WO2015008939A1 - 공중합체 및 이를 포함하는 유기 태양 전지 - Google Patents
공중합체 및 이를 포함하는 유기 태양 전지 Download PDFInfo
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- WO2015008939A1 WO2015008939A1 PCT/KR2014/005393 KR2014005393W WO2015008939A1 WO 2015008939 A1 WO2015008939 A1 WO 2015008939A1 KR 2014005393 W KR2014005393 W KR 2014005393W WO 2015008939 A1 WO2015008939 A1 WO 2015008939A1
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 6
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- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
- H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
- H10K85/113—Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G61/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G61/12—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule
- C08G61/122—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule derived from five- or six-membered heterocyclic compounds, other than imides
- C08G61/123—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule derived from five- or six-membered heterocyclic compounds, other than imides derived from five-membered heterocyclic compounds
- C08G61/126—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule derived from five- or six-membered heterocyclic compounds, other than imides derived from five-membered heterocyclic compounds with a five-membered ring containing one sulfur atom in the ring
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
- C08G75/32—Polythiazoles; Polythiadiazoles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L65/00—Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Compositions of derivatives of such polymers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
- H10K85/151—Copolymers
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Definitions
- the present specification relates to a copolymer and an organic solar cell including the same.
- Organic solar cells are devices that can directly convert solar energy into electrical energy by applying the photovoltaic effect.
- Solar cells can be divided into inorganic solar cells and organic solar cells according to the material constituting the thin film.
- Typical solar cells are made of p-n junctions by doping crystalline silicon (Si), an inorganic semiconductor. Electrons and holes generated by absorbing light diffuse to the p-n junction and are accelerated by the electric field to move to the electrode.
- the power conversion efficiency of this process is defined as the ratio of the power given to the external circuit and the solar power entered into the solar cell, and is currently achieved by 24% when measured under standardized virtual solar irradiation conditions.
- organic semiconductor solar cell which is easy to process, cheap and has various functions, has been spotlighted as a long-term alternative energy source.
- An object of the present specification is to provide a copolymer and an organic solar cell including the same.
- the first unit represented by the following formula (1); And it provides a copolymer comprising a second unit represented by the formula (2).
- l is the mole fraction, which is 0 ⁇ l ⁇ 1
- n is a mole fraction and is a real number with 0 ⁇ m ⁇ 1,
- a and B are different from each other and are a direct bond; Monocyclic or polycyclic substituted or unsubstituted divalent heterocyclic groups; Monocyclic or polycyclic substituted or unsubstituted divalent aromatic ring groups; And 1 or 2 or more from the group consisting of a monocyclic or polycyclic heterocyclic group and a condensed bivalent condensed ring substituted or unsubstituted monocyclic or polycyclic aromatic ring,
- R1 to R8 are the same as or different from each other, and are each independently hydrogen; heavy hydrogen; Halogen group; Nitrile group; Nitro group; Imide group; Amide group; Hydroxyl group; Substituted or unsubstituted alkyl group; A substituted or unsubstituted cycloalkyl group; Substituted or unsubstituted alkoxy group; Substituted or unsubstituted aryloxy group; Substituted or unsubstituted alkylthioxy group; Substituted or unsubstituted arylthioxy group; Substituted or unsubstituted alkyl sulfoxy group; Substituted or unsubstituted aryl sulfoxy group; Substituted or unsubstituted alkenyl group; Substituted or unsubstituted silyl group; Substituted or unsubstituted boron group; Sub
- the first electrode A second electrode provided to face the first electrode; And at least one organic material layer provided between the first electrode and the second electrode and including a photoactive layer, wherein at least one of the organic material layers includes the copolymer.
- the copolymer of the present specification may be used as a material of the organic solar cell organic material layer, and the organic solar cell including the same may exhibit excellent characteristics such as increase in open voltage and short circuit current and / or increase in efficiency.
- planarity and solubility of the polymer may be arbitrarily adjusted by adjusting the ratio of the first unit and the second unit having different solubility, thereby producing an organic solar cell having high efficiency.
- the copolymer according to the exemplary embodiment of the present specification may exhibit excellent properties by having a deep HOMO level, a small band gap, and high charge mobility.
- the polymer according to the exemplary embodiment of the present specification may be used alone or in a mixture with other materials in an organic solar cell, and may improve the efficiency of the device and improve the lifetime characteristics of the device by thermal stability of the compound.
- FIG. 1 illustrates an organic solar cell according to an exemplary embodiment of the present specification.
- FIG. 2 is a diagram showing a current-voltage curve of the organic solar cells of Preparation Examples 1 to 6 of the present specification.
- FIG. 3 is a diagram showing current voltage curves of the organic solar cells of Comparative Examples 1 and 2 of the present specification.
- 'unit' is a repeating structure included in the monomer of the copolymer, and means a structure in which the monomer is bonded in the copolymer by polymerization.
- a copolymer including a first unit represented by Chemical Formula 1 and a second unit represented by Chemical Formula 2 is provided.
- the first unit and the second unit include an unsubstituted thiophene group.
- the bulk benzodithiophene and steric hinderence located next to the thiophenes of the first unit and the second unit can be prevented, and the structure of the main chain can be prevented from tilting.
- the A and B units are different.
- a and B are different from each other, and any one of the following chemical formulas.
- X1 and X2 are the same as or different from each other, and are each independently selected from the group consisting of CRR ', NR, O, SiRR', PR, S, GeRR ', Se and Te,
- Y1 to Y4 are the same as or different from each other, and each independently selected from the group consisting of CR, N, SiR, P, and GeR,
- R10 to R13, R and R ' are the same as or different from each other, and each independently hydrogen; heavy hydrogen; Halogen group; Nitrile group; Nitro group; Imide group; Amide group; Hydroxyl group; Substituted or unsubstituted alkyl group; A substituted or unsubstituted cycloalkyl group; Substituted or unsubstituted alkoxy group; Substituted or unsubstituted aryloxy group; Substituted or unsubstituted alkylthioxy group; Substituted or unsubstituted arylthioxy group; Substituted or unsubstituted alkyl sulfoxy group; Substituted or unsubstituted aryl sulfoxy group; Substituted or unsubstituted alkenyl group; Substituted or unsubstituted silyl group; Substituted or unsubstituted
- substituted or unsubstituted is deuterium; Halogen group; An alkyl group; Alkenyl groups; An alkoxy group; Cycloalkyl group; Silyl groups; Aryl alkenyl group; Aryloxy group; Alkyl thioxy group; Alkyl sulfoxy groups; Aryl sulfoxy group; Boron group; Alkylamine group; Aralkyl amine groups; Arylamine group; Heteroaryl group; Carbazole groups; Arylamine group; Aryl group; Nitrile group; Nitro group; It means that it is substituted with one or more substituents selected from the group consisting of a hydroxy group and a heterocyclic group or have no substituent.
- examples of the halogen group include fluorine, chlorine, bromine or iodine.
- carbon number of an imide group is not specifically limited, It is preferable that it is C1-C25. Specifically, it may be a compound having a structure as follows, but is not limited thereto.
- the amide group may be substituted with one or two of the nitrogen of the amide group is hydrogen, a linear, branched or cyclic alkyl group having 1 to 25 carbon atoms or an aryl group having 6 to 25 carbon atoms. Specifically, it may be a compound of the following structural formula, but is not limited thereto.
- the alkyl group may be linear or branched chain, carbon number is not particularly limited, but is preferably 1 to 50.
- Specific examples include methyl, ethyl, propyl, n-propyl, isopropyl, butyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methyl-butyl, 1-ethyl-butyl, pentyl, n-pentyl , Isopentyl, neopentyl, tert-pentyl, hexyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, heptyl, n -Heptyl, 1-methylhexyl, cyclopentylmethyl, cyclohexylmethyl, octyl, n-o
- the cycloalkyl group is not particularly limited, but preferably 3 to 60 carbon atoms, specifically, cyclopropyl, cyclobutyl, cyclopentyl, 3-methylcyclopentyl, 2,3-dimethylcyclopentyl, cyclohexyl, 3-methylcyclohexyl, 4-methylcyclohexyl, 2,3-dimethylcyclohexyl, 3,4,5-trimethylcyclohexyl, 4-tert-butylcyclohexyl, cycloheptyl, cyclooctyl, and the like, but are not limited thereto. Do not.
- the alkoxy group may be linear, branched or cyclic. Although carbon number of an alkoxy group is not specifically limited, It is preferable that it is C1-C20. Specifically, methoxy, ethoxy, n-propoxy, isopropoxy, i-propyloxy, n-butoxy, isobutoxy, tert-butoxy, sec-butoxy, n-pentyloxy, neopentyloxy, Isopentyloxy, n-hexyloxy, 3,3-dimethylbutyloxy, 2-ethylbutyloxy, n-octyloxy, n-nonyloxy, n-decyloxy, benzyloxy, p-methylbenzyloxy and the like It may be, but is not limited thereto.
- the alkenyl group may be linear or branched chain, the carbon number is not particularly limited, but is preferably 2 to 40.
- Specific examples include vinyl, 1-propenyl, isopropenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 3-methyl-1- Butenyl, 1,3-butadienyl, allyl, 1-phenylvinyl-1-yl, 2-phenylvinyl-1-yl, 2,2-diphenylvinyl-1-yl, 2-phenyl-2- ( Naphthyl-1-yl) vinyl-1-yl, 2,2-bis (diphenyl-1-yl) vinyl-1-yl, stilbenyl group, styrenyl group and the like, but are not limited thereto.
- the aryl group may be a monocyclic aryl group or a polycyclic aryl group.
- the aryl group in the present specification may mean an aromatic ring.
- the aryl group is a monocyclic aryl group
- carbon number is not particularly limited, but preferably 6 to 25 carbon atoms.
- the monocyclic aryl group may be a phenyl group, a biphenyl group, a terphenyl group, etc., but is not limited thereto.
- Carbon number is not particularly limited when the aryl group is a polycyclic aryl group. It is preferable that it is C10-24. Specifically, as the polycyclic aryl group, naphthyl group, anthracenyl group, phenanthryl group, pyrenyl group, perylenyl group, chrysenyl group, fluorenyl group Etc., but is not limited thereto.
- the fluorenyl group may be substituted, and two substituents may be bonded to each other to form a spiro structure.
- the silyl group includes trimethylsilyl group, triethylsilyl group, t-butyldimethylsilyl group, vinyldimethylsilyl group, propyldimethylsilyl group, triphenylsilyl group, diphenylsilyl group, phenylsilyl group, and the like.
- the present invention is not limited thereto.
- the boron group specifically includes, but is not limited to, trimethylboron group, triethylboron group, t-butyldimethylboron group, triphenylboron group, phenylboron group, and the like.
- the amine group is not particularly limited, but is preferably 1 to 30.
- Specific examples of the amine group include methylamine group, dimethylamine group, ethylamine group, diethylamine group, phenylamine group, naphthylamine group, biphenylamine group, anthracenylamine group, and 9-methyl-anthracenylamine group.
- examples of the arylamine group include a substituted or unsubstituted monoarylamine group, a substituted or unsubstituted diarylamine group, or a substituted or unsubstituted triarylamine group.
- the aryl group in the arylamine group may be a monocyclic aryl group, may be a polycyclic aryl group.
- the arylamine group including two or more aryl groups may simultaneously include a monocyclic aryl group, a polycyclic aryl group, or a monocyclic aryl group and a polycyclic aryl group.
- aryl amine group examples include phenylamine, naphthylamine, biphenylamine, anthracenylamine, 3-methyl-phenylamine, 4-methyl-naphthylamine, 2-methyl-biphenylamine, 9-methyl-anthra Cenylamine, diphenyl amine group, phenyl naphthyl amine group, ditolyl amine group, phenyl tolyl amine group, carbazole and triphenyl amine group and the like, but are not limited thereto.
- the heterocyclic group is a heterocyclic group having one or more heteroatoms instead of carbon, and the carbon number is not particularly limited, but is preferably 2 to 60 carbon atoms.
- heterocyclic groups include thiophene group, furan group, pyrrole group, imidazole group, thiazole group, oxazole group, oxadiazole group, triazole group, pyridyl group, bipyridyl group, pyrimidyl group, triazine group, triazole group, Acridyl group, pyridazine group, pyrazinyl group, quinolinyl group, quinazoline group, quinoxalinyl group, phthalazinyl group, pyrido pyrimidinyl group, pyrido pyrazinyl group, pyrazino pyrazinyl group, isoquinoline group , Indole group, carbazole group, benzoxazole group,
- the aryl group in the aryloxy group, arylthioxy group, aryl sulfoxy group and aralkylamine group is the same as the aryl group described above.
- the aryloxy group phenoxy, p-tolyloxy, m-tolyloxy, 3,5-dimethyl-phenoxy, 2,4,6-trimethylphenoxy, p-tert-butylphenoxy, 3-biphenyl Oxy, 4-biphenyloxy, 1-naphthyloxy, 2-naphthyloxy, 4-methyl-1-naphthyloxy, 5-methyl-2-naphthyloxy, 1-anthryloxy, 2-anthryl Oxy, 9-anthryloxy, 1-phenanthryloxy, 3-phenanthryloxy, 9-phenanthryloxy, and the like.
- arylthioxy group examples include a phenylthioxy group, 2-methylphenylthioxy group, and 4-tert-butylphenyl.
- Thioxy groups and the like, and aryl sulfoxy groups include, but are not limited to, benzene sulfoxy groups and p-toluene sulfoxy groups.
- the heteroatom may be one or more of N, O and S, but is not limited thereto.
- heteroaryl group in the heteroarylamine group may be selected from the examples of the heterocyclic group described above.
- the alkyl group in the alkylamine group, the alkylthioxy group, and the alkyl sulfoxy group is the same as the example of the alkyl group described above.
- the alkyl thioxy group includes a methyl thioxy group, an ethyl thioxy group, a tert-butyl thioxy group, a hexyl thioxy group, an octyl thioxy group
- the alkyl sulfoxy group includes mesyl, ethyl sulfoxy, propyl sulfoxy and butyl sulfoxy groups. Etc., but is not limited thereto.
- the meaning that two adjacent substituents are bonded to each other to form a ring means that a substituted or unsubstituted aliphatic hydrocarbon ring is bonded to each other with adjacent groups; Substituted or unsubstituted aromatic hydrocarbon ring; Substituted or unsubstituted aliphatic heterocycle; Or to form a substituted or unsubstituted aromatic heterocycle.
- the aliphatic hydrocarbon ring means a ring composed only of carbon and hydrogen atoms as a ring which is not aromatic.
- examples of the aromatic hydrocarbon ring include, but are not limited to, phenyl group, naphthyl group, anthracenyl group, and the like.
- the aliphatic heterocycle means an aliphatic ring containing one or more heteroatoms instead of carbon.
- the aromatic heterocycle means an aromatic ring including one or more heteroatoms instead of carbon.
- the aliphatic hydrocarbon ring, aromatic hydrocarbon ring, aliphatic hetero ring and aromatic hetero ring may be monocyclic or polycyclic.
- the solubility of the second unit is greater than the solubility of the first unit.
- the solubility of the second unit is 2 to 10 times greater than the solubility of the first unit.
- the solubility of the final copolymer can be arbitrarily adjusted by adjusting the ratio of the first unit and the second unit.
- solubility in units means measured at room temperature solubility in the solution of the monomer of each unit.
- the solubility value may be specified, but it is not necessary to satisfy the solubility numerical conditions specified in all the solutions, it is only necessary to satisfy the solubility numerical conditions in one or more selected solutions. .
- the solution is one or two selected from the group consisting of chlorinated solvent, toluene, xylene, xylene, trimethylbenzene, and tetrahydrofuran More than species.
- the trimethylbenzenes include, for example, 1,2,4-trimethylbenzene, 1,2,3-trimethylbenzene, but are not limited thereto.
- the solubility in a chlorobenzene solution is measured under room temperature conditions.
- the chlorinated solvent includes chloroform, 1,2-dichlorobenzene, tetrachloroethane, and the like, but is not limited thereto.
- solubility in the selected solution is selected from the group consisting of chlorinated solvent, toluene, xylenes, trimethylbenzenes and tetrahydrofuran (THF) in the first unit. 2 to 10 times greater than solubility in solution.
- the solubility in the chlorobenzene solution of the second unit is 2 to 10 times greater than the solubility in the chlorobenzene solution of the first unit.
- the planarity and / or solubility of the copolymer may be controlled by adjusting the ratio of l and m, which are molar fractions of the first and second units having different solubilities, to manufacture an organic solar cell having high efficiency.
- the solubility in the solution selected from the group consisting of tetrahydrofuran is 1 mg / ml to 200 mg / ml at room temperature.
- the solubility of the copolymer including the first unit and the second unit in a chlorobenzene solution is 1 mg / ml to 200 mg / ml at room temperature.
- the ratio of the first unit and the second unit is 1: 4 to 4: 1.
- the ratio of the first unit and the second unit is 1: 1.
- the solubility of the first unit and the second unit may be adjusted by A and B, or may be different by adjusting substituents of R1 to R4 and R5 to R8.
- the solubility of the first unit and the second unit can be adjusted by making A and B different. Differentiating A and B may be controlled by differentiating A and B corresponding to the main chain of the polymer or different substituents of A and B corresponding to the side chain of the polymer.
- B includes a substituent that increases at least one solubility in the side chain.
- B is a substituted or unsubstituted alkyl group having 1 to 40 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 40 carbon atoms, a substituted or unsubstituted sulfide group having 1 to 40 carbon atoms in a side chain thereof. And at least one hydroxyl group.
- A is to be.
- X1 is S.
- Y1 is N.
- Y2 is N.
- Y3 is CR.
- Y4 is CR
- R is hydrogen
- A is a first organic compound having the same in one embodiment of the present specification.
- A is to be.
- Y1 is N.
- Y2 is N.
- Y3 is CR.
- Y4 is CR
- R is hydrogen
- A is to be.
- A is to be.
- X1 is S.
- X2 is NR.
- R is a substituted or unsubstituted alkyl group.
- R is an octyl group.
- A is a first organic compound having the same in one embodiment of the present specification.
- A is to be.
- B is to be.
- X1 is S.
- Y1 is N.
- Y2 is N.
- Y3 is CR.
- Y4 is CR
- R is a substituted or unsubstituted alkoxy group.
- R is dodecanoxy group.
- B is to be.
- B is
- Y1 is N.
- Y2 is N.
- Y3 is CR.
- Y4 is CR
- R is a substituted or unsubstituted aryl group.
- R is a substituted or unsubstituted phenyl group.
- R is an aryl group unsubstituted or substituted with an alkoxy group.
- R is a phenyl group substituted with an octyloxy group.
- B is
- the first unit represented by Chemical Formula 1 is represented by any one of the following Chemical Formulas 1-1 to 1-3.
- R1 to R4, R and l are the same as defined in the formula (1).
- the second unit represented by Formula 2 is represented by the following Formula 2-1 or 2-2.
- R5 to R8 and m are the same as defined above,
- R15 to R18 are the same as or different from each other, and each independently hydrogen; heavy hydrogen; Halogen group; Nitrile group; Nitro group; Imide group; Amide group; Hydroxyl group; Substituted or unsubstituted alkyl group; A substituted or unsubstituted cycloalkyl group; Substituted or unsubstituted alkoxy group; Substituted or unsubstituted aryloxy group; Substituted or unsubstituted alkylthioxy group; Substituted or unsubstituted arylthioxy group; Substituted or unsubstituted alkyl sulfoxy group; Substituted or unsubstituted aryl sulfoxy group; Substituted or unsubstituted alkenyl group; Substituted or unsubstituted silyl group; Substituted or unsubstituted boron group; Substi
- At least one of R15 to R18 is a substituted or unsubstituted alkyl group having 1 to 40 carbon atoms; A substituted or unsubstituted alkoxy group of 1 to 40; Substituted or unsubstituted sulfide group having 1 to 40 carbon atoms; Or a hydroxyl group.
- the copolymer includes a copolymer represented by the following Formula 3.
- L, m, R1 to R8, A and B are the same as defined above,
- n is an integer from 1 to 10,000.
- R1 is hydrogen
- R4 is hydrogen
- R5 is hydrogen
- R8 is hydrogen
- R2 is a substituted or unsubstituted alkoxy group.
- R2 is a substituted or unsubstituted branched alkoxy group.
- R2 is a 2-ethyl-hexyloxy group.
- R3 is a substituted or unsubstituted alkoxy group.
- R3 is a substituted or unsubstituted branched alkoxy group.
- R3 is a 2-ethyl-hexyloxy group.
- R6 is a substituted or unsubstituted alkoxy group.
- R6 is a substituted or unsubstituted branched alkoxy group.
- R6 is a 2-ethyl-hexyloxy group.
- R7 is a substituted or unsubstituted alkoxy group.
- R7 is a substituted or unsubstituted branched alkoxy group.
- R7 is a 2-ethyl-hexyloxy group.
- the copolymer including the first unit and the second unit is any one of the following copolymers 1 to 6.
- the copolymer is a random copolymer, an alternating copolymer, an alternating copolymer, a block copolymer, a graft copolymer, and a star copolymer It is selected from the group consisting of (starblock copolymer).
- the copolymer is an alternating copolymer.
- the end group of the copolymer is hydrogen; heavy hydrogen; Halogen group; Nitrile group; Nitro group; Imide group; Amide group; Hydroxyl group; Substituted or unsubstituted alkyl group; A substituted or unsubstituted cycloalkyl group; Substituted or unsubstituted alkoxy group; Substituted or unsubstituted aryloxy group; Substituted or unsubstituted alkylthioxy group; Substituted or unsubstituted arylthioxy group; Substituted or unsubstituted alkyl sulfoxy group; Substituted or unsubstituted aryl sulfoxy group; Substituted or unsubstituted alkenyl group; Substituted or unsubstituted silyl group; Substituted or unsubstituted boron group; Substituted or unsubstit
- the end group of the copolymer is a heterocyclic group or an aryl group.
- the end group of the copolymer is 4- (trifluoromethyl) phenyl group (4- (trifluoromethyl) phenyl).
- the copolymer has a number average molecular weight of 500 g / mol to 1,000,000 g / mol.
- the number average molecular weight of the copolymer is preferably 10,000 to 100,000.
- the number average molecular weight of the copolymer is 30,000 to 70,000.
- the copolymer may have a molecular weight distribution of 1 to 100.
- the copolymer has a molecular weight distribution of 1 to 3.
- the number average molecular weight is preferably 100,000 or less in order to have a certain solubility or higher so that the solution coating method is advantageous.
- the copolymer may be prepared based on the preparation examples described below.
- the copolymer according to the present specification may be prepared by a multistage chemical reaction. Monomers are prepared through alkylation reactions, Grignard reactions, Suzuki coupling reactions, and Still coupling reactions, followed by carbon-carbon coupling reactions such as steel coupling reactions. Unions can be prepared. When the substituent to be introduced is a boronic acid or boronic ester compound, it can be prepared through Suzuki coupling reaction, and when the substituent to be introduced is a tributyltin compound, It may be prepared through a coupling reaction, but is not limited thereto.
- the first electrode A second electrode provided to face the first electrode; And at least one organic material layer provided between the first electrode and the second electrode and including a photoactive layer, wherein at least one of the organic material layers includes the copolymer.
- the organic solar cell of the present specification may have a structure as shown in FIG. 1, but is not limited thereto.
- FIG. 1 illustrates a structure of an organic solar cell in which a substrate 101, a first electrode 102, a hole transport layer 103, a photoactive layer 104, and a second electrode 105 are sequentially stacked.
- the organic solar cell according to the exemplary embodiment of the present specification includes a first electrode, a photoactive layer, and a second electrode.
- the organic solar cell may further include a substrate, a hole transport layer, and / or an electron transport layer.
- the organic solar cell when the organic solar cell receives photons from an external light source, electrons and holes are generated between the electron donor and the electron acceptor. The generated holes are transported to the anode through the electron donor layer.
- the organic material layer includes the hole transport layer, the hole injection layer, or a layer for simultaneously transporting holes and holes, and simultaneously transporting the hole transport layer, the hole injection layer, or the hole transport and the hole injection.
- the layer comprises the copolymer.
- the organic material layer includes an electron injection layer, an electron transporting layer, or a layer for simultaneously injecting and transporting electrons
- the electron injection layer, an electron transporting layer, or a layer for simultaneously injecting and transporting electrons is It includes the copolymer.
- the organic solar cell when the organic solar cell receives photons from an external light source, electrons and holes are generated between the electron donor and the electron acceptor. The generated holes are transported to the anode through the electron donor layer.
- the organic solar cell may further include an additional organic material layer.
- the organic solar cell may reduce the number of organic material layers by using an organic material having several functions at the same time.
- the organic solar cell may be arranged in the order of cathode, photoactive layer and anode, and may be arranged in the order of anode, photoactive layer and cathode, but is not limited thereto.
- the organic solar cell may be arranged in order of an anode, a hole transport layer, a photoactive layer, an electron transport layer, and a cathode, or may be arranged in the order of a cathode, an electron transport layer, a photoactive layer, a hole transport layer, and an anode. It is not limited to this.
- a buffer layer may be provided between the photoactive layer and the hole transport layer or between the photoactive layer and the electron transport layer.
- a hole injection layer may be further provided between the anode and the hole transport layer.
- an electron injection layer may be further provided between the cathode and the electron transport layer.
- the photoactive layer includes one or two or more selected from the group consisting of an electron donor and an acceptor, and the electron donor material includes the copolymer.
- the electron acceptor material may be selected from the group consisting of fullerenes, fullerene derivatives, vasocuprones, semiconducting elements, semiconducting compounds, and combinations thereof. Specifically, it may be PC 61 BM (phenyl C 61 -butyric acid methyl ester) or PC 71 BM (phenyl C 71 -butyric acid methyl ester).
- the electron donor and the electron acceptor are bulk hetero junction (BHJ).
- the electron donor material and the electron acceptor material are mixed in a ratio (w / w) of 1:10 to 10: 1.
- the substrate may be a glass substrate or a transparent plastic substrate having excellent transparency, surface smoothness, ease of handling, and waterproofness, but is not limited thereto, and the substrate may be any substrate that is commonly used in organic solar cells. Specifically, there are glass or polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polypropylene (PP), polyimide (PI), and triacetyl cellulose (TAC). It is not limited to this.
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- PP polypropylene
- PI polyimide
- TAC triacetyl cellulose
- the anode electrode may be a transparent and excellent conductive material, but is not limited thereto.
- Metals such as vanadium, chromium, copper, zinc and gold or alloys thereof;
- Metal oxides such as zinc oxide, indium oxide, indium tin oxide (ITO), indium zinc oxide (IZO); ZnO: Al or SNO 2 : Combination of metals and oxides such as Sb;
- Conductive polymers such as poly (3-methylthiophene), poly [3,4- (ethylene-1,2-dioxy) thiophene] (PEDOT), polypyrrole and polyaniline, and the like, but are not limited thereto.
- the method of forming the anode electrode is not particularly limited, but is applied to one surface of the substrate or coated in a film form using, for example, sputtering, E-beam, thermal deposition, spin coating, screen printing, inkjet printing, doctor blade or gravure printing. It can be formed by.
- the anode electrode When the anode electrode is formed on the substrate, it may be subjected to cleaning, water removal, and hydrophilic modification.
- the patterned ITO substrate is sequentially cleaned with a detergent, acetone, isopropyl alcohol (IPA), and then dried in a heating plate for 1 to 30 minutes at 100 to 150 ° C., preferably at 120 ° C. for 10 minutes to remove moisture.
- IPA isopropyl alcohol
- the surface of the substrate is modified to be hydrophilic.
- the bonding surface potential can be maintained at a level suitable for the surface potential of the photoactive layer.
- Pretreatment techniques for the anode electrode include a) surface oxidation using parallel plate discharge, b) oxidation of the surface through ozone generated using UV ultraviolet light in a vacuum state, and c) oxygen generated by plasma. And oxidation using radicals.
- One of the above methods can be selected depending on the state of the anode electrode or the substrate. In any case, however, it is desirable to prevent oxygen escape from the surface of the anode electrode or the substrate and to minimize the residual of moisture and organic matter in common. At this time, the substantial effect of the pretreatment can be maximized.
- a method of oxidizing a surface through ozone generated using UV may be used.
- the patterned ITO substrate is baked on a hot plate and dried well, then put into a chamber, and a UV lamp is activated to cause oxygen gas to react with UV light.
- the patterned ITO substrate can be cleaned.
- the surface modification method of the patterned ITO substrate in this specification does not need to be specifically limited, Any method may be used as long as it is a method of oxidizing a substrate.
- the cathode electrode may be a metal having a small work function, but is not limited thereto.
- metals such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin and lead or alloys thereof; LiF / Al, LiO 2 / Al, LiF / Fe, Al: Li, Al: BaF 2 , Al: BaF 2
- It may be a material of a multi-layer structure such as, but is not limited thereto.
- the cathode electrode may be formed by being deposited in a thermal evaporator showing a vacuum degree of 5 ⁇ 10 ⁇ 7 torr or less, but is not limited thereto.
- the hole transport layer and / or electron transport layer material plays a role of efficiently transferring electrons and holes separated in the photoactive layer to the electrode, and the material is not particularly limited.
- the hole transport layer material may be PEDOT: PSS (Poly (3,4-ethylenediocythiophene) doped with poly (styrenesulfonic acid)), molybdenum oxide (MoO x ); Vanadium oxide (V 2 O 5); Nickel oxide (NiO); Tungsten oxide (WO x ), and the like, but is not limited thereto.
- PSS Poly (3,4-ethylenediocythiophene) doped with poly (styrenesulfonic acid)), molybdenum oxide (MoO x ); Vanadium oxide (V 2 O 5); Nickel oxide (NiO); Tungsten oxide (WO x ), and the like, but is not limited thereto.
- the electron transport layer material may be electron-extracting metal oxides, specifically, a metal complex of 8-hydroxyquinoline; Complexes including Alq 3 ; Metal complexes including Liq; LiF; Ca; Titanium oxide (TiO x ); Zinc oxide (ZnO); And cesium carbonate (Cs 2 CO 3 ), and the like, but is not limited thereto.
- metal oxides specifically, a metal complex of 8-hydroxyquinoline; Complexes including Alq 3 ; Metal complexes including Liq; LiF; Ca; Titanium oxide (TiO x ); Zinc oxide (ZnO); And cesium carbonate (Cs 2 CO 3 ), and the like, but is not limited thereto.
- the photoactive layer may be formed by dissolving a photoactive material, such as an electron donor and / or an electron acceptor, in an organic solvent and then spin coating, dip coating, screen printing, spray coating, doctor blade, brush painting, or the like. It is not limited to the method.
- a photoactive material such as an electron donor and / or an electron acceptor
- the mixture was cooled to room temperature, poured into methanol, and then filtered through a solid, followed by Soxhlet extraction with methanol, acetone, hexane, and chloroform, and then the chloroform portion was precipitated in methanol again to filter out the solid.
- Weight average molecular weight 36,200 g / mol
- the mixture was cooled to room temperature and poured into methanol, and then the solid was filtered to methanol, Soxhlet extraction in acetone, hexane and chloroform , Re-precipitated in methanol to form a furnace section served to filter out solids.
- the mixture was cooled to room temperature, poured into methanol, and then filtered through a solid, followed by Soxhlet extraction with methanol, acetone, hexane, and chloroform, and then the chloroform portion was precipitated in methanol again to filter out the solid.
- Weight average molecular weight 64,000 g / mol
- the mixture was cooled to room temperature, poured into methanol, filtered, and filtered through a solid, followed by Soxhlet extraction in methanol, acetone, hexane, and chloroform. Refill the chloroform part Precipitated in all served to filter out solids.
- Weight average molecular weight 51,800 g / mol
- 1,3-di (2'-bromothien-5'-yl) -5-octylthieno [3,4-c] pyrrole-4,6-dione (1,3-di (2'-bromothien-5'-yl) -5-octylthieno [3,4-c] pyrrole-4,6-dione) was prepared with reference to previous literature. (A. Najari, S. Beaupre, P. Berrouard, Y. Zou, J. Pouliot, C. Lepage-Perusse, M. Leclerc, Adv. Funct. Mater. 21, 718-728)
- the mixture was cooled to room temperature, poured into methanol, and then filtered through a solid, followed by Soxhlet extraction with methanol, acetone, hexane, and chloroform, and then the chloroform portion was precipitated in methanol again to filter out the solid.
- Weight average molecular weight 80,000g / mol
- the mixture was cooled to room temperature, poured into methanol, and then filtered to extract solids into methanol, acetone, hexane, and chloroform. After soxhlet extraction, the chloroform portion was again precipitated in methanol to filter out solids.
- Weight average molecular weight 80,000g / mol
- Copolymer 1 and PC71BM prepared in Example 1 were dissolved in chlorobenzene (CB) in a ratio of 1: 2 to prepare a composite solution. At this time, the concentration was adjusted to 2.0 wt%, and the organic solar cell had a structure of ITO / PEDOT: PSS / photoactive layer / Al.
- ITO-coated glass substrates were ultrasonically cleaned with distilled water, acetone and 2-propanol, ozonated the ITO surface for 10 minutes, and spin-coated PEDOT: PSS (baytrom P) to 45 nm to 10 at 120 ° C. Heat treated for minutes.
- the copolymer 1-PC71BM composite solution was filtered through a 0.45 ⁇ m PP syringe filter and spin-coated to a thickness of 200 nm using a thermal evaporator under 3 ⁇ 10 ⁇ 8 torr vacuum. Al was deposited to prepare an organic solar cell.
- Copolymer 2 and PC71BM prepared in Example 2 were dissolved in 1: 2 chlorobenzene (CB) to prepare a composite solution.
- CB chlorobenzene
- the concentration was adjusted to 2.0 wt%, and the organic solar cell had a structure of ITO / PEDOT: PSS / photoactive layer / Al.
- ITO-coated glass substrates were ultrasonically cleaned with distilled water, acetone and 2-propanol, ozonated the ITO surface for 10 minutes, and spin-coated PEDOT: PSS (baytrom P) to 45 nm to 10 at 120 ° C. Heat treated for minutes.
- the copolymer 2-PC71BM composite solution was filtered through a 0.45 ⁇ m PP syringe filter and spin-coated to a thickness of 200 nm using a thermal evaporator under 3 ⁇ 10 ⁇ 8 torr vacuum. Al was deposited to prepare an organic solar cell.
- Copolymer 3 prepared in Example 3 and PC71BM were dissolved in chlorobenzene (CB) in a ratio of 1: 2 to prepare a composite solution.
- CB chlorobenzene
- the concentration was adjusted to 2.0 wt%, and the organic solar cell had a structure of ITO / PEDOT: PSS / photoactive layer / Al.
- ITO-coated glass substrates were ultrasonically cleaned with distilled water, acetone and 2-propanol, ozonated the ITO surface for 10 minutes, and spin-coated PEDOT: PSS (baytrom P) to 45 nm to 10 at 120 ° C. Heat treated for minutes.
- a thermal evaporator thermal evaporator
- Copolymer 4 prepared in Example 4 and PC71BM were dissolved in chlorobenzene (CB) in a ratio of 1: 2 to prepare a composite solution.
- CB chlorobenzene
- the concentration was adjusted to 2.0 wt%, and the organic solar cell had a structure of ITO / PEDOT: PSS / photoactive layer / Al.
- ITO-coated glass substrates were ultrasonically cleaned with distilled water, acetone and 2-propanol, ozonated the ITO surface for 10 minutes, and spin-coated PEDOT: PSS (baytrom P) to 45 nm to 10 at 120 ° C. Heat treated for minutes.
- the copolymer 4-PC71BM composite solution was filtered with a 0.45 ⁇ m PP syringe filter and spin-coated to a thickness of 200 nm using a thermal evaporator under 3 ⁇ 10 ⁇ 8 torr vacuum. Al was deposited to prepare an organic solar cell.
- Copolymer 5 and PC71BM prepared in Example 5 were dissolved in chlorobenzene (CB) in a ratio of 1: 2 to prepare a composite solution.
- CB chlorobenzene
- the concentration was adjusted to 2.0 wt%, and the organic solar cell had a structure of ITO / PEDOT: PSS / photoactive layer / Al.
- ITO-coated glass substrates were ultrasonically cleaned with distilled water, acetone and 2-propanol, ozonated the ITO surface for 10 minutes, and spin-coated PEDOT: PSS (baytrom P) to 45 nm to 10 at 120 ° C. Heat treated for minutes.
- the copolymer 5-PC71BM composite solution was filtered with a 0.45 ⁇ m PP syringe filter and spin-coated to a thickness of 200 nm using a thermal evaporator under a vacuum of 3 ⁇ 10 ⁇ 8 torr. Al was deposited to prepare an organic solar cell.
- Copolymer 6 prepared in Example 6 and PC71BM were dissolved in chlorobenzene (CB) in a ratio of 1: 2 to prepare a composite solution.
- CB chlorobenzene
- the concentration was adjusted to 2.0 wt%, and the organic solar cell had a structure of ITO / PEDOT: PSS / photoactive layer / Al.
- ITO-coated glass substrates were ultrasonically cleaned with distilled water, acetone and 2-propanol, ozonated the ITO surface for 10 minutes, and spin-coated PEDOT: PSS (baytrom P) to 45 nm to 10 at 120 ° C. Heat treated for minutes.
- the copolymer 5-PC71BM composite solution was filtered with a 0.45 ⁇ m PP syringe filter and spin-coated to a thickness of 200 nm using a thermal evaporator under a vacuum of 3 ⁇ 10 ⁇ 8 torr. Al was deposited to prepare an organic solar cell.
- An organic solar cell was manufactured under the same conditions as in Preparation Examples 1 to 6 except that Copolymer 7 and PC71BM were dissolved in chlorobenzene (CB) in a ratio of 1: 2.
- CB chlorobenzene
- An organic solar cell was manufactured under the same conditions as in Preparation Examples 1 to 6 except that Copolymer 8 and PC71BM were dissolved in chlorobenzene (CB) in a ratio of 1: 2.
- CB chlorobenzene
- the total thickness in the table 1 refers to the thickness of the active layer in an organic solar cell and a V oc is the open-circuit voltage, J sc is the short circuit current, FF is the filling factor (Fill factor), PCE refers to the energy-conversion efficiency.
- the open-circuit and short-circuit currents are the X- and Y-axis intercepts in the four quadrants of the voltage-current density curve, respectively. The higher these two values, the higher the efficiency of the solar cell.
- the fill factor is the area of the rectangle drawn inside the curve divided by the product of the short circuit current and the open voltage. By dividing these three values by the intensity of the emitted light, the energy conversion efficiency can be obtained, and higher values are preferable.
- Table 1 When introduced into an organic solar cell device, as shown in Table 1, the open voltage, the short-circuit current, and the FF are all reduced, indicating that the overall device efficiency is low. This introduces an alkyl group into the thiophene, which causes steric hindrance with the bulky benzodithiophene next to it, causing the main chain to tilt, preventing efficient intermolecular charge transfer and stacking the polymer backbone stacking.
- the short-circuit current is lowered from 7 to 8 mA / cm 2 to ⁇ 3 mA / cm 2
- FF is lowered from ⁇ 60 to ⁇ 30
- the HOMO energy is due to the electron donating effect of the hexyl group.
- the absolute value of the level is lowered, it can be expected that the open voltage in the device has dropped from ⁇ 0.6 to ⁇ 0.3.
- the results reflect the influence of each material layer and the interface, the above-mentioned contents are not the only reasons for the decrease in efficiency.
- FIG. 2 is a diagram showing a current-voltage curve of the organic solar cells of Preparation Examples 1 to 6 of the present specification.
- FIG. 3 is a diagram showing current voltage curves of the organic solar cells of Comparative Examples 1 and 2 of the present specification.
Abstract
Description
활성층 | VOC(V) | JSC (mA/cm2) | FF | PCE(%) | |
제조예 1 | 공중합체 1/PC71BM = 1:2 | 0.64 | 7.46 | 64.0 | 3.02 |
제조예 2 | 공중합체 2/ PC71BM = 1:2 | 0.63 | 7.27 | 68.5 | 3.08 |
제조예 3 | 공중합체 3/P PC71BM = 1:2 | 0.63 | 8.44 | 69.4 | 3.69 |
제조예 4 | 공중합체 4/ PC71BM = 1:2 | 0.64 | 8.41 | 68.1 | 3.64 |
제조예 5 | 공중합체 5/ PC71BM = 1:2 | 0.61 | 7.43 | 68.7 | 3.07 |
제조예 6 | 공중합체 6/ PC71BM = 1:2 | 0.62 | 7.36 | 67.8 | 3.08 |
비교예 1 | 공중합체 7/PC71BM = 1:2 | 0.34 | 3.49 | 32.6 | 0.39 |
비교예 2 | 공중합체 8/PC71BM = 1:2 | 0.33 | 3.97 | 34.3 | 0.45 |
l : m | 용해도 (mg/ml) |
75 : 25 | 안 녹음 |
62.5 : 37.5 | 안 녹음 |
50 : 50 | 3 |
37.5 : 62.5 | 7 |
25 : 75 | 26 |
l : m | 용해도 (mg/ml) |
75 : 25 | 안 녹음 |
62.5 : 37.5 | 안 녹음 |
50 : 50 | 안 녹음 |
37.5 : 62.5 | 안 녹음 |
25 : 75 | 19 |
Claims (20)
- 하기 화학식 1로 표시되는 제1 단위; 및하기 화학식 2로 표시되는 제2 단위를 포함하는 공중합체:[화학식 1][화학식 2]화학식 1 및 2에 있어서,l은 몰분율로서 0 < l < 1인 실수이고,m은 몰분율로서 0 < m < 1인 실수이며,l+m=1이고,A 및 B는 서로 상이하고, 직접결합; 단환 또는 다환의 치환 또는 비치환된 2가의 헤테로고리기; 단환 또는 다환의 치환 또는 비치환된 2가의 방향족 고리기; 및 단환 또는 다환의 헤테로고리기와 단환 또는 다환의 방향족 고리기가 치환 또는 비치환된 축합된 2가의 축합고리로 이루어진 군에서 1 또는 2 이상을 포함하며,R1 내지 R8은 서로 동일하거나 상이하고 각각 독립적으로 수소; 중수소; 할로겐기; 니트릴기; 니트로기; 이미드기; 아미드기; 히드록시기; 치환 또는 비치환된 알킬기; 치환 또는 비치환된 시클로알킬기; 치환 또는 비치환된 알콕시기; 치환 또는 비치환된 아릴옥시기; 치환 또는 비치환된 알킬티옥시기; 치환 또는 비치환된 아릴티옥시기; 치환 또는 비치환된 알킬술폭시기; 치환 또는 비치환된 아릴술폭시기; 치환 또는 비치환된 알케닐기; 치환 또는 비치환된 실릴기; 치환 또는 비치환된 붕소기; 치환 또는 비치환된 알킬아민기; 치환 또는 비치환된 아랄킬아민기; 치환 또는 비치환된 아릴아민기; 치환 또는 비치환된 헤테로아릴아민기; 치환 또는 비치환된 아릴기; 및 치환 또는 비치환된 헤테로고리기로 이루어진 군으로부터 선택된다.
- 청구항 1에 있어서,상기 A 및 B 는 서로 상이하고, 하기 화학식 중 어느 하나인 것인 공중합체:X1 및 X2는 서로 동일하거나 상이하고, 각각 독립적으로, CRR', NR, O, SiRR', PR, S, GeRR', Se 및 Te로 이루어진 군에서 선택되며,Y1 내지 Y4는 서로 동일하거나 상이하고, 각각 독립적으로 CR, N, SiR, P 및 GeR로 이루어진 군에서 선택되고,R10 내지 R13, R 및 R'는 서로 동일하거나 상이하고, 각각 독립적으로 수소; 중수소; 할로겐기; 니트릴기; 니트로기; 이미드기; 아미드기; 히드록시기; 치환 또는 비치환된 알킬기; 치환 또는 비치환된 시클로알킬기; 치환 또는 비치환된 알콕시기; 치환 또는 비치환된 아릴옥시기; 치환 또는 비치환된 알킬티옥시기; 치환 또는 비치환된 아릴티옥시기; 치환 또는 비치환된 알킬술폭시기; 치환 또는 비치환된 아릴술폭시기; 치환 또는 비치환된 알케닐기; 치환 또는 비치환된 실릴기; 치환 또는 비치환된 붕소기; 치환 또는 비치환된 알킬아민기; 치환 또는 비치환된 아랄킬아민기; 치환 또는 비치환된 아릴아민기; 치환 또는 비치환된 헤테로아릴아민기; 치환 또는 비치환된 아릴기; 및 치환 또는 비치환된 헤테로고리기로 이루어진 군으로부터 선택된다.
- 청구항 1에 있어서,상기 제2 단위의 용해도는 상기 제1 단위의 용해도보다 큰 것인 공중합체.
- 청구항 1에 있어서,상기 제2 단위의 용해도는 상기 제1 단위의 용해도보다 2배 내지 10배 큰 것인 공중합체.
- 청구항 1에 있어서,상기 제1 단위 및 상기 제2 단위를 포함하는 공중합체의 염화 솔벤트(chlorinated solvent), 톨루엔(Toluene), 자일렌(xylene)류, 트리메틸벤젠(trimethylbenzene)류 및 테트라하이드로퓨란으로 이루어진 군에서 선택되는 용액에서의 용해도는 상온에서 1 mg/ml 내지 200 mg/ml인 것인 공중합체.
- 청구항 1에 있어서,상기 제1 단위 및 상기 제2 단위를 포함하는 공중합체의 클로로벤젠, 톨루엔, 자일렌(xylene) 및 트리메틸벤젠으로 이루어진 군에서 선택되는 1종 또는 2종 이상의 용액에서의 용해도는 상온에서 1 mg/ml 내지 200 mg/ml인 것인 공중합체.
- 청구항 1에 있어서,상기 B는 측쇄에 적어도 하나의 용해도를 증가시키는 치환기를 포함하는 것인 공중합체.
- 청구항 1에 있어서,상기 B는 측쇄에 탄소수 1 내지 40의 치환 또는 비치환된 알킬기, 1 내지 40의 치환 또는 비치환된 알콕시기, 탄소수 1 내지 40의 치환 또는 비치환된 설파이드기 및 히드록시기 중 적어도 하나를 포함하는 것인 공중합체.
- 청구항 1에 있어서,상기 화학식 1로 표시되는 제1 단위는 하기 화학식 1-1 내지 1-3 중 어느 하나인 것인 공중합체:[화학식 1-1][화학식 1-2][화학식 1-3]화학식 1-1 내지 1-3에 있어서,R1 내지 R4 및 l은 청구항 1에서 정의한 바와 동일하고,R은 수소; 중수소; 할로겐기; 니트릴기; 니트로기; 이미드기; 아미드기; 히드록시기; 치환 또는 비치환된 알킬기; 치환 또는 비치환된 시클로알킬기; 치환 또는 비치환된 알콕시기; 치환 또는 비치환된 아릴옥시기; 치환 또는 비치환된 알킬티옥시기; 치환 또는 비치환된 아릴티옥시기; 치환 또는 비치환된 알킬술폭시기; 치환 또는 비치환된 아릴술폭시기; 치환 또는 비치환된 알케닐기; 치환 또는 비치환된 실릴기; 치환 또는 비치환된 붕소기; 치환 또는 비치환된 알킬아민기; 치환 또는 비치환된 아랄킬아민기; 치환 또는 비치환된 아릴아민기; 치환 또는 비치환된 헤테로아릴아민기; 및 치환 또는 비치환된 헤테로고리기로 이루어진 군으로부터 선택된다.
- 청구항 1에 있어서,상기 화학식 2로 표시되는 제2 단위는 하기 화학식 2-1 또는 2-2인 것인 공중합체:[화학식 2-1][화학식 2-2]화학식 2-1 및 2-2에 있어서,R5 내지 R8 및 m은 청구항 1에서 정의한 바와 동일하고,R15 내지 R18은 서로 동일하거나 상이하고, 각각 독립적으로 수소; 중수소; 할로겐기; 니트릴기; 니트로기; 이미드기; 아미드기; 히드록시기; 치환 또는 비치환된 알킬기; 치환 또는 비치환된 시클로알킬기; 치환 또는 비치환된 알콕시기; 치환 또는 비치환된 아릴옥시기; 치환 또는 비치환된 알킬티옥시기; 치환 또는 비치환된 아릴티옥시기; 치환 또는 비치환된 알킬술폭시기; 치환 또는 비치환된 아릴술폭시기; 치환 또는 비치환된 알케닐기; 치환 또는 비치환된 실릴기; 치환 또는 비치환된 붕소기; 치환 또는 비치환된 알킬아민기; 치환 또는 비치환된 아랄킬아민기; 치환 또는 비치환된 아릴아민기; 치환 또는 비치환된 헤테로아릴아민기; 및 치환 또는 비치환된 헤테로고리기로 이루어진 군으로부터 선택되거나, 인접한 2개의 치환기는 서로 결합하여 고리를 형성할 수 있다.
- 청구항 10에 있어서,R15 내지 R18 중 적어도 하나는 탄소수 1 내지 40의 치환 또는 비치환된 알킬기; 1 내지 40의 치환 또는 비치환된 알콕시기; 탄소수 1 내지 40의 치환 또는 비치환된 설파이드기; 또는 히드록시기인 것인 공중합체.
- 청구항 1 내지 12 중 어느 한 항에 있어서,상기 공중합체의 수평균 분자량은 500 g/mol 내지 1,000,000 g/mol인 공중합체.
- 청구항 1 내지 12 중 어느 한 항에 있어서,상기 공중합체의 분자량 분포는 1 내지 100인 공중합체.
- 제1 전극; 상기 제1 전극과 대향하여 구비되는 제2 전극; 및 상기 제1 전극과 상기 제2 전극 사이에 구비되고, 광활성층을 포함하는 1층 이상의 유기물층을 포함하고, 상기 유기물층 중 1층 이상은 청구항 1 내지 12 중 어느 하나의 항에 따른 공중합체를 포함하는 것인 유기 태양 전지.
- 청구항 15에 있어서,상기 유기물층은 정공 수송층, 정공 주입층 또는 정공 수송과 정공 주입을 동시에 하는 층을 포함하고,상기 정공 수송층, 정공 주입층 또는 정공 수송과 정공 주입을 동시에 하는 층은 상기 공중합체를 포함하는 유기 태양 전지.
- 청구항 15에 있어서,상기 유기물층은 전자주입층, 전자 수송층 또는 전자 주입과 전자 수송을 동시에 하는 층을 포함하고,상기 전자주입층, 전자 수송층 또는 전자 주입과 전자 수송을 동시에 하는 층은 상기 공중합체를 포함하는 유기 태양 전지.
- 청구항 15에 있어서,상기 광활성층은 전자 주개 및 전자 받개로 이루어진 군에서 선택되는 1 또는 2 이상을 포함하고,상기 전자 주개는 상기 공중합체를 포함하는 것인 유기 태양 전지.
- 청구항 18에 있어서,상기 전자 받개는 플러렌, 플러렌 유도체, 탄소 나노 튜브, 탄소 나노 튜브 유도체, 바소쿠프로인, 반도체성 원소, 반도체성 화합물 및 이들의 조합으로 이루어진 군에서 선택되는 것인 유기 태양 전지.
- 청구항 18에 있어서,상기 전자 주개 및 전자 받개는 벌크 헤테로 정션(BHJ)인 것인 유기 태양 전지.
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US20160155947A1 (en) | 2016-06-02 |
KR20150008806A (ko) | 2015-01-23 |
JP2016531171A (ja) | 2016-10-06 |
TWI548668B (zh) | 2016-09-11 |
CN105377941B (zh) | 2017-05-31 |
EP3009463A4 (en) | 2016-12-07 |
JP6174800B2 (ja) | 2017-08-02 |
EP3009463A1 (en) | 2016-04-20 |
KR101612609B1 (ko) | 2016-04-26 |
CN105377941A (zh) | 2016-03-02 |
TW201518336A (zh) | 2015-05-16 |
US9748489B2 (en) | 2017-08-29 |
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