WO2013088974A1 - 硬化性組成物、硬化物及びそれを用いた有機電界発光素子 - Google Patents
硬化性組成物、硬化物及びそれを用いた有機電界発光素子 Download PDFInfo
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- WO2013088974A1 WO2013088974A1 PCT/JP2012/081062 JP2012081062W WO2013088974A1 WO 2013088974 A1 WO2013088974 A1 WO 2013088974A1 JP 2012081062 W JP2012081062 W JP 2012081062W WO 2013088974 A1 WO2013088974 A1 WO 2013088974A1
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- DOUAFMIJGIUWJX-UHFFFAOYSA-N O=Cc(cc1)ccc1N(c1ccccc1)c1ccc(C=O)cc1 Chemical compound O=Cc(cc1)ccc1N(c1ccccc1)c1ccc(C=O)cc1 DOUAFMIJGIUWJX-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- H10K50/15—Hole transporting layers
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- C08F226/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen
- C08F226/06—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a heterocyclic ring containing nitrogen
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- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
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- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/22—Di-epoxy compounds
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- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/04—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers only
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
- C08K5/3415—Five-membered rings
- C08K5/3417—Five-membered rings condensed with carbocyclic rings
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
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- 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
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- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
- H10K85/6572—Polycyclic condensed heteroaromatic hydrocarbons comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
Definitions
- the present invention relates to a curable composition containing an indolocarbazole skeleton compound having a polymerizable group and a crosslinkable compound having two polymerizable groups, a cured product, and an organic electroluminescent device using the same.
- electroluminescent elements include inorganic electroluminescent elements using inorganic compounds and organic electroluminescent elements using organic compounds.
- organic light emitting devices with low voltage and high luminance can be obtained. Research on practical application of electroluminescent devices is actively conducted.
- the structure of the organic electroluminescence device is that a hole injection layer is formed on a glass plate on which a thin film of an anode material such as indium-tin oxide (ITO) is deposited, and an organic thin film layer such as a light emitting layer is further formed thereon.
- a device is formed by forming a thin film of a cathode material, and there is an element in which a hole transport layer and an electron transport layer are appropriately provided in this basic structure.
- the layer structure of the organic electroluminescent device is, for example, anode / hole injection layer / light emitting layer / electron transport layer / cathode, anode / hole injection layer / hole transport layer / light emitting layer / electron transport layer / cathode, etc. is there.
- Hole transport materials used for the hole transport layer of the organic electroluminescence device are roughly classified into low molecular weight hole transport materials and high molecular weight hole transport materials.
- a vacuum deposition method is mainly used.
- various materials having different functions can be easily multilayered.
- high-performance organic electroluminescent elements can be formed, it is difficult to uniformly control the film thickness and paint separately due to the large screen and high definition of the panel. There is a problem of becoming higher.
- a solution coating method such as a spin coating method, a printing method, an ink jet method or the like is used. Although this method is easy to enlarge and is excellent in mass production, mixing between layers is likely to occur, functional separation by lamination is not possible, and there are necessary characteristics different from dry methods such as solubility in solvents. In addition, there is a problem that the charge injection material and the charge transport material that can be used in the wet method are limited.
- Patent Document 1 reports an acrylic compound or a cured product thereof
- Patent Document 2 reports a cured product using an NPD having a vinyl group.
- organic electroluminescent devices using these compounds although functional separation is achieved by stacking, electron resistance and charge transport performance are not sufficient, and sufficient characteristics have not been obtained.
- Patent Document 3 discloses a conjugated polymer bonded at the 6th and 12th positions of indolocarbazole
- Patent Document 4 discloses a conjugated polymer having N-substituted indolocarbazole as the main skeleton.
- the present invention has been made in view of the above problems, and has a curable composition containing an indolocarbazole skeleton compound having two polymerizable groups for an organic electroluminescent device applicable to a wet process with high luminous efficiency. It aims at providing a thing and its hardened
- cured material. Another object of the present invention is to provide an organic electroluminescence device using the curable composition or a cured product thereof used for a lighting device, an image display device, a backlight for a display device, and the like.
- the present inventors have intensively studied, and as a result, a curable composition containing an indolocarbazole skeleton compound having one polymerizable group and a crosslinkable compound having two polymerizable groups, By using the cured product, it has been found that an organic layer containing other materials can be laminated on the upper layer by coating, and the light emission performance is improved, and the present invention has been completed.
- the present invention relates to a curable composition containing an indolocarbazole skeleton compound having one polymerizable group and a crosslinkable compound having two polymerizable groups, a cured product, and an anode layer and a cathode laminated on a substrate.
- the present invention relates to an organic electroluminescent device having an organic layer between layers, wherein at least one of the organic layers is a layer containing the curable composition or cured product.
- ring A represents a heterocycle represented by the formula (1a) fused with an adjacent ring at an arbitrary position
- R represents a hydrogen atom, a C 1 -C 20 alkyl group, or a C 1 -C 20 alkoxy group.
- Y 1 represents a single bond or a divalent group
- W 1 is a polymerizable group
- Z 1 represents a C 6 -C 30 aryl group, a C 3 -C 30 heteroaryl group or a C 12 -C 60 diarylamino group.
- Y 3 represents a single bond or a divalent group
- W 2 is a polymerizable group
- two W 2 s may be the same or different.
- Y 3 preferably has no condensed ring structure of 5 or more rings.
- Preferable examples of the compound represented by the general formula (1) include compounds represented by the following formula (3) or (4).
- formulas (3) and (4) Y 1 , W 1 and Z 1 are the same as in general formula (1), and R 1 is the same as R in general formula (1).
- the polymerizable groups W 1 and W 2 in the general formulas (1) and (2) are preferably a radical polymerizable group or a cationic polymerizable group.
- the polymerizable groups W 1 and W 2 are preferably at least one group selected from a vinyl group, a vinyl group substituted with an alkyl group having 1 to 6 carbon atoms, an epoxy group, and an oxetanyl group.
- the polymerizable groups W 1 and W 2 are vinyl groups selected from a vinyl group and a substituted vinyl group, and the compound represented by the general formula (1) has one vinyl group, and the general formula ( It is preferable that the compound represented by 2) has two vinyl groups.
- the compounds represented by the general formula (1) and the general formula (2) preferably have no polymerizable group other than the polymerizable group represented by W 1 or W 2 , and are represented by the general formula (1).
- the number of polymerizable groups in the compound is preferably 1, and the number of polymerizable groups in the compound represented by the general formula (2) is preferably 2.
- another aspect of the present invention relates to a cured product obtained by polymerizing and curing the curable composition. Since the curable composition contains a compound represented by the general formula (1) and a compound represented by the general formula (2), a cured product obtained by polymerizing and curing the curable composition is represented by the general formula (1). ) And a compound represented by the general formula (2).
- another aspect of the present invention is an organic electroluminescent device having an organic layer between an anode layer and a cathode layer laminated on a substrate, wherein the cured product is contained in at least one layer of the organic layer.
- the present invention relates to a characteristic organic electroluminescence device.
- a hole transport layer is mentioned as an organic layer containing the said hardened
- the curable composition of the present invention and the cured product thereof contain an indolocarbazole skeleton having two polymerizable groups capable of imparting excellent charge transport ability, particularly hole transport ability.
- the curable composition of the present invention contains an indolocarbazole skeleton compound (also referred to as an indolocarbazole compound) having a polymerizable group represented by the general formula (1).
- the indolocarbazole skeleton is formed by taking one H at the N position from a five-ring condensed ring compound in which an indole ring and a carbazole ring are condensed. Since this skeleton has a plurality of condensable positions of the indole ring and the carbazole ring, it can take groups of six structural isomers of the following formulas (A) to (F). There may be.
- the indolocarbazole skeleton can have a substituent as long as the effects of the present invention are not inhibited.
- the ring A represents a heterocyclic ring represented by the formula (1a) that is condensed at an arbitrary position with an adjacent ring.
- the structure has any one of the above formulas (A) to (F).
- Z 1 in the formula (1a) is bonded to N ⁇ .
- R is a hydrogen atom, a C 1 -C 20 alkyl group, a C 1 -C 20 alkoxy group, a C 6 -C 30 aryl group, a C 6 -C 30 aryloxy group, C 7 -C 36 arylalkyl group, C 7 -C 36 arylalkyloxy group, C 3 -C 30 heteroaryl group, C 3 -C 30 heteroaryloxy group, C 4 -C 36 heteroaryl Represents an alkyl group, a C 4 -C 36 heteroarylalkyloxy group or a C 3 -C 30 cycloalkyl group, which may be the same or different;
- a hydrogen atom, a C 1 -C 20 alkyl group, a C 1 -C 20 alkoxy group, a C 6 -C 30 aryl group, a C 3 -C 30 heteroaryl group, or a C 3 -C 30 cyclo group is preferred.
- alkyl group more preferably a hydrogen atom, a C 1 -C 8 alkyl group, a C 1 -C 8 alkoxy group, a C 6 -C 18 aryl group, a C 3 -C 18 heteroaryl group, or a C 1 A 3 to C 12 cycloalkyl group.
- These groups may further have a substituent as long as the performance is not adversely affected.
- the carbon number is included in the calculation of the carbon number.
- alkyl group examples include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, and a decyl group, preferably a methyl group, an ethyl group, and a propyl group.
- an alkyl group having 1 to 8 carbon atoms such as a group, a butyl group, a pentyl group, a hexyl group, a heptyl group, or an octyl group.
- the alkyl chain may be linear or branched.
- alkoxy group examples include methyloxy group, ethyloxy group, propyloxy group, butyloxy group, pentyloxy group, hexyloxy group, heptyloxy group, octyloxy group, nonyloxy group, decyloxy group, preferably methyl
- alkyloxy groups having 1 to 8 carbon atoms such as oxy group, ethyloxy group, propyloxy group, butyloxy group, pentyloxy group, hexyloxy group, heptyloxy group, and octyloxy group.
- the alkyl chain may be linear or branched.
- aryl group and heteroaryl group include benzene, pentalene, indene, naphthalene, azulene, heptalene, octalene, indacene, acenaphthylene, phenalene, phenanthrene, anthracene, tridene, fluoranthene, acephenanthrylene, acanthrylene, and triphenylene.
- R when R is an aryl group or a heteroaryl group, it may have an indolocarbazole skeleton represented by the above formulas (A) to (F), but it may not have, and more than 5 rings It is desirable not to have the fused ring structure.
- the number to be linked is preferably 2 to 10, more preferably 2 to 7, and the linked aromatic rings may be the same. It may be different. In that case, the position of the bond is not limited, and it may be the ring at the end of the linked aromatic ring or the ring at the center.
- the aromatic ring is a generic term for an aromatic hydrocarbon ring and an aromatic heterocyclic ring. When the linked aromatic ring contains at least one heterocycle, it is included in the heteroaryl group.
- a monovalent group generated by removing hydrogen from an aromatic compound in which a plurality of aromatic rings are connected is represented by the following formula, for example.
- Ar 3 to Ar 8 represent a substituted or unsubstituted aromatic ring.
- arylalkyl group and heteroarylalkyl group include groups in which the alkyl group is linked to the aryl group or heteroaryl group.
- aryloxy group arylalkyloxy group, heteroaryloxy group, and heteroarylalkyloxy group
- aryloxy group arylalkyloxy group, heteroaryloxy group, and heteroarylalkyloxy group
- heteroarylalkyloxy group include a group in which an oxy group is linked to the aryl group, arylalkyl group, heteroaryl group, or heteroarylalkyl group. Is mentioned.
- cycloalkyl group examples include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, and a methylcyclohexyl group, and preferably a cyclopentyl group, a cyclohexyl group, or a methylcyclohexyl group.
- a cyclopropyl group a cyclobutyl group
- a cyclopentyl group a cyclohexyl group
- a cycloheptyl group a cyclooctyl group
- methylcyclohexyl group preferably a cyclopentyl group, a cyclohexyl group, or a methylcyclohexyl group.
- Y 1 represents a single bond or a divalent group, and may be the same or different.
- the divalent group there is a group represented by-(Z 2 ) m- (X) n- (Z 3 ) p- (X) q- , where Z 2 and Z 3 are alkylene and arylene. Or heteroarylene, X is O, COO, S, CONH, CO or the like, and m, n, p, and q are numbers from 0 to 3.
- Z 2 and Z 3 are C 1 -C 20 alkylene groups, C 6 -C 30 arylene groups, C 3 -C 30 heteroarylene groups, and X is CO, COO or O.
- Y 1 is preferably a single bond, a C 1 -C 8 alkylene group, a C 6 -C 12 arylene group, a C 3 -C 12 heteroarylene group, CO, COO or O.
- Y 1 preferably does not have a condensed ring structure of 5 or more rings.
- alkylene group examples include a methylene group, an ethylene group, a propylene group, a butylene group, a pentylene group, a hexylene group, a heptylene group, an octylene group, a nonylene group, and a decylene group, preferably a methylene group, an ethylene group, and a propylene group.
- alkylene groups having 1 to 8 carbon atoms such as a group, butylene group, pentylene group, hexylene group, heptylene group and octylene group.
- the alkylene chain may be linear or branched.
- arylene group and heteroarylene group include groups generated by removing two hydrogens from the aromatic ring exemplified for the R aryl group and heteroaryl group or an aromatic compound in which a plurality of these aromatic rings are connected. .
- Z 1 represents a C 6 -C 30 aryl group, a C 3 -C 30 heteroaryl group or a C 12 -C 60 diarylamino group.
- the C 6 -C 30 aryl group and the C 3 -C 30 heteroaryl group are the same as the C 6 -C 30 aryl group and the C 3 -C 30 heteroaryl group described above for R. Groups.
- Examples of the C 12 -C 60 diarylamino group include groups represented by Ar 1 Ar 2 N—, and Ar 1 and Ar 2 are preferably the C 6 -C 30 aryl groups described above for R. As mentioned.
- Y 3 represents a single bond or a divalent group
- W 2 represents a polymerizable group
- the two polymerizable groups may be the same or different.
- Y 3 represents a C 6 to C 18 divalent aryl group, a C 3 to C 18 divalent heteroaryl group, a C 6 to C 18 divalent arylamino group, or a C 3 to C 18 2 It preferably has a valent heteroarylamino group inside. Further, it preferably has a group having a hole transporting property inside.
- a preferable compound is a compound represented by the general formula (2a).
- V 1 is a C 6 -C 30 divalent aryl group, C 3 -C 30 divalent heteroaryl group, C 6 -C 30 divalent arylamino group (> NAr: Ar represents a divalent hetero arylamino group an aryl group) or a C 3 ⁇ C 30, Y 2 is a single bond or a divalent bridging group, if V 1, Y 2 contains more than one is They may be the same or different.
- W 2 is a polymerizable group, and two W 2 may be the same or different.
- r represents an integer of 1 to 6, preferably 1 to 4.
- V 1 and Y 2 preferably do not have a condensed ring structure of 5 or more rings.
- V 1 has a C 6 -C 30 aryl group, a C 3 -C 30 heteroaryl group, a C 6 -C 30 arylamino group, or a C 3 -C 30 heteroarylamino group as a substituent.
- the C 6 -C 30 aryl group and the C 3 -C 30 heteroaryl group may have a linked structure.
- Y 2 represents a divalent bridging group
- a divalent bridging group, W 2 and V 1, or when r is 2 is a group linking the two V 1 have the same group as V 1
- a divalent aryl group, a C 3 -C 30 divalent heteroaryl group, a C 6 -C 30 divalent arylamino group, or a C 3 -C 30 2 This is a group having no valent heteroarylamino group.
- Examples of Y 2 include a single bond, an alkylene group, O, COO, S, CONH, CO, or a combination thereof, and a single bond, an alkylene group, a COO group, or a combination thereof is preferable.
- V 1 is preferably a C 6 to C 24 divalent aryl group, a C 3 to C 24 divalent heteroaryl group, a C 6 to C 24 divalent arylamino group, or A C 3 to C 24 divalent heteroarylamino group, more preferably a C 6 to C 18 divalent aryl group, and a C 3 to C 18 divalent heteroaryl group C 6 to C 18 2 A divalent arylamino group or a C 3 -C 18 divalent heteroarylamino group.
- the divalent arylamino group or the divalent heteroarylamino group is a divalent amino group represented by —N (Ar) —.
- Ar represents a monovalent aryl group or heteroaryl group.
- V 1 is a divalent aryl group or a divalent heteroaryl group
- the aromatic group exemplified for R in the general formula (1) the aromatic ring exemplified for the heteroaryl group, or a fragrance in which a plurality of these aromatic rings are connected And a group formed by removing two hydrogens from a group compound.
- V 1 is an arylamino group or a heteroarylamino group
- the aryl group or heteroaryl group is the same as the aryl group and heteroaryl group described for R in the general formula (1).
- it is preferable that V 1 does not have a condensed ring structure having 5 or more rings.
- W 1 and W 2 represent a polymerizable group, which is a polymerizable group that can be polymerized by light, heat, a catalyst, or the like.
- this polymerizable group include a radical polymerizable group and a cationic polymerizable group.
- the radical polymerizable group is preferably a vinyl group or a substituted vinyl group substituted with an alkyl group having 1 to 6 carbon atoms, more preferably a vinyl group selected from a vinyl group and a substituted vinyl group.
- R 1 , R 2 and R 3 are hydrogen, a C1-6 alkyl group or a phenyl group, preferably hydrogen or a C1-3 alkyl group.
- a cyclic ether group such as an epoxy group or an oxetane group is preferable.
- These cyclic ether groups may have a substituent, and examples of the substituent include an alkyl group having 1 to 6 carbon atoms.
- W 2 is the same as W 1 in the general formula (1), but does not have to be the same polymerizable group. However, it is preferably a copolymerizable group.
- the compound represented by the general formula (2) is preferably a charge transporting compound having a polymerizable group.
- the compound represented by the formula (3) or (4) is exemplified as a preferred compound.
- Y 1 , W 1 and Z 1 are the same as those in general formula (1), and R 1 is the same as R in general formula (1).
- the compound represented by the general formula (2) is further converted into the total number of moles of the compound represented by the general formula (1) and the compound represented by the general formula (2).
- it is 100 mol, it can be contained in an amount of 10 to 90 mol.
- the compound represented by the general formula (2) is preferably contained in the range of 10 to 70 mol.
- the mobility and crosslink density of the carrier can be adjusted by making the cured composition and cured product of the present invention a mixture of the compound of the general formula (1) and the compound represented by the general formula (2). Further, if necessary, a curable composition may be prepared by mixing a copolymerizable compound, a general organic solvent such as toluene or THF, and various polymerization catalysts such as AIBN, BPO, and phosphotungstic acid.
- a general organic solvent such as toluene or THF
- various polymerization catalysts such as AIBN, BPO, and phosphotungstic acid.
- a compound having an indolocarbazole skeleton having one polymerizable group represented by the general formula (1) of the present invention can be easily produced by a known method.
- a compound having a vinyl group can be produced by the following reaction formula.
- the compound having a polymerizable group represented by the general formula (2) of the present invention can be easily produced by a known method in addition to a vinyl compound such as commercially available divinylbenzene or an acrylic compound.
- a compound having a vinyl group can be produced by the following reaction formula.
- the curable composition of the present invention only needs to contain the compound of the general formula (1) and the compound of the general formula (2), and melts or dissolves in a solvent, spin coating method, ink jet method, printing method, spraying.
- a film is formed by a coating method such as a coating method or a dispenser method, and a cured product obtained by crosslinking or curing with heat, light, a catalyst or the like as it is or after removing a solvent by drying.
- the cured product can be easily cured by a known method.
- a compound represented by the general formula (1) is added to toluene, anisole, THF or the like.
- a dissolved film insoluble in a solvent having a crosslinked structure can be obtained by dissolving in an arbitrary solvent, forming a film by a spin coating method, and then heating the substrate with a hot plate under anaerobic conditions.
- the temperature and curing time can be adjusted, and if necessary, a catalyst corresponding to the polymerizable group can be added. Can be cured.
- a catalyst corresponding to the polymerizable group can be added. Can be cured.
- the polymerizable group be copolymerizable. In this case, it is advantageous to use the same polymerizable group.
- the curable composition and the cured product of the present invention give an excellent organic electroluminescence device by being contained in the organic layer of the organic EL device.
- at least one organic layer selected from a light emitting layer, a hole transport layer, an electron transport layer, and a hole blocking element layer may be contained. More preferably, it may be contained as a material for the hole transport layer.
- the organic electroluminescent device using the curable composition and the cured product of the present invention has a plurality of organic layers between a pair of an anode and a cathode, particularly a hole transport layer / light-emitting layer / electron transport layer, hole transport. It is preferably composed of a layer / light emitting layer / electron transport layer or a hole transport layer / light emitting layer / electron transport layer. Particularly preferred is a layer structure of hole transport layer / light emitting layer / electron transport layer.
- the organic electroluminescent element of this invention can also provide a protective layer in each after forming each organic layer. Furthermore, a protective film may be provided to protect the entire element from moisture and oxygen.
- the light emitting layer is a layer containing a light emitting material and may be fluorescent or phosphorescent. Alternatively, a light emitting material may be used as a dopant and a host material may be used in combination.
- a light emitting material may be used as a dopant and a host material may be used in combination.
- the fluorescent light emitting material compounds known in various literatures and compounds shown below can be used, but are not limited thereto.
- the phosphorescent material preferably contains an organometallic complex containing at least one metal selected from ruthenium, rhodium, palladium, silver, rhenium, osmium, iridium, platinum and gold.
- organometallic complexes are known in the above-mentioned patent documents and the like, and these can be selected and used.
- Phosphorescent materials for obtaining high luminous efficiency include complexes such as Ir (ppy) 3 having a precious metal element such as Ir as a central metal, complexes such as Ir (bt) 2 ⁇ acac 3 , and PtOEt 3 Complexes are mentioned. Specific examples of phosphorescent light emitting materials are shown below, but are not limited thereto.
- an organic electroluminescent device having various emission wavelengths can be obtained.
- the amount contained in the light emitting layer is preferably in the range of 0.1 to 50% by weight. More preferably, it is 1 to 30% by weight.
- the host material in the light emitting layer a known host material can be used, and the cured product of the present invention can also be used as the host material. Moreover, you may use together the hardened
- a known host compound that can be used is preferably a compound that has a hole transporting ability and an electron transporting ability, prevents a long wavelength of light emission, and has a high glass transition temperature.
- host materials are known from a large number of patent documents and can be selected from them.
- Specific examples of host materials are not particularly limited, but include indole derivatives, carbazole derivatives, triazole derivatives, oxazole derivatives, oxadiazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives, pyrazolone derivatives, phenylenediamine.
- arylamine derivatives amino-substituted chalcone derivatives, styrylanthracene derivatives, fluorenone derivatives, hydrazone derivatives, stilbene derivatives, silazane derivatives, aromatic tertiary amine compounds, styrylamine compounds, aromatic dimethylidene compounds, porphyrin compounds, anthraquino Heterocyclic tetracarboxylic acid anhydrides such as dimethane derivatives, anthrone derivatives, diphenylquinone derivatives, thiopyran dioxide derivatives, naphthalene perylene,
- metal complexes typified by metal complexes of Russianine derivatives, 8-quinolinol derivatives, metal phthalocyanines, metal complexes of benzoxazole and benzothiazole derivatives, polysilane compounds, poly (N-vinylcarbazole) derivatives, aniline copolymers, Examples thereof include polymer compounds such
- the hole transporting compound for forming the positive hole transporting layer the cured product of the present invention is advantageously used.
- one or two or more low molecular hole transport compounds such as triphenylamine derivatives and carbazole derivatives of tertiary amines may be used as additives within a range not impairing the object of the present invention. You may mix
- Examples of the electron transport compound that forms the electron transport layer include oxadiazole derivatives, imidazole derivatives, and triazole derivatives. If necessary, one or two or more low molecular electron transport compounds may be blended as additives and used as a composition within a range not impairing the object of the present invention. Specific examples of the electron transporting compound are shown below, but are not limited thereto.
- a hole injection layer may be inserted between the anode and the hole transport layer or the light emitting layer.
- a hole injection material for forming the hole injection layer conductive polymers such as polythiophene derivatives and polypyrrole derivatives can be used. Of these, poly (3,4-ethylenedioxythiophene) / polystyrene sulfonic acid (PEDOT / PSS), which is a polythiophene derivative, is preferable from the viewpoint of hole injection efficiency.
- the thickness is preferably 200 nm or less, more preferably 100 nm or less.
- the soot anode supplies holes to a hole injection layer, a hole transport layer, a light emitting layer or the like, and is generally formed on a glass substrate.
- the anode material used in the present invention is not particularly limited, and specific examples include conductive metal oxides such as indium-tin oxide (ITO) and tin oxide, and metals such as gold, silver, and platinum.
- ITO indium-tin oxide
- tin oxide such as gold, silver, and platinum.
- Commercially available glass with ITO can also be used.
- Commercially available glass with ITO is usually used after cleaning with a cleaning agent aqueous solution and a solvent, and then cleaning with a UV ozone irradiation device or a plasma irradiation device.
- the cathode supplies electrons to the electron transport layer or the light emitting layer
- the anode material used in the present invention is not particularly limited.
- metals such as Li, Mg, Ca, Al and alloys thereof,
- Mg—Ag alloy, Mg—Al alloy and the like can be mentioned.
- the cathode and anode can be formed by a known method, that is, vacuum deposition or sputtering.
- the thickness of the cathode is preferably 300 nm or less, more preferably 200 nm or less, while the thickness of the anode is preferably 200 nm or less, more preferably 100 nm or less.
- a spin coating method is generally used as a method for forming a polymer layer such as a polymer light-emitting material, a polymer material for a hole transport layer, or a polymer material for an electron transport layer.
- a spin coating method is generally used as a method for forming a polymer layer such as a polymer light-emitting material, a polymer material for a hole transport layer, or a polymer material for an electron transport layer.
- examples of the method for forming the organic polymer layer include, but are not limited to, an inkjet method, a printing method, a spray coating method, and a dispenser method.
- Synthesis example 1 Synthesis of Compound (C-2) Compound (A-1) is prepared, and compound (C-2) is synthesized according to the following scheme (S1).
- Example 1 Solvent-cleaned, UV ozone-treated glass substrate with ITO having a film thickness of 150 nm, poly (3,4-ethylenedioxythiophene) / polystyrene sulfonic acid (PEDOT / PSS) as a hole injection layer: (HCC Stark) Co., Ltd., trade name: Clevios PCH8000) was formed to a film thickness of 25 nm.
- compound (C-2) and BBPPA compound 9: bis (4-vinylphenyl) phenylamine
- BBPPA 5: 5 (molar ratio).
- the mixture was dissolved in tetrahydrofuran to prepare a 0.4 wt% solution, and a film having a thickness of 20 nm was formed as a hole transport layer by spin coating.
- the solvent was removed with a hot plate at 150 ° C. for 3 hours under anaerobic conditions, followed by heating and curing.
- tris (2- (p-tolyl) pyridine) iridium (III) as a light emitting layer dopant and 4,4′-bis (9H-carbazol-9-yl) as a light emitting layer host Biphenyl was co-deposited so that the dopant concentration was 0.6 wt%, and a 40 nm light emitting layer was formed.
- Alq 3 was formed to a thickness of 35 nm and LiF / Al was formed to a thickness of 170 nm as a cathode, and this element was sealed in a glove box to produce an organic electroluminescent element.
- the organic electroluminescence device When an external power source was connected to the organic electroluminescence device thus obtained and a DC voltage was applied, it was confirmed that the organic electroluminescence device had the light emission characteristics as shown in Table 1.
- the luminance shown in Table 1 is a value at 20 mA / cm 2 .
- the maximum wavelength of the device emission spectrum was 550 nm, and green emission derived from an iridium complex was observed.
- Example 2 Solvent-cleaned, UV ozone-treated glass substrate with ITO having a film thickness of 150 nm, poly (3,4-ethylenedioxythiophene) / polystyrene sulfonic acid (PEDOT / PSS) as a hole injection layer: (HCC Stark) Co., Ltd., trade name: Clevios PCH8000) was formed to a film thickness of 25 nm.
- a mixture mixed at a ratio of compound (C-2): BBPPA 5: 5 (molar ratio) was dissolved in tetrahydrofuran to prepare a 0.4 wt% solution, and 20 nm as a hole transport layer was formed by spin coating.
- thermosetting film is a film having a crosslinked structure and is insoluble in a solvent.
- This thermosetting film is a hole transport layer (HTL).
- tris (2- (p-tolyl) pyridine) iridium (III) is used as the light emitting layer dopant, and 4,4′-bis (9H-carbazol-9-yl) biphenyl is used as the light emitting layer host.
- a 1 wt% solution was prepared by dissolving in toluene so as to be 6 wt%, and a 40 nm film was formed as a light emitting layer by spin coating.
- Example 3 A device was fabricated in the same manner as in Example 2, except that the following compound (A-3) was used instead of compound (C-2) and BOPC (compound 7) was used instead of BBPPA. ,evaluated. Compound (A-3) was synthesized according to the method shown in Synthesis Example 1.
- Example 4 In Example 2, a device was produced and evaluated in the same manner as in Example 2 except that the following compound (A-4) was used. Compound (A-4) was synthesized according to the method shown in Synthesis Example 1.
- a device was prepared and evaluated in the same manner as in Example 2 except that ultraviolet rays were irradiated for 90 seconds using a UV irradiating apparatus, photopolymerized and cured.
- NPD N, N′-di-naphthaleyl-N
- BBPPA 5: 5 (molar ratio)
- N′-diphenyl-1,1′-biphenyl-4,4′-diamine was prepared and evaluated in the same manner as in Example 2.
- Table 1 shows the compounds used in the positive hole transport layer (HTL), the film formation method of the light emitting layer, and the element evaluation results.
- Example 1 and Comparative Example 1 a device in which a hole transport layer is formed by a wet process using the curable composition of the present invention and a light emitting layer is formed thereon by a dry process exhibits excellent device characteristics. I understand that. Further, from Examples 2 to 4 and Comparative Examples 2 to 4, the hole transport layer was formed by a wet process using the curable composition of the present invention, and the light emitting layer of the adjacent layer was further formed by a wet process However, it can be seen that it can be suitably laminated and exhibits good emission characteristics.
- the curable composition and the cured product of the present invention for the organic layer of the organic electroluminescence device, the hole injection property, electron resistance, and charge transport property are improved and the light emission efficiency is excellent. Moreover, since it can laminate
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Abstract
Description
ここで、環Aは隣接環と任意の位置で縮合する式(1a)で表される複素環を表し、Rは水素原子、C1~C20のアルキル基、C1~C20のアルコキシ基、C6~C30のアリール基、C6~C30のアリールオキシ基、C7~C36のアリールアルキル基、C7~C36のアリールアルキルオキシ基、C3~C30のヘテロアリール基、C3~C30のヘテロアリールオキシ基、C4~C36のヘテロアリールアルキル基、C4~C36のヘテロアリールアルキルオキシ基又はC3~C30のシクロアルキル基を表し、同一であっても異なっていてもよい。Y1は単結合、又は2価の基を表し、W1は重合性基である。Z1はC6~C30のアリール基、C3~C30のヘテロアリール基又はC12~C60のジアリールアミノ基を表す。
式(3)、(4)中、Y1、W1、Z1は一般式(1)と同意であり、R1は一般式(1)のRと同意である。
インドロカルバゾール骨格は、インドール環とカルバゾール環が縮合した5環の縮合環化合物からN位のHを1つとって生じるものである。この骨格は、インドール環とカルバゾール環との縮合可能な位置が複数存在するため、下記式(A)~(F)の6種類の構造異性体の基をとり得るが、いずれの構造異性体であってもよい。インドロカルバゾール骨格は、本発明の効果を阻害しない範囲で、置換基を有することができる。
ここで、V1はC6~C30の2価のアリール基、C3~C30の2価のヘテロアリール基、C6~C30の2価のアリールアミノ基(>NAr:ここで、Arはアリール基)又はC3~C30の2価のヘテロアリールアミノ基を表し、Y2は単結合、又は2価の架橋基を表し、V1、Y2が2つ以上含まれる場合は同一であっても異なっていてもよい。W2は重合性基であり、2つのW2は同一であっても異なっていてもよい。rは1~6、好ましくは1~4の整数を表す。なお、V1、Y2は5環以上の縮合環構造を有しないこと好ましい。また、V1は、C6~C30のアリール基、C3~C30のヘテロアリール基、C6~C30のアリールアミノ基又はC3~C30のヘテロアリールアミノ基を置換基として有してもよく、C6~C30のアリール基、C3~C30のヘテロアリール基は連結した構造であってもよい。Y2が2価の架橋基である場合、2価の架橋基は、W2とV1、又はrが2の場合は2つのV1を結合させる基であり、V1と同じ基を有しないものであればよく、好ましくは内部に2価のアリール基、C3~C30の2価のヘテロアリール基、C6~C30の2価のアリールアミノ基又はC3~C30の2価のヘテロアリールアミノ基を有しない基である。Y2の例としては、単結合、アルキレン基、O、COO、S、CONH、CO等又はこれらの組み合わせ等があり、単結合、又はアルキレン基、COO基、又はこれらの組み合わせが好ましい。
V1が2価のアリール基、2価のヘテロアリール基の場合、前記一般式(1)のRで説明したアリール基、ヘテロアリール基で例示した芳香環又はこれら芳香環が複数連結された芳香族化合物から2つの水素を除いて生じる基が挙げられる。
V1がアリールアミノ基、ヘテロアリールアミノ基の場合、アリール基またはヘテロアリール基は、前記一般式(1)のRで説明したアリール基、ヘテロアリール基と同様である。
但し、V1は、5環以上の縮合環構造を有しないことが好ましい。
本発明の硬化性組成物及び硬化物を用いた有機電界発光素子は、一対の陽極と陰極の間に複数の有機層を持ち、特に正孔輸送層/発光層兼電子輸送層、正孔輸送層兼発光層/電子輸送層、または正孔輸送層/発光層/電子輸送層からなることが好ましい。特に好ましくは、正孔輸送層/発光層/電子輸送層の層構造である。また、本発明の有機電界発光素子は、また各有機層を形成した後、それぞれに保護層を設けることもできる。更に、素子全体を水分や酸素から保護するために保護膜を設けてもよい。
発光層における発光材料は、蛍光発光材料としては各種文献で公知の化合物や以下に示すような化合物が使用可能であるが、これに限らない。
化合物(C-2)の合成
化合物(A-1)を用意し、下記スキーム(S1)に従い化合物(C-2)を合成する。
1H-NMR(400MHz、CDCl3):δ(ppm);8.141(1H、d、8Hz)、8.121(1H、br d、8Hz)、8.066(1H、br d、8Hz)、7.655(2H、m)、7.588(2H、d、8Hz)、7.542(1H、t、8Hz)、7.449(4H、m)、7.24-7.37(6H、m)、7.072(1H、ddd、2、7、8Hz)、6.729(1H、dd、11、18Hz)、6.136(2H、s)、5.754(1H、dd、1、18Hz)、5.250(1H、dd、1、11Hz)
FD-MSスペクトル:448(M+、base)
溶媒洗浄、UVオゾン処理した膜厚150nmからなるITO付ガラス基板に、正孔注入層としてポリ(3,4-エチレンジオキシチオフェン)/ポリスチレンスルホン酸(PEDOT/PSS):(エイチ・シー・シュタルク株式会社製、商品名:クレビオスPCH8000)を膜厚25nmで製膜した。次に、化合物(C-2)とBBPPA(化合物9:ビス(4-ビニルフェニル)フェニルアミン)を使用し、化合物(C-2):BBPPA=5:5(モル比)の比率で混合した混合物をテトラヒドロフランに溶解して0.4wt%溶液に調製し、スピンコート法により正孔輸送層として20nmを製膜した。
これを嫌気条件下150℃、3時間ホットプレートで溶媒除去し、加熱、硬化を行った。次に、真空蒸着装置を用いて、発光層ドーパントとしてトリス(2-(p-トリル)ピリジン)イリジウム(III)を、発光層ホストとして4,4’-ビス(9H-カルバゾル-9-イル)ビフェニルを用い、ドーパント濃度が0.6wt%となるように共蒸着し、40nm発光層を製膜した。その後、真空蒸着装置を用いて、Alq3を35nm、陰極としてLiF/Alを膜厚170nmで製膜し、この素子をグローブボックス内で封止することにより有機電界発光素子を作製した。
溶媒洗浄、UVオゾン処理した膜厚150nmからなるITO付ガラス基板に、正孔注入層としてポリ(3,4-エチレンジオキシチオフェン)/ポリスチレンスルホン酸(PEDOT/PSS):(エイチ・シー・シュタルク株式会社製、商品名:クレビオスPCH8000)を膜厚25nmで製膜した。次に、化合物(C-2):BBPPA=5:5(モル比)の比率で混合した混合物をテトラヒドロフランに溶解して0.4wt%溶液に調製し、スピンコート法により正孔輸送層として20nmを製膜した。次に、嫌気条件下150℃、1時間ホットプレートで溶媒除去し、加熱、硬化を行った。この熱硬化膜は、架橋構造を有している膜であり、溶剤に不溶である。この熱硬化膜は、正孔輸送層(HTL)である。そして発光層ドーパントとしてトリス(2-(p-トリル)ピリジン)イリジウム(III)を、発光層ホストとして4,4’-ビス(9H-カルバゾル-9-イル)ビフェニルを用い、ドーパント濃度が0.6wt%となるようにトルエンに溶解させ、1wt%溶液調製し、スピンコート法により発光層として40nmを製膜した。
その後、真空蒸着装置を用いて、Alq3を35nm、陰極としてLiF/Alを膜厚170nmで製膜し、この素子をグローブボックス内で封止することにより有機電界発光素子を作製した。素子評価は、実施例1と同様に行った。尚、発光層をスピンコート製膜した後に、硬化膜が溶解せず、発光層と積層できていることを高速分光エリプソメーター(ジェー・エー・ウーラム・ジャパン社製M2000)を用いて確認している。
実施例2において、化合物(C-2)に代えて下記化合物(A-3)を使用し、BBPPAに代えてBOPC(化合物7)を使用した以外は、実施例2と同様にして素子を作製、評価した。なお、化合物(A-3)は合成例1に示す手法に準じて合成した。
実施例1において、化合物(C-2):BBPPA=5:5(モル比)の比率で混合した混合物を使用しなかった以外は、実施例1と同様にして素子を作製、評価した。
実施例2において、化合物(C-2):BBPPA=5:5(モル比)の比率で混合した混合物に代えて下記化合物(B1)を用い正孔輸送層を作成し、硬化に交流電源方式の紫外線照射装置を用いて紫外線を90秒間照射し、光重合して硬化を行った以外は実施例2と同様にして素子を作製、評価した。
実施例2において、化合物(C-2):BBPPA=5:5(モル比)の比率で混合した混合物を使用しなかった以外は、実施例2と同様にして素子を作製、評価した。
実施例2において、化合物(C-2):BBPPA=5:5(モル比)の比率で混合した混合物に代えて低分子正孔輸送材料であるNPD(N,N'-di-naphthaleyl-N,N'-diphenyl-1,1'- biphenyl-4,4'-diamine )を使用した以外は、実施例2と同様にして素子を作製、評価した。
Claims (9)
- 一般式(1)で表される化合物と一般式(2)で表される化合物を含有する硬化性組成物であって、一般式(1)で表される化合物と一般式(2)で表される化合物の合計モル数に対し、一般式(1)で表される化合物を10~90モル%、一般式(2)で表される化合物を90~10モル%を含有することを特徴とする硬化性組成物。
一般式(1)中、環Aは隣接環と任意の位置で縮合する式(1a)で表される複素環を表し、Rは水素原子、C1~C20のアルキル基、C1~C20のアルコキシ基、C6~C30のアリール基、C6~C30のアリールオキシ基、C7~C36のアリールアルキル基、C7~C36のアリールアルキルオキシ基、C3~C30のヘテロアリール基、C3~C30のヘテロアリールオキシ基、C4~C36のヘテロアリールアルキル基、C4~C36のヘテロアリールアルキルオキシ基又はC3~C30のシクロアルキル基を表し、同一であっても異なっていてもよい。Y1は単結合、又は2価の基を表し、W1は重合性基を表し、Z1はC6~C30のアリール基、C3~C30のヘテロアリール基又はC12~C60のジアリールアミノ基を表す。
一般式(2)中、Y3は単結合、又は2価の基を表し、W2は重合性基であり、2つのW2は同一であっても異なっていてもよい。 - 一般式(2)のY3が、C6~C18の2価のアリール基、C3~C18の2価のヘテロアリール基、C6~C18の2価のアリールアミノ基又はC3~C18の2価のヘテロアリールアミノ基を内部に有することを特徴とする請求項1に記載の硬化性組成物。
- 一般式(1)、及び(2)におけるW1、及びW2が、ラジカル重合性基またはカチオン重合性基であることを特徴とする請求項1に記載の硬化性組成物。
- W1、及びW2が、独立にビニル基、炭素数1~6のアルキル基で置換された置換ビニル基、エポキシ基、及びオキセタニル基から選ばれる重合性基であることを特徴とする請求項4に記載の硬化性組成物。
- W1、及びW2が、ビニル基及び置換ビニル基から選ばれるビニル基類であり、一般式(1)で表される化合物がビニル基類を1つ有し、一般式(2)で表される化合物がビニル基類を2つ有する請求項1に記載の硬化性組成物。
- 請求項1~6のいずれかに記載の硬化性組成物を硬化させてなる硬化物。
- 基板上に積層された陽極層及び陰極層の間に有機層を有する有機電界発光素子であって、該有機層の少なくとも一層に請求項7に記載の硬化物を含有することを特徴とする有機電界発光素子。
- 硬化物を含有する有機層が正孔輸送層であることを特徴とする請求項8に記載の有機電界発光素子。
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CN201280061155.5A CN104169336B (zh) | 2011-12-12 | 2012-11-30 | 固化性组合物、固化物及使用其的有机电致发光元件 |
US14/358,973 US9614172B2 (en) | 2011-12-12 | 2012-11-30 | Curable composition, cured product, and organic electroluminescence element using same |
EP12858042.0A EP2792699B1 (en) | 2011-12-12 | 2012-11-30 | Cured product and organic electroluminescence element using same |
JP2013549209A JP5972902B2 (ja) | 2011-12-12 | 2012-11-30 | 硬化性組成物、硬化物及びそれを用いた有機電界発光素子 |
KR1020147019033A KR101877325B1 (ko) | 2011-12-12 | 2012-11-30 | 경화성 조성물, 경화물 및 그것을 사용한 유기 전계 발광 소자 |
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EP (1) | EP2792699B1 (ja) |
JP (1) | JP5972902B2 (ja) |
KR (1) | KR101877325B1 (ja) |
CN (1) | CN104169336B (ja) |
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WO2022131346A1 (ja) * | 2020-12-17 | 2022-06-23 | 株式会社Adeka | 化合物及び組成物 |
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KR101941532B1 (ko) * | 2011-06-27 | 2019-01-23 | 닛테츠 케미컬 앤드 머티리얼 가부시키가이샤 | 유기 전계발광 소자용 중합체 및 그것을 이용한 유기 전계발광 소자 |
TWI808948B (zh) * | 2016-11-04 | 2023-07-21 | 美商羅門哈斯電子材料有限公司 | 量子點發光裝置 |
CN108110060A (zh) * | 2017-12-12 | 2018-06-01 | 合肥京东方显示技术有限公司 | 薄膜晶体管及其制作方法、阵列基板和显示装置 |
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- 2012-11-30 CN CN201280061155.5A patent/CN104169336B/zh not_active Expired - Fee Related
- 2012-11-30 US US14/358,973 patent/US9614172B2/en active Active
- 2012-11-30 EP EP12858042.0A patent/EP2792699B1/en active Active
- 2012-11-30 WO PCT/JP2012/081062 patent/WO2013088974A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
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EP2792699A1 (en) | 2014-10-22 |
EP2792699A4 (en) | 2016-02-17 |
JPWO2013088974A1 (ja) | 2015-04-27 |
EP2792699B1 (en) | 2021-04-07 |
JP5972902B2 (ja) | 2016-08-17 |
CN104169336B (zh) | 2016-08-31 |
TWI520941B (zh) | 2016-02-11 |
CN104169336A (zh) | 2014-11-26 |
KR101877325B1 (ko) | 2018-07-11 |
US20140326982A1 (en) | 2014-11-06 |
US9614172B2 (en) | 2017-04-04 |
TW201326122A (zh) | 2013-07-01 |
KR20140101426A (ko) | 2014-08-19 |
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