WO2013002053A1 - 有機電界発光素子用重合体及びそれを用いた有機電界発光素子 - Google Patents
有機電界発光素子用重合体及びそれを用いた有機電界発光素子 Download PDFInfo
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- WO2013002053A1 WO2013002053A1 PCT/JP2012/065489 JP2012065489W WO2013002053A1 WO 2013002053 A1 WO2013002053 A1 WO 2013002053A1 JP 2012065489 W JP2012065489 W JP 2012065489W WO 2013002053 A1 WO2013002053 A1 WO 2013002053A1
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- 239000010410 layer Substances 0.000 claims abstract description 153
- -1 N-indolocarbazolyl group Chemical group 0.000 claims abstract description 45
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- 238000004770 highest occupied molecular orbital Methods 0.000 claims description 14
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- GBXQPDCOMJJCMJ-UHFFFAOYSA-M trimethyl-[6-(trimethylazaniumyl)hexyl]azanium;bromide Chemical compound [Br-].C[N+](C)(C)CCCCCC[N+](C)(C)C GBXQPDCOMJJCMJ-UHFFFAOYSA-M 0.000 claims description 4
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Images
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- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
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- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
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- 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
Definitions
- the present invention relates to a polymer for an organic electroluminescence device having a structure in which an indolocarbazole unit is contained in the main chain, and an organic electroluminescence 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.
- This method is easy to enlarge the screen and is excellent in mass production, but has a problem that it is difficult to laminate the coating film and impurities are easily mixed therein. Therefore, an element using a high molecular weight hole transport material is inferior in element performance such as element efficiency and lifetime as compared with a low molecular weight hole transport material. Accordingly, there has been a demand for a polymer-based hole transport material having both excellent hole transport performance and good film forming properties.
- Non-Patent Document 1 is linked with polyvinylcarbazole and polysilane
- Patent Document 2 and Non-Patent Document 2 are linked with vinyltriphenylamine and triphenylamine with methylene. Structured polymers have been reported. However, organic electroluminescence devices using these have poor luminous efficiency and device stability, and have not been sufficiently improved.
- Patent Document 3 discloses a conjugated polymer bonded at the peripheral position of indolocarbazole
- Patent Document 4 discloses a conjugated polymer in which an indolocarbazole unit is introduced into a polyarylene main chain.
- soot polymer In order to apply the soot polymer to an organic electroluminescent device, it is necessary to improve the light emitting efficiency of the device and improve the stability of the film, the solubility in a solvent and the film forming property.
- This invention is made
- Another object of the present invention is to provide an organic electroluminescent element using the polymer used for a lighting device, an image display device, a backlight for a display device, and the like.
- the present invention relates to a polymer for an organic electroluminescent device containing an indolocarbazole skeleton in a polymer main chain, and an organic electroluminescent device having an organic layer between an anode layer and a cathode layer laminated on a substrate.
- the present invention relates to an organic electroluminescent device in which at least one of the organic layers is a layer containing the polymer.
- the present invention relates to a polymer for an organic electroluminescence device characterized by having a repeating unit represented by the following general formula (1) in a repeating unit constituting a main chain.
- Z is one or more repeating units selected from groups derived from indolocarbazole represented by the following formulas (1a) to (1e), and A is Z Different repeating units.
- l and m represent a molar ratio, where l is 5 to 100 mol% and m is 0 to 95 mol%, assuming that all repeating units are 100 mol%.
- n represents the average number of repetitions and is 2 to 10,000.
- Ar 1 is independently a substituted or unsubstituted C 6 -C 18 arylene group or a substituted or unsubstituted C 3 -C 18 heteroarylene group.
- R 1 is independently hydrogen, C 1 -C 12 alkyl group, C 1 -C 12 alkoxy group, C 6 -C 18 aryl group, C 6 -C 18 aryloxy group, C 7 -C 18 30 arylalkyl groups, C 7 -C 30 arylalkyloxy groups, C 3 -C 18 heteroaryl groups, C 3 -C 18 heteroaryloxy groups, or C 3 -C 18 cycloalkyl groups. .
- the present invention relates to a polymer for an organic electroluminescent element in the general formula (1), wherein Ar 1 is a group independently represented by the following formula (2) in the above formulas (1a) to (1e).
- each X is independently N or CL.
- L independently represents a hydrogen atom, a C 6 -C 18 aryl group, a C 3 -C 18 heteroaryl group, a C 12 -C 36 diarylamino group or a bond, and one of L is a bond is there.
- this invention relates to the polymer for organic electroluminescent elements whose A is a repeating unit represented by following formula (3) in General formula (1).
- Ar 2 is independently a substituted or unsubstituted C 6 -C 18 arylene group or a substituted or unsubstituted C 3 -C 18 heteroarylene group.
- Y is a C 1 to C 12 alkylene group, O, S, NR 2 , CO, CO 2 , SO, SO 2 , SCO, NR 2 CO, CONR 2 CO, or a single bond.
- p and q represent an integer of 0 to 3, at least one of p and q is an integer of 1 or more, and when one of p and q is 0, Y is a single bond.
- R 2 is a hydrogen atom, a C 1 -C 12 alkyl group, a C 3 -C 18 cycloalkyl group, a C 6 -C 18 aryl group, a C 7 -C 30 arylalkyl group, a C 3 A C 18 heteroaryl group or a C 4 -C 30 heteroarylalkyl group;
- the present invention relates to a polymer for an organic electroluminescent element in which A is a repeating unit represented by the following formula (4a) or (4b) in the general formula (1).
- A is a repeating unit represented by the following formula (4a) or (4b) in the general formula (1).
- Y 1 is a substituted or unsubstituted C 1 -C 6 alkylene group, N—R 4 group, O, S or a single bond
- Y 2 is a C— (R 4 ) 2 group, N—R 4 groups, O, or S.
- R 3 are each independently a hydrogen atom, an alkyl group of C 1 ⁇ C 12, alkoxy group of C 1 ⁇ C 12, C 6 aryl group ⁇ C 18, an aryloxy group of C 6 ⁇ C 18, C 7 ⁇ A C 30 arylalkyl group, a C 7 -C 30 arylalkyloxy group, a C 3 -C 18 heteroaryl group, a C 3 -C 18 heteroaryloxy group, or a C 3 -C 18 cycloalkyl group is there.
- R 4 is a hydrogen atom, a C 1 -C 12 alkyl group, a C 3 -C 18 cycloalkyl group, a C 6 -C 18 aryl group, a C 7 -C 30 arylalkyl group, a C 3 -C 18 Or a C 4 -C 30 heteroarylalkyl group.
- the present invention relates to a polymer for an organic electroluminescence device having a weight average molecular weight of 1,000 to 1,000,000 in the general formula (1).
- the present invention also relates to a polymer for an organic electroluminescence device, wherein in the general formula (1), m representing an existing molar ratio is 10 to 90 mol%.
- this invention relates to the polymer for organic electroluminescent elements which is an alternating copolymer in which A and Z which are repeating units couple
- 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 organic layer contains the polymer for an organic electroluminescent device in at least one layer of the organic layer.
- the present invention relates to an organic electroluminescent device characterized by the following.
- a hole transport layer is mentioned as an organic layer containing the said polymer for organic electroluminescent elements.
- Organic electroluminescence in which the difference between the HOMO energy of the polymer for organic electroluminescence device contained in the hole transport layer and the HOMO energy of the host material contained in the light emitting layer including the guest material and the host material is within ⁇ 0.5 eV An element is preferred.
- the polymer for organic electroluminescent elements of the present invention is an oligomer or a polymer represented by the general formula (1).
- the polymer for organic electroluminescent elements of the present invention can be a homopolymer or a copolymer.
- the polymer for an organic electroluminescence device of the present invention has an indolocarbazole skeleton capable of imparting excellent charge transporting ability, particularly hole transporting ability, in the repeating unit constituting the main chain.
- the number of repeating units constituting the main chain is not limited to one, but may be two or more.
- Z is included as an essential repeating unit
- A is included as an arbitrary repeating unit.
- n is the number of repetitions and is determined by the weight average molecular weight, but the average (number average) number of repetitions is 2 to 10,000, preferably 5 to 1,000.
- l and m represent the abundance ratios of Z and A as repeating units, and l representing the abundance ratio of Z is 5 to 100 mol% when all the repeating units are 100 mol%, and m is 0 to 95 Mol%.
- it is 10 to 90 mol%, more preferably 30 to 80 mol%.
- l is 100 mol%.
- m is preferably 10 to 90 mol%, more preferably 20 to 70 mol%.
- the polymer for organic electroluminescent elements of the present invention may contain terminal groups other than the repeating units Z and A represented by the general formula (1).
- the repeating unit A is a repeating unit other than the repeating unit Z, and may be one type or may be composed of two or more types of repeating units.
- Z is one or more repeating units selected from groups derived from indolocarbazole represented by the above formulas (1a) to (1e). It is a divalent group having two bonds from Ar 1 bonded to two Ns of the carbazole ring. Hereinafter, this divalent group is also referred to as an indolocarbazolyl group that bonds at the N-position.
- the indolocarbazolyl group bonded at the N-position can have a substituent on the carbon constituting the indolocarbazole ring.
- the indolocarbazolyl group bonded at the N-position has a plurality of condensable positions of the indole ring and the carbazole ring, so that the five types of structural isomer groups of the above formulas (1a) to (1e) are represented. Any structural isomer may be used.
- the indolocarbazolyl group bonded at the N-position represented by Z in the general formula (1) is any one selected from the group consisting of the structures represented by the above formulas (1a) to (1e), Or two or more indolocarbazolyl groups.
- Z in the general formula (1) is composed of two or more kinds of indolocarbazolyl groups.
- Ar 1 is a substituted or unsubstituted C 6 -C 18 arylene group or a substituted or unsubstituted C 3 -C 18 heteroarylene group.
- unsubstituted arylene group and heteroarylene group include benzene, pentalene, indene, naphthalene, azulene, heptalene, octalene, indacene, acenaphthylene, phenalene, phenanthrene, anthracene, trindene, fluoranthene, acephenanthrylene, and ASEAN.
- Tolylene triphenylene, pyrene, chrysene, tetraphen, tetracene, pleiaden, picene, perylene, pentaphen, pentacene, tetraphenylene, cholantolylene, helicene, hexaphen, rubicene, coronene, trinaphthylene, heptaphene, pyranthrene, ovalen, corannulene, fluorene, Anthanthrene, zetrene, terylene, naphthacenonaphthacene, truxene, furan, benzofuran, isobenzofuran, Santen, Oxatrene, Dibenzofuran, Perixanthenoxanthene, Thiophene, Thioxanthene, Thianthrene, Phenoxathiin, Thionaphthene, Isothianaphthene, Thioften
- the arylene group or heteroarylene group may have a substituent.
- the total number of substituents is 1 to 10, preferably 1 to 6, and more preferably 1 to 4.
- the substituent is not limited, and preferred examples include a C 1 to C 12 linear, branched, and cyclic alkyl group, a C 6 to C 12 aryl group, and a C 3 to C 12 heteroaryl group. .
- substituents include methyl, ethyl, n-propyl, i-propyl, n-butyl, t-butyl, cyclopentyl, cyclohexyl, phenyl, naphthyl, quinolyl, and indolyl.
- Ar 1 is more preferably a divalent group represented by the above formula (2).
- each X is independently either N or CL.
- Preferably 0 to 3 of X are N.
- L independently represents a hydrogen atom, a C 6 -C 18 aryl group, a C 3 -C 18 heteroaryl group, a C 12 -C 36 diarylamino group or a bond, and one of L is a bond is there. This bond is one of the two bonds that appear in equation (2).
- preferred aryl group, heteroaryl group, or aryl group of diarylamino group includes benzene, pentalene, indene, naphthalene, azulene, heptalene, octalene, indacene, acenaphthylene, phenalene, phenanthrene, anthracene, tridene, fluoranthene, aceto Phenanthrylene, aseantrilene, triphenylene, pyrene, chrysene, tetraphen, tetracene, pleiaden, picene, perylene, pentaphen, pentacene, tetraphenylene, cholanthrylene, helicene, hexaphene, rubicene, coronene, trinaphthylene, heptaphene, pyranthrene, overene , Coranulene, fluorene, an
- More preferable examples include a group formed by removing hydrogen from benzene, naphthalene, pyridine, pyrazine, pyrimidine, pyridazine, triazine, indole, carbazole, dibenzofuran, or dibenzothiophene, and a diphenylamino group.
- the aryl group of the aryl group, heteroaryl group, or diarylamino group may have a substituent, and when it has a substituent, the total number of substituents is 1 to 10, preferably 1 to 6. Yes, more preferably 1 to 4.
- the substituent is not particularly limited as long as it does not impair performance, but may be a C 1 to C 6 alkyl group, a C 5 to C 10 cycloalkyl group, a C 6 to C 12 aryl group, or C 3 -C 12 heteroaryl groups are preferred, and specific examples include methyl, ethyl, n-propyl, i-propyl, n-butyl, t-butyl, cyclopentyl, cyclohexyl, phenyl Group, naphthyl group, quinolyl group, indolyl group, furanyl group, pyrrolyl group, thiophenyl group, pyridyl group, pyrimidyl
- R 1 is independently a hydrogen atom, a C 1 -C 12 alkyl group, a C 1 -C 12 alkoxy group, a C 6 -C 18 aryl group, 6 to C 18 aryloxy group, C 7 to C 30 arylalkyl group, C 7 to C 30 arylalkyloxy group, C 3 to C 18 heteroaryl group, C 3 to C 18 heteroaryloxy group Or a C 3 -C 18 cycloalkyl group, which may be the same or different.
- these groups contain a hydrocarbon chain, it may be a straight chain or a branched chain, and may be substituted with a halogen such as Cl or F.
- a hydrogen atom Preferably, a hydrogen atom, C 1 -C 10 alkyl group, C 1 -C 10 alkoxy group, C 6 -C 12 aryl group, C 6 -C 12 aryloxy group, C 7 -C 22 aryl
- An alkyl group, a C 7 -C 22 arylalkyloxy group, a C 3 -C 12 heteroaryl group, a C 3 -C 12 heteroaryloxy group, or a C 3 -C 12 cycloalkyl group more preferably Is a hydrogen atom, a C 1 -C 6 alkyl group, a C 6 -C 12 aryl group, or a C 3 -C 12 heteroaryl group.
- these groups may further have a substituent.
- the substituent is not particularly limited as long as it does not impair performance, but may be a C 1 to C 6 alkyl group, a C 5 to C 10 cycloalkyl group, a C 6 to C 12 aryl group, or C 3 -C 12 heteroaryl groups are preferred, and specific examples include methyl, ethyl, n-propyl, i-propyl, n-butyl, t-butyl, cyclopentyl, cyclohexyl, phenyl Group, naphthyl group, quinolyl group, indolyl group, furanyl group, pyrrolyl group, thiophenyl group, pyridyl group, pyrimidyl group, triazinyl group, carbazolyl group, benzofuranyl group, dibenzofuranyl group, benzothiophenyl group, dibenzothiophenyl group, etc.
- A is a repeating unit different from Z, and A is not particularly limited as long as it consists of a divalent group, but is preferably a charge transporting group, Preferable A is a divalent group represented by the formula (3).
- Y is a C 1 to C 12 alkylene group, O, S, NR 2 , CO, CO 2 , SO, SO 2 , SCO, NR 2 CO, CONR 2 CO, or a single bond, Preferably, it is a C 1 to C 12 alkylene group, O, S, NR 2 , or a single bond.
- R 2 is preferably a hydrogen atom, a C 1 -C 6 alkyl group, a C 6 -C 12 aryl group or a C 3 -C 12 heteroaryl group.
- Specific examples include a methyl group, an ethyl group, n -Propyl, i-propyl, n-butyl, t-butyl, phenyl, naphthyl, quinolyl, indolyl, furanyl, pyrrolyl, thiophenyl, pyridyl, pyrimidyl, triazinyl, carbazolyl Group, benzofuranyl group, dibenzofuranyl group, benzothiophenyl group, dibenzothiophenyl group and the like, and when the substituent is an aryl group or heteroaryl group, it may further have a similar substituent.
- P and q each represents an integer of 0 to 3, preferably 0 to 2. However, when one of p and q is 0, Y is a single bond.
- Ar 2 is independently a substituted or unsubstituted C 6 -C 18 arylene group or a substituted or unsubstituted C 3 -C 18 heteroarylene group.
- Preferred Ar 2 is the same as the arylene group or heteroarylene group described for Ar 1 in the formulas (1a) to (1e).
- the description is the same as the explanation of the arylene group or the substituent of the heteroarylene group described for Ar 1 in the formulas (1a) to (1e).
- Y 1 is a substituted or unsubstituted C 1 -C 6 alkylene group, N—R 4 group, O, S, or a single bond
- Y 2 is C— (R 4 ) 2 group, N—R 4 group, O or S.
- R 3 is the same as R 1 described in the above formulas (1a) to (1e).
- R 4 is the same as R 2 described in the above formula (3).
- Y 1 is preferably a C 1 -C 3 alkylene group, or O, S, or a single bond, because the charge transport capability in the repeating unit decreases as the chain length increases and also becomes thermally unstable.
- Y 2 is preferably a C— (R 4 ) 2 group, O, or S.
- the polymer for an organic electroluminescent device having an indolocarbazole ring in the main chain of the present invention is easily produced by producing a monomer that gives the repeating unit Z or Z and A and polymerizing the monomer by a known method. can do. For example, it can be produced by the following reaction formula.
- the polymerization method may be either polycondensation or addition polymerization, but polycondensation by Suzuki coupling reaction is desirable from a general viewpoint.
- the repeating unit Z is a divalent group in which R 3 is substituted with two N of indolocarbazole, A is R 4 , and ZA is bonded alternately
- X in the above reaction examples means halogen.
- the weight average molecular weight Mw of the indolocarbazole polymer of the present invention is 1,000 to 1,000,000, preferably 2,000 to 300,000. If Mw is less than 1,000, it is difficult to form a uniform film, and if it exceeds 1,000,000, the solubility in organic solvents becomes extremely poor, and solution coating becomes difficult.
- polymers having an indolocarbazole skeleton of the present invention are shown below, but are not limited thereto.
- the polymer for organic electroluminescent elements of the present invention may be a homopolymer or a copolymer.
- the polymerization mode may be random, block, or alternating, but it is preferable to alternately polymerize as shown in the above formula.
- the polymer for organic electroluminescent elements of the present invention gives an excellent organic electroluminescent element by being contained in the organic layer of the organic EL element.
- at least one organic layer selected from a light emitting layer, a hole transport layer, an electron transport layer, and a hole blocking layer may be contained. More preferably, it may be contained as a hole transport layer.
- the light emitting layer is preferably a fluorescent or phosphorescent light emitting layer containing a host material and a guest material, and more preferably a phosphorescent light emitting layer.
- the HOMO energy of the polymer for an organic electroluminescence device of the present invention when contained in the hole transport layer, has a small difference between the HOMO energy of the host material contained in the light emitting layer adjacent to the hole transport layer. Is preferred. Moreover, when the adjacent light emitting layer contains a several compound, it is preferable that the difference with the compound used as the main component is small.
- the difference between the HOMO energy of the polymer for an organic electroluminescent element and the HOMO energy of the compound contained in the light emitting layer is ⁇ 0. 5 eV or less, preferably ⁇ 0.3 eV or less.
- the values of LUMO energy and HOMO energy in this specification are values obtained using Gaussian 03, a molecular orbital calculation software manufactured by Gaussian, USA, and structure optimization calculation at B3LYP / 6-31G * level. It is defined as the value calculated by Since the polymer had the same value for trimers or more, it was calculated by calculation with trimers.
- the structure of the organic EL element of the present invention will be described with reference to the drawings.
- the structure of the organic EL element of the present invention is not limited to the illustrated one.
- FIG. 1 is a cross-sectional view schematically showing a structural example of a general organic EL element used in the present invention, wherein 1 is a substrate, 2 is an anode, 3 is a hole injection layer, 4 is a hole transport layer, Represents an electron and / or exciton blocking layer (EB layer), 6 represents a light emitting layer, 7 represents an electron transport layer, and 8 represents a cathode.
- the organic EL device of the present invention has an anode, a hole transport layer, a light emitting layer, and a cathode as essential layers. Preferably, it has an anode, a hole transport layer, a light emitting layer, an electron transport layer, and a cathode.
- the organic EL device of the present invention can also have an electron transport layer, an electron injection layer, an EB layer, and a hole blocking layer in layers other than the essential layers.
- the hole transport layer may be a hole injection / transport layer having a hole injection function
- the electron transport layer may be an electron injection / transport layer having an electron injection function.
- the organic EL device of the present invention has a structure opposite to that shown in FIG. 1, that is, a cathode 8, an electron transport layer 7, a light emitting layer 6, an EB layer 5, a hole transport layer 4 and an anode 2 on the substrate 1 in this order. Stacking is also possible, and in this case, layers can be added or omitted as necessary.
- the organic EL element of the present invention is preferably supported on a substrate.
- the substrate is not particularly limited as long as it is conventionally used for an organic EL element.
- a substrate made of glass, transparent plastic, quartz, or the like can be used.
- the light emitting layer is a layer containing a light emitting material, and may be either a fluorescent light emitting layer or a phosphorescent light emitting layer, but is preferably a phosphorescent light emitting layer.
- the fluorescent light emitting material may be at least one kind of fluorescent light emitting material, but it is preferable to use the fluorescent light emitting material as a fluorescent light emitting dopant and include a host material. .
- a polymer for an organic electroluminescent device represented by the general formula (1) can be used as the fluorescent light emitting material in the light emitting layer.
- the compound is used in any other organic layer, Since it is known from patent documents and the like, it can be selected from them.
- benzoxazole derivatives benzimidazole derivatives, benzothiazole derivatives, styrylbenzene derivatives, polyphenyl derivatives, diphenylbutadiene derivatives, tetraphenylbutadiene derivatives, naphthalimide derivatives, coumarin derivatives, condensed aromatic compounds, perinone derivatives, oxadiazole derivatives, Oxazine derivatives, aldazine derivatives, pyralidine derivatives, cyclopentadiene derivatives, bisstyrylanthracene derivatives, quinacridone derivatives, pyrrolopyridine derivatives, thiadiazolopyridine derivatives, cyclopentadiene derivatives, styrylamine derivatives, diketopyrrolopyrrole derivatives, aromatic dimethylidine compounds, Represented by metal complexes of 8-quinolinol derivatives, metal complexes of pyromethene derivatives, rare earth complexes
- Preferred examples include condensed aromatic compounds, styryl compounds, diketopyrrolopyrrole compounds, oxazine compounds, pyromethene metal complexes, transition metal complexes, and lanthanoid complexes. More preferred are naphthacene, pyrene, chrysene, triphenylene, benzo [c] phenanthrene.
- the amount of the fluorescent light emitting dopant contained in the light emitting layer is 0.01 to 20% by weight, preferably 0.1 to 10% by weight. It should be in range.
- an organic EL element injects electric charges into a luminescent material from both an anode and a cathode, generates an excited luminescent material, and emits light.
- a charge injection type organic EL element it is said that 25% of the generated excitons are excited to the excited singlet state and the remaining 75% are excited to the excited triplet state.
- certain fluorescent substances emit triplet-triplet annihilation or thermal energy after energy transition to the excited triplet state due to intersystem crossing, etc. It is known that, due to absorption, the excited singlet state is crossed back to back to emit fluorescence and to express thermally activated delayed fluorescence.
- An organic EL device using the compound of the present invention can also exhibit delayed fluorescence. In this case, both fluorescence emission and delayed fluorescence emission can be included. However, light emission from the host material may be partly or partly emitted.
- the phosphorescent material includes a phosphorescent dopant and a host material.
- the phosphorescent dopant 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 many 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 1 to 50% by weight. More preferably, it is 5 to 30% by weight.
- the host material in the light emitting layer a known host material can be used, and the polymer of the present invention can also be used as the host material. Moreover, you may use the polymer of this invention, and another host material together.
- 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 that forms the hole transporting layer the polymer for organic electroluminescent elements of the present invention is advantageously used. If necessary, a tertiary amine triphenylamine derivative, carbazole derivative and the like are exemplified as long as the object of the present invention is not impaired.
- One or more low molecular hole transporting compounds may be blended as an additive and used as a composition. Specific examples of the hole transporting compound are shown below, but are not limited thereto.
- the electron blocking layer has a role to block electrons from reaching the hole transport layer while transporting holes, thereby improving the probability of recombination of electrons and holes in the light emitting layer.
- Examples of the material for the electron blocking layer include:
- the exciton blocking layer is a layer for preventing excitons generated by recombination of holes and electrons in the light emitting layer from diffusing into the charge transport layer. It becomes possible to efficiently confine in the light emitting layer, and the light emission efficiency of the device can be improved.
- the exciton blocking layer can be inserted on either the anode side or the cathode side adjacent to the light emitting layer, or both can be inserted simultaneously.
- the layer when the exciton blocking layer is provided on the anode side, the layer can be inserted adjacent to the light emitting layer between the hole transport layer and the light emitting layer, and when inserted on the cathode side, the light emitting layer and the cathode Between the luminescent layer and the light-emitting layer.
- a hole injection layer, an electron blocking layer, or the like can be provided between the anode and the exciton blocking layer adjacent to the anode side of the light emitting layer, and the excitation adjacent to the cathode and the cathode side of the light emitting layer can be provided.
- an electron injection layer, an electron transport layer, a hole blocking layer, and the like can be provided between the child blocking layer.
- exciton blocking layers examples include 1,3-dicarbazolylbenzene (mCP) and bis (2-methyl-8-quinolinolato) -4-phenylphenolatoaluminum (III) ( BAlq).
- the EB layer is an electron blocking layer, an exciton blocking layer, or a layer having a function of both.
- Examples of a material for forming the EB layer include 1,3-dicarbazolylbenzene (MCP).
- the electron transporting compound that forms the electron transporting 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 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 tin oxide
- metals 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.
- the compounds synthesized in the examples were identified by one or more analytical methods selected from 1 H-NMR (solvent: deuterated chloroform), FD-MS, GPC, TGA, DSC, UV and IR analysis.
- Example 1 According to the following scheme, compound (A-2) and compound (B-4) are synthesized, and then polymer (P-1) is synthesized.
- the compound (A-2) and the compound (B-4) were polymerized to synthesize a polymer (P-1). Specifically, 0.66 g (1.0 mmol) of the compound (A-2) and 0.44 g (1.00 mmol) of the compound (B-4) were dissolved in 20 ml of toluene, and tetrakistriphenylphosphine palladium (catalyst) was used as a catalyst. 0) 10 mg, 2 ml of 2M Na 2 CO 3 aqueous solution was added, and the reaction was carried out at 70 ° C. for 3 and a half hours after nitrogen substitution.
- Example 2 The device of the polymer (P-1) obtained in Example 1 was evaluated. First, a glass substrate with ITO having a film thickness of 150 nm subjected to solvent washing and UV ozone treatment, and poly (3,4-ethylenedioxythiophene) / polystyrene sulfonic acid (PEDOT / PSS) as a hole injection layer: (H.C.) -Stark Co., Ltd. product name: Clevios PCH8000) was formed to a film thickness of 25 nm. Next, the synthesized polymer (P-1) was dissolved in THF 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.
- PEDOT / PSS polystyrene sulfonic acid
- the organic electroluminescent device When an external power source was connected to the organic electroluminescent device thus obtained and a DC voltage of 0 to 10 V was applied, it was confirmed that the organic EL device had the light emission characteristics as shown in Table 1.
- the luminance, voltage, and light emission efficiency show values at the time of driving 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 3 When polymerizing the compound (A-2) and the compound (B-4), 0.66 g (1.0 mmol) of the compound (A-2) and 0.40 g (0.9 mmol) of the compound (B-4) were used. Except for the above, a polymer (P-2) was obtained in the same manner as in Example 1. The polymer had a Mw of 2,500 and a molecular weight distribution of 1.5. The element evaluation was performed in the same manner as in Example 2.
- Example 4 A polymer (P-3) is synthesized from the compound (A-2) and 1,3-diiodobenzene according to the following scheme.
- Example 5 Compound (B-5) is synthesized according to the following scheme, and then polymer (P-4) is synthesized from compound (A-2) and compound (B-5).
- the polymer (P--) was changed in the same manner as in Example 1 except that the compound (A-2) was changed to 0.66 g (1.0 mmol) and the compound (B-5) 0.31 g (1.0 mmol). 4) was obtained.
- the polymer had an Mw of 3,500 and a molecular weight distribution of 1.7. Element evaluation was performed in the same manner as in Example 2. *
- Example 6 A polymer (P-5) is synthesized from the compound (A-2) and bis (4-bromophenyl) ether according to the following scheme.
- Example 2 Polymerization and post-treatment were performed in the same manner as in Example 1 except that 0.66 g (1.0 mmol) of compound (A-2) and 0.33 g (1.0 mmol) of bis (4-bromophenyl) ether were used. 0.10 g of (P-5) was obtained. This polymer had Mw of 5,200 and a molecular weight distribution of 1.9.
- the element evaluation was performed in the same manner as in Example 2.
- Example 7 A polymer (P-6) is synthesized from the compound (A-2) and N-butylphenyl-N, N′-bisdibromodiphenylamine according to the following scheme.
- Example 2 Polymerization and post-treatment were carried out in the same manner as in Example 1 except that 0.66 g (1.0 mmol) of the compound (A-2) and 0.46 g (1.0 mmol) of N-butylphenyl-N, N′-bisdibromodiphenylamine were used. Treatment gave 0.33 g of polymer (P-6). The polymer had an Mw of 15,000 and a molecular weight distribution of 1.9. The element evaluation was performed in the same manner as in Example 2.
- Example 8 A polymer (P-7) is synthesized from the compound (A-3) and the compound (B-4) according to the following scheme.
- Example 2 Polymerization and post-treatment were performed in the same manner as in Example 1 except that the compound (A-1) was changed to 0.66 g (1.0 mmol) of the compound (A-3) to obtain 0.32 g of the polymer (P-7). Obtained. This polymer had Mw of 5,200 and a molecular weight distribution of 1.8. The element evaluation was performed in the same manner as in Example 2.
- Example 9 (comparison) A polymer (EP-1) is synthesized using compound (B-5) according to the following scheme.
- Table 2 shows the polymers used for device evaluation and the evaluation results. All the polymers were used for the hole transport layer. The maximum wavelength of the device emission spectrum was 550 nm, and green emission derived from an iridium complex was observed.
- the hole injection property of the organic electroluminescence device is improved and the light emission efficiency is excellent.
- a large-area element can be easily manufactured by a coating film forming method or the like.
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Abstract
Description
一般式(1)中、Zは下記式(1a)~(1e)で表わされるインドロカルバゾールから誘導される基から選択される1種又は2種以上の繰り返し単位であり、AはZとは異なる繰り返し単位である。l及びmは存在モル比を表わし、全繰り返し単位を100モル%としたとき、lは5~100モル%、mは0~95モル%である。nは平均の繰り返し数を表わし、2~10000である。
式(1a)~(1e)中、Ar1は独立に置換もしくは未置換のC6~C18のアリーレン基、または置換もしくは未置換のC3~C18のヘテロアリーレン基である。R1はそれぞれ独立に、水素、C1~C12のアルキル基、C1~C12のアルコキシ基、C6~C18のアリール基、C6~C18のアリールオキシ基、C7~C30のアリールアルキル基、C7~C30のアリールアルキルオキシ基、C3~C18のヘテロアリール基、C3~C18のヘテロアリールオキシ基、又はC3~C18のシクロアルキル基である。
式(2)中、Xは各々独立にN又はC-Lの何れかである。Lは独立に水素原子、C6~C18のアリール基、C3~C18のヘテロアリール基、C12~C36のジアリールアミノ基又は結合手を表し、Lのうち1つは結合手である。
ここで、Ar2は独立に置換もしくは未置換のC6~C18のアリーレン基、または置換もしくは未置換のC3~C18のヘテロアリーレン基である。また、YはC1~C12のアルキレン基、O、S、NR2、CO、CO2、SO、SO2、SCO、NR2CO、CONR2CO又は単結合である。pおよびqは0~3の整数を表わし、pおよびqの少なくとも1方は1以上の整数であり、pおよびqの1方が0の場合、Yは単結合である。ここで、R2は、水素原子、C1~C12のアルキル基、C3~C18のシクロアルキル基、C6~C18のアリール基、C7~C30のアリールアルキル基、C3~C18のヘテロアリール基、又はC4~C30のヘテロアリールアルキル基である。
ここで、Y1は置換もしくは未置換のC1~C6のアルキレン基、N-R4基、O、S又は単結合であり、Y2はC-(R4)2基、N-R4基、O、又はSである。R3はそれぞれ独立に、水素原子、C1~C12のアルキル基、C1~C12のアルコキシ基、C6~C18のアリール基、C6~C18のアリールオキシ基、C7~C30のアリールアルキル基、C7~C30のアリールアルキルオキシ基、C3~C18のヘテロアリール基、C3~C18のヘテロアリールオキシ基、又はC3~C18のシクロアルキル基である。R4は、水素原子、C1~C12のアルキル基、C3~C18のシクロアルキル基、C6~C18のアリール基、C7~C30のアリールアルキル基、C3~C18のヘテロアリール基、又はC4~C30のヘテロアリールアルキル基である。
本発明の有機EL素子は、基板に支持されていることが好ましい。この基板については、特に制限はなく、従来から有機EL素子に慣用されているものであればよく、例えば、ガラス、透明プラスチック、石英などからなるものを用いることができる。
発光層は、発光材料を含有する層であり、蛍光発光層、燐光発光層のいずれでも良いが、燐光発光層であることが好ましい。
正孔輸送層を形成する正孔輸送性化合物としては、本発明の有機電界発光素子用重合体が有利に使用される。必要に応じて、本発明の目的を損なわない範囲で、第3級アミンのトリフェニルアミン誘導体、カルバゾール誘導体などが例示される。低分子正孔輸送性化合物などを添加剤として1種又は2種以上配合し、組成物として用いてもよい。以下に、正孔輸送性化合物を具体的に例示するが、これらに限定されるものではない。
電子阻止層は正孔を輸送しつつ、電子が正孔輸送層へ到達することを阻止する役割があり、これにより発光層中での電子と正孔が再結合する確率を向上させることができる。電子阻止層の材料としては、が挙げられる。
励起子阻止層とは、発光層内で正孔と電子が再結合することにより生じた励起子が電荷輸送層に拡散することを阻止するための層であり、本層の挿入により励起子を効率的に発光層内に閉じ込めることが可能となり、素子の発光効率を向上させることができる。励起子阻止層は発光層に隣接して陽極側、陰極側のいずれにも挿入することができ、両方同時に挿入することも可能である。すなわち、励起子阻止層を陽極側に有する場合、正孔輸送層と発光層の間に、発光層に隣接して該層を挿入することができ、陰極側に挿入する場合、発光層と陰極との間に、発光層に隣接して該層を挿入することができる。また、陽極と、発光層の陽極側に隣接する励起子阻止層との間には、正孔注入層や電子阻止層などを有することができ、陰極と、発光層の陰極側に隣接する励起子阻止層との間には、電子注入層、電子輸送層、正孔阻止層などを有することができる。
EB層は、電子阻止層、励起子阻止層又は両者の機能を有する層であり、EB層を形成する材料としては、1,3-ジカルバゾリルベンゼン(MCP)等が挙げられる。
電子輸送層を形成する電子輸送性化合物としては、オキサジアゾール誘導体、イミダゾール誘導体、トリアゾール誘導体などが例示される。必要に応じて、本発明の目的を損なわない範囲で、低分子電子輸送性化合物などを添加剤として1種又は2種以上配合し、組成物として用いてもよい。以下に、電子輸送性化合物を具体的に例示するが、これらに限定されるものではない。
陽極からの正孔注入効率を向上させるために陽極と正孔輸送層又は発光層の間に正孔注入層を入れてもよい。正孔注入層を形成する正孔注入材料としては、ポリチオフェン誘導体、ポリピロール誘導体などの導電性高分子が使用できる。中でも、ポリチオフェン誘導体のポリ(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)が正孔注入効率の点から好ましい。正孔注入層を使用する場合、その厚さは好ましくは200nm以下、より好ましくは100nm以下である。
陽極は、正孔注入層、正孔輸送層または発光層などに正孔を供給するものであり、一般的にガラス基板上に形成される。本発明に用いられる陽極材料は特に限定されないが、具体的にはインジウム-スズ酸化物(ITO)、スズ酸化物などの導電性金属酸化物や金、銀、白金などの金属が挙げられる。また、市販のITO付ガラスを使用することもできる。市販のITO付ガラスは、通常、洗浄剤水溶液、溶剤洗浄後、UVオゾン照射装置又はプラズマ照射装置により清浄して使用される。
陰極は、電子輸送層または発光層に電子を供給するものであり、本発明に用いられる陽極材料は特に限定されないが、具体的にはLi、Mg、Ca、Alなどの金属やそれらの合金、例えばMg-Ag合金、Mg-Al合金などが挙げられる。
下記スキームに従い、化合物(A-2)及び化合物(B-4)を合成し、次いで重合体(P-1)を合成する。
1H-NMR(400MHz、CDCl3):δ(ppm);8.12-8.17(3H、m)、8.077(1H、dt、J=8,2Hz)、8.002(1H、br d、J=2Hz)、7.949(1H、ddd、J=1,2,7Hz)、7.63-7.67(4H、m)、7.19-7.33(6H、m)、6.766(1H、ddd、J=2,7,8Hz)、5.935(1H、d、J=8Hz)、1.352(12H、s)、1.261(12H、s)
FD-MSスペクトル:660(M+、base)
実施例1で得た重合体(P-1)の素子評価を行った。まず、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、合成した重合体(P-1)をTHF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、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、トリス(8-ヒドロキシキノリネート)アルミニウム(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。
化合物(A-2)と化合物(B-4)を重合させる際、化合物(A-2)0.66g(1.0mmol)と化合物(B-4)0.40g(0.9mmol)を使用した以外は、実施例1と同様にして重合体(P-2)を得た。このポリマーのMwは2,500、分子量分布1.5であった。また素子評価は、実施例2と同様に行った。
下記スキームに従い化合物(A-2)と1,3-ジヨードベンゼンから重合体(P-3)を合成する。
下記スキームに従い化合物(B-5)を合成し、次いで化合物(A-2)と化合物(B-5)から重合体(P-4)を合成する。
下記スキームに従い化合物(A-2)とビス(4-ブロモフェニル)エーテルから重合体(P-5)を合成する。
化合物(A-2)0.66g(1.0mmol)とビス(4-ブロモフェニル)エーテル0.33g(1.0mmol)を使用した以外は実施例1と同様に重合及び後処理して重合体(P-5)0.10gを得た。このポリマーのMwは5,200、分子量分布1.9であった。また素子評価は、実施例2と同様に行った。
下記スキームに従い化合物(A-2)とN-ブチルフェニル-N,N‘-ビスジブロモジフェニルアミンから重合体(P-6)を合成する。
下記スキームに従い化合物(A-3)と化合物(B-4)から重合体(P-7)を合成する。
下記スキームに従い化合物(B-5)を用いて重合体(EP-1)を合成する。
Claims (10)
- 主鎖を構成する繰り返し単位中に、下記一般式(1)で表される繰り返し単位を有することを特徴とする有機電界発光素子用重合体。
ここで、Zは下記式(1a)~(1e)で表わされるインドロカルバゾールから誘導される基から選択される1種又は2種以上の繰り返し単位であり、AはZとは異なる1種又は2種以上の繰り返し単位である。l及びmは存在モル比を表わし、全繰り返し単位を100モル%としたとき、lは5~100モル%、mは0~95モル%である。nは平均の繰り返し数を表わし、2~10000である。
式(1a)~(1e)中、Ar1は独立に置換もしくは未置換のC6~C18のアリーレン基、または置換もしくは未置換のC3~C18のヘテロアリーレン基である。R1はそれぞれ独立に、水素、C1~C12のアルキル基、C1~C12のアルコキシ基、C6~C18のアリール基、C6~C18のアリールオキシ基、C7~C30のアリールアルキル基、C7~C30のアリールアルキルオキシ基、C3~C18のヘテロアリール基、C3~C18のヘテロアリールオキシ基、又はC3~C18のシクロアルキル基である。 - 一般式(1)において、Aが下記式(3)で表わされる繰り返し単位である請求項1に記載の有機電界発光素子用重合体。
ここで、Ar2は独立に置換もしくは未置換のC6~C18のアリーレン基、または置換もしくは未置換のC3~C18のヘテロアリーレン基である。YはC1~C12のアルキレン基、O、S、NR2、CO、CO2、SO、SO2、SCO、NR2CO、CONR2COもしくは単結合である。pおよびqは0~3の整数を表わし、pおよびqの少なくとも1方は1以上の整数であり、p又はqが0の場合は、Yは単結合である。ここで、R2は水素原子、C1~C12のアルキル基、C3~C18のシクロアルキル基、C6~C18のアリール基、C7~C30のアリールアルキル基、C3~C18のヘテロアリール基、又はC4~C30のヘテロアリールアルキル基である。 - 一般式(1)において、Aが下記式(4a)又は(4b)で表わされる繰り返し単位である請求項1に記載の有機電界発光素子用重合体。
ここで、Y1は置換もしくは未置換のC1~C6のアルキレン基、N-R4基、O、S又は単結合であり、Y2はC-(R4)2基、N-R4基、O、又はSである。R3はそれぞれ独立に、水素、C1~C12のアルキル基、C1~C12のアルコキシ基、C6~C18のアリール基、C6~C18のアリールオキシ基、C7~C30のアリールアルキル基、C7~C30のアリールアルキルオキシ基、C3~C18のヘテロアリール基、C3~C18のヘテロアリールオキシ基、又はC3~C18のシクロアルキル基である。R4は、水素原子、C1~C12のアルキル基、C3~C18のシクロアルキル基、C6~C18のアリール基、C7~C30のアリールアルキル基、C3~C18のヘテロアリール基、又はC4~C30のヘテロアリールアルキル基である。 - 重量平均分子量が1,000~1,000,000である請求項1に記載の有機電界発光素子用重合体。
- 一般式(1)において、存在モル比を表すmが10~90モル%である請求項1に記載の有機電界発光素子用重合体。
- 一般式(1)において、繰り返し単位であるA及びZが交互に結合した交互共重合体である請求項1に記載の有機電界発光素子用重合体。
- 基板上に積層された陽極層及び陰極層の間に少なくとも正孔輸送層と発光層及び電子輸送層を含む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1~7のいずれかに記載の有機電界発光素子用重合体を含有することを特徴とする有機電界発光素子。
- 請求項1~7のいずれかに記載の有機電界発光素子用重合体を含有する有機層が正孔輸送層である請求項8に記載の有機電界発光素子。
- 発光層が、ゲスト材料とホスト材料とを含む発光層であり、正孔輸送層に含有される有機電界発光素子用重合体のHOMOエネルギーと、発光層に含有されるホスト材料のHOMOエネルギーの差が±0.5eV以内であることを特徴とする請求項9に記載の有機電界発光素子。
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CN201280025740.XA CN103688383B (zh) | 2011-06-27 | 2012-06-18 | 有机电致发光元件用聚合物及使用了其的有机电致发光元件 |
US14/118,866 US10193069B2 (en) | 2011-06-27 | 2012-06-18 | Polymer for use in organic electroluminescent element and organic electroluminescent element employing same |
JP2013522759A JP6031030B2 (ja) | 2011-06-27 | 2012-06-18 | 有機電界発光素子用重合体及びそれを用いた有機電界発光素子 |
KR1020147002064A KR101941532B1 (ko) | 2011-06-27 | 2012-06-18 | 유기 전계발광 소자용 중합체 및 그것을 이용한 유기 전계발광 소자 |
EP12804346.0A EP2725633B1 (en) | 2011-06-27 | 2012-06-18 | Polymer for use in organic electroluminescent element and organic electroluminescent element employing same |
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EP (1) | EP2725633B1 (ja) |
JP (1) | JP6031030B2 (ja) |
KR (1) | KR101941532B1 (ja) |
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EP2903048A4 (en) * | 2012-09-28 | 2016-05-18 | Nippon Steel & Sumikin Chem Co | COMPOUND FOR ORGANIC ELECTROLUMINESCENT ELEMENTS, AND ORGANIC ELECTROLUMINESCENT ELEMENT |
KR20170027790A (ko) | 2014-07-09 | 2017-03-10 | 닛산 가가쿠 고교 가부시키 가이샤 | 전하 수송성 바니시, 전하 수송성 박막 및 그 제조 방법, 그리고 유기 일렉트로 루미네선스 소자 및 그 제조 방법 |
WO2018083801A1 (ja) * | 2016-11-07 | 2018-05-11 | 日立化成株式会社 | 有機エレクトロニクス材料、有機層、有機エレクトロニクス素子、有機エレクトロルミネセンス素子、表示素子、照明装置、及び表示装置 |
US11508909B2 (en) | 2017-03-02 | 2022-11-22 | Showa Denko Materials Co., Ltd. | Organic electronic material and use of same |
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WO2014166572A1 (de) * | 2013-04-08 | 2014-10-16 | Merck Patent Gmbh | Organische lichtemittierende vorrichtung mit verzögerter fluoreszenz |
KR102148918B1 (ko) * | 2016-05-10 | 2020-08-28 | 히타치가세이가부시끼가이샤 | 전하 수송성 재료, 유기 일렉트로닉스 소자, 및 유기 일렉트로루미네센스 소자 |
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EP2903048A4 (en) * | 2012-09-28 | 2016-05-18 | Nippon Steel & Sumikin Chem Co | COMPOUND FOR ORGANIC ELECTROLUMINESCENT ELEMENTS, AND ORGANIC ELECTROLUMINESCENT ELEMENT |
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Also Published As
Publication number | Publication date |
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EP2725633B1 (en) | 2018-08-01 |
US20140084279A1 (en) | 2014-03-27 |
EP2725633A1 (en) | 2014-04-30 |
JPWO2013002053A1 (ja) | 2015-02-23 |
US10193069B2 (en) | 2019-01-29 |
JP6031030B2 (ja) | 2016-11-24 |
EP2725633A4 (en) | 2015-07-15 |
CN103688383B (zh) | 2016-01-20 |
KR20140058512A (ko) | 2014-05-14 |
TWI525123B (zh) | 2016-03-11 |
TW201313773A (zh) | 2013-04-01 |
KR101941532B1 (ko) | 2019-01-23 |
CN103688383A (zh) | 2014-03-26 |
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