthesis studies. As a result, control of the emission wavelength that substantially satisfies the simulation results I can do it. Further, based on this finding, various platinum complexes were synthesized and evaluated and evaluated as an organic EL device. As a result, when a substituted amino group was introduced at the 4-position, the following three kinds of findings were obtained.
- the two substituents at the 3p and 5p positions are electron-withdrawing, and most preferably have a ⁇ ⁇ of 0.
- Gaussian98 (Revision A. 11.4, MJ Frisch, GW Trucks, HB Schlegel, GE Scuseria, MA Robb, JR Chees eman, VG Zakrzewski, JA Montgomery, Jr., RE Stratmann, JC Burant, S. Dapprich, JM Millam, AD Daniels, KN Kudin, MC Strain, O. Farkas, J. Tomasi, V. Barone, M. Cossi, R. Cammi, B. Mennucci, C. Pomelli , C. Adamo, S. Clifford, J. Ochterski, GA Petersson, PY Ayala, Q. Cui, K.
- the phosphorescence wavelength was calculated using the TD-DFT calculation, and the emission wavelength was obtained.
- a layer containing a platinum complex having a partial structure represented by the above general formula (1) or (2) in a device a light emitting layer and a Z or hole blocking layer are preferable. When it is contained, by using it as a light emitting dopant in the light emitting layer, it was possible to achieve the effect according to the present invention, that is, a longer light emitting life of the organic EL element.
- an alkyl group for example, a methyl group, an ethyl group, a propyl group, an isopropyl group, (t
- At least one of the groups represented by R, R, R, and R is an electron donating group.
- the electron donating group It is an electron donating group, and it is preferable that at least one of the electron donating groups has a ⁇ ⁇ of 0.20 or less, and most preferably, the electron donating group is generally To be introduced into R or R of the formula (1), wherein R and R are both
- Electron donating group having ⁇ ⁇ of -0.20 or less >>
- examples of the electron donating group having a carbon number of 0.20 or less include a cyclopropyl group (0.21), a cyclohexyl group (-0.22), and a tert-butyl group (-0.20). ), —CH Si (CH) (-
- the substituents represented by Ra and Rb are the substituents represented by R 1, R 2, R 3, R 2, R 3 and R 4 in the general formula (1), respectively.
- R 1, R 2, R 3, R 4, R 5, R 6, and R 7 each represent a substituent represented by
- R and R are independently electron-withdrawing groups, and both R and R are
- 11 13 More preferably, it is an electron-withdrawing group, and more preferably, ⁇ ⁇ of the electron-withdrawing group is 0.10 or more.
- Electron-withdrawing group having ⁇ ⁇ of 0.10 or more >>
- ⁇ ⁇ force ⁇ examples of electron-withdrawing groups of 10 or more include, for example, ⁇ ( ⁇ ) (0.12),
- Rc and Rd are the substituents represented by R 1, R 2, R 3, R 2, R 3 and R 4 in the general formula (1), respectively.
- Rd is an alkyl group.
- the platinum complex according to the organic EL device material of the present invention is described in, for example, Organic Letters, vol3, No. 16, p2579-2581 (2001), Helvetica Chemica Acta, Vol. 69, p.1855 (1986;). Inorganic Chemistry, Vol. 41, No. 12, pp. 3055-3066 (2002), New Journal of Chemistry, Vol. 26, p. 1171 (2002), and references cited in these documents. It can be synthesized by applying the above method.
- the organic EL device When an organic EL device is produced using the organic EL device material of the present invention, it is preferable to use the organic EL device as a light emitting layer or a hole blocking layer among constituent layers of the organic EL device (details will be described later).
- the light emitting layer As described above, it is preferably used as a light emitting dopant.
- the mixing ratio of the light-emitting dopant to the light-emitting host, which is the main component in the light-emitting layer, is preferably adjusted to a range of 0.1% by mass to less than 30% by mass.
- the luminescent dopant can be mixed even if a plurality of types of compounds are used. May be phosphorescent dopants or fluorescent dopants having different structures, other metal complexes or other structures.
- the dopants phosphorescent dopants, fluorescent dopants, etc.
- the platinum complex used as the luminescent dopant will be described.
- Light-emitting dopants are broadly classified into two types: fluorescent dopants that emit fluorescence and phosphorescent dopants that emit phosphorescence.
- fluorescent dopant include coumarin dyes, pyran dyes, cyanine dyes, croconium dyes, squarium dyes, oxobenzanthracene dyes, fluorescein dyes, and rhodamines Dyes, pyrylium dyes, perylene dyes, styrven dyes, polythione dyes, and rare earth complex fluorescent materials.
- Representative examples of the latter are preferably complex compounds containing metals belonging to Groups 8, 9, and 10 of the periodic table of the elements, and more preferably iridium compounds, and Sumidium compounds are the most preferred, and iridium compounds are the most preferred.
- JP 2002-280178 JP 2001-181616, JP 2002-280179, JP 2001-181617, JP 2002-280180, JP 2001-247859 JP, JP 2002-299060 JP, JP 2001-313178 JP, JP 2002-302671 JP, JP 2001-345183 JP, JP 2002-324679 JP, WO 02/15645 pamphlet, JP-A-2002-332291, JP-A-2002-50484, JP-A-2002-332292, JP-A-2002-83684, JP-T-2002-540572, JP 2002-117978 JP, JP 2002-338588 JP, JP 2002-170684 JP, JP 2002-352960 JP, WO 01Z93642 pamphlet, JP 2002-50483 JP, JP 2002 — JP 100, JP 2002-173674, JP 2002-359 082, JP 2002-175884, JP
- a light-emitting host means a compound having the largest mixing ratio (mass) in a light-emitting layer composed of two or more compounds. Punt compound (simply referred to as dopant) ".
- the luminescent host used in the present invention a compound having a shorter wavelength than the phosphorescent 0-0 band of the luminescent dopant used in combination is preferable.
- the emission host preferably has a phosphorescent 0-0 band power of 50 nm or less.
- the luminescent host of the present invention is not particularly limited in structure, but is typically a carbazole derivative, a triarylamine derivative, an aromatic borane derivative, a nitrogen-containing heterocyclic compound, a thiophene derivative, A compound having a basic skeleton such as a furan derivative or an oligoarylene compound and having the 0-0 band of 450 nm or less is a preferable compound.
- the luminescent host of the present invention may be a low molecular compound, a high molecular compound having a repeating unit, or a low molecular compound having a polymerizable group such as a vinyl group or an epoxy group (a vapor-deposited polymerizable luminescent host). Good.
- the luminescent host a compound which has a hole transporting ability and an electron transporting ability, prevents a long wavelength emission, and has a high Tg (glass transition temperature) is preferable.
- the hosty conjugate includes a carboline derivative or a carboline derivative.
- the derivative is a derivative having a ring structure in which at least one of carbon atoms of a hydrocarbon ring constituting a carboline ring of a conductor is substituted with a nitrogen atom.
- the blocking layer for example, an electron blocking layer and a hole blocking layer
- the organic EL device material of the present invention is used for a hole blocking layer, an electron blocking layer, and the like. It is particularly preferable to use it for the hole blocking layer.
- the constitution of the present invention is described in any one of [1] and [2].
- the metal complex according to the present invention may be contained at 100% by mass as a layer component such as a hole blocking layer or an electron blocking layer, or may be contained in another organic compound (for example, the organic EL of the present invention). And other compounds used in the constituent layers of the device).
- the thickness of the blocking layer according to the present invention is preferably 3 nm to 100 nm, and more preferably 5 nm to 30 nm.
- the hole blocking layer has the function of an electron transporting layer in a broad sense, and has the ability to transport electrons and has a very small ability to transport holes, and thus blocks holes while transporting electrons. By doing so, the recombination probability of electrons and holes can be improved.
- hole blocking layer for example, JP-A Nos. 11-204258 and 11-204359, and “Organic EL Devices and Their Industrial Frontiers (November 30, 1998, published by NTS )) On page 237 etc. can be applied as the hole blocking layer according to the present invention.
- the configuration of the electron transport layer described later can be used as necessary as the hole blocking layer according to the present invention.
- Electron blocking layer >>
- an electron blocking layer has the function of a hole transporting layer in a broad sense, and has the ability to transport holes and has a very small ability to transport electrons. By blocking the electrons, the recombination probability of electrons and holes can be improved. Further, the configuration of the hole transport layer described later can be used as an electron blocking layer as needed.
- the organic EL device material of the present invention is preferably used for the adjacent layer adjacent to the light emitting layer, that is, the hole blocking layer and the electron blocking layer. It is preferably used for a blocking layer.
- the hole transport layer includes a material having a function of transporting holes.
- a hole injection layer and an electron blocking layer are also included in the hole transport layer.
- Single or multiple hole transport layers be able to.
- the hole transporting material is not particularly limited, and is conventionally used as a charge injecting and transporting material for holes in photoconductive materials, and is used for a hole injecting layer and a hole transporting layer of an EL element. Any one of known ones used can be selected and used.
- the hole transporting material has a hole injection / transportation and / or electron barrier property, and may be either an organic substance or an inorganic substance.
- triazole derivatives oxazidazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives and pyrazolone derivatives, furylenediamine derivatives, arylamine derivatives, amino-substituted chalcone derivatives, oxazole derivatives, styryl anthracene derivatives, fluorenone derivatives, hydrazone derivatives , Stilbene derivatives, silazane derivatives, aniline-based copolymers, and conductive polymer oligomers, particularly thiophene oligomers.
- the hole transporting material the above-mentioned materials can be used. It is preferable to use a porphyrin compound, an aromatic tertiary amine compound and a styrylamine compound, particularly an aromatic tertiary amine compound. ,.
- aromatic tertiary amidy conjugate and styryl amidi conjugate include N, N, N, N
- N, -tetraphenyl-4,4,1-diaminophenol N, N, -diphenyl-N, N, 1-bis (3-methylphenyl)-[1,1, -biphenyl] 4,4, diamine (TPD); 2,2 bis (4-zy P-tolylaminophenol) propane; 1,1-bis (4-di-p-tolylaminophenyl) cyclohexane; N, N, ⁇ ', ⁇ , -tetra- ⁇ - Tolyl 4,4, diaminobiphenyl; 1,1 bis (4 g ⁇ -tolylaminophenyl) 4-phenylcyclohexane; bis (4-dimethylamino-2-methylphenyl) phenyl methane; bis (4-g ⁇ , tolylaminophenyl) phenylmethane; ⁇ , ⁇ , diphenyl ⁇ ⁇ , ⁇ , di (4-methoxyphenyl) 4, 4'
- a polymer material in which these materials are introduced into a polymer chain, or in which these materials are used as a polymer main chain, can also be used.
- inorganic compounds such as p-type Si and p-type SiC can also be used as hole injection materials and hole transport materials.
- the hole transporting layer is formed by thinning the hole transporting material by a known method such as a vacuum evaporation method, a spin coating method, a casting method, an ink jet method, and an LB method. be able to.
- the thickness of the hole transport layer is not particularly limited, but is usually about 5 nm to 50 OO nm.
- the hole transport layer may have a single-layer structure composed of one or more of the above materials.
- Electron transport layer >>
- the electron transport layer is a material having a function of transporting electrons.
- an electron injection layer and a hole blocking layer are also included in the electron transport layer.
- the electron transporting layer may have a single layer or a plurality of layers.
- the electron transport material also serving as a hole blocking material used for the electron transport layer adjacent to the light emitting layer on the cathode side is as follows.
- the above materials are known.
- the electron transporting layer may be any material selected from conventionally known compounds as long as it has a function of transmitting electrons injected from the cathode to the light emitting layer. You can be there.
- electron transporting material examples include a heterocyclic ring such as a -substituted fluorene derivative, difluoroquinone derivative, thiopyrandioxide derivative, and naphthalene perylene.
- heterocyclic ring such as a -substituted fluorene derivative, difluoroquinone derivative, thiopyrandioxide derivative, and naphthalene perylene.
- examples include tetracarboxylic anhydride, carbodiimide, fluorenylidenemethane derivatives, anthraquinodimethane and anthrone derivatives, and oxaziazole derivatives.
- Thiadiazole derivatives in which the oxygen atom of the ring is substituted with a sulfur atom, and quinoxaline derivatives having a quinoxaline ring, which is known as an electron-withdrawing group, can also be used as an electron transport material.
- a polymer material in which these materials are introduced into a polymer chain, or in which these materials are used as a polymer main chain, can also be used.
- metal complexes of 8-quinolinol derivatives for example, tris (8-quinolinol) aluminum- (Alq), tris (5,7-dicromouth-8-quinolinol) aluminum, tris (5,7-jibumo — 8- (quinolinol) aluminum, tris (2-methyl-8-quinolinol) aluminum, tris (5-methyl-8-quinolinol) aluminum, bis (8-quinolinol) zinc (Znq), etc.
- Metal complexes replaced by Mg, Cu, Ca, Sn, Ga or Pb can also be used as electron transport materials.
- metal-free or metal phthalocyanine or those whose terminals are substituted with an alkyl group ⁇ sulfonic acid group or the like can be preferably used as the electron transporting material.
- the distyryl virazine derivative exemplified as a material for the light emitting layer can be used as an electron transporting material, and like the hole injection layer and the hole transporting layer, n-type Si, n-type SiC, etc.
- Inorganic semiconductors can also be used as electron transport materials.
- the electron transporting layer can be formed by thinning the electron transporting material by a known method such as a vacuum evaporation method, a spin coating method, a casting method, an inkjet method, and an LB method. it can.
- the thickness of the electron transport layer is not particularly limited, but is usually about 5 to 5000 nm.
- the electron transport layer may have a single-layer structure made of one or more of the above materials.
- Injection layer >>: electron injection layer, hole injection layer
- the injection layer is provided as needed, and has an electron injection layer and a hole injection layer. As described above, the injection layer exists between the anode and the light emitting layer or the hole transport layer, and between the cathode and the light emitting layer or the electron transport layer. May be present.
- the injection layer is provided between the electrode and the organic layer in order to lower the driving voltage and improve the emission luminance.
- electrode material in Vol. 2, Chapter 2 of “Organic EL Devices and Their Forefront of Industrial Technology (published by N.T. And a hole injection layer (one anode buffer layer) and an electron injection layer (one cathode buffer layer).
- the anode buffer layer (hole injection layer) is described in detail in JP-A-9-45479, JP-A-9-260062, JP-A-8-288069 and the like.
- Copper phthalate One layer of phthalocyanine buffer typified by cyanine, one layer of oxide buffer typified by vanadium oxide, one layer of amorphous carbon buffer, polymer buffer using conductive polymer such as polyaline (emeraldine) or polythiophene And one layer.
- one layer of the cathode buffer (electron injection layer) are also described in JP-A-6-325871, JP-A-9-17574, and JP-A-10-74586, and specifically, , One layer of metal buffer represented by strontium aluminum, one layer of alkali metal compound represented by lithium fluoride, one layer of alkaline earth metal compound represented by magnesium fluoride, and represented by aluminum oxide And one layer of a buffer for the oxidizing substance.
- the thickness of the buffer layer is preferably in the range of 0.1 nm to 100 nm, although it depends on the material desired.
- the injection layer can be formed by thin-filming the above-mentioned material by a known method such as a vacuum evaporation method, a spin coating method, a casting method, an ink jet method, and an LB method.
- the thickness of the injection layer is not particularly limited, but is usually about 5 to 5000 nm.
- the injection layer may have a single-layer structure in which one or more of the above-mentioned materials are used.
- anode for the organic EL device of the present invention a material having a large work function (4 eV or more), such as a metal, an alloy, an electrically conductive compound, and a mixture thereof is preferably used.
- a metal, an alloy, an electrically conductive compound, and a mixture thereof is preferably used.
- an electrode substance include metals such as Au, and conductive transparent materials such as Cul, indium tin oxide (ITO), SnO, and ZnO.
- ITO indium tin oxide
- SnO Tin Oxide
- ZnO ZnO
- IDIXO In O-
- a material capable of forming an amorphous transparent conductive film such as ZnO may be used.
- these electrode materials are formed into thin films by methods such as vapor deposition and sputtering, and a pattern of a desired shape can be formed by photolithography, or pattern accuracy is extremely low. If not (approximately 100 m or more), a pattern may be formed through a mask having a desired shape at the time of vapor deposition or sputtering of the electrode material.
- the transmittance be greater than 10%, and the sheet resistance of the anode is preferably several hundred ⁇ / square or less.
- the film thickness is selected in the range of usually 10 to 1000 nm, preferably 10 to 200 nm, depending on the material.
- a metal having a low work function (4 eV or less) (referred to as an electron injecting metal), an alloy, an electrically conductive compound, and a mixture thereof are used as an electrode material.
- an electrode material include sodium, sodium monolithium alloy, magnesium, lithium, a mixture of magnesium and copper, a mixture of magnesium and silver, a mixture of magnesium and aluminum, a mixture of indium magnesium and a mixture of aluminum and aluminum, and a mixture of aluminum and zinc oxide. (Al 2 O 3) mixture, indium, lithium
- Examples include a 23Z aluminum mixture, a rare earth metal, and the like.
- a mixture of an electron-injection metal and a second metal which is a stable metal having a large work function, such as a magnesium Z-silver mixture, Magnesium Z aluminum mixture, Magnesium Z indium mixture, Aluminum Z oxidized aluminum (Aio) mixture
- the cathode can be manufactured by forming a thin film of these electrode materials by a method such as evaporation or sputtering. Further, the sheet resistance as the cathode is preferably several hundreds of ohms or less, and the preferred film thickness is usually selected in the range of 10 nm to 1000 nm, preferably 50 nm to 200 nm. In order to transmit light, if one of the anode and the cathode of the organic EL element is transparent or translucent, it is convenient because the emission luminance is improved.
- Substrate also referred to as substrate, substrate, support, etc.
- the substrate for the organic EL device of the present invention is not particularly limited in the type of glass, plastic, etc., and is not particularly limited as long as it is transparent. And a light-transmitting resin film.
- Particularly preferred V is a resin film that can provide flexibility to the organic EL device.
- Examples of the resin film include polyethylene terephthalate (PET) and polyethylene naphth. Tallate (PEN), polyethersulfone (PES), polyetherimide, polyetheretherketone, polyphenylenesulfide, polyarylate, polyimide, polycarbonate (P
- TAC cellulose triacetate
- CAP cellulose acetate propionate
- the surface of ⁇ film, an inorganic or organic coating or High Priestess head coating Yogu water vapor permeability be formed 0. 01gZm 2 'day'atm following high Roh rear of both Preferably it is a film.
- the external emission efficiency of the organic electroluminescent device of the present invention at room temperature for light emission is preferably 1% or more, more preferably 2% or more.
- the quantum efficiency (%) extracted from the outside is the number of photons emitted to the outside of the organic EL element Z The number of electrons flowing to the organic EL element X 100.
- a hue improving filter such as a color filter may be used in combination.
- a film having a roughened surface (such as an anti-glare film) can be used in combination to reduce light emission unevenness.
- an anode / hole injection layer / hole transport layer As an example of the method for producing the organic EL device of the present invention, an anode / hole injection layer / hole transport layer
- a method for manufacturing an organic EL device comprising a Z light emitting layer, a Z hole blocking layer, an Z electron transport layer, a Z cathode buffer layer, and a Z cathode will be described.
- a desired electrode material for example, a thin film as a material for an anode is formed on a suitable substrate by a method such as vapor deposition or sputtering so as to have a thickness of 1 ⁇ m or less, preferably lOnm—200 nm.
- a thin film containing an organic compound such as a hole injection layer, a hole transport layer, a light emitting layer, a hole blocking layer, and an electron transport layer, which are element materials, is formed thereon.
- Examples of the method of forming a thin film containing the organic compound include a spin coating method, a casting method, an ink jet method, an evaporation method, a printing method and the like as described above. Vacuum evaporation method or spin coating method because pinholes are not easily generated Is particularly preferred. Further, a different film forming method may be applied to each layer. If you use the film adopts the deposition, the deposition conditions vary due to kinds of materials used, generally baud preparative heating temperature 50 ° C- 450 ° C, vacuum degree of 10- 6 Pa- 10- 2 It is desirable to appropriately select a pressure within the range of Pa, a deposition rate of 0. Olnm-50 ⁇ mZ seconds, a substrate temperature of 50 ° C-300 ° C, and a film thickness of 0.1 nm-5 ⁇ m.
- a thin film which is also a material for a cathode is formed thereon by a method such as vapor deposition or sputtering so as to have a thickness of 1 ⁇ m or less, preferably 5 Onm-200 nm.
- a desired organic EL device can be obtained by forming and providing a cathode. In the production of this organic EL device, it is preferable to produce from the hole injection layer to the cathode consistently by one evacuation, but it is not tough to take it out and apply a different film forming method. At that time, consideration must be given to performing the work in a dry inert gas atmosphere.
- the display device of the present invention will be described.
- the display device of the present invention may be monochromatic or multicolored.
- a multicolored display device will be described.
- a shadow mask is provided only when the light-emitting layer is formed, and a film can be formed on one surface by an evaporation method, a casting method, a spin coating method, an inkjet method, a printing method, or the like.
- the method is not particularly limited, but is preferably an evaporation method, an inkjet method, or a printing method.
- a pattern Jung using a shadow mask is preferable.
- the production order can be reversed, and the cathode, the electron transport layer, the hole blocking layer, the light emitting layer, the hole transport layer, and the anode can be produced in this order.
- the multicolor display device can be used as a display device, a display, and various light-emitting light sources. Wear. In display devices and displays, full-color display can be achieved by using three types of organic EL elements emitting blue, red, and green light.
- Examples of the display device and display include a television, a computer, a mopile device, an AV device, a character broadcast display, and information display in a car.
- the driving method may be either a simple matrix (passive matrix) method or an active matrix method.
- Light emitting sources include home lighting, car interior lighting, backlights for watches and LCDs, signboard advertisements, traffic lights, light sources for optical storage media, light sources for electrophotographic copiers, light sources for optical communication processors, and light sensors.
- a light source or the like may be mentioned, but the light source is not limited to this.
- the lighting device of the present invention will be described.
- the organic EL device of the present invention may be used as an organic EL device having a resonator structure.
- the organic EL device having such a resonator structure may be used as a light source for an optical storage medium, an electronic device, or the like.
- laser oscillation may be used for the above purpose.
- the organic EL device of the present invention may be used as a kind of lamp for illumination or an exposure light source, a projection device for projecting an image, a still image or a moving image, or the like. It may be used as a display device (display) of a type that can be directly viewed.
- the driving method may be either a simple matrix (passive matrix) method or an active matrix method.
- a full-color display device can be manufactured by using two or more kinds of the organic EL elements of the present invention having different emission colors.
- FIG. 1 is a schematic diagram illustrating an example of a display device including an organic EL element.
- the display of image information is performed by light emission of the organic EL element. It is a schematic diagram.
- the display 1 also includes a display unit A having a plurality of pixels and a control unit B that performs image scanning of the display unit A based on image information.
- the control unit B is electrically connected to the display unit A, sends a scan signal and an image data signal to each of the plurality of pixels based on image information from the outside, and controls the pixels for each scan line by the scan signal. , Sequentially emit light according to the image data signal, perform image scanning, and display image information on the display unit A.
- FIG. 2 is a schematic diagram of the display unit A.
- the display section A has a wiring section including a plurality of scanning lines 5 and data lines 6 and a plurality of pixels 3 and the like on a substrate.
- the main members of the display unit A will be described below.
- the figure shows a case where the light power emitted by the pixel 3 is extracted in the direction of the white arrow (downward).
- the scanning lines 5 and the plurality of data lines 6 of the wiring portion are each made of a conductive material, and the scanning lines 5 and the data lines 6 are orthogonal to each other in a grid and are connected to the pixels 3 at orthogonal positions ( Details are not shown).
- the pixel 3 When a scanning signal is applied from the scanning line 5, the pixel 3 receives an image data signal from the data line 6, and emits light according to the received image data.
- the pixel 3 By properly arranging pixels in the red, green, and blue light emission regions on the same substrate, full color display is possible.
- FIG. 3 is a schematic diagram of a pixel.
- the pixel includes an organic EL element 10, a switching transistor 11, a driving transistor 12, a capacitor 13, and the like.
- a full-color display can be performed by using red, green, and blue light emitting organic EL elements as the organic EL elements 10 for a plurality of pixels and juxtaposing them on the same substrate.
- the image data signal is also applied to the drain of the switching transistor 11 via the data line 6 in the control unit B. Then, when a scanning signal is applied to the gate of the switching transistor 11 via the control unit B scanning line 5, the switching transistor 11 The drive is turned on, and the image data signal applied to the drain is transmitted to the capacitor 13 and the gate of the drive transistor 12.
- the capacitor 13 is charged according to the potential of the image data signal, and the driving of the driving transistor 12 is turned on.
- the drive transistor 12 has a drain connected to the power supply line 7, a source connected to the electrode of the organic EL element 10, and an organic EL element connected from the power supply line 7 according to the potential of the image data signal applied to the gate. Element 10 is supplied with current.
- the driving of the switching transistor 11 is turned off. However, even if the driving of the switching transistor 11 is turned off, the capacitor 13 holds the potential of the charged image data signal, so that the driving of the driving transistor 12 is kept on and the next scanning signal is applied.
- the organic EL element 10 continues to emit light until the light is emitted.
- the driving transistor 12 is driven according to the potential of the next image data signal synchronized with the scanning signal, and the organic EL element 10 emits light.
- the organic EL element 10 emits light by providing a switching transistor 11 and a driving transistor 12 as active elements for the organic EL element 10 of each of the plurality of pixels, and The element 10 emits light.
- a light emitting method is called an active matrix method.
- the light emission of the organic EL element 10 may be light emission of a plurality of gradations by a multi-valued image data signal having a plurality of gradation potentials, or a predetermined light emission amount by a binary image data signal. No, it's a talent! /.
- the potential of the capacitor 13 may be maintained until the next scan signal is applied, or may be discharged immediately before the next scan signal is applied.
- the present invention is not limited to the active matrix method described above, but may be a passive matrix light emission drive in which the organic EL element emits light in accordance with a data signal only when a scanning signal is scanned.
- FIG. 4 is a schematic diagram of a display device using a noisy matrix method.
- a plurality of scanning lines 5 and a plurality of image data lines 6 are provided in a grid pattern facing each other with a pixel 3 interposed therebetween. ing.
- the pixels 3 connected to the applied scanning line 5 emit light according to the image data signal.
- the organic EL material according to the present invention can also be applied to an organic EL element that emits substantially white light as a lighting device.
- a plurality of light emitting colors are emitted simultaneously by a plurality of light emitting materials, and white light is obtained by mixing colors.
- white light is obtained by mixing colors.
- a combination of a plurality of emission colors a combination of three emission maximum wavelengths of the three primary colors of blue, green and blue may be used, or a combination of complementary colors such as blue and yellow, and blue-green and orange may be used. It may be one containing two emission maximum wavelengths.
- the combination of light-emitting materials for obtaining a plurality of light-emitting colors is a combination of a plurality of materials that emit light by phosphorescence or fluorescence; Any combination of a dye material that emits the above-mentioned light as excitation light may be used.
- a dye material that emits the above-mentioned light as excitation light
- a mask is provided only when forming a light emitting layer, a hole transport layer, an electron transport layer, or the like. Patterning such as a mask is not required because other layers are common because they are simply arranged by separately applying the mask.
- an electrode film can be formed on one surface by a vapor deposition method, a casting method, a spin coating method, an inkjet method, a printing method, or the like, and the productivity is also improved.
- the element itself emits white light, unlike a white organic EL device in which light-emitting elements of a plurality of colors are arranged in parallel in an array.
- the light emitting material used for the light emitting layer is not particularly limited.
- the platinum complex according to the present invention is adjusted so as to conform to a wavelength range corresponding to CF (color filter) characteristics. Also, it is only necessary to select and combine arbitrary materials from known light emitting materials to whiten them.
- the white light-emitting organic EL element of the present invention can be used as a display device, a display, a variety of light-emitting light sources and lighting devices, such as home lighting, vehicle interior lighting, and exposure light sources. It is usefully used as a lamp and also as a display device such as a backlight of a liquid crystal display device.
- a backlight such as a clock, a signboard advertisement, a traffic light, a light source for an optical storage medium, a light source for an electronic photocopier, a light source for an optical communication processor, a light source for an optical sensor, and a display device are required. And a wide range of applications such as general household electric appliances.
- the luminescent host material the luminescent dopant, and the materials used for forming the hole blocking layer and the like used in any one of Examples 16 are shown.
- the transparent support substrate on which the ITO transparent electrode was provided was superposed with iso-propyl alcohol. It was sonicated, dried with dry nitrogen gas, and subjected to UV ozone cleaning for 5 minutes.
- This transparent support substrate was fixed to a substrate holder of a commercially available vacuum evaporation apparatus, and five ⁇ -NPD, CBP, Ir-12, BCP and Alq
- lithium fluoride was placed in a tantalum resistance heating boat, and aluminum was placed in a tungsten resistance heating boat, and they were attached to a second vacuum tank of a vacuum evaporation apparatus.
- the heating boat containing CBP and the boat containing Ir 12 are independently passed through, and the deposition rate of CBP as a light emitting host and Ir to 12 as a light emitting dopant becomes 100: 7. This was adjusted to a thickness of 30 nm to provide a light emitting layer.
- the heating boat containing the BCP was energized and heated to provide a hole blocking layer having a deposition rate of 0.2 InmZ seconds to 0.2 nmZ seconds and a thickness of lOnm. Further, the heating containing Alq
- the boat was energized and heated, and a 40 nm-thick electron transport layer was provided at a deposition rate of 0.1-0.2 nmZ seconds.
- a cathode buffer steam Chakusokudo 0. OlnmZ seconds thickness 0. 5 nm in one 0. 02NmZ seconds by supplying an electric current to the boat lithium fluoride-containing One layer was provided, and then a boat containing aluminum was energized to apply a 150 nm-thick cathode at a deposition rate of 1 nmZ second to 12 nmZ second.
- the organic EL element was transferred to a glove box (a glove box replaced with a high-purity nitrogen gas having a purity of 99.999% or more) in a nitrogen atmosphere without being brought into contact with the atmosphere.
- OL ED1-1 was produced with the sealing structure replaced with.
- barium oxide 105 as a water trapping agent is obtained by sealing a high-purity barium oxide powder manufactured by Aldrich Co. with a fluororesin semi-permeable membrane (Microtex SN TF8031Q manufactured by Nitto Denko) with an adhesive. What was pasted on was prepared and used in advance. The sealing can was bonded to the organic EL element using an ultraviolet-curing adhesive 107, and the two were bonded by irradiating an ultraviolet lamp to produce a sealing element.
- 101 is transparent
- 102 is an organic EL layer composed of a hole injection Z transport layer, a light emitting layer, a hole blocking layer, an electron transport layer and the like
- 103 is a cathode.
- Organic EL elements OLED1-2-1-2-27 were prepared in the same manner as above, except that the emission dopant was changed as shown in Table 1 in the production of OLED1-1.
- OLED1-7 and OLED1-16 were fabricated in the same manner as OLED1-7 and OLED1-16, except that the light emitting host was changed from CPB to AZ1 in the fabrication of OLED1-7 and OLED1-16. .
- the obtained organic EL devices OLED1-1-1-27, 136, and 1-37 were lit at room temperature (about 23 ° C to 25 ° C) and under a constant current of 2.5 mAZcm 2.
- the emission luminance (L) [cdZm 2 ] immediately after the start of lighting the external extraction quantum efficiency (r?) was calculated.
- the emission luminance was measured using CS-1000 (manufactured by Minolta).
- the external extraction quantum efficiency was expressed as a relative value when the organic EL element OLED1-1 was set to 100.
- Organic EL devices OLED1-1-27, 136, and 1-37 are continuously lit at room temperature under a constant current of 2.5 mA Zcm 2 to achieve half the initial brightness. The time required for ( ⁇ 1Z2) was measured. In addition, the light emission lifetime was represented by a relative value when the organic EL element OLED1-1 was set to 100.
- ⁇ was obtained according to the following equation, and the CIE chromaticity was measured using CS-1000 (manufactured by Minolta).
- Organic EL elements OLED1-2-1-1-35 were produced in the same manner as in the above-mentioned production of organic EL elements OLED1-1 except that the emission dopant was changed as shown in Table 2.
- the organic EL device manufactured using a platinum complex having at least one electron donating group from 3 ⁇ to 6 ⁇ as the organic EL device material has higher luminous efficiency and light emission than the comparative device. It is clear that the life can be prolonged.
- the organic EL device was prepared in the same manner except that the luminescent dopant was changed from Ir12 to Ir1, and a hole blocking material was used as shown in Table 3. OLED2—1—2—25 was fabricated.
- the measurement of the quantum efficiency extracted from the outside and the emission lifetime were performed using the method described in Example 1.
- the values of the organic EL element OLED2-1 were set to 100 and expressed by relative values of each sample of the organic EL element. Table 3 shows the obtained results.
- the device of the present invention can achieve higher luminous efficiency and light emission lifetime than the comparative device.
- the emission colors of the organic EL devices of the present invention were all green.
- the organic EL element OLED 1-7 of Example 1 was used as a blue light emitting element.
- a green light-emitting device was prepared in the same manner as in OLED1-7, except that the emitting dopant was changed from 1 to Ir1 in the organic EL device OLED1-7 of Example 1. [0202] (Production of red light-emitting element)
- a red light-emitting device was produced in the same manner as in OLED1-7, except that the light-emitting dopant was changed from 1 to Ir9 in the organic EL device OLED1-7 of Example 1.
- a wiring portion including a plurality of scanning lines 5 and data lines 6 and a plurality of juxtaposed pixels 3 (pixels in a red region, pixels in a green region, pixels in a blue region, etc.)
- the scanning lines 5 and the plurality of data lines 6 of the wiring portion are each made of a conductive material, and the scanning lines 5 and the data lines 6 are orthogonal to each other in a grid and are connected to the pixels 3 at orthogonal positions. (Details not shown).
- the plurality of pixels 3 are driven by an active matrix method provided with an organic EL element corresponding to each emission color, a switching transistor as an active element, and a driving transistor, and a scanning signal is applied from a scanning line 5. Then, an image data signal is received from the data line 6 and light is emitted according to the received image data.
- a full-color display device was manufactured by juxtaposing the red, green, and blue pixels as appropriate.
- the electrode of the transparent electrode substrate of Example 1 was patterned into 20 mm ⁇ 20 mm, and ⁇ -NPD was formed thereon as a hole injection / transport layer with a thickness of 25 nm as in Example 1, and further,
- the heated boat containing CBP, the boat containing Compound 2 of the present invention, and the boat containing Ir 9 are independently energized to emit CBP as a light-emitting host and Compounds 2 and Ir to 9 of the present invention as light-emitting dopants.
- the deposition rate was adjusted to 100: 5: 0.6, and the deposition was performed to a thickness of 30 nm to provide a light emitting layer.
- BCP was formed by lOnm to form a hole blocking layer.
- Alq was deposited at 40nm.
- An electron transport layer was provided.
- Example 2 the same as the stainless steel transparent electrode was formed on the electron injection layer. A mask having a square hole with a shape was provided, and 0.5 nm of lithium fluoride was formed as a cathode buffer layer and 150 nm of aluminum was formed as a cathode by vapor deposition.
- FIG. 6 shows a schematic diagram of a flat lamp.
- Fig. 6 (a) shows a schematic plan view and
- Fig. 6 (b) shows a schematic cross-sectional view.
- a compound-designed phosphorescent blue light-emitting device material whose emission wavelength is controlled by introducing a substituent into a specific position of fluoropyridine, which is a ligand of a platinum complex, is used. Accordingly, it is possible to provide an organic EL element, a lighting device, and a display device that exhibit high luminous efficiency and have a long luminous life.
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Abstract
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EP1640365A1 (en) * | 2003-07-02 | 2006-03-29 | Idemitsu Kosan Co., Ltd. | Metal complex compound and organic electroluminescence device containing the same |
JP2006213686A (ja) * | 2005-02-07 | 2006-08-17 | Idemitsu Kosan Co Ltd | 金属錯体化合物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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DE102007046445A1 (de) | 2007-09-28 | 2009-04-16 | Osram Opto Semiconductors Gmbh | Organisches selbstemittierendes Bauteil |
WO2010007107A1 (de) | 2008-07-18 | 2010-01-21 | Siemens Aktiengesellschaft | Phosphoreszente metallkomplexverbindung, verfahren zur herstellung dazu und strahlungsemittierendes bauelement |
WO2011013685A1 (ja) * | 2009-07-29 | 2011-02-03 | 国立大学法人東京工業大学 | 金属錯体およびそれを用いた発光素子 |
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