WO2005107335A1 - 良溶媒及び貧溶媒を含有するワニス - Google Patents
良溶媒及び貧溶媒を含有するワニス Download PDFInfo
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- WO2005107335A1 WO2005107335A1 PCT/JP2005/008118 JP2005008118W WO2005107335A1 WO 2005107335 A1 WO2005107335 A1 WO 2005107335A1 JP 2005008118 W JP2005008118 W JP 2005008118W WO 2005107335 A1 WO2005107335 A1 WO 2005107335A1
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- C—CHEMISTRY; METALLURGY
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
- H01B1/122—Ionic conductors
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/02—Polyamines
- C08G73/026—Wholly aromatic polyamines
- C08G73/0266—Polyanilines or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/08—Polyhydrazides; Polytriazoles; Polyaminotriazoles; Polyoxadiazoles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/18—Polybenzimidazoles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/22—Polybenzoxazoles
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- 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
- C09D165/00—Coating compositions based on macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Coating compositions based on derivatives of such polymers
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- 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
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- 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
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- 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
- C09D179/06—Polyhydrazides; Polytriazoles; Polyamino-triazoles; Polyoxadiazoles
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/15—Deposition of organic active material using liquid deposition, e.g. spin coating characterised by the solvent used
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- 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
- H10K50/15—Hole transporting layers
- H10K50/155—Hole transporting layers comprising dopants
Definitions
- the present invention relates to a varnish containing a good solvent and a poor solvent.
- organic compounds particularly polymers and oligomers
- organic compounds are used as electronic device materials, they are often used as thin films.
- examples include an insulating film, a charge transporting film, a protective film, and a planarizing film.
- a charge transporting thin film made of a polymer or an oligomer is used for a hole transport layer (buffer layer) and a charge injection layer (for example, Patent Document 1).
- the charge transporting thin film is required to be a uniform thin film without unevenness.
- the unevenness of the thin film 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 organic EL devices.
- This unevenness is thought to be caused by agglomeration of the material, and is thought to be caused by a portion of the film rising or sinking, thereby reducing the uniformity of the film.
- Patent Document 1 JP 2002-151272 A
- the present invention has been made in view of such circumstances, and is suitable for use as a thin film for an electronic device and a thin film in other technical fields.
- Another object of the present invention is to provide, as an electronic device application, an organic EL element including a charge transporting thin film having almost no foreign matter.
- the present inventors have studied so far a method of providing a uniform thin film free of foreign substances. As a result of intensive studies on the solvent composition, the present inventors have been surprised. What we should know is that we have found that the generation of foreign matter can be remarkably suppressed by the solvent composition of the varnish, and found a varnish that gives a thin film with almost no foreign matter.
- the present inventors have found that a combination of a good solvent and a poor solvent having a boiling point lower than that of the good solvent by at least 20 ° C (under 760 mmHg) can effectively suppress the generation of foreign matter in the thin film.
- a combination of a good solvent and a poor solvent having a boiling point lower than that of the good solvent by at least 20 ° C (under 760 mmHg) can effectively suppress the generation of foreign matter in the thin film.
- the present invention provides the following inventions [1] to [16].
- a varnish comprising a solvent, wherein the substrate is dissolved in the solvent.
- the substrate is a charge-transporting monomer, or a charge-transporting substance comprising a charge-transporting oligomer or polymer having a number average molecular weight of 200,000 to 500,000, or this charge-transporting substance and an electron-accepting dopant substance or a hole-accepting substance.
- the charge-transporting varnish of [1] which is a charge-transporting organic material that is a dopant substance.
- the conjugated unit is substituted or unsubstituted, and divalent to tetravalent, a-line, thiophene, dithiin, furan, pyrrole, ethinylene, vinylene, phenylene, naphthalene, anthracene, imidazole, oxazole, Oxadiazole, quinoline, quinoxalin, silanolene, silicon, pyridine, pyrimidine, pyrazine, phenylenevinylene, fuorelenren, canolenosol, triarylamine, metal- or metal-free phthalocyanine, and metal- or metal-free
- the porphyrinker is at least one selected from the group [3].
- R 2 and R 3 are each independently hydrogen, hydroxyl, halogen, amino, silanol, thiol, carboxyl, sulfonic, phosphoric, phosphate, ester, ester, thioester, or amide.
- R 4 to R U are each independently hydrogen, hydroxyl, halogen, amino, silanol, thiol, carboxyl, sulfonic, phosphoric, phosphoric, ester, ester, A thioester group, an amide group, a nitro group, a monovalent hydrocarbon group, an organooxy group, an organoamino group, an organosilyl group, an organothio group, an acyl group or a sulfone group, and m and n each independently represent 1 or more And m + n ⁇ 20.) 0 ]
- the charge-transporting substance is an oligo-phosphorus derivative represented by the general formula (4), or an oxidant of the general formula (4) [5]
- the charge transporting varnish according to [5] which is a quinone dimine derivative.
- D represents a benzene ring, a naphthalene ring, an anthracene ring, a phenanthrene ring or a heterocyclic ring
- R 12 and R 13 each independently represent a carboxyl group or a hydroxyl group.
- R "to R 18 each independently represent a hydrogen atom, an unsubstituted or substituted monovalent hydrocarbon group or a halogen atom
- X represents a single bond, indicates 0, S or NH
- A is hydrogen Atom, halogen atom, 0, S, S (O) group, S (0) group, or N, unsubstituted or
- y is an integer that satisfies 1 ⁇ , which is equal to the valence of A, and denotes the number of sulfonic acid groups bonded to the benzene ring portion of the 1,4-benzodioxane skeleton, and l ⁇ x ⁇ 4.
- An organic electroluminescent device comprising the charge transporting thin film of [10] or [11]
- a method for producing a charge transporting thin film comprising using the charge transporting varnish of any one of [2] to [8].
- a charge transporting varnish with a solid content of 1.0% was also produced.
- a charge transporting thin film characterized by the following.
- the varnish of the present invention it is possible to obtain a thin film with high flatness and uniformity, in which generation of foreign matter is remarkably suppressed, with good reproducibility.
- the present inventors carried out quantitative determination of foreign substances using a KLA-Tencor surface foreign substance inspection system Surfscan (trademark) 6220 in order to evaluate the generation of foreign substances semi-quantitatively and on a large-sized substrate. did. From this measurement, it was confirmed that the thin film obtained by the varnish of the present invention was a film having high flatness and uniformity and in which generation of foreign matter was significantly suppressed.
- the varnish of the present invention can be easily produced using an organic solvent containing no water.
- the varnish can be formed by various wet processes such as a spin coating method, a printing method, an ink jet method or a spray method, and can form a thin film on a substrate at low cost and with good yield.
- a printing method, an ink jet method, a spray method, or the like is more practical than a spin coating method as an industrial process from the viewpoint of device yield and production efficiency.
- the charge-transporting varnish of the present invention can respond to these industrial processes and can provide a highly reliable charge-transporting thin film with good reproducibility.
- the charge transporting thin film having extremely few foreign substances exhibits an excellent effect of preventing an electric short circuit when used for an organic EL device.
- This effect is particularly effective in the case of a noisy matrix in organic EL.
- noisy matrices cause display defects that change the light emission characteristics of one column of image display lines due to electrical shorts caused by foreign matter. This mode is easy.
- the charge-transporting thin film obtained by using the charge-transporting varnish of the present invention prevents an electric short circuit caused by foreign matter from the outside and, at the same time, has a very small amount of foreign matter in the thin film itself. Is very unlikely to occur. For this reason, the present invention naturally exerts an effect not only on the production of the passive matrix but also on the production of the active matrix. Further, by using the charge transporting thin film of the present invention, it becomes possible to stably produce a device having high yield and high production efficiency in the industrialization of organic EL devices.
- the charge transporting thin film of the present invention when used for a hole injection layer or a hole transporting layer of an EL device, has excellent flatness and uniformity as compared with a conventional charge transporting thin film. Can be formed, and the short circuit of the electrode caused by the unevenness of the ITO electrode and the foreign matter present on the electrode can be remarkably suppressed.
- the emission start voltage of the EL element can be reduced, the current efficiency can be improved, and the life of the element can be prolonged. It can be made.
- the charge transporting thin film obtained from the charge transporting varnish of the present invention can be applied to various substrates by various coating methods to form a film.
- FIG. 1 is a view showing the results of a surface foreign matter inspection measurement of a charge transporting thin film obtained by forming a varnish of Example 1 on a silicon wafer and firing the varnish.
- FIG. 2 is a diagram showing the results of a surface foreign matter inspection measurement of a charge transporting thin film obtained by forming a varnish of Comparative Example 1 on a silicon wafer and firing it.
- FIG. 3 is a view showing the results of a surface foreign matter inspection measurement of a charge transporting thin film obtained by forming a varnish of Comparative Example 2 on a silicon wafer and firing it.
- FIG. 4 is a view showing the results of a surface foreign matter inspection measurement of a charge transporting thin film obtained by forming a varnish of Comparative Example 3 on a silicon wafer and firing it.
- the varnish according to the present invention has an organic compound having a molecular weight of 200 to 1000 or a substrate having an oligomer or polymer power having a molecular weight of 200 to 500,000, a good solvent and a boiling point (at 760 mmHg) lower than that of the good solvent by at least 20 ° C. It contains a solvent containing a poor solvent, and the substrate is dissolved in the solvent.
- the substrate is a charge-transporting monomer or a charge-transporting oligomer having a number-average molecular weight of 200,000 to 500,000 or a charge-transporting substance having a polymer power, or the charge-transporting substance and an electron-accepting dopant or a hole.
- a charge-transporting organic material is a charge-transporting varnish.
- 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 have a charge-transporting property, or may have a charge-transporting property to a solid film obtained by using a varnish.
- the method for producing the charge transporting varnish is not particularly limited. Generally, it can be manufactured by mixing each material.
- the organic compound, oligomer or polymer used in the present invention is not particularly limited as long as it is soluble in a solvent.
- the charge-transporting monomer, charge-transporting oligomer or polymer used in the present invention is not particularly limited as long as it is soluble in a solvent. However, it is preferable that the charge-transporting monomer, charge-transporting oligomer or polymer has a structure in which at least one kind of conjugated unit is continuous.
- the conjugated unit is not particularly limited as long as it is an atom, an aromatic ring, or a conjugated group capable of transporting charge, but is preferably a substituted or unsubstituted di- to tetravalent a-phosphorus group, thiophene.
- substituent of the conjugate unit include hydrogen, a hydroxyl group, a halogen group, an amino group, a silanol group, a thiol group, a carboxyl group, a sulfonic acid group, a phosphoric acid group, and a phosphorus atom.
- 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 A cycloalkyl group such as a group; a bicycloalkyl group such as a bicyclohexyl group; a butyl group, a 1-propyl group, a 2-propyl group, an isopropyl group, a 1-methyl-2-probe group, Alkyl groups such as 1-, 2- or 3-butenyl and hexyl groups; aryl groups such as phenyl, xylyl, tolyl, biphenyl and naphthyl; benzyl, phenyl and the like.
- alkyl groups such as methyl group, ethyl group, propyl group, butyl group
- Examples thereof include an aralkyl group such as a phenylcyclohexyl group, and a monovalent hydrocarbon group in which part or all of the hydrogen atoms are substituted with a halogen atom, a hydroxyl group, an alkoxy group, or the like.
- organooxy group examples include an alkoxy group, an alkenyl group, an aryloxy group and the like.
- alkyl group the alkenyl group and the aryl group, those similar to the groups exemplified above are exemplified. No.
- organoamino group examples include a phenylamino group, a methylamino group, an ethylamino group, a propylamino group, a butylamino group, a pentylamino group, a hexylamino group, a heptamino group, an octylamino group, a nor-amino group, a decylamino group, and a laurylamino group.
- alkylamino group such as a dimethylamino group, a dimethylamino group, a diethylamino group, a dipropylamino group, a dibutylamino group, a dipentylamino group, a dihexylamino group, a diheptylamino group, a dioctylamino group, a dino-amino group, a didecylamino group, etc.
- organosilyl group examples include a trimethylsilyl group, a triethylsilyl group, a tripropylsilyl group, a tributylsilyl group, a tripentylsilyl group, a trihexylsilyl group, and a penyl group.
- examples include a tyldimethylsilyl group, a hexyldimethylsilyl group, an octyldimethylsilyl group, and a decyldimethylsilyl group.
- organothio group examples include alkylthio groups such as methylthio, ethylthio, propylthio, butylthio, pentylthio, hexylthio, heptylthio, octylthio, nonylthio, decylthio, laurylthio, and the like.
- the acryl group examples include a formyl group, an acetyl group, a propionyl group, a butyryl group, an isoptyryl group, a valeryl group, an isovaleryl group, a benzoyl group and the like.
- the number of carbon atoms in an alkyl group, an alkoxy group, a thioalkyl group, an alkylamino group, an organosiloxy group, an organosilyl group and the like is not particularly limited, but generally has 1 to 20, preferably 1 to 8 carbon atoms.
- Preferred substituents include fluorine, a sulfonic acid group, a substituted or unsubstituted organooxy group, an alkyl group, an organosilyl group and the like.
- the conjugated chain formed by connecting the conjugated units may include a cyclic portion.
- the molecular weight of the charge transporting monomer is from 200 to 1,000.
- the number average molecular weight of the charge transporting polymer is from 5,000 to 500,000. If the number average molecular weight exceeds 500,000, the solubility in a solvent is too low and it is suitable for use.
- the number-average molecular weight of the charge-transporting oligomer is usually 200 or more, preferably 400 or more, as a lower limit for suppressing volatilization of the material and producing the charge-transporting property, and is usually 5000 or more as an upper limit for improving the solubility. Or less, preferably 2000 or less.
- a charge transporting oligomer having no molecular weight distribution is preferable, and its molecular weight is usually 200 or more, preferably 400 or more as a lower limit in terms of suppression of volatilization of the material and development of charge transportability. From the viewpoint of improvement, the upper limit is usually 5000 or less, preferably 2000 or less.
- the number average molecular weight is a value measured by gel permeation chromatography (in terms of polystyrene).
- the charge transport material exhibits high solubility and high charge transportability and has an appropriate ionization potential, it is particularly suitable for the oligo-phosphorus derivative represented by the general formula (1). It is preferable to use a quinone dimine derivative, which is an isomer or its oxidant. It is more desirable to carry out a reduction operation with hydrazine with respect to the oligoane derivative.
- R 3 are each independently hydrogen, hydroxyl, halogen, amino, silanol, thiol, carboxyl, sulfonic, phosphoric, phosphate, ester, thioester, amide,
- a nitro group a monovalent hydrocarbon group, an organooxy group, an organoamino group, an organosilyl group, an organothio group, an acyl group or a sulfone group
- a and B are each independently represented by the following general formula (2) or (3). Is a divalent group.
- R 4 to R U are each independently hydrogen, hydroxyl, halogen, amino, silanol, thiol, carboxyl, sulfonic, phosphoric, phosphoric, ester, ester, A thioester group, an amide group, a nitro group, a monovalent hydrocarbon group, an organooxy group, an organoamino group, an organosilyl group, an organothio group, an acyl group or a sulfone group, and m and n each independently represent an integer of 1 or more. , M + n ⁇ 20.
- the quinone diimine compound means a compound having a partial structure represented by the following formula in its skeleton. [0030] [Dani 8]
- substituents include the same substituents as those described above for the substituent on the conjugate unit, and these substituents are further substituted with any other substituent. It may be.
- the oligo-phosphorus derivative represented by the general formula (4) or It is preferable to use a quinone dimine derivative which is the acid dandelion.
- m + n has a point of exhibiting good charge transportability and a force of 4 or more from the viewpoint of securing solubility in a solvent, which is preferable. The following is preferred.
- charge transporting materials may be used alone or in combination of two or more.
- Oligo-phosphorus derivatives which are soluble in organic solvents, such as tert-phosphoric acid (tetraphosphoric acid tetramer) and octa-phosphoric acid (transferric octamer).
- the method for synthesizing these charge-transporting oligomers is not particularly limited, but may be an oligo-phosphorine synthesis method (Bulletin of Chemical, Society of Ob Japan). Chemical Society of Japan), 1994, Vol. 67, pp. 1749-1752, and Synthetic Metals (USA), 1997, Vol. 84, pp. 119-120, and synthesis of oligothiophene Laws (see, for example, Heterocycles, 1987, vol. 26, p. 939-942, and Heterocycles, 1987, vol. 26, p. 1793-1796), etc. No.
- a charge-transporting organic material composed of the above-described charge-transporting substance and charge-accepting dopant substance can also be used.
- the charge transporting organic material is not particularly limited as long as it is dissolved by a solvent.
- an electron accepting dopant substance can be used for the hole transporting substance, and a hole accepting dopant substance can be used for the electron transporting substance. It is also desirable to have a high charge acceptability.
- the charge-transporting oligo-phosphorus generally exhibits a hole-transport property, it is preferable to use an electron-accepting dopant substance as the charge-accepting dopant substance.
- the electron-accepting dopant include strong organic acids such as benzenesulfonic acid, tosylic acid, camphorsulfonic acid, hydroxybenzenesulfonic acid, 5-sulfosalicylic acid, dodecylbenzenesulfonic acid, and polystyrenesulfonic acid.
- Oxidants such as, 7,8,8-tetracyanoquinodimethane (TCNQ), 2,3-dichloro-1,5,6-dicyanone 1,4-benzoquinone (DDQ) is not.
- These electron-accepting dopant materials may be used alone or in combination of two or more.
- both the charge transporting substance and the charge-accepting dopant substance are amorphous solids, but it is necessary to use a crystalline solid as at least one of the substances. After forming the charge transporting varnish, it is preferable to use a material exhibiting amorphous solidity.
- At least one of the charge-transporting substance and the charge-accepting dopant substance is a crystalline solid
- at least one of the substances is preferably a substance having random intermolecular interaction.
- molecular compounds for example, Compounds having three or more different polar functional groups in one molecule are preferred.
- Such a compound examples include, but are not limited to, tyrone, dihydroxybenzenesulfonic acid, and a sulfonic acid derivative represented by the general formula (5). Acid derivatives are preferred. Specific examples of the sulfonic acid derivative 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 12 and R 13 each independently represent a carboxyl group or a hydroxyl group.
- a sulfonic acid derivative represented by the general formula (6) can also be suitably used.
- R "to R 18 each independently represent a hydrogen atom, an unsubstituted or substituted monovalent hydrocarbon group or a halogen atom
- X represents a single bond, indicates 0, S or NH
- A is hydrogen Atom, halogen atom, 0, S, S (O) group, S (0) group, or N, unsubstituted or
- y is an integer that satisfies 1 ⁇ , which is equal to the valence of A, and denotes the number of sulfonic acid groups bonded to the benzene ring portion of the 1,4-benzodioxane skeleton, and l ⁇ x ⁇ 4.
- the lower limit of the charge-accepting dopant substance relative to the charge-transporting substance 1 is usually 0.01, preferably 0.2, and the upper limit is that the charge-transporting substance and the charge-accepting dopant substance are completely dissolved in the solvent. Although it is not particularly limited as long as it is carried out, it is preferable to knead at a mass ratio of 10.
- a good solvent is an organic solvent (a highly soluble solvent) that dissolves a substrate well, and specific examples thereof include N, N-dimethylformamide (153 ° C) and N, N-dimethylacetamide ( 165 ° C), N-methylpyrrolidone (202 ° C), 1,3 dimethyl-2 imidazolidinone (225 ° C) and dimethyl sulfoxide (189 ° C), N cyclohexyl-2-pyrrolidinone (284 ° C), etc.
- the present invention is not limited to these.
- N, N dimethyl acetoamide (165 ° C) and 1,3 dimethyl-2-imidazolidinone (225 ° C) are preferred.
- 1,3 dimethyl-2-imidazolidinone (225 ° C ) Is more preferred.
- the numerical value in parentheses indicates the boiling point below 760 mmHg, and will be similarly described hereinafter.
- the content ratio of the good solvent to the whole solvent used in the varnish is not particularly limited, but is usually 1 to 90% by weight.
- the substrate is dissolved by the good solvent.
- the poor solvent is an organic solvent for adjusting the surface tension, polarity, boiling point, viscosity, and the like of the varnish to improve the wettability to the base material and to impart flatness to the film during firing.
- the addition of the poor solvent has the purpose of adjusting the varnish for wet processes such as spin coating, ink jet, printing and spraying.
- aromatic hydrocarbons benzene (80 ° C), toluene (lie), ethylbenzene (136 ° C), p-xylene (138 ° C), o-xylene (138 ° C), styrene (145 ° C) And the like.
- Ketones include acetone (56 ° C), methyl ethyl ketone (80 ° C), methyl isopropyl ketone (94 ° C), getyl ketone (102 ° C), methyl isobutyl ketone (117 ° C), methyl methyl ketone Examples thereof include butyl ketone (127 ° C), cyclohexanone (155 ° C), and ethyl normal amyl ketone (167 ° C).
- Esters include ethyl acetate (77 ° C), isopropyl ketone (85 ° C), normal propyl acetate (101 ° C), isobutyl acetate (116 ° C), normal butyl acetate (125 ° C), Examples include normal amyl acetate (142 ° C), methyl caproate (151 ° C), 2-methylpentyl acetate (162 ° C), and normal butyl lactate (186 ° C).
- Glycol esters and glycol ethers include ethylene glycol dimethyl ester. 1 ter (85 ° C), propylene glycol monomethyl ether (119 ° C), ethylene glycol monomethyl ether (124 ° C), propylene glycol monoethyl ether (132 ° C), ethylene glycol monomethyl ether ether ( 136 ° C), ethylene glycol monopropyl ether (144 ° C), ethylene glycol methyl ether acetate (145 ° C), propylene glycol monomethyl ether acetate (146 ° C), ethylene glycol monoethyl ether acetate (156 ° C) ° C), diethylene glycol dimethyl ether (162 ° C), propylene glycol monobutyl ether (170 ° C), ethylene glycol monobutylinone ether (171 ° C), diethylene glycol getyl ether (188 ° C), dipropylene glycol monomethyl Ether (189 ° C), diethylene glycol di
- Examples of alcohols include methanol (65 ° C), ethanol (78 ° C), isopropanol (82 ° C), tert-butanol (83 ° C), aryl alcohol (97 ° C), and normal propanol.
- phenols examples include arsol (154 ° C.), phenol (182 ° C.), m-cresol (202 ° C.) and the like.
- ethers and carboxylic acids examples include isopropyl ether (68 ° C.), 1,4-dioxane (10, acetic acid (117 ° C.), and y-butyl lactone (204 ° C.).
- ketones ketones, glycol ethers and alcohols are preferred.
- glycol ethers and alcohols are more preferable.
- the content ratio of the poor solvent to the entire solvent used in the varnish is not particularly limited, but is usually 1 to 90% by weight, preferably 1 to 50% by weight.
- Examples of such a combination include a combination of a good solvent N, N dimethylacetamide, a poor solvent such as normal malpentane, normal hexane, normal octane, and cyclohexane.
- a good solvent and a poor solvent having a boiling point (under 760 mmHg) at least 20 ° C. lower than that of the good solvent are used.
- Suitable solvent compositions include N-methylpyrrolidone (202 ° C), ethylene glycol monobutyl ether (171 ° C), and N, N dimethylformamide (153 ° C). 3 Dimethyl-2 imidazolidinone (225 ° C
- 1,3 dimethyl-12-imidazolidinone (225 ° C) and isobutanol (108 ° C), 1,3 dimethyl-2 imidazolidinone (225 ° C) and cyclohexanol ( 161 ° C), 1,3 dimethyl-2 imidazolidinone (225 ° C) and propylene glycol monoethyl ether (132 ° C) are preferred, and 1,3 dimethyl-2 imidazolidinone (225 ° C) and cyclohexane Xanol (161 ° C.) is more preferred.
- undesirable solvent compositions include N, N-dimethylacetamide (165 ° C), 2 phenoxyethanol (237 ° C), and 1,3 dimethyl-2 imidazolidinone (225 ° C). And jetty render recall (244 ° C). These use a poor solvent having a boiling point higher than that of a good solvent, and have a solvent composition in which it is difficult to suppress the generation of foreign substances.
- a coating film can be formed by applying the varnish of the present invention on a substrate and evaporating the solvent.
- the coating method is not particularly limited, and examples thereof include a dip method, a spin coating method, a transfer printing method, a roll coating method, a brush coating, a spray method, and an inkjet method. Each can form a uniform film.
- the method of evaporating the solvent is not particularly limited, but the solvent is evaporated in a suitable atmosphere, that is, in an atmosphere, an inert gas such as nitrogen, or vacuum using a hot plate, a proximity hot plate or an oven. Is performed to obtain a thin film having a uniform film formation surface.
- the firing temperature is not particularly limited as long as the solvent can be evaporated, but is preferably 40 to 250 ° C. Further, in order to develop high flatness and high uniformity of the thin film, or to allow a reaction to proceed on the substrate, two or more temperature changes may be applied during film formation.
- a thin film having a measured number of deviations of 100 or less when the film thickness is 30 nm is preferable.
- the charge transporting varnish of the present invention it is possible to easily obtain a thin film that satisfies the number of dihethates, even when using a varnish having a solid content of 3.0%, which is more likely to cause foreign substances than solids, Under measurement conditions, a thin film with a number of defetates of 100 or less (thickness: 30 nm) may be obtained.
- Thin films are prepared in a class 100 clean room, and foreign substances are measured in a class 1 clean room.
- the angle and intensity of the light are different from those reflected by the wafer without the diffeatate.
- Observing light having different angles and intensities with a detector is the basic principle of a surface foreign matter inspection device, but the detection of this reflected light is basically stochastic, and the above-mentioned ⁇ 80% "Capture rate" means that at least 80% of the diffeatate on the wafer is observable (ie, the remaining 20% is the area that may not be captured).
- the materials used include, but are not limited to, the following. It is preferable that the electrode substrate to be used is subjected to liquid cleaning with a detergent, alcohol, pure water or the like in advance to be purified, and that the anode substrate is subjected to a surface treatment such as an ozone treatment or an 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 represented 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 (triphenylamine) dimer derivative As a material for forming the hole transporting layer, for example, a (triphenylamine) dimer derivative
- Triarylamines such as (TPD), (a-naphthyldiphenamine) 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-—) 5,5 "-bis ⁇ 4 [bis (4-methylphenyl) amino] phenyl ⁇ -2,2 ': 5', 2" oligos such as tatiofen ( ⁇ -3 ⁇ ) And thiophenes.
- the light-emitting layer may be formed by co-evaporating a material for forming the above-described hole transport layer or a material for forming the following electron transport layer and a light-emitting dopant.
- Examples of the material for forming the electron transport layer include Alq, BAlq, DPVBi, (2- (4-bi
- a material for forming the electron injection layer include lithium oxide (Li 0) and magnesium oxide.
- cathode material examples include aluminum, magnesium-silver alloy, aluminum-lithium alloy, lithium, sodium, potassium, cesium and the like.
- 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 in 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 in 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 cathode and anode materials to be used the same materials as those exemplified for the OLED element can be used.
- the cleaning treatment and the 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)).
- polyphenylene bilen derivatives such as 2,4-phenylene bilen) (MEH-PPV), polythiophene derivatives such as poly (3-alkylthiophene) (PAT), and polyvinyl carbazole (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.
- Phenyltetraaline (hereinafter abbreviated as PTA) shown in formula (7) is Synthesized from p-hydroxydiphenylamine and p-phenylenediamine according to Bulletin of the Chemical Society of Japan, 1994, Vol. 67, pp. 1749-1752. (Yield 85%).
- FIG. 1 shows the results of a surface foreign matter inspection measurement of the charge transporting thin film obtained by forming and firing the varnish of Example 1 on a silicon wafer.
- Fig. 2 shows the results of a surface foreign matter inspection measurement of the charge transporting thin film obtained by depositing and baking the varnish of Comparative Example 1 on a silicon wafer.
- FIG. 3 shows the results of surface foreign substance inspection measurement of the charge transporting thin film obtained by forming the varnish of Comparative Example 2 on a silicon wafer and firing it.
- Fig. 4 shows the results of surface foreign matter inspection measurement of the charge transporting thin film obtained by forming the varnish of Comparative Example 3 on a silicon wafer and firing it.
- Each of the charge transporting thin films was coated on a silicon wafer that had been washed with ozone for 40 minutes by spin coating, and baked at 200 ° C for 60 minutes in air to form a 30 nm thin film. And The silicon wafers were opened in a class 100 clean room and baked consistently in the tallin room.
- the silicon wafer used was a standard product with a diameter of 6 inches, N type, low efficiency of 5 to 7 Qcm, orientation (100), and thickness of 625 ⁇ 25 nm.
- the film thickness was measured using a surface shape measuring device DEKTAK3ST manufactured by Japan Vacuum Engineering Co., Ltd., and Ip was measured using a photoelectron spectrometer AC-2 manufactured by Riken Keiki Co., Ltd.
- the quantification of the foreign substance was measured using a surface foreign substance inspection apparatus Surfscan (trademark) 6220 manufactured by KLA-Tencor.
- the surface foreign matter inspection device detects foreign matter up to 0.5 m at a capture rate of 80%, and sets the conditions for measuring and counting the size.
- the laser beam used was an argon ion laser, focused on a circle with a diameter of 90 m, and the path was scanned directly at high speed with normal incidence on the substrate surface (KLA—Tencor surface foreign matter inspection). No other scanning method can be used on the device Surfscan TM 6220).
- the laser beam illuminates foreign matter on the substrate, the light is scattered in all directions from the point of incidence, and this scattered light is collected by the optical system, guided to a low-noise photomultiplier, doubled, and digitized. Is done.
- Foreign objects that have been digitally delineated are 0.5-0.6, 0.6-0.7, 0.7-0.8, 0.8-0.9, 0.9-1.0, 1. It is classified into 0-3.0, 3.0-5.0, 5.0-28. The total of each count can be measured.
- the upper limit for counting foreign objects was set to 30,000 as the number of defetatates. As described above, since the number of differentials is strictly an optically corrected value, flaws on the substrate other than the foreign matter are also collected. Therefore, the surface foreign matter inspection was performed with great care for the influence of scratches on the substrate, and the data derived from the scratches was excluded.
- Table 1 shows the results of the surface foreign matter inspection measurement of Example 1 and Comparative Example 13.
- Example 1 is a system in which the composition of the mixed solvent is composed of a good solvent and a poor solvent having a boiling point lower than that of the good solvent by at least 20 ° C. (under 76 OmmHg), and the DMI of the good solvent has a boiling point of 225 ° C. At C, the boiling point of the poor solvent c-HexOH is 161 ° C.
- Comparative Example 1 is a system in which the composition of the mixed solvent was composed of a poor solvent having almost the same boiling point (760 mmHg) as that of the good solvent.
- the boiling point of DMAc, a good solvent was 165 ° C and the poor solvent was poor.
- the boiling point of c HexOH is 161 ° C.
- Comparative Examples 2 and 3 are systems in which the composition of the mixed solvent is composed of a good solvent and a poor solvent having a higher boiling point (760 mm Hg) than the good solvent, and Comparative Example 2 shows a boiling point of DMAc of the good solvent. Is 165 ° C, the boiling point of 2-Phet as a poor solvent is 237 ° C, and the boiling point of DMI as a good solvent is 225 ° C and the boiling point of DEG as a poor solvent is 244 ° C in Comparative Example 3.
- FIG. 1 (Example 1) can suppress foreign substances.
- Fig. 3 and Fig. 4 the number of differentials exceeded the upper limit of 30,000.
- Such foreign matter on the charge transporting thin film when used as an organic EL device, causes an electric short circuit, and causes a reduction in yield and production efficiency.
- Examples 2 and 3 and Comparative Example 4 are varnishes prepared by changing only the boiling point of the good solvent.
- a good solvent was DMI with a boiling point of 225 ° C
- a good solvent was NMP with a boiling point of 202 ° C
- a good solvent was a DMAC with a boiling point of 165 ° C.
- c-HexOH having a boiling point of 161 ° C was selected and fixed.
- Table 3 shows the results of the surface foreign matter inspection measurement of Examples 1, 4, 5 and Comparative Example 1.
- Table 4 shows the results of the surface foreign matter inspection measurement of Examples 1, 6, 7, and 8.
- Example 1 it was shown earlier that a good thin film surface was obtained.
- the solvent composition ratios of the good solvent and the poor solvent shown up to now were 4: 6 (wt%) in the ratio of good solvent: poor solvent. It was investigated.
- Example 6 A varnish was prepared in Example 6 with a good solvent: poor solvent of 1: 9, in Example 7 with a good solvent: poor solvent of 7: 3, and in Example 8 with a good solvent: poor solvent of 3: 7. As shown in Table 4, it can be seen that a good thin film surface can be obtained even when the composition ratio of the mixed solvent changes.
- Table 5 shows the results of the surface foreign substance inspection measurement of Examples 9 to 11 and Comparative Examples 5 to 7.
- DMAc with a boiling point of 165 ° C was selected as a good solvent
- the poor solvent a solvent having a ⁇ force of 10,15,17,20,23,28 ° C when the boiling point of DMAc which is a good solvent was fixed at 165 ° C was selected.
- poor pentane, normal hexane, normal octane, normal nonane, cyclohexane, and the like which are poor solvents that are not mixed with the good solvent, were not selected.
- Example 12 the difference in boiling point between the good solvent and the poor solvent ⁇ Foreign matter is generated at 17 ° C, and foreign matter can be suppressed at 20 ° C.
- the threshold value of the boiling point difference between the medium and the poor solvent was found to be 20 ° C.
- Table 6 shows the results of surface foreign substance inspection measurement of the thin film surfaces obtained from the charge transporting varnishes of Comparative Examples 8 to 10.
- Table 7 shows the results of surface foreign matter detection measurement of the thin film surfaces of Comparative Examples 11 to 15 in which the charge-transporting varnish force was also obtained.
- Comparative Examples 11 to 13 are examples composed of only a poor solvent for PTA.
- Comparative Examples 14 and 15 are examples composed of a mixture of two kinds of poor solvents for PTA.
- the varnish of the present invention is based on the premise that the solid content is completely dissolved in the organic solvent.However, in the case where one of the solid components is not dissolved, the roughness of the thin film surface is significantly increased. That helped.
- Comparative Examples 14 and 15 in which a mixed solvent of two kinds of poor solvents was selected as the solvent composition of the conductive varnish, it was found that the roughness of the thin film surface was significantly increased, as in Comparative Example 11 13. In addition, a large number of foreign substances that were too large to be detected in the differential range of the surface foreign substance inspection measurement were visually confirmed. Therefore, it was necessary to use at least one good solvent for the solute when using a mixed solvent.
- a 30-nm hole-transporting thin film was formed on a glass substrate with ITO, and then introduced into a vacuum evaporation apparatus, where a—NPD Alq LiF and Al were added.
- Example 12 An OLED device was fabricated and the characteristics were evaluated in the same manner as in Example 12, except that the charge-transporting varnish of Example 4 was used.
- Example 12 An OLED device was fabricated and evaluated in the same manner as in Example 12, except that the charge-transporting varnish of Example 5 was used.
- An OLED device was fabricated and evaluated in the same manner as in Example 12, except that the charge-transporting varnish of Comparative Example 1 was used.
- An OLED device was prepared and the characteristics were evaluated in the same manner as in Example 12, except that the charge-transporting varnish of Comparative Example 2 was used.
- An OLED device was prepared in the same manner as in Example 12, except that the charge-transporting varnish of Comparative Example 3 was used, and the characteristics were evaluated.
- the characteristics of the obtained OLED device were evaluated.
- An aqueous solution of polyethylene dioxythiophene polystyrene snorenoic acid was applied onto an ITO glass substrate by a spin coating method, and baked in air at 120 ° C. for 1 hour to obtain a 30 nm thin film.
- an OLED device was fabricated by the method described in Example 12, and the device characteristics of the OLED were evaluated.
- Table 8 shows the characteristics, Ip, and conductivity of the OLED elements of Examples 12 to 14 and Comparative Examples 16 to 20. You. The characteristics of the OLED device showed the voltage, luminance, and luminous efficiency when the light emission starting voltage or 10 mAZcm 2 and 50 mAZcm 2 were set as thresholds.
- the characteristics of the OLED element were measured using an organic EL luminous efficiency measuring device (EL1003, manufactured by Precise Gage).
- the foreign matter on the substrate that causes an electric short-circuit significantly appears in the luminous efficiency.
- charge concentration occurs at the foreign matter part, and the current is injected, so that the luminous efficiency is reduced.
- the luminous efficiency is good in the charge transporting thin film with few foreign substances.
- the light emitting efficiency of the twelfth example using the thin film having a reduced number of defetatates was improved by about 2 to 3 cdZA compared to Comparative Examples 17 and 18 using the thin film having a very large number of defetatates. did. Note that the light emitting surface of the OLED element of Example 12 emitted uniform light, whereas the light emitting surfaces of Comparative Examples 17 and 18 emitted uneven light.
- Examples 13 and 14 which are thin-film OLED devices in which a varnish force was also prepared by using PGME as a poor solvent and a mixed solvent, also emitted uniform light.
Abstract
Description
Claims
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CN200580017389XA CN1961615B (zh) | 2004-04-30 | 2005-04-28 | 含良溶剂及不良溶剂的清漆 |
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EP05736641.1A EP1773102B1 (en) | 2004-04-30 | 2005-04-28 | Varnish containing good solvent and poor solvent |
US11/579,066 US9251923B2 (en) | 2004-04-30 | 2005-04-28 | Varnish containing good solvent and poor solvent |
KR1020067022052A KR101197492B1 (ko) | 2004-04-30 | 2005-04-28 | 양용매 및 빈용매를 함유하는 니스 |
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- 2005-04-28 KR KR1020067022052A patent/KR101197492B1/ko active IP Right Grant
- 2005-04-28 WO PCT/JP2005/008118 patent/WO2005107335A1/ja active Application Filing
- 2005-04-28 JP JP2006512829A patent/JP4662073B2/ja active Active
- 2005-04-28 US US11/579,066 patent/US9251923B2/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
EP1773102A1 (en) | 2007-04-11 |
KR101197492B1 (ko) | 2012-11-09 |
US9251923B2 (en) | 2016-02-02 |
CN1961615B (zh) | 2012-01-11 |
CN1961615A (zh) | 2007-05-09 |
KR20070015548A (ko) | 2007-02-05 |
EP1773102A4 (en) | 2009-11-11 |
TWI399415B (zh) | 2013-06-21 |
EP1773102B1 (en) | 2019-06-19 |
US20070205400A1 (en) | 2007-09-06 |
JP4662073B2 (ja) | 2011-03-30 |
TW200604304A (en) | 2006-02-01 |
JPWO2005107335A1 (ja) | 2008-03-21 |
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