WO2006025124A1 - 金属錯体、発光性固体、有機el素子及び有機elディスプレイ - Google Patents
金属錯体、発光性固体、有機el素子及び有機elディスプレイ Download PDFInfo
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- WO2006025124A1 WO2006025124A1 PCT/JP2004/019533 JP2004019533W WO2006025124A1 WO 2006025124 A1 WO2006025124 A1 WO 2006025124A1 JP 2004019533 W JP2004019533 W JP 2004019533W WO 2006025124 A1 WO2006025124 A1 WO 2006025124A1
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- 150000004696 coordination complex Chemical class 0.000 title claims abstract description 105
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- 229910001515 alkali metal fluoride Inorganic materials 0.000 description 1
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- 229940027991 antiseptic and disinfectant quinoline derivative Drugs 0.000 description 1
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- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 239000011651 chromium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
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- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
- GBRBMTNGQBKBQE-UHFFFAOYSA-L copper;diiodide Chemical compound I[Cu]I GBRBMTNGQBKBQE-UHFFFAOYSA-L 0.000 description 1
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- YLQWCDOCJODRMT-UHFFFAOYSA-N fluoren-9-one Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3C2=C1 YLQWCDOCJODRMT-UHFFFAOYSA-N 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PVADDRMAFCOOPC-UHFFFAOYSA-N germanium monoxide Inorganic materials [Ge]=O PVADDRMAFCOOPC-UHFFFAOYSA-N 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical group 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical compound [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 description 1
- 125000001072 heteroaryl group Chemical group 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 150000007857 hydrazones Chemical class 0.000 description 1
- 229920006270 hydrocarbon resin Polymers 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- SJCKRGFTWFGHGZ-UHFFFAOYSA-N magnesium silver Chemical compound [Mg].[Ag] SJCKRGFTWFGHGZ-UHFFFAOYSA-N 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N nickel(II) oxide Inorganic materials [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- WCPAKWJPBJAGKN-UHFFFAOYSA-N oxadiazole Chemical compound C1=CON=N1 WCPAKWJPBJAGKN-UHFFFAOYSA-N 0.000 description 1
- 150000004880 oxines Chemical class 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 125000002080 perylenyl group Chemical class C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- 229920006287 phenoxy resin Polymers 0.000 description 1
- 239000013034 phenoxy resin Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 125000003386 piperidinyl group Chemical group 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 1
- 229920000548 poly(silane) polymer Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000128 polypyrrole Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- JEXVQSWXXUJEMA-UHFFFAOYSA-N pyrazol-3-one Chemical compound O=C1C=CN=N1 JEXVQSWXXUJEMA-UHFFFAOYSA-N 0.000 description 1
- DNXIASIHZYFFRO-UHFFFAOYSA-N pyrazoline Chemical compound C1CN=NC1 DNXIASIHZYFFRO-UHFFFAOYSA-N 0.000 description 1
- 150000003222 pyridines Chemical class 0.000 description 1
- 125000004076 pyridyl group Chemical group 0.000 description 1
- 229940083082 pyrimidine derivative acting on arteriolar smooth muscle Drugs 0.000 description 1
- 150000003230 pyrimidines Chemical class 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
- 150000003248 quinolines Chemical class 0.000 description 1
- 150000003252 quinoxalines Chemical class 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000010944 silver (metal) Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- MDUSUFIKBUMDTJ-UHFFFAOYSA-N sodium;1h-1,2,4-triazole Chemical group [Na].C=1N=CNN=1 MDUSUFIKBUMDTJ-UHFFFAOYSA-N 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical compound C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 1
- 235000021286 stilbenes Nutrition 0.000 description 1
- FVRNDBHWWSPNOM-UHFFFAOYSA-L strontium fluoride Chemical compound [F-].[F-].[Sr+2] FVRNDBHWWSPNOM-UHFFFAOYSA-L 0.000 description 1
- 229910001637 strontium fluoride Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
- C07F15/0006—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
- C07F15/0086—Platinum compounds
- C07F15/0093—Platinum compounds without a metal-carbon linkage
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
- C07F15/02—Iron compounds
-
- 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
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1018—Heterocyclic compounds
- C09K2211/1025—Heterocyclic compounds characterised by ligands
- C09K2211/1044—Heterocyclic compounds characterised by ligands containing two nitrogen atoms as heteroatoms
-
- 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
- C09K2211/1059—Heterocyclic compounds characterised by ligands containing three nitrogen atoms as heteroatoms
-
- 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
Definitions
- the present invention shows phosphorescence emission, and is suitable for use as a light emitting material or a color conversion material in organic EL elements, lighting devices, etc., a metal complex, a light emitting solid, and an organic using the metal complex or light emitting solid
- the present invention relates to an EL element and an organic EL display using the organic EL element.
- An organic EL element has a structure in which one or more thin organic layers are sandwiched between a negative electrode and a positive electrode, and holes from the positive electrode, electrons from the negative electrode, and the like to the organic layer.
- the recombination energy when the holes and the electrons are recombined in the organic material layer excites the light emission center of the light emitting material in the organic material layer, and the light emitting material is excited from the excited state. It is a light emitting element utilizing light emitted when deactivated to a state.
- the organic EL element has features such as self-luminance and high-speed response, good visibility, ultra-thin and lightweight, and excellent high-speed response and video display. It is expected to be applied to front panel displays.
- organic EL device is attracting attention as a large-area light-emitting device that can emit light at a low voltage of 10 V or less.
- the fluorescent light-emitting host material which is the main material, is highly fluorescent, and a small amount of a dye molecule is doped as a guest material. High! ⁇ Proposed to form a light-emitting layer that exhibits luminous efficiency! Speak (see Non-Patent Document 2).
- Non-Patent Document 3 Organic light emission is classified into fluorescence and phosphorescence depending on the nature of the excited state that causes light emission. Until now, general organic matter has to emit phosphorescence at room temperature. For this reason, fluorescent materials have been used in organic EL devices. From the EL emission mechanism, it is expected that the phosphorescence emission state is generated with a probability four times that of the fluorescence emission state.
- the application of heavy metal complexes that emit phosphorescence at room temperature to the luminescent material is considered to be an EL element. Recently, it has been attracting attention as a high-efficiency means. However, in the case of a phosphorescent material, there is a problem that the selection range of a material with a very small amount of a material that emits strong phosphorescence at room temperature is narrow.
- an organic EL device using a metal complex that emits phosphorescence at room temperature it consists of two coordination bonds of platinum element and nitrogen atom and one direct bond of platinum element and carbon atom.
- An example is a metal complex having an N "N" C type tridentate ligand (see Patent Document 1).
- this metal complex has the problem that the phosphorescence efficiency at room temperature is not sufficient, and the organic EL device using this metal complex has a low light emission efficiency.
- Non-Patent Document 1 C. W. Tang and S. A. VanSlyke, Applied Physics Letters vol.51, 913 (1987)
- Non-Patent Document 2 C. W. Tang, S. A. Van Slyke, and C. H. Chen, Journal of Applied Physics vol. 65, 3610 (1989)
- Non-Patent Document 3 M. A. Baldo, et al, Nature vol. 395, 151 (1998), M. A. Baldo, etal, Applied Physics Letters vol. 75, 4 (1999)
- Patent Document 1 JP 2002-363552 A
- An object of the present invention is to solve the conventional problems and achieve the following object.
- the present invention exhibits phosphorescence emission, and is suitable for a metal complex, a luminescent solid, or a metal complex or a luminescent solid that is suitable as a luminescent material or a color conversion material in an organic EL element or a lighting device.
- Organic EL element with excellent thermal and electrical stability and extremely long drive life, and using this organic EL element, it has high performance and long life, and the average drive current is constant regardless of the light emitting pixel.
- the present invention is suitable for a full color display having a good color balance without changing the light emitting area, and has a long driving life and an object is to provide an organic EL display.
- the metal complex of the present invention binds to a metal atom in a tridentate form via the three nitrogen atoms of the first nitrogen atom, the second nitrogen atom, and the third nitrogen atom. It has a tridentate ligand and a monodentate ligand bonded to the metal atom.
- Luminescence of organic matter is classified into fluorescence and phosphorescence depending on the nature of the excited state that produces luminescence.
- organic matter generally does not produce phosphorescence, so organic EL elements and lighting devices are used.
- fluorescent materials have been used as light emitting materials and color conversion materials.
- the EL emission mechanism is expected to generate a phosphorescent state with a probability four times that of the fluorescent state, application of a metal complex that generates phosphorescence at room temperature to the light-emitting material is expected. It is effective for high efficiency and has been attracting attention in recent years.
- the internal quantum efficiency of an EL device using a fluorescent material is 25% at maximum, theoretically as high as 100%. Luminous efficiency can be achieved.
- the metal complex exhibiting strong phosphorescence is suitable as a luminescent material in an organic EL device or the like.
- the emission color can be changed by changing it as appropriate.
- the luminescent solid of the present invention contains the metal complex of the present invention.
- the luminescent solid of the present invention containing the metal complex of the present invention has a very long driving life, excellent luminous efficiency, and the like, and can be suitably used for lighting devices, display devices, and the like.
- the organic EL device of the present invention includes an organic thin film layer between a positive electrode and a negative electrode, and the organic thin film layer contains the metal complex. Therefore, the organic EL element of the present invention containing the metal complex of the present invention has a very long driving life, excellent luminous efficiency, etc. It can be suitably used for a display device or the like.
- the organic EL display of the present invention uses the organic EL element of the present invention. For this reason, the organic EL display of the present invention using the organic EL element of the present invention has a very long driving life and excellent luminous efficiency.
- FIG. 1 is a schematic explanatory view showing an example of a layer structure in the organic EL element of the present invention.
- FIG. 2 is a schematic explanatory view showing one structural example of an organic EL display.
- FIG. 3 is a schematic explanatory view showing an example of the structure of an organic EL display.
- FIG. 4 is a schematic explanatory view showing an example of the structure of an organic EL display.
- Figure 5 shows a passive matrix organic EL display (passive matrix panel).
- FIG. 6 is a schematic explanatory diagram showing a circuit in the passive matrix type organic EL display (passive matrix panel) shown in FIG.
- FIG. 7 is a schematic explanatory view showing one structural example of an active matrix type organic EL display (active matrix panel).
- FIG. 8 is a schematic explanatory view showing a circuit in the active matrix type organic EL display (active matrix panel) shown in FIG.
- FIG. 9 is a schematic diagram for explaining the outline of the experiment for calculating the phosphorescence quantum yield.
- the metal complex of the present invention has a metal atom, a specific tridentate ligand that binds tridentally to the metal atom, and a specific monodentate ligand that binds monodentate to the metal atom. .
- the metal atom acts as a central metal in the metal complex, and the metal atom can be appropriately selected according to the purpose without any particular limitation.
- One metal atom is contained in one molecule of the metal complex, and each metal atom in two or more molecules of the metal complex may be one kind or two or more kinds.
- Pt is particularly preferable (in this case, the metal complex is a platinum complex)
- the tridentate ligand is a tridentate bond to the metal atom via three nitrogen atoms, a first nitrogen atom, a second nitrogen atom and a third nitrogen atom ( ⁇ type). ) Can be appropriately selected according to the purpose for which there is no particular limitation.
- Examples of the tridentate ligand include the second nitrogen atom located adjacent to and sandwiched between the first nitrogen atom and the third nitrogen atom with respect to the metal atom. It is preferable that the first nitrogen atom and the third nitrogen atom are bonded by a covalent bond, and the first nitrogen atom and the second nitrogen atom are bonded to the metal atom by a coordinate bond.
- a nitrogen atom adjacent to the first nitrogen atom in the ring structure containing the first nitrogen atom preferably three of the nitrogen atoms of the first nitrogen atom and the third nitrogen atom are each part of another ring structure
- An adjacent atom is bonded to one nitrogen adjacent atom adjacent to the second nitrogen atom in the ring structure including the second nitrogen atom, and the third structure in the ring structure including the third nitrogen atom.
- the nitrogen adjacent atom adjacent to the nitrogen atom is the second nitrogen atom.
- the one nitrogen adjacent atom and the other nitrogen adjacent atom that are bonded to the second nitrogen adjacent atom adjacent to the second nitrogen atom in the ring structure containing Particularly preferred are those in which both the first carbon adjacent atom and the second carbon adjacent atom are carbon atoms.
- the monodentate ligand is not particularly limited as long as it binds monodentately to the metal atom, and can be appropriately selected according to the purpose without any limitation.
- a ligand that binds to a metal atom via one atom selected from C atom, ⁇ atom, ⁇ atom, ⁇ atom, and S atom can give sublimation to the metal complex.
- a ligand capable of neutralizing the charge of the entire metal complex is preferable.
- metal complex of the present invention examples include a metal complex represented by the following general formula (1).
- M represents the metal atom described above.
- Arl, Ar2 and Ar3 each represent a ring structure, and those in which a 5-membered ring group, a 6-membered ring group, and a condensed ring group power thereof are also selected are preferable.
- Examples of the five-membered ring group include a pyrrole ring group and a derivative group thereof.
- Preferred examples of the six-membered ring group include a pyridine ring group, a piperidine ring group, and derivatives thereof.
- Preferred examples of the condensed ring group include a benzopyrrole ring group and derivatives thereof.
- Ar2 is more preferably at least one of the following structures.
- M represents the metal atom described above.
- Arl and Ar3 represent the ring structure described above.
- R may be the same or different and each represents a hydrogen atom or a substituent.
- the shift between Arl and Ar3 is a shift between a ring heteroaromatic group and a polycyclic heteroaromatic group. Specifically, the following structures are more preferable.
- Arl and Ar3 may be the same as or different from each other, but are preferably the same as each other.
- Rl, R2 and R3 each represent a hydrogen atom or a substituent which substitutes for Arl, Ar2 and Ar3, and may be the same as each other, or may be different or plural. Those adjacent to each other may be bonded to form a ring structure.
- Specific examples of Rl, R2 and R3 are preferably a halogen atom, a cyano group, an alkoxy group, an amino group, an alkyl group, an alkyl acetate group, a cycloalkyl group, an aryl group, an aryloxy group, and the like. These may be further substituted with a known substituent.
- L represents a monodentate ligand bonded to the metal atom M via an atom selected from C, N, 0, P and S, and a halogen atom.
- Specific examples of L preferably include a group having the following structure, a chlorine atom, a bromine atom, and the like.
- a hydrogen atom is substituted with an organic group or a halogen atom
- R represents a hydrogen atom, an alkyl group, or an aryl group
- R4 and R5 each represents a hydrogen atom, an alkyl group, an aryl group, an alkoxyl group, or an aryloxy group.
- the metal complex represented by the general formula (1) is electrically neutral and exhibits sublimation in a vacuum, not only a known coating method but also a thin film is formed. Further, it is advantageous in that a vacuum deposition method or the like can be suitably applied.
- the structure of the Ar2 having a pyridine ring structure is as follows.
- the structure of the Arl and the Ar3 which are also a pyridine ring structure is as follows.
- the strength is 70% or more, but preferably 80% or more, more preferably 90% or more.
- the PL quantum efficiency can be measured and calculated as follows, for example. That is, as shown in FIG. 5, excitation light (365 nm steady light) 100 having a light source power is irradiated obliquely onto a thin film sample 102 on a transparent substrate, and a spectral radiance meter (CS-1000) 104 manufactured by Minolta is used. from PL spectra were measured thin film using, by conversion, and calculates the PL photon number [P (sa mple)]. Simultaneously with the luminescence measurement, the sample force is collected and reflected by the mirror 106 through the transmitted and reflected excitation light. The total intensity D (sample)] is detected by the photodiode 108.
- excitation light (365 nm steady light) 100 having a light source power is irradiated obliquely onto a thin film sample 102 on a transparent substrate, and a spectral radiance meter (CS-1000) 104 manufactured by Mino
- the PL quantum yield of the sample thin film can be calculated by the following formula.
- the method for synthesizing the metal complex of the present invention can be appropriately selected according to the purpose without any particular limitation.
- the tridentate ligand (N'N ' (N type) hydrogen-substituted product and the metal halide or alkali salt thereof containing the above metal atom are reacted according to appropriately selected conditions, and if necessary, as shown in the following reaction formula 2, Preferred examples include a method of reacting this reaction product with a hydrogen or alkali metal substituent of the monodentate ligand.
- the above reaction can be suitably carried out even in the presence of a catalyst, and the catalyst can be appropriately selected depending on the purpose without any particular limitation.
- the catalyst can be appropriately selected depending on the purpose without any particular limitation. Examples thereof include a copper salt-organic amine catalyst. Preferably mentioned. These may be used alone or in combination of two or more.
- the metal complex of the present invention is excellent in PL quantum efficiency and exhibits high emission efficiency, and thus can be suitably used in various fields.
- the organic EL display a combination of red, green and blue organic EL elements is used as one pixel for the purpose of obtaining a full color display. In this case, three-color organic EL elements are required.
- the emission color can be adjusted or changed by appropriately changing the molecular structure of the tridentate ligand, and emission of red, green and blue colors can be obtained. It is advantageous to apply to the organic EL element and the organic EL display.
- the luminescent solid of the present invention contains the metal complex of the present invention and further includes other components appropriately selected according to the purpose.
- the other components can be appropriately selected depending on the purpose without any particular limitation.
- an organic material having a first excited triplet excitation energy higher than that of the metal complex is particularly preferable.
- Such an organic material functions as a host molecule in the luminescent solid using the metal complex as a guest molecule.
- the luminescent solid contains the organic material that functions as the host molecule
- the organic material as the host molecule is excited. Since the emission wavelength of the organic material as the host molecule and the absorption wavelength of the metal complex as the guest molecule overlap, the excitation energy efficiently transfers to the guest molecule.
- the host molecule returns to the ground state without emitting light, and only the guest molecule in the excited state emits excitation energy as light, so that it is excellent in luminous efficiency, color purity, and the like.
- the organic material that functions as the host molecule can be appropriately selected according to the purpose without any particular limitation.
- a material having an emission wavelength in the vicinity of the light absorption wavelength of the metal complex is preferable. More preferably, those having a first excited triplet excitation energy higher than that of the metal complex are more preferable.
- the metal complex has a small interaction with the metal complex when mixed with the metal complex. From the viewpoint of having a small influence on the original light emission characteristics, a force rubazole derivative represented by the following structural formula (2), which preferably has a force rubazole group, is more preferable.
- Ar represents a divalent or trivalent group containing an aromatic ring or a divalent or trivalent group containing a heterocyclic aromatic ring, as shown below.
- R represents a linking group, and examples thereof include the following.
- R 9 and R 1C> each independently represents a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an alkenyl group, an aryl group, a cyano group, an amino group, or an acyl group.
- n represents an integer, and 2 or 3 is preferable.
- the form of the luminescent solid can be appropriately selected depending on the purpose without particular limitation, and examples thereof include crystals, thin films, and the like.
- the content of the organic complex metal in the luminescent solid is not particularly limited, and can be appropriately selected according to the purpose. Usually, it is 0.1 to 50% by mass, and high-efficiency emission can be obtained. Therefore, 0.5 to 20% by mass is more preferable.
- the luminescent solid of the present invention exhibits high luminous efficiency, it can be suitably used in various fields. However, it is possible to obtain a desired luminescent color with high luminance and long life, and thus, an organic EL. It can be suitably used as a light-emitting material, a color conversion material, etc. in an element, lighting device, etc., and can be used particularly preferably in the organic EL element or organic EL display of the present invention described later.
- the organic EL device of the present invention has an organic thin film layer between a positive electrode and a negative electrode, the organic thin film layer contains the metal complex of the present invention or the luminescent solid, and is further appropriately selected. It has other layers or members.
- the organic thin film layer can be appropriately selected according to the purpose without any particular limitation.
- the organic thin film layer has at least a light emitting layer, and further, if necessary, a hole injection layer, a hole transport layer, a hole blocking.
- the light emitting layer may be formed as a light emitting layer with a single function, or may be formed with multiple functions such as a light emitting layer / electron transport layer, a light emitting layer / hole transport layer, etc. . [0071]
- One light emitting layer is formed as a light emitting layer with a single function, or may be formed with multiple functions such as a light emitting layer / electron transport layer, a light emitting layer / hole transport layer, etc. .
- the light emitting layer can be appropriately selected according to the purpose without any particular limitation.
- the light emitting layer preferably contains the metal complex of the present invention or the light emitting solid as a light emitting material.
- the metal complex When the metal complex is contained as a light emitting material, the light emitting layer may be formed by forming a film of the metal complex alone, or other materials other than the metal complex, for example, the present invention.
- the metal complex When the metal complex is a guest molecule (guest material), it may be formed including a host molecule (host material) having an emission wavelength in the vicinity of the light absorption wavelength of the guest molecule.
- the host molecule is preferably contained in the light emitting layer, but may be contained in a hole transport layer, an electron transport layer, or the like.
- the host molecule is first excited when EL emission occurs. Then, since the emission wavelength of the host molecule and the absorption wavelength of the guest molecule (the metal complex) overlap, the host molecular force efficiently transfers excitation energy to the guest molecule, and the host molecule emits light. Since only the guest molecule that has returned to the ground state without being excited and is in an excited state emits excitation energy as light, it is excellent in luminous efficiency, color purity, and the like.
- the host molecule can be appropriately selected according to the purpose for which there is no particular limitation, but those having an emission wavelength in the vicinity of the light absorption wavelength of the guest molecule are preferred. More preferable are those having a higher first excited triplet excitation energy, for example, an aromatic amine derivative represented by the following structural formula (1), a force rubazole derivative represented by the following structural formula (2), and the following structure:
- n an integer of 2 or 3.
- Ar represents a divalent or trivalent aromatic group or a heterocyclic aromatic group.
- R 7 and R 8 may be the same or different and each represents a monovalent aromatic group or a heterocyclic aromatic group.
- the monovalent aromatic group or heterocyclic aromatic group is not particularly limited and may be appropriately selected depending on the intended purpose.
- Ar represents a divalent or trivalent group containing an aromatic ring, or a divalent or trivalent group containing a heterocyclic aromatic ring, as shown below.
- R represents a linking group, and examples thereof include the following.
- CC CII R 9 and R 1C> each independently represent a hydrogen atom, a halogen atom,
- n represents an integer, and 2 or 3 is preferable.
- Ar force is an aromatic group in which two benzene rings are connected via a single bond
- R 9 and R 1C> are hydrogen atoms
- CBP rubazolyl
- main emission wavelength 380 nm
- R 11 represents a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an alkaryl group, an aryl group, a cyano group, an amino group, an acyl group, an alkoxycarbole group, Represents a carboxyl group, an alkoxy group, an alkylsulfonyl group, a hydroxyl group, an amide group, an aryloxy group, an aromatic hydrocarbon ring group, or an aromatic heterocyclic group, which may be further substituted with a substituent. .
- —R 15 may be the same as or different from each other, and represents a hydrogen atom or a substituent.
- Preferred examples of the substituent include an alkyl group, a cycloalkyl group, and an aryl group, and these may be further substituted with a substituent.
- R 12 — R 15 is a hydrogen atom, that is, represented by the following structural formula (4) 1.
- the host molecule that is the polymer material is not particularly limited, and can be appropriately selected according to the purpose.
- a polyparaphenylene resin represented by the following structural formula It is preferably selected from lene (PPV), polythiophene (PAT), polyparaphenylene (PPP), polybutylcarbazole (PVCz), polyfluorene (PF), polyacetylene (PA) and their derivatives.
- R represents a hydrogen atom, a halogen atom, an alkoxy group, an amino group, an alkyl group, a cycloalkyl group, an aryl group that may contain a nitrogen atom or a sulfur atom, or an aryloxy group. It may be substituted with a substituent.
- X represents an integer.
- PVCz polyvinyl carbazole represented by the following structural formula (8) is preferable in terms of efficient energy transfer from the host molecule to the guest molecule.
- R 17 and R 18 each represent a plurality of substituents attached to any position of the cyclic structure, and each independently represents a hydrogen atom, a halogen atom, an alkoxy group, an amino group.
- R 17 and R 18 may be bonded to each other at any adjacent substitution position to form an aromatic ring that may contain a nitrogen atom, a sulfur atom, or an oxygen atom. May be substituted.
- X represents an integer.
- the host molecule that is the polymer material When the host molecule that is the polymer material is used, the host molecule is dissolved in a solvent, and the metal complex of the present invention that is the guest molecule is mixed to prepare a coating solution, and then the coating is performed.
- the liquid can be applied by a wet film forming method such as a spin coating method, an ink jet method, a dip coating method, or a blade coating method.
- a hole transport layer material and an electron transport layer material can be simultaneously mixed in a solution on the layer to form a film.
- the metal complex-containing layer in the light-emitting layer can be appropriately selected depending on the purpose without any particular limitation, and is preferably 0.1 to 50% by mass, for example. More preferably, it is 5-2 0% by mass.
- the content is less than 0.1% by mass, the life and light emission efficiency may not be sufficient. When it exceeds 50% by mass, the color purity may be deteriorated. When it is, it is preferable at the point which is excellent in lifetime, luminous efficiency, etc.
- the ratio of the metal complex of the present invention, which is the guest material, to the host material (molar ratio, guest material: host material) in the light emitting layer is preferably 1:99 to 50:50. 1: 99-1 10:90 is more preferable.
- the content of the metal complex in these layers is the same as above. can do.
- the light emitting layer can inject positive holes from the positive electrode, the hole injection layer, the hole transport layer, and the like when an electric field is applied, and electrons can be injected from the negative electrode, the electron injection layer, the electron transport layer, and the like.
- the metal complex (luminescent material, luminescent molecule) that emits light by the recombination energy generated during the recombination is provided by providing a recombination field between the holes and the electrons.
- other light emitting materials may be contained within a range that does not impair the light emission.
- the light emitting layer can be formed according to a known method, for example, vapor deposition method, wet film forming method, MBE (molecular beam epitaxy) method, cluster ion beam method, molecular stacking method, LB method, printing method, transfer method. , And the like.
- the vapor deposition method is preferable in that it can be easily and efficiently produced at low cost without using a waste liquid treatment without using an organic solvent, but the light emitting layer is formed in a single layer structure.
- the light emitting layer is formed as a hole transporting layer / light emitting layer / electron transporting layer, a wet film forming method is also preferable.
- the vapor deposition method can be appropriately selected from publicly known methods depending on the purpose for which there is no particular limitation.
- Examples of the vapor deposition method include vacuum vapor deposition, resistance heating vapor deposition, chemical vapor deposition, and physical vapor deposition.
- Examples of the chemical vapor deposition method include a plasma CVD method, a laser CV D method, a thermal CVD method, and a gas source CVD method.
- the formation of the light-emitting layer by the vapor deposition method is performed by, for example, vacuum-depositing the metal complex, and when the light-emitting layer contains the host material in addition to the metal complex, the metal complex and the host material are added. It can be suitably performed by simultaneous vapor deposition by vacuum deposition.
- the wet film-forming method is a force that can be appropriately selected from known ones according to the purpose for which there is no particular limitation.
- inkjet method spin coating method, kneader coating method, bar coating method, blade coating Law, casting method, dipping method, curtain coating method, etc.
- a solution in which the material of the light emitting layer is dissolved or dispersed together with a resin component can be used (coating or the like).
- the resin component include polyvinyl carbazole. , Polycarbonate, polychlorinated butyl, polystyrene, polymethylmetatalylate, polyester, polysulfone, poly-phenoxide, polybutadiene, hydrocarbon resin, ketone resin, phenoxy resin, polyamide, ethyl cellulose, butyl acetate, ABS resin, Examples include polyurethane, melamine resin, unsaturated polyester resin, alkyd resin, epoxy resin, and silicone resin.
- the light emitting layer is formed by the wet film-forming method, for example, by using (coating and drying) a solution (coating liquid) in the solvent of the metal complex and the resin material used as necessary.
- a solution coating liquid
- the light emitting layer contains the host material in addition to the metal complex, the metal complex, the host material, and the resin material used as necessary are dissolved in a solvent (coating solution). (Applying and drying) can be suitably performed.
- the thickness of the light emitting layer can be appropriately selected according to the purpose for which there is no particular limitation. For example, 1 to 50 nm is preferable, and 3 to 20 nm is more preferable.
- the thickness of the light emitting layer is within the preferable numerical range, the light emission efficiency, light emission luminance, and color purity of light emitted from the organic EL element are sufficient, and when the thickness is within the more preferable numerical range, this is remarkable. It is advantageous in some respects.
- the positive electrode can be appropriately selected depending on the purpose for which there is no particular limitation. However, in the organic thin film layer, specifically, when the organic thin film layer has only the light emitting layer, the light emitting layer is used. In the case where the organic thin film layer further has the hole transport layer, a positive hole (in the hole transport layer, and in the case where the organic thin film layer further has the hole injection layer, a positive hole ( Those capable of supplying a carrier are preferred.
- the material for the positive electrode can be appropriately selected according to the purpose for which there is no particular limitation.
- examples include metals, alloys, metal oxides, electrically conductive compounds, and mixtures thereof.
- materials having a work function of 4 eV or more are preferred.
- the material of the positive electrode include conductive metal oxides such as tin oxide, zinc oxide, indium oxide, and indium tin oxide (ITO), metals such as gold, silver, chromium, and nickel, and these metals. And conductive metal oxide mixtures or laminates, inorganic conductive materials such as copper iodide and copper sulfide, organic conductive materials such as polyarine, polythiophene and polypyrrole, laminates of these with ITO, etc. Is mentioned. These may be used alone or in combination of two or more. Of these, ITO is particularly preferred from the viewpoints of productivity, high conductivity, transparency, etc. where conductive metal oxides are preferred.
- the thickness of the positive electrode can be appropriately selected depending on the material without particular limitation, but preferably 1 to 5000 mn force, more preferably 20 to 200 mn force ⁇ / ⁇ .
- the positive electrode is usually formed on a substrate such as soda lime glass or non-alkali glass, or transparent resin.
- the soda-lime glass provided with a non-alkali glass or a silica-like noa coat is preferred from the viewpoint of reducing the elution ions of the glass power.
- the thickness of the substrate is not particularly limited as long as it is sufficient to maintain mechanical strength. However, when glass is used as the base material, it is usually 0.2 mm or more, and 0.7 mm or more. preferable.
- the positive electrode includes, for example, a vapor deposition method, a wet film forming method, an electron beam method, a sputtering method, a reactive sputtering method, an MBE (molecular beam epitaxy) method, a cluster ion beam method, an ion plating method, a plasma weighting method.
- a vapor deposition method a wet film forming method, an electron beam method, a sputtering method, a reactive sputtering method, an MBE (molecular beam epitaxy) method, a cluster ion beam method, an ion plating method, a plasma weighting method.
- the above-mentioned methods such as a method of applying the ITO dispersion by a combination method (high frequency excitation ion plating method), molecular layer method, LB method, printing method, transfer method, chemical reaction method (sol-gel method, etc.) It can form more suitably.
- the positive electrode can be subjected to cleaning and other treatments to lower the driving voltage of the organic EL element and to increase the light emission efficiency.
- the other treatment for example, when the material of the positive electrode is ITO, UV-ozone treatment, plasma treatment and the like are preferable.
- the negative electrode is not particularly limited and may be appropriately selected depending on the purpose. However, in the organic thin film layer, specifically, when the organic thin film layer has only the light emitting layer, the light emitting layer When the organic thin film layer further has the electron transport layer, electrons are supplied to the electron transport layer. When the organic thin film layer has an electron injection layer between the organic thin film layer and the negative electrode, electrons are supplied to the electron injection layer. What can do is preferable.
- the material of the negative electrode can be appropriately selected according to the adhesion, ionic potential, stability, etc. of the negative electrode and adjacent layers or molecules such as the electron transport layer and the light emitting layer, which are not particularly limited. Examples thereof include metals, alloys, metal oxides, electrically conductive compounds, and mixtures thereof.
- the negative electrode material include alkali metals (eg, Li, Na, K, Cs, etc.), alkali earth metals (eg, Mg, Ca, etc.), gold, silver, lead, aluminum, sodium potassium. Alloys or mixed metals thereof, lithium aluminum alloys or mixed metals thereof, magnesium "I good alloys or mixed metals thereof, rare earth metals such as indium and ytterbium, and alloys thereof.
- alkali metals eg, Li, Na, K, Cs, etc.
- alkali earth metals eg, Mg, Ca, etc.
- gold silver, lead, aluminum, sodium potassium.
- Alloys or mixed metals thereof lithium aluminum alloys or mixed metals thereof, magnesium "I good alloys or mixed metals thereof, rare earth metals such as indium and ytterbium, and alloys thereof.
- aluminum, a lithium aluminum alloy or a mixed metal thereof, a magnesium silver alloy or a mixed metal thereof, which are preferable for a material having a work function of 4 eV or less are more preferable.
- the thickness of the negative electrode is not particularly limited, and can be appropriately selected according to the material of the negative electrode, etc. 1 1 10, OOOnm force S is preferable, 20-200nm is more preferable! .
- Examples of the negative electrode include vapor deposition, wet film formation, electron beam method, sputtering method, reactive sputtering method, MBE (molecular beam epitaxy) method, cluster ion beam method, ion plating method, plasma polymerization method (high frequency (Excited ion plating method), molecular stacking method, LB method, printing method, transfer method, etc.
- the two or more types of materials may be vapor-deposited at the same time to form an alloy electrode or the like, or an alloy electrode prepared in advance may be vapor-deposited. Etc. may be formed.
- the resistance value of the positive electrode and the negative electrode is preferably lower, preferably several hundred ⁇ or less.
- the hole injection layer is not particularly limited, and can be appropriately selected according to the purpose.
- the hole injection layer preferably has a function of injecting the positive force hole when an electric field is applied.
- the material for the hole injection layer is not particularly limited, and can be appropriately selected according to the purpose.
- Preferred examples include naphthylphenol-triphenylamine (hereinafter sometimes abbreviated as “2-TNATA”), copper phthalocyanine, polyarrin, and the like.
- the thickness of the hole injection layer is not particularly limited, and can be appropriately selected according to the purpose. For example, about 1 to 10 nm is preferable, and 5 to 50 nm is more preferable.
- the hole injection layer is formed by, for example, vapor deposition, wet film formation, electron beam method, sputtering method, reactive sputtering method, MBE (molecular beam epitaxy) method, cluster ion beam method, ion plating method, plasma polymerization method. It can be suitably formed by the above-described methods such as (high frequency excitation ion plating method), molecular lamination method, LB method, printing method, transfer method, and the like.
- Single hole transport layer
- the hole transport layer is a force that can be appropriately selected according to the purpose without any particular limitation.
- a layer having a function of transporting holes from the positive electrode when an electric field is applied is preferable.
- the material for the hole transport layer can be appropriately selected according to the purpose without any particular limitation, and examples thereof include aromatic amine compounds, carbazole, imidazole, triazole, oxazole, oxadiazole, polyarylalkane, pyrazoline, and pyrazolone.
- NPD N, N'—Diphenyl N, N, — Bis (3 methylphenol) [1, 1, Biphenyl] 4, 4, Diamine
- NPD N, N'-dinaphthyl N, N'-diphenyl [1, 1 'biphenyl] 4, 4, diamine
- the thickness of the hole transport layer is not particularly limited and may be appropriately selected depending on the intended purpose, but is usually 1 to 500 nm, and preferably 10-lOOnm.
- the hole transport layer may be, for example, a vapor deposition method, a wet film forming method, an electron beam method, a sputtering method, a reactive sputtering method, an MBE (molecular beam epitaxy) method, a cluster ion beam method, an ion plating method, a plasma polymerization method. It can be suitably formed by the above-described methods such as (high frequency excitation ion plating method), molecular lamination method, LB method, printing method, transfer method, and the like.
- the hole blocking layer is not particularly limited and can be appropriately selected according to the purpose.
- the hole blocking layer preferably has a function of blocking holes injected from the positive electrode.
- the material for the hole blocking layer can be appropriately selected according to the purpose without any particular limitation.
- the organic EL element has the hole blocking layer
- the holes transported from the positive electrode side are blocked by the hole blocking layer, and the electrons transported from the negative electrode are By passing through the blocking layer and reaching the light emitting layer, recombination of electrons and holes occurs efficiently in the light emitting layer. Therefore, the holes and electrons in the organic thin film layer other than the light emitting layer Thus, light emission from the target light emitting material can be efficiently obtained, which is advantageous in terms of color purity and the like.
- the hole blocking layer is disposed between the light emitting layer and the electron transport layer. Is preferred.
- the thickness of the hole blocking layer is not particularly limited and may be appropriately selected depending on the intended purpose.
- the thickness is usually about 1 to 500 nm, and preferably 10 to 50 nm.
- the hole blocking layer may have a single layer structure or a laminated structure.
- the hole blocking layer may be formed by, for example, a vapor deposition method, a wet film forming method, an electron beam method, a sputtering method, a reactive sputtering method, an MBE (molecular beam epitaxy) method, a cluster beam method, an ion plating method, a plasma polymerization method. It can be suitably formed by the above-described methods such as (high frequency excitation ion plating method), molecular lamination method, LB method, printing method, transfer method, and the like.
- Electron transport layer
- the electron transport layer is not particularly limited and can be appropriately selected according to the purpose.For example, it has a function of transporting electrons from the negative electrode and a function of blocking holes injected from the positive electrode. Have something, prefer something U ,.
- the material of the electron transport layer is not particularly limited and can be appropriately selected according to the purpose.
- quinoline derivatives such as the aluminum quinoline complex (Alq), oxadiazole derivatives, triazole derivatives, phenantorin derivatives
- Alq aluminum quinoline complex
- oxadiazole derivatives examples include perylene derivatives, pyridine derivatives, pyrimidine derivatives, quinoxaline derivatives, diphenylquinone derivatives, nitro-substituted fluorene derivatives, and the like.
- the hole transport layer material is also mixed to form a film.
- an electron transport layer / hole transport layer / light emitting layer can be formed, and in this case, a polymer such as polyvinyl carbazole or polycarbonate can be used.
- the thickness of the electron transport layer is not particularly limited and can be appropriately selected according to the purpose.
- the thickness is usually about 1 to 500 nm, and preferably 10 to 50 nm.
- the electron transport layer may have a single-layer structure or a stacked structure.
- the electron transporting material used for the electron transporting layer adjacent to the light emitting layer it is possible to use an electron transporting material having a light absorption edge shorter than that of the metal complex. It is limited to the light emitting layer and prevents unnecessary light emission from the electron transport layer. I like the power of the viewpoint.
- the electron transport material having a light absorption edge shorter than that of the metal complex include phenantorin derivatives, oxadiazole derivatives, and triazole derivatives, which are represented by the following structural formula (68).
- Preferred examples include —dimethyl-4,7-diphenyl-1,10-phenantine phosphorus (BCP), and the following compounds.
- the electron transport layer may be, for example, a vapor deposition method, a wet film forming method, an electron beam method, a sputtering method, a reactive sputtering method, an MBE (molecular beam epitaxy) method, a cluster ion beam method, an ion plating method, a plasma. It can be suitably formed by the above-described methods such as a polymerization method (high frequency excitation ion plating method), a molecular lamination method, an LB method, a printing method, and a transfer method.
- the material for the electron injection layer is not particularly limited and can be appropriately selected according to the purpose. Examples thereof include alkali metal fluorides such as lithium fluoride and alkaline earth metal fluorides such as strontium fluoride. It can be used suitably.
- the thickness of the electron injection layer is not particularly limited and can be appropriately selected according to the purpose. For example, it is usually about 0.1-lOnm, and preferably 0.5-2 nm.
- the electron injection layer is preferably formed by, for example, a vapor deposition method, an electron beam method, or a sputtering method. It can be formed appropriately.
- the organic EL device of the present invention may have other layers appropriately selected according to the purpose.
- the other layers include a color conversion layer and a protective layer.
- the color conversion layer preferably contains the metal complex of the present invention, which preferably contains a phosphorescent material.
- the color conversion layer may be formed only of the metal complex, or may be formed by including other materials. In the color conversion layer, the metal complexes may be used alone or in combination of two or more.
- an organic molecule excited by light of a certain wavelength emits light from the excited state and transitions to the ground state, either by intramolecular or by interaction with other molecules. Since part of the excitation energy is lost non-radiatively in the form of thermal energy, it is known that the wavelengths of excitation light and emission do not match. The energy difference between excitation light and luminescence is called a stochastic shift.
- the color conversion material that has been used for the color conversion layer so far, a fluorescent light emitting material in which only light emission from a singlet is observed due to a wide range of material selection, the fluorescent light emission material has been used.
- the material has a small stochastic shift ( ⁇ lOOnm), and light emission is observed immediately on the long wavelength side of the strongest absorption band in the visible range. For example, blue light is absorbed efficiently and red. Cannot convert to system color.
- the metal complex of the present invention is a phosphorescent material
- the metal complex of the present invention when it is excited by light of a certain wavelength and a singlet excited state is generated, it becomes a lower triplet excited state that is an energy state. Since the transition is rapid and phosphorescence can be emitted, the stochastic shift becomes larger compared to fluorescent materials (in the case of ordinary organic substances, the triplet state is 0.1-2 eV higher than the energy of the singlet excited state). Is known to be low).
- the color conversion layer using a phosphorescent material has a higher absorption rate of blue light than when a fluorescent material is used. The color conversion rate per molecule increases.
- the color conversion layer using the fluorescent light-emitting material does not absorb blue light, and thus more blue light is transmitted through the color conversion layer.
- the color conversion layer should be as thin as possible because the material that forms the organic EL element deteriorates due to exudates from it, such as moisture and organic solvent residues, and non-light-emitting areas occur. Better.
- concentration quenching is difficult to occur as compared with the fluorescent light emitting material, and the dispersion concentration is not limited.
- the phosphorescent light emitting material emits light even in a powder state.
- the dispersion concentration is too low, the light emission is weakened due to the quenching action of oxygen molecules.
- the effectiveness of using a phosphorescent light emitting material in a powder state is that the deterioration of the color conversion layer can be achieved.
- the color conversion layer Since the color conversion layer is always exposed to light in the photolithography process, ITO patterning process, and the process of color conversion as an element in the substrate manufacturing stage, the color conversion efficiency due to light deterioration is reduced. Decrease is a problem.
- a light emitting material dispersed in a color conversion layer When a light emitting material dispersed in a color conversion layer is used, the light emitting material alone is exposed to light, so that its deterioration is very fast and it is very difficult to prevent it.
- a color conversion layer using a phosphorescent material in powder form is exposed to light with a balta, so that it is possible to obtain a color conversion layer in which deterioration is suppressed, the lifetime is long, and conversion efficiency does not change. .
- the position where the color conversion layer is provided can be appropriately selected according to the purpose for which there is no particular limitation. For example, when performing full-color display, it is preferably provided on the pixel.
- the color conversion layer converts incident light into the light. It is more preferable that incident light that can be converted into light having a wavelength longer than lOOnm longer than the wavelength of the light can be converted into light having a wavelength longer than 150 nm longer than the wavelength of the light.
- the color conversion layer is preferably one capable of converting light in the wavelength region of ultraviolet light to blue light into red light.
- the method for forming the color conversion layer can be appropriately selected depending on the purpose without particular limitation, and examples thereof include a vapor deposition method and a coating method.
- a known color filter or the like may be used as the color conversion layer.
- the protective layer can be appropriately selected according to the purpose without any particular limitation.
- molecules or substances that promote deterioration of the organic EL element such as moisture and oxygen enter the organic EL element. Those that can be suppressed are preferable.
- Examples of the material of the protective layer include metals such as In, Sn, Pb, Au, Cu, Ag, Al, Ti, and Ni, MgO, SiO, SiO, AlO, GeO, NiO, CaO, and BaO. , Fe O, YO, TiO
- Metal oxides such as 2 2 3 2 3 2 3 2, nitrides such as SiN and SiN O, metals such as MgF, LiF, A1F, and CaF xy 2 3 2 fluoride, polyethylene, polypropylene, polymethylmetatalylate, Polyimide, polyurea
- Examples include water-absorbing substances of 1% or more, moisture-proof substances having a water absorption rate of 0.1% or less, and the like.
- the protective layer may be, for example, a vapor deposition method, a wet film formation method, a sputtering method, a reactive sputtering method, an MBE (molecular beam epitaxy) method, a cluster ion beam method, an ion plating method, a plasma polymerization method (high frequency excitation ions). It can be suitably formed by the above-described methods such as a plating method), a printing method, and a transfer method.
- the layer structure in the organic EL device of the present invention can be appropriately selected according to the purpose without any particular limitation.
- the following (1) one (13) layer structure that is, (1) positive electrode Z hole Injection layer Z hole transport layer Z light emitting layer Z electron transport layer Z electron injection layer Z negative electrode, (2) positive electrode z hole injection layer Z hole transport layer Z light emitting layer Z electron transport layer Z negative electrode, (3) positive electrode Z Hole transport layer Z light emitting layer Z electron transport layer Z electron injection layer Z negative electrode, (4) positive electrode Z hole transport layer Z light emitting layer Z electron transport layer Z negative electrode, (5) positive electrode Z hole injection layer Z hole transport Layer Z light emitting layer / electron transport layer Z electron injection layer Z negative electrode, (6) positive electrode Z hole injection layer Z hole transport layer Z light emitting layer / electron transport layer Z negative electrode, (7) positive electrode Z hole transport layer Z light emission Layer / electron transport layer Z electron injection layer Z negative electrode, (8) positive electrode z hole transport layer Z light emitting layer / electron transport layer Z negative electrode, (9) positive electrode Z hole injection layer Z hole
- the organic EL element has the hole blocking layer
- the layer in which the hole blocking layer is disposed between the light emitting layer and the electron transport layer is mentioned suitably.
- FIG. 1 the embodiment of (4) positive electrode Z hole transport layer Z light emitting layer Z electron transport layer Z negative electrode is illustrated in FIG. 1, and the organic EL element 10 is made of glass.
- a positive electrode 14 (for example, an ITO electrode) formed on the substrate 12, a hole transport layer 16, a light emitting layer 18, an electron transport layer 20 and a negative electrode 22 (for example, an A1-Li electrode) are stacked in this order. It has a layer structure.
- the positive electrode 14 (for example, ITO electrode) and the negative electrode 22 (for example, A1-Li electrode) are connected to each other via a power source.
- An organic thin film layer 24 is formed by the hole transport layer 16, the light emitting layer 18, and the electron transport layer 20.
- AZm 2 In continuous driving of AZm 2 , 5 hours or more is preferable, 20 hours or more is more preferable, 40 hours or more is more preferable, and 60 hours or more is particularly preferable.
- the emission peak wavelength of the organic EL device can be appropriately selected from visible light sources without any particular limitation, and is preferably 400 to 650 nm, for example.
- the light emission color of the organic EL element is usually blue, green, and red.
- the light emission voltage of the organic EL element is desired to emit light at a voltage of 10 V or less. It is preferable to emit light below V. It is more preferable to emit light below 7 V.
- the current efficiency of the organic EL element at a current density of 5 AZm 2 , it is preferably 1 OcdZA or more, more preferably 30 cdZA or more, and even more preferably 40 cdZA or more.
- the organic EL element of the present invention includes, for example, a computer, a vehicle-mounted display, an outdoor display, a household device, a commercial device, a household appliance, a traffic-related display, a clock display, a calendar display, although it can be suitably used in various fields including luminescent screens, audio equipment, etc., it can be particularly suitably used for lighting devices and the following organic EL displays of the present invention.
- the organic EL display of the present invention can adopt a known configuration without particular limitation, except that the organic EL element of the present invention is used.
- the organic EL display may be a single color light emission, a multicolor light emission type, or a full color type! /.
- the organic EL display of the full color type for example, as described in "Monthly Display", September 2000, page 33-37, the three primary colors (blue (B), green (G), and red (R)) light emitting elements corresponding to the three-color emission method that arranges the organic EL elements on the substrate.
- a white method that divides the light into three primary colors through a color conversion method that converts blue light emitted by an organic EL element for blue light emission into red (R) and green (G) through a fluorescent dye layer. Since the organic EL device of the present invention to be used is for red light emission and the like, a three-color light emission method, a color conversion method, and the like can be suitably employed.
- the color conversion method can be particularly preferably employed.
- this organic EL display is used for blue light emission on an electrode 25 arranged corresponding to a pixel.
- An organic thin film layer 30 is provided on the surface, and a transparent electrode 20 is further provided thereon.
- a color conversion layer 60 for red is provided via a protective layer (planarization layer) 15.
- a laminate of the red color filter 65 and a laminate of the green color conversion layer 70 and the green color filter 80 is provided on these.
- the organic thin film layer 30 for blue light emission emits blue light. Part of this blue light emission passes through the transparent electrode 20, passes through the protective layer 15 and the glass substrate 10 as they are, and is emitted to the outside.
- the blue light emission is converted into red and green in these color conversion layers, respectively.
- the filter 65 and the green color filter 80 red light emission and green light emission are emitted, respectively, and pass through the glass substrate 10.
- the organic EL display can display in full color.
- FIG. 3 is a diagram illustrating an example of the structure of an organic EL display using a three-color light emission method
- FIG. 4 is a diagram illustrating an example of the structure of an organic EL display using a white method.
- the symbols in FIGS. 3 and 4 mean the same symbols as in FIG.
- the organic EL element of the present invention is used for red light emission (the organic EL of the present invention
- the organic EL element of the present invention may be used for all colors that may be used for light emission of other colors), and in addition, an organic EL element for green light emission and an organic EL for blue light emission An element is required.
- the organic EL element for blue light emission can be appropriately selected from known ones that are not particularly limited.
- the organic EL element for green light emission can be appropriately selected from known ones that are not particularly limited.
- the layer constitutional force ITO (positive electrode) Z, NPDZ, AlqZ A1-Li (negative electrode) A certain thing etc. are mentioned suitably.
- the mode of the organic EL display can be appropriately selected according to the purpose without any particular limitation. For example, "Nikkei Electronics", No. 765, March 13, 2000, 55-62. Preferred examples include a passive matrix panel and an active matrix panel as described on the page.
- the passive matrix panel has, for example, strip-like positive electrodes 14 (for example, ITO electrodes) arranged in parallel with each other on a glass substrate 12, as shown in FIG. It has a strip-shaped organic thin-film layer 24 for red light emission, an organic thin-film layer 26 for blue light emission, and an organic thin-film layer 28 for green light emission that are arranged in parallel with each other and in a direction substantially orthogonal to the positive electrode 14.
- the organic thin film layer 24 for light emission, the organic thin film layer 26 for blue light emission, and the organic thin film layer 28 for green light emission it has the negative electrode 22 of the same shape as these.
- a positive electrode line 30 composed of a plurality of positive electrodes 14 and a negative electrode line 32 composed of a plurality of negative electrodes 22 cross each other in a substantially perpendicular direction.
- a circuit is formed.
- Each organic thin film layer 24, 26 and 28 for red light emission, blue light emission and green light emission located at each intersection functions as a pixel, and there are a plurality of organic EL elements 34 corresponding to each pixel! / Speak.
- the scanning lines, the data lines, and the current supply lines are formed in a grid pattern on the glass substrate 12, and the scan forming the grid pattern is performed.
- a TFT circuit 40 connected to a line or the like and arranged on each grid, and can be driven by the TFT circuit 40, and has a positive electrode 14 (for example, an ITO electrode) arranged in each grid.
- the organic thin film layer for red light emission 24, the organic thin film layer for blue light emission 26, and the organic thin film layer 28 for green red light emission arranged in parallel with each other, On the layer 24, the blue light emitting organic thin film layer 26, and the green light emitting organic thin film layer 28, the negative electrode 22 is disposed so as to cover them all.
- Organic thin film layer 24 for red light emission, Organic thin film layer 26 for blue light emission, and Organic thin film layer 2 for green light emission 2 8 has a hole transport layer 16, a light emitting layer 18, and an electron transport layer 20, respectively.
- the switching TFT 48 located at the intersection is driven, and accordingly the driving TFT 50 is driven.
- the organic EL element 52 at the position emits light. By controlling the light emission for each pixel, a full color image can be easily formed.
- the organic EL display of the present invention includes, for example, a television, a mobile phone, a computer, a vehicle-mounted display, an outdoor display, a household device, a commercial device, a household appliance, a traffic-related display, and a clock display.
- a display device a calendar display device, a luminescent screen, and an acoustic device.
- Pt (2, 6 bis (2 pyridyl) 4 (1H) pyridone chloride (hereinafter referred to as “Pt (dppdn) ClJ”) was synthesized as follows: Specifically, 2, 6 bis (2 pyridyl) ) 4 (1H) -pyridone (2.4 mmol, 838 mg) and K PtCl (2.6 mmol, l lOOmg) were degassed
- Pt (2, 6 bis (2 pyridyl) 4 (1H) pyridone-phenoxide (hereinafter referred to as “Pt (dppdn) oph”)) was synthesized as follows. Specifically, Pt (d ppdn) Cl (0.1 mmol, 48 mg) synthesized in Synthesis Example la was added to acetone and stirred. To this was added dropwise sodium phenoxide trihydrate (0.15 mmol, 26 mg) dissolved in 20 ml of methanol. And it stirred for 10 minutes at room temperature. Here, a few drops of pure water was added to allow the reaction to proceed. Then, since a pale yellow solid began to precipitate, the mixture was stirred for 3 hours while heating.
- Synthesis Example 3a Synthesis of Pt (2, 6bis (2pyridyl) 4 (1H) pyridone (1, 2, 4-triazole) (hereinafter referred to as “Pt (dppdn) (taz)”) Pt (2, 6 bis (2 pyridyl) —4 (1 ⁇ ) —pyridone (1, 2, 4 triazole) (hereinafter referred to as “Pt (dppdn) (taz)”) was converted to sodium phenoxide 3 in Synthesis Example 2a.
- the compound was synthesized in the same manner as in Synthesis Example 2a except that the hydrate was replaced with 1, 2, 4 triazole sodium, and as a result, the pale yellow crystalline powder of the target product, Pt (dppdn) (taz), 43 mg The yield was 84%, and the reaction of this synthesis is as follows.
- the synthesis reaction is as follows.
- Pt (2,6 bis (2pyridyl) 4 (1H) pyridone 2-benzothiazole thiolate (hereinafter referred to as “Pt (dppdn) (sbtz)”) was synthesized as follows: Specifically, Pt (dppdn) Cl (0.1 mmol, 48 mg) synthesized in Synthesis Example la was added to acetone and stirred, and then 25 mg (0.15 mmol) of 2 mercaptobenzothiazole and dimethyl sulfoxide were added. (DMSO) was added with 30 ml, and the mixture was stirred at room temperature in a nitrogen atmosphere where NaOH powder (3 mmol) was added and refluxed for 5 hours.
- DMSO DMSO
- Pt (2, 6 bis (2 pyridyl) 4 (1H) pyridone phenol acetylide (hereinafter referred to as “Pt (dppd n) (acph)”) was synthesized as follows, namely synthesized in Synthesis Example la.
- Synthesis Example la was the same as Synthesis Example la except that 2,6bis (2pyridyl) 4 (1H) pyridone was changed to 2,5-di (2pyridyl) pyrrole. As a result, 316 mg of Pt (dpprl) Cl yellow powder, which was the object, was obtained. The yield was 35%.
- the reaction of this synthesis is as follows. [0183] [Chemical 58]
- Synthesis Example 2a the same procedure as in Synthesis Example 2a was performed, except that Pt (dppdn) CI synthesized in Synthesis Example la was changed to Pt (dpprl) Cl synthesized in Synthesis Example lb. As a result, 43 mg of yellow powder of Pt (dpprl) (oph), which was the target product, was obtained. The yield was 85%.
- Synthesis Example 4a was the same as Synthesis Example 4a except that Pt (dppdn) CI synthesized in Synthesis Example la was changed to Pt (dpprl) C1 synthesized in Synthesis Example lb. As a result, 23 mg of yellow powder of Pt (dpprl) (sbtz), which was the target product, was obtained. The yield was 40%.
- Synthesis Example 5b Synthesis of Pt (2,5-di (2pyridyl) pyrrole) (ferulacetide) (hereinafter referred to as “Pt (d pprl) (acph)”)
- Synthesis Example 5a the procedure was the same as Synthesis Example 5a, except that Pt (dppdn) CI synthesized in Synthesis Example la was changed to Pt (dpprl) C1 synthesized in Synthesis Example lb. As a result, 23 mg of yellow powder of Pt (dpprl) (acph) which was the target product was obtained. The yield was 45%.
- Synthesis Example lc Synthesis of Pt (2, 7-di (2pyridyl) benzopyrrole) chloride (hereinafter referred to as “Pt (dpbprl) C1”)
- Synthesis Example la was the same as Synthesis Example la except that 2,6bis (2pyridyl) 4 (1H) pyridone was changed to 2,7-di (2pyridyl) benzopyrrole.
- Pt (dpbprl) C1 Synthesis of Pt (2, 7-di (2pyridyl) benzopyrrole) chloride
- Synthesis Example 2a the same procedure as in Synthesis Example 2a was performed, except that Pt (dppdn) CI synthesized in Synthesis Example la was changed to Pt (dpbprl) Cl synthesized in Synthesis Example lc. As a result, 44 mg of yellow powder of Pt (dpbprl) (oph), which was the object, was obtained. The yield was 82%.
- Synthesis Example 3a the procedure was the same as Synthesis Example 3a, except that Pt (dppdn) CI synthesized in Synthesis Example la was changed to Pt (dpbprl) C1 synthesized in Synthesis Example lc. As a result, 36 mg of yellow powder of Pt (dpbprl) (taz), which was the target product, was obtained. The yield was 65%.
- Synthesis Example 4a the same procedure as in Synthesis Example 4a was performed, except that Pt (dppdn) CI synthesized in Synthesis Example la was changed to Pt (dpbprl) C1 synthesized in Synthesis Example lc. As a result, 45 mg of yellow powder of Pt (dpbprl) (sbtz), which was the target product, was obtained. The yield was 72%.
- Synthesis Example la was the same as Synthesis Example la except that 2,6bis (2pyridyl) 4 (1H) pyridone was changed to 2,7-di (2pyridyl) naphthovirol. As a result, 524 mg of yellowish brown powder of Pt (dpnprl) Cl as the target product was obtained. The yield was 38%.
- the synthesis reaction is as follows.
- Synthesis Example 2a the same procedure as in Synthesis Example 2a was performed, except that Pt (dppdn) CI synthesized in Synthesis Example la was changed to Pt (dpnprl) Cl synthesized in Synthesis Example Id. As a result, 46 mg of yellow powder of Pt (dpnprl) (oph), which was the object, was obtained. The yield was 76%.
- Synthesis Example 3a was the same as Synthesis Example 3a except that Pt (dppdn) CI synthesized in Synthesis Example la was changed to Pt (dpnprl) C1 synthesized in Synthesis Example Id. As a result, 43 mg of a yellow powder of Pt (dpnprl) (taz), the target product, was obtained. The yield was 68%.
- Synthesis Example 4a the same procedure as in Synthesis Example 4a was performed, except that Pt (dppdn) CI synthesized in Synthesis Example la was changed to Pt (dpnprl) C1 synthesized in Synthesis Example Id. As a result, the target Pt 32 mg of a yellow powder of (dpnprl) (sbtz) was obtained. The yield was 45%.
- Synthesis Example 5a except that Pt (dpbprl) CI synthesized in Synthesis Example la was changed to Pt (dpnprl) C1 synthesized in Synthesis Example lb, it was the same as Synthesis Example 5a. As a result, 24 mg of yellow powder of Pt (dpnprl) (acph) which was the target product was obtained. The yield was 37%.
- Synthesis Example le Synthesis of Pt (2, 7-di (2-pyridyl) 4 (1H) pyridone 4-methylimine) chloride (hereinafter referred to as “Pt (dppdn-im) Clj)” — Synthesis Example la 2,6 Bis (2pyridyl) 4 (1H) The same as Synthesis Example la except that pyridone was changed to 2,7-di (2pyridyl) 4 (1H) pyridone 4-methylimine. As a result, 578 mg of a Pt (dppdn-im) Cl yellow-brown powder was obtained, and the yield was 49%.
- Synthesis Example lh Synthesis of Pt (2, 6-bis (2-pyridyl) 4 (1H) pyridone) chloride (hereinafter referred to as “Pt (di qpdn) Cl”)-Synthesis Example In la, 2, 6 bis (2 The same procedure as in Synthesis Example la except that pyridyl) 4 (1H) -pyridone was changed to 2,6-bis (2-pyridyl) 4 (1H) pyridone. As a result, 378 mg of Pt (diqpdn) Cl brown powder, which was the target product, was obtained. The yield was 28%.
- the synthesis reaction is as follows. [0207] [Chemical 64]
- Synthesis Example la was the same as Synthesis Example la except that 2,6bis (2pyridyl) 4 (1H) -pyridone was changed to 2,6-bis (dibenzothiazolyl) 4 (1H) pyridone in Synthesis example la.
- 384 mg of Pt (dbtzpdn) Cl yellow powder as the target product was obtained.
- the yield was 35%.
- the synthesis reaction is as follows.
- a thin film (luminescent solid) doped with 2% CBP of Pt (dppdn) CI synthesized in Synthesis Example 1 on a quartz glass substrate was prepared by co-evaporation so that the thickness was 50 nm.
- the PL (photoluminescence) quantum yield of this thin film (luminescent solid) was measured using the aluminum quinoline complex (Alq3) thin film (PL quantum yield: 22%) with a known PL quantum yield as a reference. Asked.
- a 365 nm steady-state light is used as the excitation light, and the amount of transmitted and reflected excitation light is monitored with a photodiode (C2719, manufactured by Hamamatsu Photonics).
- the emission spectrum of the sample thin film was measured with CS-1000) manufactured by Minolta.
- the thin film sample on the transparent substrate was irradiated obliquely with excitation light (365 nm steady light) from the light source power.
- Spectroradiometer Minolta, CS- 1000
- PL photon number P (sa mple)].
- the total intensity [Ksample) of the excitation light transmitted and reflected from the sample was detected with a photodiode. Subsequently, the same measurement was performed on the reference Alq3 thin film, and the PL photon number [P (ref.)] Of the reference and the total intensity [I (reD)] of the transmitted and reflected excitation light were obtained. The total intensity [K substrate)] of the transmitted and reflected excitation light only through the transparent substrate was measured.
- the PL quantum yield of the sample thin film can be calculated by the following formula.
- a stacked organic EL device was fabricated. That is, a glass substrate with ITO electrode, water, acetone, and lavage with isopropyl alcohol, a vacuum vapor deposition apparatus (1 X 10- 4 Pa, the substrate temperature is room temperature) using, as a hole injection layer on the ITO 4, 4,,, 4, and 1 tri (2-naphthylphenol-amino) triphenylamine (2-TNATA) were formed to a thickness of 140 nm. Next, the TPD having a thickness of lOnm was formed as a positive hole transport layer on the hole injection layer.
- a Pt (dpt) (obp) was deposited at a deposition rate ratio and a light emitting layer doped with 2% of the CBP was formed to a thickness of 30 nm.
- the BCP was formed to a thickness of 20 nm as a hole blocking layer.
- the Alq was formed as an electron transport layer with a thickness of 20 nm.
- LiF was vapor-deposited on the electron transport layer to a thickness of 0.5 nm, and finally aluminum was vapor-deposited to a thickness of lOO nm and sealed in a nitrogen atmosphere.
- the EL characteristics were measured by applying voltage with ITO as the positive electrode and the aluminum electrode as the negative electrode.
- Table 2 shows the voltage, emission peak wavelength, and current efficiency when the current density is 5 AZm 2 .
- An organic EL device was produced under the same conditions as in Example 29 except that Pt (dppdn) Cl as the light emitting material was replaced with the metal complexes shown in Table 2.
- Pt (dppdn) Cl as the light emitting material was replaced with the metal complexes shown in Table 2.
- a voltage was applied to these organic EL elements using ITO as a positive electrode and an aluminum electrode as a negative electrode, and EL characteristics were measured. At a current density 5AZm 2, voltage, peak emission wavelength and the current efficiency are shown in Table 2.
- Example 39 Pt (dpbprl) Cl 6.4 552 35
- Example 40 Pt (dpbprl) (obp) 6.2 563 36
- Example 41 Pt (dpbprl) (taz) 6.4 555 36
- Example 42 Pt (dpbprl) (sbtz) 6.6 557 35
- Example 43 Pt (dpbprl) (acph) 6.4 558 34
- Example 44 Pt (dpnprl) Cl 6.1 613 16
- Example 45 Pt (dpnprl) (obp) 5.8 610 17
- Example 46 Pt (dpnprl) (taz) 5.9 610 17
- Example 47 Pt (dpnprl) (sbtz) 5.9 611 15
- Example 48 Pt (dpnprl) (acph) 5.9 614
- Example 49 6.6 509 39
- Example 50 Pt (dpdzl
- Example 1 the light-emitting material was synthesized from Pt (dppdn) C1 according to the following Comparative Synthesis Example 1.
- Pt (6-Fu-Lu 2, 2 biviridine) (furacetylide) (hereinafter referred to as “Pt (phbp)) (Acph) "), except that the change was made.
- the quantum yield of phosphorescence emission of the formed thin film (luminescent solid) was measured, and the results are shown in Table 3.
- Example 2 In Example 29, except that Pt (dppdn) Cl as the light-emitting material was changed to Pt (phbp) (acph) synthesized in Comparative Synthesis Example 1 below, an organic EL element was obtained in the same manner as in Example 29. A child was made. EL characteristics were measured by applying voltage with ITO as the positive electrode and aluminum as the negative electrode. At a current density 5AZm 2, voltage, peak emission wavelength and the current efficiency are shown in Table 4.
- the conventional problems can be solved, phosphorescence is emitted, and a metal complex or a luminescent solid suitable as a light-emitting material or a color conversion material in an organic EL element or a lighting device.
- a metal complex or a luminescent solid suitable as a light-emitting material or a color conversion material in an organic EL element or a lighting device.
- the organic EL device has excellent lifetime, luminous efficiency, thermal and electrical stability, and has a very long driving life, and the organic EL device has high performance. Long life, average drive current can be constant regardless of light emitting pixels, suitable for full color display with good color balance without changing light emitting area, etc. Can be provided.
- the metal complex or the luminescent solid of the present invention exhibits phosphorescence, and can be suitably used as a luminescent material, a color conversion material, or the like in an organic EL element or a lighting device. Since the organic EL device of the present invention uses the metal complex or the luminescent solid, the computer has an excellent lifetime, luminous efficiency, thermal and electrical stability, color conversion efficiency, etc., and a long driving lifetime. Suitable for various fields including in-vehicle displays, outdoor displays, household equipment, commercial equipment, home appliances, traffic-related displays, clock displays, calendar displays, luminescent screens, acoustic equipment, etc. And can be used particularly suitably for lighting devices and the following organic EL displays of the present invention.
- the organic EL display of the present invention uses the organic EL element, the organic EL display has high performance and long life, and includes a television, a mobile phone, a computer, an on-vehicle display, an outdoor display, a household device, a commercial device, and a home appliance. It can be suitably used in various fields including industrial equipment, traffic-related indicators, clock indicators, calendar indicators, luminescent screens, audio equipment and the like.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
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US11/661,381 US20070296329A1 (en) | 2004-08-31 | 2004-12-27 | Metal Complex, Luminescent Solid, Organic El Element and Organic El Display |
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JP2004253500A JP2006069936A (ja) | 2004-08-31 | 2004-08-31 | 金属錯体、発光性固体、有機el素子及び有機elディスプレイ |
JP2004-253500 | 2004-08-31 |
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Country Status (5)
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US (1) | US20070296329A1 (ja) |
JP (1) | JP2006069936A (ja) |
KR (1) | KR20070045361A (ja) |
CN (1) | CN101018796A (ja) |
WO (1) | WO2006025124A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2023121258A1 (en) * | 2021-12-22 | 2023-06-29 | Samsung Display Co., Ltd. | A ligand for complexes for use in optoelectronic devices |
Families Citing this family (7)
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WO2006100888A1 (ja) * | 2005-03-22 | 2006-09-28 | Konica Minolta Holdings, Inc. | 有機el素子用材料、有機el素子、表示装置及び照明装置 |
WO2010016990A1 (en) * | 2008-08-08 | 2010-02-11 | University Of North Texas | Organic light-emitting diodes from homoleptic square planar complexes |
JP2010182637A (ja) * | 2009-02-09 | 2010-08-19 | Fujifilm Corp | 有機電界発光素子の製造方法及び有機電界発光素子 |
DE102011001007A1 (de) | 2011-03-01 | 2012-09-06 | Sensient Imaging Technologies Gmbh | Neue Platin(II)komplexe als Triplett-Emitter für OLED Anwendungen |
DE102012108129A1 (de) | 2012-08-31 | 2014-03-06 | Sensient Imaging Technologies Gmbh | Neue Platin(II)komplexe als Triplett-Emitter für OLED Anwendungen |
US20170047532A1 (en) * | 2015-08-13 | 2017-02-16 | Samsung Electronics Co., Ltd. | Organometallic compound, organic light-emitting device including the organometallic compound, and diagnosis composition including the organometallic compound |
KR102645088B1 (ko) | 2016-02-11 | 2024-03-07 | 삼성전자주식회사 | 유기금속 화합물 및 이를 포함한 유기 발광 소자 및 진단용 조성물 |
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US6830828B2 (en) * | 1998-09-14 | 2004-12-14 | The Trustees Of Princeton University | Organometallic complexes as phosphorescent emitters in organic LEDs |
SG118110A1 (en) * | 2001-02-01 | 2006-01-27 | Semiconductor Energy Lab | Organic light emitting element and display device using the element |
JP3965319B2 (ja) * | 2001-03-08 | 2007-08-29 | ザ ユニヴァーシティ オブ ホンコン | 有機金属発光材料 |
-
2004
- 2004-08-31 JP JP2004253500A patent/JP2006069936A/ja active Pending
- 2004-12-27 US US11/661,381 patent/US20070296329A1/en not_active Abandoned
- 2004-12-27 WO PCT/JP2004/019533 patent/WO2006025124A1/ja active Application Filing
- 2004-12-27 KR KR1020077007321A patent/KR20070045361A/ko not_active Application Discontinuation
- 2004-12-27 CN CNA2004800438970A patent/CN101018796A/zh active Pending
Non-Patent Citations (4)
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SHI D. ET AL: "Three new platinium(II)-dipeptide complexes.", JOURNAL OF INORGANIC BIOCHEMISTRY., vol. 73, no. 3, 1999, pages 173 - 186, XP002989650 * |
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SUGIMOTO H. ET AL: "Preparation, spectroscopic properties, and dynamic behavior of a u-oxo dirhenium(III) complex (Re2(u-0)C12(tpa)2)(PF6)2(tpa=tris(2-pyridylmethyl)amine).", INORGANICA CHIMICA ACTA., vol. 337, 2002, pages 203 - 211, XP002989649 * |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023121258A1 (en) * | 2021-12-22 | 2023-06-29 | Samsung Display Co., Ltd. | A ligand for complexes for use in optoelectronic devices |
Also Published As
Publication number | Publication date |
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US20070296329A1 (en) | 2007-12-27 |
CN101018796A (zh) | 2007-08-15 |
JP2006069936A (ja) | 2006-03-16 |
KR20070045361A (ko) | 2007-05-02 |
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