WO2005092984A1 - 電荷輸送性ワニス及びそれを用いた有機エレクトロルミネッセンス素子 - Google Patents
電荷輸送性ワニス及びそれを用いた有機エレクトロルミネッセンス素子 Download PDFInfo
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- WO2005092984A1 WO2005092984A1 PCT/JP2005/005347 JP2005005347W WO2005092984A1 WO 2005092984 A1 WO2005092984 A1 WO 2005092984A1 JP 2005005347 W JP2005005347 W JP 2005005347W WO 2005092984 A1 WO2005092984 A1 WO 2005092984A1
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- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- WVIIMZNLDWSIRH-UHFFFAOYSA-N cyclohexylcyclohexane Chemical group C1CCCCC1C1CCCCC1 WVIIMZNLDWSIRH-UHFFFAOYSA-N 0.000 description 1
- WOSVXXBNNCUXMT-UHFFFAOYSA-N cyclopentane-1,2,3,4-tetracarboxylic acid Chemical compound OC(=O)C1CC(C(O)=O)C(C(O)=O)C1C(O)=O WOSVXXBNNCUXMT-UHFFFAOYSA-N 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- ZZTCPWRAHWXWCH-UHFFFAOYSA-N diphenylmethanediamine Chemical compound C=1C=CC=CC=1C(N)(N)C1=CC=CC=C1 ZZTCPWRAHWXWCH-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 description 1
- 229940116333 ethyl lactate Drugs 0.000 description 1
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- LNBHUCHAFZUEGJ-UHFFFAOYSA-N europium(3+) Chemical compound [Eu+3] LNBHUCHAFZUEGJ-UHFFFAOYSA-N 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 229940051250 hexylene glycol Drugs 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 230000009878 intermolecular interaction Effects 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- UEEXRMUCXBPYOV-UHFFFAOYSA-N iridium;2-phenylpyridine Chemical compound [Ir].C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1 UEEXRMUCXBPYOV-UHFFFAOYSA-N 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- XIXADJRWDQXREU-UHFFFAOYSA-M lithium acetate Chemical compound [Li+].CC([O-])=O XIXADJRWDQXREU-UHFFFAOYSA-M 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229940031993 lithium benzoate Drugs 0.000 description 1
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 1
- 229910001947 lithium oxide Inorganic materials 0.000 description 1
- LDJNSLOKTFFLSL-UHFFFAOYSA-M lithium;benzoate Chemical compound [Li+].[O-]C(=O)C1=CC=CC=C1 LDJNSLOKTFFLSL-UHFFFAOYSA-M 0.000 description 1
- BGTFRFFRQKBWLS-UHFFFAOYSA-M lithium;quinolin-2-olate Chemical compound [Li+].C1=CC=CC2=NC([O-])=CC=C21 BGTFRFFRQKBWLS-UHFFFAOYSA-M 0.000 description 1
- 229940018564 m-phenylenediamine Drugs 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000003935 n-pentoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- NTNWKDHZTDQSST-UHFFFAOYSA-N naphthalene-1,2-diamine Chemical compound C1=CC=CC2=C(N)C(N)=CC=C21 NTNWKDHZTDQSST-UHFFFAOYSA-N 0.000 description 1
- OLAPPGSPBNVTRF-UHFFFAOYSA-N naphthalene-1,4,5,8-tetracarboxylic acid Chemical compound C1=CC(C(O)=O)=C2C(C(=O)O)=CC=C(C(O)=O)C2=C1C(O)=O OLAPPGSPBNVTRF-UHFFFAOYSA-N 0.000 description 1
- DOBFTMLCEYUAQC-UHFFFAOYSA-N naphthalene-2,3,6,7-tetracarboxylic acid Chemical compound OC(=O)C1=C(C(O)=O)C=C2C=C(C(O)=O)C(C(=O)O)=CC2=C1 DOBFTMLCEYUAQC-UHFFFAOYSA-N 0.000 description 1
- 125000005484 neopentoxy group Chemical group 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229920001542 oligosaccharide Polymers 0.000 description 1
- 150000002482 oligosaccharides Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 125000004043 oxo group Chemical group O=* 0.000 description 1
- 125000001037 p-tolyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1*)C([H])([H])[H] 0.000 description 1
- RGSFGYAAUTVSQA-UHFFFAOYSA-N pentamethylene Natural products C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 1
- 125000003538 pentan-3-yl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])C([H])([H])[H] 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical group CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- 125000000951 phenoxy group Chemical group [H]C1=C([H])C([H])=C(O*)C([H])=C1[H] 0.000 description 1
- 125000004351 phenylcyclohexyl group Chemical group C1(=CC=CC=C1)C1(CCCCC1)* 0.000 description 1
- OBCUTHMOOONNBS-UHFFFAOYSA-N phosphorus pentafluoride Chemical compound FP(F)(F)(F)F OBCUTHMOOONNBS-UHFFFAOYSA-N 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 229920000172 poly(styrenesulfonic acid) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920002098 polyfluorene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229940005642 polystyrene sulfonic acid Drugs 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 125000001501 propionyl group Chemical group O=C([*])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- JREWFSHZWRKNBM-UHFFFAOYSA-N pyridine-2,3,4,5-tetracarboxylic acid Chemical compound OC(=O)C1=CN=C(C(O)=O)C(C(O)=O)=C1C(O)=O JREWFSHZWRKNBM-UHFFFAOYSA-N 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 125000003548 sec-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 150000003967 siloles Chemical class 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- 125000003774 valeryl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/02—Polyamines
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- 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
- 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
- H10K85/10—Organic polymers or oligomers
- H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
- H10K85/633—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
-
- 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
- C09K2211/14—Macromolecular compounds
- C09K2211/1408—Carbocyclic compounds
- C09K2211/1425—Non-condensed systems
-
- 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
- C09K2211/14—Macromolecular compounds
- C09K2211/1408—Carbocyclic compounds
- C09K2211/1433—Carbocyclic compounds bridged by heteroatoms, e.g. N, P, Si or B
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/10—Transparent electrodes, e.g. using graphene
- H10K2102/101—Transparent electrodes, e.g. using graphene comprising transparent conductive oxides [TCO]
- H10K2102/103—Transparent electrodes, e.g. using graphene comprising transparent conductive oxides [TCO] comprising indium oxides, e.g. ITO
-
- 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]
- H10K50/14—Carrier transporting layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/30—Coordination compounds
- H10K85/321—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3]
- H10K85/324—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3] comprising aluminium, e.g. Alq3
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/40—Organosilicon compounds, e.g. TIPS pentacene
Definitions
- the present invention relates to a charge transporting varnish and an organic electroluminescent device using the same.
- the present invention relates to a charge-transporting varnish, a charge-transporting thin film using the same, and an organic electroluminescence (hereinafter abbreviated as EL) element.
- EL organic electroluminescence
- Organic EL device since headings organic EL element exhibiting LOOOcdZm 2 about characteristics Tang Raka than 10V driving voltage of Eastman Kodak Company in 1987 (e.g., see Non-Patent Document 1), It is being actively studied.
- Organic EL devices are broadly classified into low-molecular organic EL (hereinafter abbreviated as OLED) and EL using a polymer light-emitting material (hereinafter abbreviated as PLED).
- OLED low-molecular organic EL
- PLED polymer light-emitting material
- a hole injection layer / a hole transport layer is used in order to improve the initial characteristics and extend the life of the device.
- CuPC (for example, refer to Non-Patent Document 2), which is a general hole injection material in OLEDs, is insoluble in various solvents, and thus needs to be formed by vacuum evaporation. For this reason, there is a drawback that the characteristics are greatly reduced due to the fact that a small amount is mixed into another organic layer in which the film is highly uneven, and it cannot be used as a hole transport layer of a PLED. In addition, it has been pointed out that CuPC has an absorption in the visible region and thus has an effect on the color tone of light emission of a device having low transparency.
- a polyarline-based material for example, see Non-Patent Literatures 3 and 4
- a polythione-based material for example, see Non-Patent Literature 5
- the varnish containing these materials has the disadvantage that the resulting thin film is brittle, has low mechanical strength, and is inferior in heat resistance.
- the removal of the solvent tends to form a powder which causes problems with the uniformity and flatness of the thin film. Further, the formation of the powder promotes the generation of dark spots and the deterioration of device characteristics due to the short circuit between the anode and the cathode, which causes a reduction in the yield during the production of the organic EL device.
- the charge transporting thin film is required to have high transparency in addition to the excellent charge transporting property for improving the luminous efficiency of the device.
- Non-Patent Document 1 Applied Physics Letters, USA, 1987, Vol. 51, p.913-915
- Non-Patent Document 2 Applied Physics Letters, U.S.A., 1996, Vol. 69, p.2160-2162
- Non-Patent Document 3 Nature, UK, 1992, Vol. 357, p.477-479
- Non-patent Document 4 Applied Physics Letters, USA, 19
- Non-Patent Document 5 Applied Physics Letters, USA, 19
- Patent Document 1 Japanese Patent Application Laid-Open No. 11-185962
- the present invention has been made in view of such circumstances, and is intended to form a thin film having extremely low defects, high uniformity and high flatness, and excellent mechanical strength, heat resistance, and transparency.
- a varnish capable of realizing excellent EL characteristics such as low driving voltage, high luminous efficiency, and long life when used for an organic EL device, and a charge transporting varnish using the varnish.
- An object is to provide a thin film and an organic EL device.
- a charge-transporting substance comprising a charge-transporting oligo-phosphorus having a predetermined number average molecular weight, Uniformity and flatness can be improved by using a charge-transporting varnish containing a charge-transporting organic material composed of a charge-transporting substance and a charge-accepting dopant substance, and at least one polymer selected from polyimide and a polyimide precursor.
- the inventors have found that it is possible to form a thin film having excellent mechanical strength, heat resistance and transparency, and have found that this thin film is suitable as a charge transporting thin film for an organic EL device. completed.
- the present invention provides the following [1]-[11] inventions.
- a charge-transporting material comprising a charge-transporting oligo-phosphorus having a number average molecular weight of 250 to 5000, or a charge-transporting organic material comprising the charge-transporting material and a charge-accepting dopant material, and a polyimide and a polyimide precursor.
- a charge-transporting varnish comprising at least one polymer, wherein the charge-transporting substance or the charge-transporting organic material, and the polymer are dissolved or dispersed in at least one solvent.
- R 2 and R each independently represent hydrogen, a monovalent hydrocarbon group or an organooxy group
- a and B each independently represent a divalent group represented by the general formula (2) or (3)
- R 4 — R 11 each independently represent hydrogen, a hydroxyl group, a monovalent hydrocarbon group, an organooxy group, an acyl group or a sulfone group, and m and n each independently represent 1 or more Arrangement The number satisfies m + n ⁇ 20. ) 0 ]
- R 12 — R 15 each independently represent hydrogen, fluorine, or a branched structure having 115 carbon atoms! /, Or may be an alkyl group or 115 carbon atoms. And an alkoxy group. ]
- Q is at least one kind of divalent organic group whose power is also selected from the general formulas (13) to (19),
- R 16 -R 32 each independently represent hydrogen, fluorine, or a branched structure having 115 carbon atoms, and may have an alkyl group or a branched structure having 115 carbon atoms.
- X represents a xy group, and each X may independently have a single bond, O—, —SC (0) NH—, —NH C (O) —, or a branched structure having 115 carbon atoms
- Y represents an alkylene group or an alkylene dioxo group which may have a branched structure having 115 carbon atoms, and Y represents a general formula (20);
- Ar 3 and Ar 4 are each independently a divalent benzene ring which may be substituted with W, a divalent naphthalene ring which may be substituted with W, or a divalent which may be substituted with W Represents a biphenyl group, substituted with W !, may!
- An optionally substituted phenyl group, a naphthyl group optionally substituted with W, a biphenyl group optionally substituted with W, a substituted phenyl group, a terphenyl group or W Represents a fluorene group; W represents fluorine, an alkyl group which may have a branched structure having 118 carbon atoms, or a branched structure having 118 carbon atoms. And i represents an integer of 1 or more and 4 or less.
- k represents a positive integer.
- Z is Formula (18) or (19) is a force selected that at least one divalent organic radical, u 1 and u 2 are , Each independently, one or more Indicates an integer and satisfies u / i W) ⁇ 0.2.
- W is a hydrogen atom, fluorine, an alkyl group which may have a branched structure having 118 carbon atoms or a branched structure having 118 carbon atoms, and [10]
- W is a hydrogen atom, fluorine, an alkyl group which may have a branched structure having 118 carbon atoms or a branched structure having 118 carbon atoms, and [10]
- An organic electroluminescent device having at least one layer comprising the charge transporting thin film of [10].
- charge-transporting varnish of the present invention mechanical strength and uniformity and flatness are enhanced.
- a charge transporting thin film having excellent thermal properties and transparency can be obtained.
- This thin film can be formed by various methods such as spin coating, printing and spraying.
- the electrode surface By forming the charge transporting thin film of the present invention on the electrode surface, the electrode surface can be flattened and made uniform, and electrical short-circuit can be prevented.
- this thin film especially as a charge injection layer and a charge transport layer of an organic EL device, light emitted from the light emitting layer can be transmitted well and efficiently taken out to the outside. Thus, it is possible to improve the initial characteristics such as the dagger or to prolong the life of the element.
- the charge-transporting varnish of the present invention has high flattening properties and heat resistance, and can be easily formed by various coating methods. It is also useful for application to organic electronic devices, capacitor electrode protective films, and antistatic films.
- FIG. 1 A transmittance spectrum of 400 nm to 700 nm of a thin film produced by coating and baking varnishes (A1) and (A3) on a quartz substrate.
- FIG. 2 is a transmission spectrum at 400 nm to 700 nm of a thin film prepared by applying and baking varnishes (B1) and (B2) on a quartz substrate.
- FIG. 3 A transmittance spectrum of a thin film prepared by coating and baking varnish (C) on a quartz substrate, at 400 nm to 700 nm.
- the charge-transporting varnish according to the present invention comprises a charge-transporting substance comprising a charge-transporting oligosaccharide having a number average molecular weight of 250 to 5000, or a charge-transporting substance comprising the charge-transporting substance and a charge-accepting dopant.
- An organic material containing at least one polymer selected from polyimide and polyimide precursor power, wherein the charge transporting substance or the charge transporting organic material, and the polymer are dissolved or dispersed in at least one solvent (preferably Are uniformly dispersed).
- the limer is preferably dissolved in at least one solvent.
- the charge transporting property is synonymous with conductivity, and means any of a hole transporting property, an electron transporting property, and a charge transporting property of both holes and electrons.
- the charge-transporting varnish of the present invention may be a solid film obtained from varnish, which may have a charge-transporting property.
- the charge transporting material used in the present invention is not particularly limited as long as it is a charge transporting oligomer which is dissolved or dispersed in a solvent. As described above, the flatness and uniformity of the obtained charge transporting thin film are improved. Considering this, those that dissolve in solvents are preferred.
- the number-average molecular weight of the charge-transporting oligo-line is preferably from 250 to 5,000. If the number average molecular weight is less than 250, there is a high possibility that the charge transport property will not be sufficiently exhibited due to too high volatility.On the other hand, if the number average molecular weight exceeds 5,000, the solubility in a solvent will be too low to be suitable for use. High in nature.
- the number average molecular weight is preferably 2000 or less, and most preferably 800 or less.
- the number average molecular weight is a value measured by gel permeation chromatography (in terms of polystyrene).
- the charge transporting substance has uniform solubility and charge transporting property, it is preferable that the charge transporting substance is an oligo-phosphorus having no molecular weight distribution, in other words, having a dispersity of 1. Further, in consideration of solubility in a solvent and transparency of a solution, those subjected to reduction with hydrazine are preferable.
- the oligo-phosphorus derivative represented by the general formula (1) or the quinonediimine derivative which is an oxidation derivative thereof is used. It is suitable.
- R 2 and R 3 each independently represent hydrogen, a monovalent hydrocarbon group, or an organo; And A and B each independently represent a divalent group represented by the general formula (2) or (3).
- R 4 — R 11 each independently represent hydrogen, a hydroxyl group, a monovalent hydrocarbon group, an organooxy group, an acyl group or a sulfone group, and m and n each independently represent 1 or more Satisfies m + n ⁇ 20.) 0 ]
- m + n is preferably 4 or more from the viewpoint of exhibiting good charge transportability, and from the viewpoint of ensuring solubility in a solvent, which is preferably 4 or more. It is preferably 16 or less.
- One of these charge transporting substances may be used alone, or two or more of them may be used in combination.
- Examples of the monovalent hydrocarbon group, organooxy group and acyl group for R 1 to R 11 include the following.
- the monovalent hydrocarbon group examples include alkyl groups such as methyl group, ethyl group, propyl group, butyl group, t-butyl group, hexyl group, octyl group, and decyl group; cyclopentyl group, cyclohexyl group, and the like.
- Cycloalkyl group such as bicyclohexyl group A vinyl group, a 1-propyl group, a 2-propyl group, an isopropyl group, a 1-methyl-2-propyl valley group, a 1,2- or 3-butyr group and a hexyl group; Alkyl groups such as phenyl group; aryl groups such as phenyl group, xylyl group, tolyl group, biphenyl group and naphthyl group; benzyl group, phenyl group and phenylcyclohexyl group. And aralkyl groups, and groups in which part or all of the hydrogen atoms of these monovalent hydrocarbon groups are substituted with halogen atoms, hydroxyl groups, Z or alkoxy groups, and the like.
- organooxy group examples include an alkoxy group, an alkoxy group, an aryloxy group, and the like.
- the alkyl group, the alkoxy group, and the aryl group constituting these groups include the above. And the same groups as those exemplified above.
- acyl group examples include formyl group, acetyl group, propionyl group, butyryl group
- Isoptyryl group valeryl group, isovaleryl group, benzoyl group and the like.
- the number of carbon atoms of the monovalent hydrocarbon group, the organooxy group and the acyl group is not particularly limited, but is generally 120, preferably 118.
- R 1 and R 4 —R 11 are hydrogen; an unsubstituted or substituted aryl group such as a phenyl group, a xylyl group, a tolyl group, a biphenyl group, a naphthyl group; 5 alkyl groups; carbon number
- an alkoxy group particularly, from the viewpoint of improving the solubility in an organic solvent, which is preferred by an acyl group such as a formyl group, an acetyl group, a propioyl group, a butyryl group, an isobutyryl group and a benzoyl group, Hydrogen, an alkyl group having 115 carbon atoms, and an alkoxy group having 115 carbon atoms are preferred.
- an acyl group such as a formyl group, an acetyl group, a propioyl group, a butyryl group, an isobutyryl group and a benzoyl group
- Hydrogen an alkyl group having 115 carbon atoms
- an alkoxy group having 115 carbon atoms are preferred.
- the R 2 is also a point force of increasing the solubility in an organic solvent, hydrogen, an alkyl group having 1 one 5 carbon atoms, full - Le group was Sigma favored will leave to exhibit good charge transportability point And preferably a non-substituted or substituted aryl group such as hydrogen; methyl group; xylyl group, tolyl group, biphenyl group and naphthyl group. From the viewpoint of satisfying both solubility and charge transportability, hydrogen, a methyl group, and a phenyl group are particularly preferable.
- R 3 hydrogen; from the viewpoint of exhibiting good charge transport properties, hydrogen; an unsubstituted or substituted aryl group such as a phenyl group, a xylyl group, a tolyl group, a biphenyl group, and a naphthyl group; Alkyl groups having 115 carbon atoms; alkoxy groups having 115 carbon atoms are preferred, and aryl groups such as phenyl, xylyl, biphenyl and naphthyl are particularly preferred.
- R 1 is a hydrogen atom and R 3 is a phenyl group, that is, both ends of the oligomer-conjugated product of the formula (4) are preferably blocked with a phenol group.
- Such a compound include organic solvents such as phenyltetralin, phenylpentanarine, tetralin (tetralin tetramer), and octarin (non-octane tetramer). Soluble oligo-phosphorus derivatives are mentioned.
- the method for synthesizing these oligo-phosphorus derivatives and the like is not particularly limited.
- Bulletin'ob'Chemical'Society'ob'Japan (Bulletin of Chemical Society of Japan), 1994 67, pp. 1749-1752, and Synthetic Metals, USA, 1997, Vol. 84, pp. 119-120.
- the charge-transporting material constituting the charge-transporting varnish of the present invention includes, in addition to the aspect using only the charge-transporting substance, a charge-transporting organic material comprising a charge-transporting substance and a charge-accepting dopant substance. It can also be used.
- the charge transporting organic material is not particularly limited as long as it is dissolved or dispersed in a solvent. However, in consideration of the flatness and uniformity of the obtained charge transporting thin film, those which are soluble in a solvent are preferable.
- the solubility of the charge-accepting dopant substance is not particularly limited as long as it is soluble in at least one kind of solvent used for the varnish.
- the charge-accepting dopant substance is added for the purpose of improving the charge-transporting ability of the charge-transporting substance.
- the electron-accepting dopant substance is added to the electron-transporting substance.
- a hole-accepting dopant substance is used, and a substance having a high charge-accepting property is desired.
- the charge-accepting dopant substance it is preferable to use an electron-accepting dopant substance as the charge-accepting dopant substance, since the charge-transporting oligo-linker in the charge-transporting varnish generally exhibits hole transportability. .
- the electron-accepting dopant include inorganic strong acids such as hydrogen chloride, sulfuric acid, nitric acid, and phosphoric acid; aluminum chloride ( ⁇ ) (A1C1), titanium tetrachloride (IV) (TiCl), and tribromide.
- inorganic strong acids such as hydrogen chloride, sulfuric acid, nitric acid, and phosphoric acid
- BB tribromide.
- CuCl antimony pentachloride (V) (SbCl), arsenic pentafluoride (V) (AsF), phosphorus pentafluoride (P F), tris (4-bromophenyl) amido-hexaclohexa mouth antimonate (TBPAH), etc.
- Strong organic acids such as benzenesulfonic acid, tosylic acid, camphorsulfonic acid, hydroxybenzenesulfonic acid, 5-sulfosalicylic acid, dodecylbenzenesulfonic acid, and polystyrenesulfonic acid; 7,7,8,8-tetrasia Organic or inorganic oxidizing agents such as noquinodimethane (TCNQ), 2,3-dichloro mouth-5,6-dicyano-1,4-benzoquinone (DDQ), iodine, etc., but are not limited thereto. Absent.
- TCNQ noquinodimethane
- DDQ 2,3-dichloro mouth-5,6-dicyano-1,4-benzoquinone
- iodine iodine
- hole-accepting dopant examples include metal complexes such as alkali metals (Li, Na, K, Cs), lithium quinolinolate (Liq), and lithium acetyl acetonate (Li (acac)). Forces are not limited to these.
- charge-accepting dopant substances may be used alone or in combination of two or more.
- both the charge transport material and the charge-accepting dopant material are amorphous solids.
- a crystalline solid as at least one of the materials.
- After forming a varnish comprising a solvent containing a charge transporting substance, a charge-accepting dopant substance and a high-viscosity solvent described in detail below, it is preferable to use a material exhibiting amorphous solidity.
- the other substance is preferably a substance having random intermolecular interaction.
- a compound having three or more different polar functional groups in the same molecule is preferable.
- Such a compound examples include, but are not particularly limited to, tyrone, dihydroxybenzenesulfonic acid, and a sulfonic acid derivative represented by the general formula (28), and particularly, a compound represented by the general formula (28) Sulfonic acid derivatives are preferred.
- Sulfonic acid derivatives include a sulfosalicylic acid derivative, for example, 5-sulfosalicylic acid.
- D represents a benzene ring, a naphthalene ring, an anthracene ring, a phenanthrene ring or a heterocyclic ring
- R 33 and R 34 each independently represent a carboxyl group or a hydroxyl group.
- the polyimide or the polyimide precursor in the charge transporting varnish of the present invention is prepared by applying and baking the charge transporting varnish of the present invention to the mechanical strength, heat resistance and transparency of the charge transporting thin film. Is added to the charge-transporting varnish for the purpose of mainly improving
- the content of the polyimide or the polyimide precursor in the charge transporting varnish is about 0.1% by weight, more preferably 1% by weight, as the lower limit, based on the total weight of the solid content of the charge transporting varnish. It is still more preferably 5% by weight, and the upper limit is about 50% by weight, more preferably 30% by weight, and still more preferably 20% by weight.
- the polymer used in the present invention is not particularly limited as long as it is a polyimide or a polyimide precursor that dissolves or disperses in a solvent.
- a polymer that dissolves in the solvent is used. U, preferred.
- One kind of polyimide or polyimide precursor may be used, or two or more kinds may be used in combination.
- the polyimide or polyimide precursor used in the present invention is obtained by subjecting the polyimide precursor represented by the general formula (5) or the polyimide precursor to imide dehydration ring closure. It is preferably a polyimide obtained.
- P is at least one tetravalent organic group selected from the general formulas (6) to (12). ) It is preferably a group represented by formula (9).
- Q is at least one kind of divalent organic group selected from general formulas (13) to (19), and k represents a positive integer.
- R 1 R lb independently represents hydrogen, fluorine, or a branched structure having 15 to 15 carbon atoms! /, Or may be an alkyl group or 1 to 5 carbon atoms. It has a branched structure and may represent an alkoxy group.
- R 16 —R 32 each independently represent hydrogen, fluorine, or a branched structure having 115 carbon atoms, and may be an alkyl group or a branched structure having 115 carbon atoms.
- X represents independently a single bond, an ether bond, a thioether bond, an amide bond, or a branched structure having 15 carbon atoms.
- An alkylene group which may have an alkylene dioxo group which may have a branched structure having 1 to 5 carbon atoms, and Y represents a general formula (20):
- Ar 3 and Ar 4 are each independently a divalent benzene ring optionally substituted with W, a divalent naphthalene ring optionally substituted with W, and optionally substituted with W 2
- W represents a bivalent biphenyl group, substituted with W !, may!
- Ar 2 represents W
- W optionally substituted phenyl group, naphthyl group optionally substituted with W, biphenyl group optionally substituted with W, substituted with W!
- i represents an integer of 1 or more and 4 or less.
- alkyl group which may have a branched structure having 115 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, and an s- Butyl, i-butyl, t-butyl, n-pentyl, i-pentyl, neo-pentyl, t-pentyl, 1-methylbutyl, 2-methylbutyl, 1-ethylpropyl and the like.
- alkoxy group which may have a branched structure having 1 to 5 carbon atoms include methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, s-butoxy, i-butoxy, Examples thereof include t-butoxy group, n-pentyloxy group, i-pentyloxy group, neo-pentyloxy group, t-pentyloxy group, 1-methylbutoxy group, 2-methylbutoxy group, and 1-ethylpropoxy group.
- alkylene group having a branched structure having 115 carbon atoms include a methylene group, an ethylene group, a trimethylene group, a tetramethylene group, a pentamethylene group, a propylene group, and an ethylethylene group.
- 1,1-dimethylethylene group 1,2-dimethylethylene group, 1- (n-propyl) ethylene group, l- (i-propyl) ethylene group, 1-ethyl-2-methylethylene group, 1-methyl
- Examples include a trimethylene group, a 2-methyltrimethylene group, a 1,1-dimethyltrimethylene group, a 1,3-dimethyltrimethylene group, and a 1-methyltetramethylene group.
- alkylene dioxo group which may have a branched structure having 1 to 5 carbon atoms include a methylene dioxo group, an ethylene dioxo group, a trimethylene dioxo group, a tetramethylene dioxo group, a pentamethylene dioxo group.
- Propylenedioxo group ethylethylenedioxo group, 1,1-dimethylethylenedioxo group, 1,2-dimethylethylenedioxo group, l- (n-propyl) ethylenedioxo group, l- ( i-propyl) ethylenedioxo group, 1-ethyl-2-methylethylenedioxo group, 1-methyltrimethylenedioxo group, 2-methyltrimethylenedioxo group, 1,1-dimethyltrimethylenedioxo group, 1,3- Dimethyl trimethylene dioxo And a 1-methyltetramethylenedioxo group.
- alkyl group which may have a branched structure having 18 to 18 carbon atoms include, in addition to the above-mentioned alkyl groups having 115 to 5 carbon atoms, an n-xyl group, an i-xyl group, 1-methylpentyl group, 1,3-dimethylbutoxy group, 1-ethylbutyl group, 2-ethylbutyl group, 1-methyl-1-ethylpropyl group, n-butyl group, 1-methylhexyl group, 5-methylhexyl group, 1-ethylpentyl group, l-( n-propyl) butyl group, n-methylpentyl group, 1-methylpentyl group, 2-methylpentyl group, 1-ethylhexyl group, 2-ethylhexyl group and the like.
- alkoxy group which may have a branched structure having 18 to 18 carbon atoms include, in addition to the groups exemplified as the alkoxy group having 15 to 15 carbon atoms, n xyxo group, i xylo oxo group, Methylpentyloxo, 1,3-dimethylbutoxy, 1-ethylbutoxy, 2-ethylbutoxy, 1-methyl-1-ethylpropoxy, n-heptyloxo, 1-methylhexyloxo, 5-methylhexyloxo, 1 -Ethylpentyloxo, l- (n-propyl) butoxy, n-octyloxo, 1-methylpentyloxo, 2-methylpentyloxo, 1-ethylhexyloxo, 2-ethylhexyloxo And the like.
- the polyimide or polyimide precursor used in the present invention may be obtained by subjecting the polyimide precursor represented by the general formula (21) or the polyimide precursor to imide dehydration ring closure.
- the polyimide is obtained.
- Z is Formula (18) or (19) is a force selected that at least one divalent organic radical, u 1 and u 2 are Independently represent an integer of 1 or more, and satisfy uV Cu + u) ⁇ 0.2.
- Z contains a tertiary arylamine skeleton and can act as a charge transporting site, it is introduced mainly for the purpose of improving the charge injection efficiency of a thin film. Therefore, if the proportion of z in the formula is too low, the above-mentioned polyimide precursor or polyimide may not be able to exhibit sufficient charge transport properties. Therefore, in Expression (21), the value of u / (u + u 2 ) is 0.2 as a lower limit, more preferably 0.5, and most preferably 0.8.
- specific skeletons of Z include, for example, general formulas (22) to (27).
- W is a hydrogen atom, fluorine, an alkyl group which may have a branched structure having 118 carbon atoms or a branched structure having 118 carbon atoms
- the method for producing the polyimide or the polyimide precursor used in the charge-transporting varnish of the present invention is not particularly limited.
- the method for producing the polyimide precursor include a method of polymerizing tetracarboxylic acid and its derivative with primary diamine.
- Examples of the method for producing the polyimide include a method in which the polyimide precursor obtained by the above method is heated and dehydrated at 100 to 400 ° C, or a method generally used such as triethylamine Z acetic anhydride.
- a method for performing chemical imidization using any imidization catalyst is exemplified. At this time, a part of the polyimide precursor may be left without imidization in order to secure solubility.
- tetracarboxylic acid derivative used for producing the polyimide precursor tetracarboxylic dianhydride is generally used.
- the ratio of the total number of moles of primary diamine to the total number of moles of tetracarboxylic dianhydride is preferably 0.80 to 1.20. If the primary diamine is used in excess, the coloring of the solution may become darker, and if the acid anhydride is used in excess, an unstable structure such as a polyimide precursor at the terminal of the anhydride may occur. Considering these, the ratio of the total number of moles of the primary diamine is more preferably 1.05-1.10. As in the ordinary polycondensation reaction, the degree of polymerization of the produced polymer increases as the ratio of the total number of moles approaches 1.
- the number average molecular weight of the polyimide or polyimide precursor is preferably from 1,000 to 50,000, particularly preferably from 5,000 to 30,000! .
- the method of reacting and polymerizing tetracarboxylic dianhydride with primary diamine is not particularly limited.
- organic polar solvents such as N-methyl-2-pyrrolidone (hereinafter abbreviated as NMP), N, N-dimethylacetamide (hereinafter abbreviated as DMAc), N, N-dimethylformamide (hereinafter abbreviated as DMF)
- NMP N-methyl-2-pyrrolidone
- DMAc N, N-dimethylacetamide
- DMF N-dimethylformamide
- a primary diamine is dissolved therein, tetracarboxylic dianhydride is added to the solution, and a reaction is performed to synthesize a polyimide precursor.
- the reaction temperature at this time may be any temperature of -20 to 150 ° C, preferably -5 to 100 ° C.
- tetracarboxylic acid and its derivative used for obtaining the polyimide or the polyimide precursor include pyromellitic acid, 2,3,6,7-naphthalenetetracarboxylic acid, 1,2,5 2,6-naphthalenetetracarboxylic acid, 1,4,5,8-naphthalenetetracarboxylic acid, 3,3,, 4,4-biphenyltetracarboxylic acid, 2,3,3 ', 4-biphenyltetracarboxylic acid Acid, bis (3,4-dicarboxyphenyl) ether, 3,3 ', 4,4'-benzophenonetetracarboxylic acid, bis (3,4-dicarboxyphenyl) sulfone, bis (3,4-dicarboxyphenyl) methane, 2,2-bis (3,4-dicarboxyphenyl) propane, 1,1,1,3,3,3-hexene Safolo-2,2-bis (3,4-bis
- the diamine used for obtaining the polyimide or the polyimide precursor is not particularly limited.
- Examples of the solvent used for obtaining the charge-transporting varnish of the present invention include water, methanol, DMF, DMAc, NMP, N, N, -dimethylimidazolidinone, dimethylsulfoxide, and chlorosulfonate. Mouth form, toluene, etc. Forces are not limited to these. These solvents may be used alone or in combination of two or more.
- a high-viscosity solvent may be mixed in the charge-transporting varnish of the present invention for the purpose of obtaining a high-viscosity varnish as long as the solubility of the charge-transporting substance and the like is not impaired.
- high viscosity solvents include cyclohexanol, ethylene glycol, ethylene glycol diglycidyl ether, 1,3-butylene glycol, diethylene glycol, dipropylene glycol, triethylene glycol, tripropylene glycol, 1,3- Butanediol , 1,4-butanediol, propylene glycol, hexylene glycol and the like.
- cyclohexanol and dipropylene glycol are particularly preferable because they have an appropriate viscosity and a boiling point and exhibit good coating properties on a substrate.
- a solvent that imparts flatness to the film during firing may be added.
- a solvent include butyl sorbitol, diethylene glycol getyl ether, dipropylene glycol monomethyl ether, ethyl carbitol, diacetone alcohol, dibutyrolataton, and ethyl lactate. is not.
- the charge transporting thin film according to the present invention is prepared using the above-described charge transporting varnish, and is a hole injection layer or a hole transport layer, or an electron injection layer or an electron injection layer of an organic EL device. It can be suitably used as an electron transport layer.
- This thin film can be produced, for example, by applying a charge transporting varnish on a substrate and evaporating the solvent.
- the coating method of the varnish is not particularly limited, and various known coating methods such as a dip method, a spin coating method, a transfer printing method, a roll coating method, an ink jet method, a spray method, and a brush coating can be adopted. Uniform film formation is possible.
- the method of evaporating the solvent is not particularly limited, and the solvent is evaporated under a suitable atmosphere, that is, under an atmosphere of an inert gas such as air or nitrogen, or in a vacuum, using a hot plate or an oven. It is possible to obtain a thin film having an appropriate film formation surface.
- the firing temperature is not particularly limited as long as the solvent can be evaporated, but it is preferable that the firing is performed at 40 to 250 ° C. Two or more temperature changes may be applied to develop higher uniform film forming properties or to make the reaction proceed on the substrate.
- the thickness of the charge transporting thin film is not particularly limited, but is preferably 5 to 200 nm when used as a charge injection layer in an organic EL device.
- a method of changing the film thickness there is a method of changing a solid content concentration in a varnish or a method of changing a solution amount on a substrate at the time of application.
- the method for producing an OLED device using the charge-transporting varnish (charge-transporting thin film) of the present invention includes the following materials.
- the present invention is not limited thereto. It is preferable that the electrode substrate to be used is previously cleaned by liquid cleaning with a detergent, alcohol, pure water, or the like, and that the anode substrate is subjected to surface treatment such as ozone treatment or oxygen-plasma treatment immediately before use. However, when the anode material is mainly composed of an organic substance, the surface treatment may not be performed.
- a thin film may be formed by the following method.
- the hole transporting varnish is applied to the anode substrate by the above-described coating method, and a hole transporting thin film is formed on the anode.
- This is introduced into a vacuum deposition apparatus, and a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and a cathode metal are sequentially deposited to form an OLED element.
- a carrier block layer may be provided between any layers in order to control the light emitting region.
- anode material examples include transparent electrodes typified by indium tin oxide (ITO) and indium zinc oxide (IZO), and those subjected to a flattening treatment are preferable.
- ITO indium tin oxide
- IZO indium zinc oxide
- a polythiophene derivative having a high charge transporting property or a polyaline can also be used.
- a material for forming the hole transporting layer for example, a (triphenylamine) dimer derivative
- Triarylamines such as (TPD), (a-naphthyldiphenylamine) dimer ( ⁇ NPD), [(triphenylamine) dimer] spiro dimer (Spiro-TAD), 4,4,4 ”-tris [3 —Methylphenyl (phenyl) amino) triphenylamine (m—MTDATA), 4,4,4 ”—Tris [1 naphthyl (phenyl) amino] triphenylamine (1 TNATA) Stormines; 5,5 "-bis- ⁇ 4- [bis (4-methylphenyl) amino] phenyl ⁇ -2,2 ': 5,2 ,: oligothiophenes such as tertiophen (BMA-3T) And the like.
- Examples of the material for forming the light emitting layer include, for example, tris (8-quinolinolate) aluminum ( ⁇ ) (Alq), bis (8-quinolinolate) zinc (n) (Znq), bis (2-methyl-8-quinolinolate) (p
- the light-emitting layer may be formed by co-evaporating the above-described material for forming the hole transport layer or the material for forming the electron transport layer described below and a luminescent dopant.
- the electron transport layer for example, Alq, BAlq, DPVBi, (2- (4-bifu
- Examples of a material for forming the electron injection layer include lithium oxide (Li 0) and magnesium oxide.
- cathode material for example, aluminum, magnesium "! Good alloy, aluminum-lithium alloy, lithium, sodium, potassium, cesium and the like can be mentioned.
- Examples of the material for forming the carrier block layer include PBD, TAZ, BCP, and the like.
- a thin film may be formed by the following method.
- the electron transporting varnish is applied to the cathode substrate by the above-mentioned coating method, and an electron transporting thin film is formed on the cathode substrate.
- This is introduced into a vacuum evaporation apparatus, and an electron transport layer, a light emitting layer, a hole transport layer, and a hole injection layer are formed using the same materials as described above, and then an anode material is formed by a method such as sputtering. To form an OLED element.
- Examples of a method for producing a PLED device using the charge transporting varnish of the present invention include the following methods, but are not limited thereto.
- the charge transport varnish of the present invention is formed A PLED device including a flat charge transporting thin film can be manufactured.
- a hole transporting thin film is formed on an anode substrate in the same manner as the OLED element, a luminescent charge transporting polymer layer is formed thereon, and a cathode electrode is further deposited.
- PLE D element a hole transporting thin film is formed on an anode substrate in the same manner as the OLED element, a luminescent charge transporting polymer layer is formed thereon, and a cathode electrode is further deposited.
- an electron transporting thin film is formed on the cathode substrate in the same manner as the OLED element, a luminescent charge transporting polymer layer is formed thereon, and the anode electrode is formed by sputtering, vapor deposition, spin coating, or the like. To make a PLED element.
- the same materials as those exemplified for the OLED element can be used.
- Cleaning treatment and surface treatment can be performed in the same manner as the treatment method described for the OLED element.
- a solvent is added to a luminescent charge transporting polymer material or a material to which a luminescent dopant is added and dissolved or dispersed to form a hole injection layer. After coating on a previously formed electrode substrate, there is a method in which a solvent is evaporated to form a film.
- luminescent charge-transporting polymer material examples include polyfluorene derivatives such as poly (9,9-dialkylfluorene) (PDAF) and poly (2-methoxy-5- (2, ethylhexoxy) -1,4 phenyl).
- Polyphenylene bilene derivatives such as -Lenbi-lene) (MEH-PPV); polythiophene derivatives such as poly (3-alkylthiophene) (PAT); and polybutylcarbazole (PVCz).
- Examples of the solvent include toluene, xylene, and chloroform.
- Examples of the dissolution or uniform dispersion method include methods such as stirring, heating and stirring, and ultrasonic dispersion.
- the application method is not particularly limited, and examples thereof include a dip method, a spin coating method, a transfer printing method, a roll coating method, an ink jet method, a spray method, and a brush coating. It is desirable to apply under gas.
- Examples of the method of evaporating the solvent include a method of heating in an oven or a hot plate under an inert gas or in a vacuum.
- the viscosity was measured using an E-type viscometer (ELD-50, manufactured by Tokyo Keiki Co., Ltd.), and the molecular weight of the polymer was measured using a GPC column (KD-803ZKD-805, Shodeki).
- ELD-50 manufactured by Tokyo Keiki Co., Ltd.
- GPC column KD-803ZKD-805, Shodeki
- the measurement was carried out using a GPC device (SSC-7200, manufactured by Sensyu Kagaku) equipped with Tas Corporation.
- the film thickness was measured using a surface profile measuring device (DEKTAK3ST, manufactured by Nippon Vacuum Engineering Co., Ltd.), and the surface roughness was measured using an atomic force microscope (AFM) Kenoscope (registered trademark) IIIa, manufactured by Veco Japan. Measured.
- AFM atomic force microscope
- OLED device luminance, current density, efficiency, and other device characteristics are measured using an organic EL luminous efficiency measurement device (EL-1003, manufactured by Precise Gauge), and electrical conductivity is measured using a semiconductor parameter analyzer (4156C, Agilent). Was used.
- the transmittance was measured using a visible ultraviolet absorption spectrometer (UV-3100PC, manufactured by Shimadzu Corporation).
- DDE 4,4, diaminodiphenyl ether
- PMDA pyromellitic anhydride
- CBDA 1,2,3,4-cyclobutanetetracarboxylic anhydride
- the ITO glass substrate was cleaned with ozone for 40 minutes immediately before spin coating of the varnish.
- the varnish (A1) prepared above was applied on an ITO glass substrate by spin coating, and baked at 200 ° C. for 1 hour under air to form a uniform thin film of 30 nm. Electric conductivity at 100 mA / cm 2 current of the resulting thin film 3. was 1 X 10- 7 Scm- 1.
- Example 2 PTA obtained in Synthetic Example 1 and 4-molar equivalent of 5-TAS based on PTA were dissolved in N, N-dimethylacetamide (DMAc) under a nitrogen atmosphere. . To this solution was added a 15% NMP solution of the polyamic acid ( ⁇ -a) obtained in Synthesis Example 2 so that the polyamic acid was 3% by weight, 15% by weight, and 20% by weight of the total solid content, respectively. Furthermore, varnishes (A2), (A3) and (A4) each having a solid content of 4% were prepared by stirring and stirring cyclohexanol.
- DMAc N, N-dimethylacetamide
- Each of the obtained varnishes was applied on an ITO substrate by the method described in Example 1, and baked at 200 ° C. for 1 hour under air to form a uniform thin film of 30 nm. Electrical conductivity of 100m AZcm 2 during energization of the obtained thin film, respectively 4. 0 X 10 "7 Scm _1 , 3. 6 X 10" 7 Scm _1, was 1. 3 X 10-Scm- 1 .
- the obtained varnish (C) was applied on an ITO substrate by the method described in Example 1, and baked at 200 ° C. for 1 hour under air to form a uniform thin film of 30 nm. Electrical conductivity of LOOmAZcm 2 during energization of the obtained thin film 3. was 6 X 10- 7 Scm- 1.
- the varnishes obtained in Examples 13 to 13 were each formed as a hole transporting thin film on an ITO glass substrate by the method described in Example 1, and then introduced into a vacuum evaporation apparatus, where a-NPD was used. Alq, LiF and A1 were sequentially deposited. Thickness is 40nm, 60nm, 0.5nm, 100nm
- the deposition rate was set to 0. 3-0. 4nmZs except Li F, 0. for LiF 02-0. 04nm / s
- the moving operation between the vapor deposition operations was performed in a vacuum. Table 1 shows the characteristics of the obtained OLED device.
- LiF and A1 were sequentially deposited. Each film thickness 40 nm, 60 nm, 0. 5 nm, and LOOnm, the force becomes their respective 8 X 10- 4 Pa or less pressure also performs deposition operation, the deposition rate is 0. 3-0 except LiF. 4 nmZs, and LiF was 0.02-0. 04 nm / s. The moving operation between the vapor deposition operations was performed in a vacuum. Table 1 shows the characteristics of the obtained OLED device.
- the OLED element of Example 4 including the thin films each having the varnish force prepared in Examples 13 to 13 as the hole transporting thin film was the thin film having the varnish force prepared in Comparative Example 1. It can be seen that the device has a lower emission start voltage and a higher efficiency than the OLED device of Comparative Example 3 which includes as a hole transporting thin film.
- Example 1 and Example 2 were applied by spin coating on a quartz substrate that had been subjected to ozone cleaning for 40 minutes until immediately before spin coating. It was baked at 200 ° C for 1 hour to form a uniform thin film of 30 nm.
- the transmittance of the obtained substrate was measured by a visible ultraviolet absorption spectrum ( ⁇ ⁇ VIS spectrum) apparatus. Fig. 1 shows the obtained transmittance spectrum.
- the varnishes (B1) and (B2) obtained in Example 3 were spin-coated on a quartz substrate that had been ozone-washed for 40 minutes until immediately before spin-coating, and this was applied at 200 ° C under air. It was baked for 1 hour to form a uniform thin film of 30 nm.
- the transmittance of the obtained substrate was measured by a visible ultraviolet absorption spectrum ( ⁇ ⁇ VIS spectrum) apparatus.
- Fig. 2 shows the transmittance transmittance obtained.
- the varnish (C) obtained in Comparative Example 1 was applied on a quartz substrate by the method described in Example 5. This was baked at 200 ° C for 1 hour in air to form a uniform thin film of 30 nm.
- the transmittance of the obtained substrate is measured with a visible ultraviolet absorption spectrum ( ⁇ ⁇ VIS spectrum) device. did.
- Fig. 3 shows the obtained transmittance spectrum.
- TPD-DA N, N, diphenyl N, N, di (4- (aminophenoxy) phenyl) benzidine
- TPD-DAI. 69 g (2.4 mmol) and p-phen-dienamine 1.03 g (9.6 mmol) were placed in a lOOmL four-necked flask, and dissolved in NMP12. Og. A suspension of 2.26 g (11.5 mmol) of CB DA in 32.8 g of NMP was added. This was stirred at 23 ° C. for 6 hours to carry out a polymerization reaction to obtain a 10% NMP solution of a polyamic acid (PI—x3) as a polyimide precursor.
- TPD-DA represented by the following formula and used in the above Synthesis Examples 416 was synthesized according to the method described in WO 02 Z100949 pamphlet. [0089] [Formula 23]
- the thin film formation of the obtained varnish on the ITO glass substrate was performed by the following method.
- the obtained varnish (XI) was applied on the ITO glass substrate which had been subjected to ozone washing for 40 minutes immediately before spin coating of the varnish by spin coating. This was baked at 200 ° C for 1 hour in air to form a uniform thin film of 30 nm.
- Electric conductivity Shirubedo of LOOmAZcm 2 during energization of the obtained thin film 4. was 8 X 10- 7 Scm- 1.
- a 10% NMP solution of the polyamic acid (PI-x2) obtained in Synthesis Example 5 was added to a DMAc solution of PTAZ5-SSA prepared by the method described in Example 7 so that the polyamic acid contained 10% by weight of the total solid content.
- the varnish (X2) having a solid content concentration of 5% was prepared by stirring the mixture and then stirring the mixture with cyclohexanol.
- the obtained varnish was applied on an ITO substrate by the method described in Example 7, and baked at 200 ° C. for 1 hour in the air to form a uniform thin film of 30 nm. Electrical conductivity of LOOmAZcm 2 during energization of the obtained thin film 4.
- a varnish (X3) having a solid content of 5% was prepared in the same manner as in Example 8, except that the polyamic acid (PI-x3) obtained in Synthesis Example 6 was used.
- the obtained varnish was applied on an ITO substrate by the method described in Example 7, and baked at 200 ° C. for 1 hour in the air to form a uniform thin film of 30 nm. Electrical conductivity of LOOmAZcm 2 during energization of the obtained thin film, the dark at 4.
- a varnish (X4) having a solid content concentration of 5% was prepared in the same manner as in Example 7, except that the polyamic acid (PI-b) obtained in Synthesis Example 3 was used.
- the obtained varnish was applied on an ITO substrate by the method described in Example 7, and baked at 200 ° C. for 1 hour in air to form a uniform thin film of 30 nm.
- the resulting LOOmAZcm 2 electric conductivity during energization of the thin film 5.
- the varnish (XI-X4) obtained in Examples 7-10 was formed as a hole transporting thin film on an ITO glass substrate by the method described in Example 7, and then introduced into a vacuum evaporation apparatus. ⁇ - ⁇ D, Alq, LiF, and Al were sequentially deposited. The film thickness is 40nm, 45nm, 0.5nm, 100 ⁇ respectively
- Each polyamic acid is contained at 10% by weight based on the total solid content of the varnish.
- each OLED element of Example 11 including a film made from a varnish (XI-X4) using a polyamic acid were characterized by containing a polyamic acid. It can be seen that the device exhibits lower emission start voltage, lower drive voltage, and higher efficiency than the device of Comparative Example 6 including the film made of varnish (Z).
- a device provided with a varnish using a polyamic acid having a triarylamine skeleton (XI—X3) was also prepared using a varnish using a polyamic acid without a triarylamine skeleton (X4). Emission start is lower than that of a device with a thin film.
- a 10% NMP solution of the polyamic acid (PI--x3) obtained in Synthesis Example 6 was added to a DMAc solution of PTAZ5-SSA prepared by the method described in Example 7, and the polyamic acid contained 20% of the total solid content.
- the varnishes (X5, X6) having a solid concentration of 5% were prepared by adding cyclohexanol to the mixture, respectively, and stirring the mixture.
- Each varnish (X3, X5, X6) obtained in Examples 9 and 12 was formed as a hole-transporting thin film on an ITO glass substrate by the method described in Example 7, and then placed in a vacuum evaporation apparatus. Then, a-NPD, Alq, LiF and A1 were sequentially deposited. The film thickness is 30 nm and 40 respectively.
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Abstract
Description
Claims
Priority Applications (5)
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JP2006511487A JP5110257B2 (ja) | 2004-03-25 | 2005-03-24 | 電荷輸送性ワニス及びそれを用いた有機エレクトロルミネッセンス素子 |
KR1020067019245A KR101166087B1 (ko) | 2004-03-25 | 2005-03-24 | 전하수송성 와니스 및 그것을 사용한 유기일렉트로루미네슨스 소자 |
US10/593,772 US8822039B2 (en) | 2004-03-25 | 2005-03-24 | Charge-transporting varnish and organic electro-luminescent devices made by using the same |
EP05727092A EP1728827A4 (en) | 2004-03-25 | 2005-03-24 | LOAD TRANSPORT LACQUER AND ORIGINAL ELECTROLUMINESCENT PRODUCTS MANUFACTURED THEREFOR |
CN2005800156466A CN1954031B (zh) | 2004-03-25 | 2005-03-24 | 电荷输送性清漆及使用它的有机电致发光元件 |
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US (1) | US8822039B2 (ja) |
EP (1) | EP1728827A4 (ja) |
JP (1) | JP5110257B2 (ja) |
KR (1) | KR101166087B1 (ja) |
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JP2015166844A (ja) * | 2014-02-13 | 2015-09-24 | Jsr株式会社 | 液晶配向剤、液晶配向膜、液晶表示素子、位相差フィルム、位相差フィルムの製造方法、重合体及び化合物 |
TWI673255B (zh) * | 2015-02-24 | 2019-10-01 | 日商日產化學工業股份有限公司 | 苯胺衍生物及其利用 |
WO2023120304A1 (ja) * | 2021-12-22 | 2023-06-29 | 三菱瓦斯化学株式会社 | 半導体樹脂材料、その成形体、及びその使用、並びにフレキシブルプリント材料 |
Also Published As
Publication number | Publication date |
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CN1954031B (zh) | 2010-06-09 |
EP1728827A1 (en) | 2006-12-06 |
KR101166087B1 (ko) | 2012-07-23 |
EP1728827A4 (en) | 2010-02-03 |
TW200540253A (en) | 2005-12-16 |
US20070187672A1 (en) | 2007-08-16 |
TWI395802B (zh) | 2013-05-11 |
JPWO2005092984A1 (ja) | 2008-02-14 |
JP5110257B2 (ja) | 2012-12-26 |
CN1954031A (zh) | 2007-04-25 |
KR20070004735A (ko) | 2007-01-09 |
US8822039B2 (en) | 2014-09-02 |
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