Triazole-containing compound, application of triazole-containing compound, composition, adhesive film, preparation method and application of adhesive film, photovoltaic module and preparation method of photovoltaic module

Abstract

The invention relates to the field of solar cells, and discloses a triazole-containing compound and application thereof, a composition, an adhesive film and a preparation method and application thereof, and a photovoltaic module and a preparation method thereof. The compound has a structure as shown in a formula (I). The organic compound in the scheme provided by the invention not only can improve the light transmittance of visible light and strongly absorb ultraviolet light so as to convert the ultraviolet light into visible light and radiate the visible light, but also can have higher light transmittance in a visible light region so as to promote the absorption of the visible light by the solar cell and improve the photoelectric conversion efficiency. # imgabs0 #

Description

Technical Field

[0001] The present invention relates to the field of solar cells, and particularly to compounds containing triazole, their applications, compositions, adhesive films, their preparation methods and applications, and photovoltaic modules and their preparation methods. Background Art

[0002] With the deterioration of the environment, the radiation of ultraviolet rays on humans is increasing day by day. In the field of solar cells, some solar cell wafers are severely aged after being irradiated by ultraviolet light. Especially for heterojunction modules, their extremely high photoelectric conversion efficiency largely stems from the excellent surface passivation ability of intrinsic amorphous silicon to crystalline silicon. However, the drawback is that due to the absorption of ultraviolet light by the TCO film layer and the amorphous silicon film layer, the current of its battery is lower than that of ordinary batteries, resulting in power attenuation of the module.

[0003] Therefore, heterojunction modules have very high requirements for resisting ultraviolet rays. Although the ultraviolet light cutoff layer and ultraviolet light absorber can both block the radiation of ultraviolet light on the module, they also reduce the light conversion efficiency of the module. Therefore, in the photovoltaic field, it is not only necessary to prevent the radiation aging of solar cell modules by ultraviolet rays, but also to have a film layer with high light transmittance in the visible light region, while improving the photoelectric conversion efficiency of the battery module.

[0004] A light conversion agent is a product that can absorb light with negative gain to the product and convert it into light with positive gain. It is added to the adhesive film as an additive or auxiliary agent to form a light conversion film. It can not only absorb ultraviolet light, but also convert the absorbed ultraviolet light into visible light.

[0005] The functional principle of the light conversion agent is that after the material absorbs energy of a certain wavelength, electrons are excited to the excited state and are in a high-energy state. This energy can be transferred to the central ion, causing its electrons to transition from an unstable high-energy state back to a stable ground state. At the same time, during the return process, the energy is released in the form of light, thus realizing light conversion.

[0006] However, the visible light transmittance of the light conversion material in the existing encapsulation materials is low, the absorption of ultraviolet light is poor, and the efficiency of converting ultraviolet light into visible light is low. As a result, the improvement of the conversion efficiency of solar cells and the weather resistance of solar cells is limited.

[0007] Therefore, it is particularly urgent to develop an ultraviolet light conversion agent with high light transmittance, which can absorb ultraviolet light, efficiently convert it into visible light, and has high weather resistance. Summary of the Invention

[0008] The purpose of the present invention is to solve the problems in the prior art that the visible light transmittance of the light conversion agent is low, the light conversion material has poor absorption of ultraviolet light, and the efficiency of converting ultraviolet light into visible light is low.

[0009] To achieve the above object, a first aspect of the present invention provides an organic compound containing a triazole structure, and the organic compound has a structure shown in formula (I):

[0010]

[0011] Wherein, in formula (I),

[0012] L is a linking group connecting two benzotriazole structures, and X 1 and X 2 are present or absent; L is respectively connected to any position of the two benzotriazole structures capable of leaving H atoms, or L is respectively connected to any position of the two benzotriazole structures capable of leaving H atoms through X 1 and X 2 ;

[0013] L is a linking group provided by removing any two H atoms from at least one of alkanes of C 1-6 , cycloalkanes of C 3-6 , and aromatic compounds of C 6-30 containing or not containing heteroatoms of type A; optionally present on L is at least one substituent selected from combination A; the heteroatoms of type A are selected from at least one of N, O, S; the combination A consists of alkyl of C 1-12 , alkoxy of C 1-12 , and phenyl unsubstituted or substituted by R 6 ; R 6 is selected from at least one of alkyl of C 1-12 ;

[0014] Optionally present X 1 and X 2 are each independently selected from -N(R 1 )-, -C(R 2 ) 2 -, -C(O)-; R 1 and R 2 are each independently selected from alkyl of C 1-6 ;

[0015] R 1 and R 2 are the same or different, and are each independently selected from alkyl of C 1-30 unsubstituted or substituted by at least one group in combination B, alkoxy of C 1-30 unsubstituted or substituted by at least one group in combination B, cycloalkyl of C 3-12 unsubstituted or substituted by at least one group in combination B, and C 2-20 unsubstituted or substituted by at least one group in combination Bany one of alkenyl, phenyl which is unsubstituted or substituted by at least one group in combination B; the combination B consists of C 1-12 alkyl of, C 1-12 alkoxy of, cyano, -OC(O)-R 3 , -C(O)-R 3 , -N(R 4 R 5 ), C 3-12 cycloalkyl of, -S(O)-R 3 , phenyl, benzyl, thienyl, furyl, dibenzothienyl, triazinyl; R 3 , R 4 , R 5 each independently selected from C 1-6 alkyl of, benzyl, thienyl, furyl.

[0016] The second aspect of the present invention provides the application of the organic compound containing a triazole structure described in the first aspect in a film.

[0017] The third aspect of the present invention provides a composition for an ultraviolet light conversion encapsulation film, which contains a light conversion agent, and the light conversion agent contains the organic compound containing a triazole structure described in the first aspect.

[0018] The fourth aspect of the present invention provides a method for preparing an ultraviolet light conversion encapsulation film, which is carried out by using the components in the composition for an ultraviolet light conversion encapsulation film described in the third aspect, including: kneading and molding the material I containing the components in the composition in sequence to obtain the ultraviolet light conversion encapsulation film.

[0019] The fifth aspect of the present invention provides an ultraviolet light conversion encapsulation film obtained by the method for preparing an ultraviolet light conversion encapsulation film described in the fourth aspect.

[0020] The sixth aspect of the present invention provides the application of the ultraviolet light conversion encapsulation film described in the fifth aspect in a photovoltaic device.

[0021] The seventh aspect of the present invention provides a photovoltaic module, which contains a photovoltaic glass, an encapsulation film layer I, a battery cell, an encapsulation film layer II and a photovoltaic backplane stacked in sequence, and the materials forming the encapsulation film layer I and the encapsulation film layer II are each independently selected from at least one of the ultraviolet light conversion encapsulation films described in the fifth aspect.

[0022] The eighth aspect of the present invention provides a method for preparing the photovoltaic module described in the seventh aspect, which includes:

[0023] (1) Stack the photovoltaic glass, encapsulation adhesive film I, solar cell, encapsulation adhesive film II, and photovoltaic backsheet in sequence to obtain Intermediate I;

[0024] (2) Perform hot pressing treatment on the Intermediate I to obtain the photovoltaic module;

[0025] The encapsulation adhesive film I and the encapsulation adhesive film II are each independently selected from at least one of the ultraviolet light-converting encapsulation adhesive films described in the fifth aspect.

[0026] The organic compound in the solution provided by the present invention can not only improve the light transmittance of visible light, strongly absorb ultraviolet light, and then convert it into visible light and radiate it out, but also have a higher light transmittance in the visible light region, promote the absorption of visible light by the solar cell, and improve the photoelectric conversion efficiency.

[0027] When the organic compound in the solution provided by the present invention is added to the adhesive film and used as an ultraviolet light-converting encapsulation adhesive film in a solar cell module, it has the advantages of high visible light transmittance, good absorption of ultraviolet rays, and the ability to convert ultraviolet rays into visible light, thereby significantly improving the conversion efficiency and weather resistance of the solar photovoltaic module. Detailed Embodiments

[0028] In the ranges disclosed herein, the endpoints and any values are not limited to the exact ranges or values. These ranges or values should be understood to include values close to these ranges or values. For numerical ranges, between the endpoint values of each range, between the endpoint values of each range and individual point values, and between individual point values, they can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed herein.

[0029] In the present invention, without special explanation, similar groups of the same type have similar explanations, and the present invention will not repeat them one by one.

[0030] "X 1 and X 2 exist or not" means that X 1 and / or X 2 can exist or not. When X 1 and X 2 exist, the L group is connected to any position capable of leaving an H atom in the benzene rings of two benzotriazole structures through X 1 and X 2 respectively; and when X 1 and X 2 do not exist, the L group is directly connected to any position capable of leaving an H atom in the benzene ring structures of two benzotriazole structures.

[0031] "L is selected from C 1-6alkanes of C 3-6 cycloalkanes of C 6-30 "a linking group provided by removing any two H atoms from at least one substance selected from aromatic compounds of C 1-6 alkanes of C 3-6 cycloalkanes of C 6-30 aromatic compounds with or without heteroatoms of class A" means that in the substance providing the L linking group, one H atom is removed from each of two positions among any positions capable of removing H atoms to form a linking group; or two H atoms are removed from one position capable of removing two H atoms to form a linking group. Among them, the substance providing the L linking group can be selected from C 1-6 alkanes of C 3-6 cycloalkanes of C 6-30 aromatic compounds with or without heteroatoms of class A, or can be at least two selected from C 1-6 alkanes of C 3-6 cycloalkanes of C 6-30 aromatic compounds with or without heteroatoms of class A, or can be at least three selected from C 1-6 alkanes of C 1-6 When L contains at least one substituent selected from combination A, the carbon atoms in the substituent are not counted in the total number of carbon atoms of the L linking group defined above. Exemplarily, when L is a linking group provided by removing any two H atoms from alkanes of C 6-30 for example, when L is a methylene group, if there is a substituent on the methylene group, such as a phenyl substituent, the carbon number of the phenyl substituent is not counted in the total carbon number of the "alkanes of C 3-30 When L is a linking group provided by removing any two H atoms from at least one substance selected from aromatic compounds of C

[0032] C 3-6The cycloalkane representation refers to a cycloalkyl group provided by 3, 4, 5, or 6 carbon atoms as ring-forming atoms.

[0033] C 1-12 The alkyl representation refers to a straight-chain alkyl group or a branched-chain alkyl group with a total of 1 - 12 carbon atoms (for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 carbon atoms).

[0034] C 1-12 The alkoxy representation refers to a straight-chain alkoxy group or a branched-chain alkoxy group with a total of 1 - 12 carbon atoms (for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 carbon atoms).

[0035] In the present invention, the group provided by "phenyl-substituted benzene" as a linking group and the group provided by "biphenyl" as a linking group are different concepts. The group provided by "phenyl-substituted benzene" as a linking group means that H atoms at any two sites on the benzene that can leave are removed, and this benzene structure is connected to the parent nucleus structure as a linking group, and this benzene structure contains a substituent phenyl; while the group provided by "biphenyl" as a linking group means that in the two benzene structures of biphenyl, H atoms at one site on each benzene that can leave are removed, so that this biphenyl structure is connected to the parent nucleus structure as a linking group.

[0036] C 3-30 The aromatic compound representation refers to an aromatic compound with a total of 3 - 30 carbon atoms, for example, it can be 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30; including but not limited to benzene, biphenyl, terphenyl, naphthalene, anthracene, phenanthrene, etc.

[0037] As mentioned above, the alkenyl group represented in the present invention refers to a group in which the substituent contains at least one carbon-carbon double bond structure, and there is no special requirement for the position of this carbon-carbon double bond structure, which can be located at the end of the substituent or connected to the parent nucleus structure through this carbon-carbon double bond structure. For example, "C 2-20 The alkenyl group" refers to an alkenyl group with a total of 2 - 20 carbon atoms, for example, it can be 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, and any position can contain 1 or more than 2 carbon-carbon double bond structures.

[0038] As described above, the first aspect of the present invention provides an organic compound containing a triazole structure, and this organic compound has the structure shown in formula (I).

[0039] Preferably, in formula (I),

[0040] L is a linking group connecting two benzotriazole structures, X 1 and X 2 are present or absent; L is respectively connected to any position of the two benzotriazole structures capable of leaving an H atom, or L is respectively connected to any position of the two benzotriazole structures capable of leaving an H atom through X 1 and X 2 ;

[0041] L is a linking group provided by removing any two H atoms from at least one substance selected from alkanes of C 1-6 , cycloalkanes of C 3-6 , benzene, biphenyl, naphthalene, anthracene, phenanthrene, terphenyl, dibenzofuran, pyridine, pyrimidine, triazine, benzothiazole, 9,9-dimethylfluorene, 9,9-diphenylfluorene, dibenzothiophene, pyrene, perylene, spirobifluorene; at least one substituent selected from the group A is optionally present on L; the group A consists of alkyl of C 1-10 , alkoxy of C 1-10 , phenyl which is unsubstituted or substituted by R 6 ; R 6 is selected from at least one of alkyl of C 1-12 ;

[0042] Optionally present X 1 and X 2 are each independently selected from -N(R 1 )-, -C(R 2 ) 2 -, -C(O)-; R 1 and R 2 are each independently selected from one of alkyl of C 1-6 ;

[0043] R 1 and R 2 are the same or different, and are each independently selected from alkyl of C 1-24 which is unsubstituted or substituted by at least one group in the group B, alkoxy of C 1-24 which is unsubstituted or substituted by at least one group in the group B, cycloalkyl of C 3-10 which is unsubstituted or substituted by at least one group in the group B, alkenyl of C 2-16 which is unsubstituted or substituted by at least one group in the group B, phenyl which is unsubstituted or substituted by at least one group in the group B; the group B consists of alkyl of C 1-12 , alkoxy of C 1-12 , cyano, -OC(O)-R 3 , -C(O)-R 3 , -N(R 4 R 5 ), C3-12 is composed of cycloalkyl, -S(O)-R 3 , phenyl, benzyl, thienyl, furyl, dibenzothienyl, triazinyl; R 3 , R 4 , R 5 are each independently selected from one of C 1-6 alkyl, benzyl, thienyl, furyl.

[0044] More preferably, in formula (I),

[0045] L is a linking group connecting two benzotriazole structures, and X 1 and X 2 do not exist; L is connected to any position capable of leaving an H atom in the two benzotriazole structures respectively;

[0046] L is a linking group provided by removing any two H atoms from at least one substance selected from C 1-6 alkanes, C 3-6 cycloalkanes, benzene, biphenyl, naphthalene, anthracene, phenanthrene, terphenyl, dibenzofuran, pyridine, pyrimidine, triazine, benzothiazole, 9,9-dimethylfluorene, 9,9-diphenylfluorene, dibenzothiophene, pyrene, perylene, spirobifluorene; at least one substituent selected from combination A is optionally present on L; the combination A is composed of C 1-10 alkyl, C 1-10 alkoxy, phenyl which is unsubstituted or substituted by R 6 ; R 6 is selected from at least one of C 1-12 alkyl;

[0047] R 1 and R 2 are the same or different and are each independently selected from C 1-24 alkyl which is unsubstituted or substituted by at least one group in combination B, C 1-24 alkoxy which is unsubstituted or substituted by at least one group in combination B, C 3-10 cycloalkyl which is unsubstituted or substituted by at least one group in combination B, C 2-16 alkenyl which is unsubstituted or substituted by at least one group in combination B, phenyl which is unsubstituted or substituted by at least one group in combination B; the combination B is composed of C 1-12 alkyl, C 1-12 alkoxy, cyano, -OC(O)-R 3 , -C(O)-R 3 , -N(R 4 R 5 ), C 3-12 cycloalkyl, -S(O)-R 3, phenyl, benzyl, thienyl, furyl, dibenzothienyl, triazinyl; R 3 , R 4 , R 5 Each independently selected from C 1-6 alkyl, benzyl, thienyl, furyl.

[0048] According to a particularly preferred specific embodiment, the organic compound represented by formula (I) is selected from any one of compound 1 to compound 33, compound 35 to compound 41, compound 43, compound 45 to compound 52, compound 57 to compound 85, compound 87 to compound 110, compound 112 to compound 155.

[0049] Preferably, in formula (I),

[0050] L is a linking group connecting two benzotriazole structures, X 1 and X 2 do not exist; L is respectively connected to any position capable of leaving an H atom of the two benzotriazole structures;

[0051] L is a linking group provided by removing any two H atoms from at least one substance selected from C 1-6 alkanes, C 3-6 cycloalkanes, benzene, biphenyl, naphthalene, anthracene, phenanthrene, terphenyl, dibenzofuran, pyridine, pyrimidine, triazine, benzothiazole, 9,9-dimethylfluorene, 9,9-diphenylfluorene, dibenzothiophene, pyrene, perylene, spirobifluorene; at least one substituent selected from combination A is optionally present on L; the combination A consists of C 1-10 alkyl, C 1-10 alkoxy, phenyl which is unsubstituted or substituted by R 6 ; R 6 is selected from at least one of C 1-12 alkyl;

[0052] R 1 and R 2 are the same, and are selected from C 1-24 alkyl which is unsubstituted or substituted by at least one group in combination B, C 1-24 alkoxy which is unsubstituted or substituted by at least one group in combination B, C 3-10 cycloalkyl which is unsubstituted or substituted by at least one group in combination B, C 2-16 alkenyl which is unsubstituted or substituted by at least one group in combination B, phenyl which is unsubstituted or substituted by at least one group in combination B; the combination B consists of C 1-12 alkyl, C 1-12 alkoxy, cyano, -OC(O)-R 3, -C(O)-R 3 , -N(R 4 R 5 ), C 3-12 's cycloalkyl group, -S(O)-R 3 , phenyl, benzyl, thienyl, furyl, dibenzothienyl, triazinyl; R 3 , R 4 , R 5 are each independently selected from an alkyl group of C 1-6 , benzyl, thienyl, and furyl.

[0053] According to another particularly preferred specific embodiment, the organic compound represented by formula (I) is selected from any one of Compound 1 to Compound 19, Compound 21 to Compound 33, Compound 35, Compound 37 to Compound 41, Compound 43, Compound 45 to Compound 52, Compound 57 to Compound 73, Compound 75 to Compound 85, Compound 87 to Compound 100, Compound 102, Compound 104 to Compound 110, and Compound 112 to Compound 155.

[0054] Particularly preferably, in formula (I),

[0055] L is a linking group connecting two benzotriazole structures, and X 1 and X 2 do not exist; L is connected to any position capable of leaving an H atom of the two benzotriazole structures respectively;

[0056] L is a linking group provided by removing any two H atoms from at least one substance selected from benzene, biphenyl, naphthalene, anthracene, phenanthrene, terphenyl, pyrene, and perylene; optionally, at least one substituent selected from combination A exists on L; the combination A consists of an alkyl group of C 1-10 , an alkoxy group of C 1-10 , and a phenyl group which is unsubstituted or substituted by R 6 ; R 6 is selected from at least one of an alkyl group of C 1-12 ;

[0057] R 1 and R 2 are the same and are selected from an alkyl group of C 1-24 which is unsubstituted or substituted by at least one group in combination B, an alkoxy group of C 1-24 which is unsubstituted or substituted by at least one group in combination B, a cycloalkyl group of C 3-10 which is unsubstituted or substituted by at least one group in combination B, an alkenyl group of C 2-16 which is unsubstituted or substituted by at least one group in combination B, and a phenyl group which is unsubstituted or substituted by at least one group in combination B; the combination B consists of C1-12 alkyl, C 1-12 alkoxy, cyano, -OC(O)-R 3 , -C(O)-R 3 , -N(R 4 R 5 ), C 3-12 cycloalkyl, -S(O)-R 3 , phenyl, benzyl, thienyl, furyl, dibenzothienyl, triazinyl; R 3 , R 4 , R 5 each independently selected from C 1-6 alkyl, benzyl, thienyl, furyl.

[0058] According to another particularly preferred embodiment, the organic compound represented by formula (I) is selected from any one of Compound 1 to Compound 19, Compound 21 to Compound 33, Compound 37 to Compound 41, Compound 43, Compound 49 to Compound 51, Compound 61 to Compound 73, Compound 75 to Compound 85, Compound 89 to Compound 100, Compound 102, Compound 104, Compound 106 to Compound 110, Compound 113 to Compound 116, Compound 125 to Compound 138, Compound 140 to Compound 151, and Compound 155.

[0059] According to another preferred embodiment of the present invention, the organic compound represented by formula (I) is selected from any one of the following:

[0060]

[0061]

[0062]

[0063]

[0064]

[0065]

[0066]

[0067]

[0068] The organic compound provided by the present invention, when used as an ultraviolet light conversion agent, is used to prepare an ultraviolet light conversion encapsulation film, and the ultraviolet light conversion encapsulation film can significantly reduce the transmittance of ultraviolet light.

[0069] Meanwhile, the photoelectric conversion efficiency of the photovoltaic module including the ultraviolet light conversion encapsulation adhesive film provided by the present invention is significantly improved, and the yellowing index of the ultraviolet light conversion encapsulation adhesive film containing this organic compound is relatively low. Therefore, during use, it can better maintain its ultraviolet light absorption performance, thereby improving the weather resistance of the photovoltaic module.

[0070] The present invention does not particularly limit the specific method for preparing the foregoing organic compound. Those skilled in the art can obtain the foregoing compound of the present invention based on the specific structural formula provided by the present invention and in combination with the known knowledge in the field of organic synthesis. Moreover, several examples are exemplarily listed in the following text of the present invention to illustrate the preparation method of the organic compound of the present invention. Those skilled in the art can also obtain the specific preparation methods of all the remaining organic compounds by replacing the types of raw materials according to the preparation method of the organic compound in the following text of the present invention. The present invention will not elaborate on the preparation methods of all organic compounds, and those skilled in the art should not construe this as a limitation of the present invention.

[0071] As described above, the second aspect of the present invention provides the application of the organic compound containing a triazole structure described in the first aspect in an adhesive film.

[0072] Preferably, the adhesive film is an encapsulation adhesive film. More preferably, the adhesive film is a light conversion encapsulation adhesive film. Particularly preferably, the adhesive film is an ultraviolet light conversion encapsulation adhesive film.

[0073] As described above, the third aspect of the present invention provides a composition for an ultraviolet light conversion encapsulation adhesive film. The composition contains a light conversion agent, and the light conversion agent contains the organic compound containing a triazole structure described in the first aspect.

[0074] Preferably, the composition further contains a matrix material and at least one auxiliary agent selected from photoinitiators, light stabilizers, crosslinking agents, co-crosslinking agents, antioxidants, and silane coupling agents; relative to 100 parts by weight of the matrix material, the content of the light conversion agent is 0.005 - 2 parts, the content of the photoinitiator is 0 - 2 parts by weight, the content of the light stabilizer is 0.1 - 1 part, the content of the crosslinking agent is 0 - 3 parts, the content of the co-crosslinking agent is 0 - 2 parts, the content of the antioxidant is 0.05 - 1 part, and the content of the silane coupling agent is 0.2 - 1 part.

[0075] More preferably, relative to 100 parts by weight of the matrix material, the content of the light conversion agent is 0.01-1 part, the content of the photoinitiator is 0.1-2 parts by weight, the content of the light stabilizer is 0.1-1 part, the content of the crosslinking agent is 0.1-3 parts, the content of the co-crosslinking agent is 0.1-2 parts, the content of the antioxidant is 0.05-1 part, and the content of the silane coupling agent is 0.2-1 part.

[0076] Preferably, the matrix material is an ethylene copolymer.

[0077] More preferably, the matrix material is selected from at least one of ethylene-vinyl acetate copolymer, ethylene-butene copolymer, ethylene-octene copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-vinyl acetate-based terpolymer, ethylene-methyl acrylate-based terpolymer, ethylene-ethyl acrylate-based terpolymer, ethylene-methyl methacrylate-based terpolymer, ethylene-ethyl methacrylate-based terpolymer, and ethylene-α-olefin copolymer.

[0078] Particularly preferably, the matrix material is ethylene-vinyl acetate copolymer.

[0079] According to a particularly preferred specific embodiment, the matrix material is ethylene-vinyl acetate copolymer, and the content of the vinyl acetate structural unit in the ethylene-vinyl acetate copolymer is 25-35 wt%, the melt index of the ethylene-vinyl acetate copolymer is 0.1-40 g / min, the melting point is 40-90 °C, and the light transmittance is ≥90%.

[0080] Preferably, the photoinitiator is selected from any one or a mixture of at least two of 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, benzophenone, (2,4,6-trimethylbenzoyl) diphenylphosphine oxide, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl) butan-1-one, 2-hydroxy-2-methyl-1-phenylpropan-1-one (2-hydroxy-1-(4-(2-hydroxy-2-methylpropanoyl)phenyl) benzyl)-2-methyl-1-propanone, titanocene photoinitiators, thioxanthone / iodonium salt systems, organic peroxide systems, borate / dye systems, hexarylbisimidazole / dye systems, coumarinone / dye systems, benzil ketal photoinitiators, acetophenone photoinitiators, anthraquinone photoinitiators and their derivatives, benzoate photoinitiators, bicyclic diketone compounds, and camphorquinone.

[0081] Preferably, the light stabilizer is selected from bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, 2-(2'-hydroxy-5'-methylphenyl) benzotriazole, bis(1,2,2,6,6-pentamethyl-4-piperidyl) [[3,5-di-tert-butyl-4-hydroxyphenyl] methyl] butylmalonate, bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, 2,4-dichloro-6-(4-morpholinyl)-1,3,5-triazine, or a mixture of at least two of them.

[0082] Preferably, the crosslinking agent is selected from tert-butyl peroxy-2-ethylhexyl carbonate, tert-butyl peroxy-isopropyl carbonate, cyclohexanone peroxide, tert-butyl hydroperoxide, dicumyl peroxide, di(tert-butyl peroxyisopropyl) benzene, benzoyl peroxide, di(2,4-dichlorobenzoyl) peroxide, tert-butyl peroxybenzoate, tert-butyl peroxy-2-ethylhexyl carbonate, tert-butyl peroxyacetate, tert-butyl peroxy-3,5,5-trimethylhexanoate, bis(4-tert-butylcyclohexanone) peroxydicarbonate, tert-amyl peroxy-2-ethylhexyl carbonate, 2,5-dimethyl-2,5-bis(tert-butylperoxy) hexane, 1,1-di-tert-butylperoxycyclohexane, 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, or a mixture of at least two of them.

[0083] Preferably, the co-crosslinking agent is selected from triallyl isocyanurate, ethylene glycol dimethacrylate, N,N'-m-phenylenebismaleimide, trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, propoxylated glycerol triacrylate, and ethoxylated pentaerythritol tetraacrylate, or a mixture of at least two of them.

[0084] Preferably, the antioxidant is selected from 2,6-di-tert-butyl-p-cresol, bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite, distearyl pentaerythritol diphosphite, isooctyl β-(3,5-di-tert-butyl-4-hydroxybenzyl) propionate, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanuric acid, n-octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, pentaerythritol tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate), 2,2'-methylenebis(4-methyl-6-tert-butylphenol), tetrakis(2,4-di-tert-butylphenyl-4,4'-biphenyl) diphosphite, tris(2,4-di-tert-butylphenyl) phosphite, and tris(nonylphenyl) phosphite, or a mixture of at least two of them.

[0085] Preferably, the silane coupling agent is selected from one or a mixture of at least two of vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris(2-methoxyethoxy)silane, 3-triethoxysilyl-1-propylamine, (triethoxysilyl)ethylene, γ-glycidoxypropyltrimethoxysilane, vinyltrichlorosilane, γ-methacryloxypropyltrimethoxysilane, γ-methacryloxypropyltriisopropoxysilane, 3-mercaptopropyltrimethoxysilane, and 3-mercaptopropyltriethoxysilane.

[0086] As described above, the fourth aspect of the present invention provides a method for preparing an ultraviolet light-converting encapsulating film, which is carried out by using the components in the composition for the ultraviolet light-converting encapsulating film described in the third aspect, including: successively kneading and molding the material I containing the components in the composition to obtain the ultraviolet light-converting encapsulating film.

[0087] Preferably, the method includes: uniformly mixing a matrix material, an ultraviolet light converter, a light stabilizer, a crosslinking agent, a co-crosslinking agent, an antioxidant, and a silane coupling agent, and then successively kneading and casting to obtain the ultraviolet light-converting encapsulating film.

[0088] Preferably, the casting process is carried out in a casting machine, and the ultraviolet light-converting encapsulating film is obtained through plasticizing extrusion, stretching, traction, and winding.

[0089] Preferably, the conditions for kneading include: a kneading temperature of 70°C - 120°C; a kneading time of 10 min - 40 min; and a stirring speed of 100 rpm - 300 rpm.

[0090] As described above, the fifth aspect of the present invention provides an ultraviolet light-converting encapsulating film obtained by the method for preparing an ultraviolet light-converting encapsulating film described in the fourth aspect.

[0091] Preferably, the thickness of the ultraviolet light-converting encapsulating film is 0.3 mm - 0.8 mm. Particularly preferably, the thickness of the ultraviolet light-converting encapsulating film is 0.5 mm.

[0092] As described above, the sixth aspect of the present invention provides the application of the ultraviolet light-converting encapsulating film described in the fifth aspect in a photovoltaic device.

[0093] As described above, the seventh aspect of the present invention provides a photovoltaic module, which contains a photovoltaic glass, an encapsulating film layer I, a cell, an encapsulating film layer II, and a photovoltaic backplane that are sequentially stacked, and the materials forming the encapsulating film layer I and the encapsulating film layer II are each independently selected from at least one of the ultraviolet light-converting encapsulating films described in the fifth aspect.

[0094] As mentioned above, the eighth aspect of the present invention provides a method for preparing the photovoltaic module described in the seventh aspect, the method comprising:

[0095] (1) stacking photovoltaic glass, encapsulation film I, solar cell, encapsulation film II and photovoltaic backsheet in sequence to obtain intermediate I;

[0096] (2) subjecting the intermediate I to a hot pressing treatment to obtain the photovoltaic module;

[0097] The packaging film I and the packaging film II are each independently selected from at least one of the ultraviolet light conversion packaging films described in the fifth aspect.

[0098] Preferably, in step (2), the conditions of the hot pressing treatment include: a heating temperature of 80-170° C., a pressing pressure of 40 KPa-70 KPa, and a pressing time of 15-30 min.

[0099] The present invention will be described in detail below by way of examples.

[0100] In the following examples, if no specific experimental steps or conditions are specified, the experiments can be carried out according to the known experimental steps or conditions described in the literature in the field. The reagents or instruments used, if no manufacturer is specified, are all conventional reagent products that can be obtained commercially.

[0101] Unless otherwise specified, the room temperature mentioned below means 25±1°C.

[0102] The ethylene-vinyl acetate copolymer used in the present invention has a vinyl acetate structural unit content of 28 wt %, a melt index of 20 g / 10 min (under 190° C. / 2.16 kg test conditions), and a melting point of 75° C.

[0103] Preparation Example 1: Synthesis of Intermediate 12-1

[0104]

[0105] Synthesis of intermediate 12-1: Dissolve 0.1 mol of 5-chloro-2H-benzo[1,2,3]triazole in 120 ml of toluene, add 0.1 mol of isobutane bromide, 0.25 mol of sodium tert-butoxide, 0.3 mmol of tri(dibenzylideneacetone)dipalladium, and 0.3 mmol of tri-tert-butylphosphine, stir under nitrogen, and heat to reflux. After 4 hours, the reaction of the raw materials is detected to be complete, the reaction solution is decompressed and dried, and the compound intermediate 12-1 is obtained by column chromatography.

[0106] (Yield: 67.1%).

[0107] Preparation Example 2: Synthesis of Intermediate 13-1

[0108]

[0109] Synthesis of Intermediate 13-1: The synthesis method was the same as that of Intermediate 12-1, and Intermediate 13-1 was obtained (yield: 71.0%).

[0110] Preparation Example 3: Synthesis of Intermediate 21-1

[0111]

[0112] Synthesis of Intermediate 21-1: 0.1 mol of 5-chloro-2H-benzotriazole was dissolved in 500 ml of THF solvent at 50 °C, 0.3 mol of potassium tert-butoxide and 0.2 mol of methyl iodide were added, and the reaction was carried out at 50 °C for 2 h. HPLC detected that the raw materials had basically reacted completely, the reaction was stopped, and after cooling, most of the solvent was removed by rotary evaporation under reduced pressure. Deionized water was added to the mixture, filtered, and the solid was washed with methanol and dried to obtain Intermediate 21-1 (yield: 96%).

[0113] Preparation Example 4: Synthesis of Intermediate 48-1

[0114]

[0115] Synthesis of Intermediate 48-1: The synthesis method was the same as that of Intermediate 12-1, and Compound 48-1 was obtained (yield: 74.0%).

[0116] Preparation Example 5: Synthesis of Intermediate 121-1

[0117]

[0118] Synthesis of Intermediate 121-1: The synthesis method was the same as that of Intermediate 12-1, and Intermediate 121-1 was obtained (yield: 72.0%).

[0119] Preparation Example 6: Synthesis of Compound 12

[0120]

[0121] Synthesis of Compound 12: 0.15 mol of Intermediate 12-1 was dissolved in 300 ml of toluene solvent, nitrogen was introduced and stirred, 0.07 mol of 1,4-benzenediboronic acid, 0.35 mol of potassium carbonate, and 0.04 mmol of tetrakis(triphenylphosphine)palladium were added in sequence, and the temperature was raised to reflux. After 4 h, HPLC detected that the raw materials had basically reacted completely, the reaction was stopped, and after cooling, the crude product was obtained by filtration. It was completely soluble in toluene, the filtrate was evaporated to dryness under reduced pressure, and the residue was obtained by column chromatography to obtain Compound 12 (yield: 76.5%).

[0122] Mass spectrometry: C26H28N6, theoretical value: 424.24, measured value: 424.25. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 0.87 - 0.94 (12H, d), 1.97 - 2.13 (2H, m), 4.96 - 5.05 (4H, m), 7.23 - 7.26 (4H, s), 7.82 - 7.87 (2H, m), 8.13 - 8.17 (2H, d), 8.22 - 8.30 (2H, d).

[0123] Preparation Example 7: Synthesis of Compound 13

[0124]

[0125] Synthesis of Compound 13: The synthesis method was the same as that of Compound 12, and Compound 13 was obtained (yield: 71.0%).

[0126] Mass spectrometry: C24H20N6O4, theoretical value: 456.15, measured value: 456.17. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 2.07 - 2.11 (6H, s), 7.04 - 7.09 (4H, d), 7.23 - 7.26 (4H, s), 7.83 - 7.87 (2H, m), 8.13 - 8.17 (2H, d), 8.30 - 8.32 (2H, d).

[0127] Preparation Example 8: Synthesis of Compound 21

[0128]

[0129] Synthesis of Compound 21: The synthesis method was the same as that of Compound 12, and Compound 21 was obtained (yield: 69.7%).

[0130] Mass spectrometry: C26H20N6, theoretical value: 416.17, measured value: 416.16. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 4.43 - 4.47 (6H, s), 7.23 - 7.27 (8H, s), 7.82 - 7.87 (2H, m), 8.13 - 8.17 (2H, d), 8.30 - 8.32 (2H, d).

[0131] Preparation Example 9: Synthesis of Compound 24

[0132]

[0133] Synthesis of Intermediate 24-1: The synthesis method was the same as that of Compound 12, and Intermediate 24-1 was obtained (yield: 73.7%).

[0134] Synthesis of Compound 24: The synthesis method is the same as that of Compound 12, and Compound 24 is obtained (yield: 71.7%).

[0135] Mass spectrometry: C40H28N6, theoretical value: 592.24, measured value: 592.25. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 4.46 - 4.50 (6H, s), 7.23 - 7.29 (8H, m), 7.32 - 7.34 (4H, s), 7.84 - 7.88 (2H, m), 8.13 - 8.16 (2H, d), 8.31 - 8.33 (2H, d), 8.98 - 9.02 (4H, m).

[0136] Preparation Example 10: Synthesis of Compound 48

[0137]

[0138] Synthesis of Compound 48: The synthesis method is the same as that of Compound 12, and Compound 48 is obtained (yield: 71.6%).

[0139] Mass spectrometry: C25H27N7, theoretical value: 425.23, measured value: 425.25. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 0.84 - 0.93 (6H, m), 1.19 - 1.34 (4H, m), 1.89 - 2.01 (4H, m), 4.10 - 5.21 (4H, m), 6.71 - 6.77 (2H, d), 7.14 - 7.22 (1H, m), 8.10 - 8.18 (4H, m), 8.60 - 8.65 (2H, d).

[0140] Preparation Example 11: Synthesis of Compound 55

[0141]

[0142] Synthesis of Compound 55: The synthesis method is the same as that of Compound 12, and Compound 55 is obtained (yield: 73.2%).

[0143] Mass spectrometry: C23H30N6, theoretical value: 390.25, measured value: 390.21. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 0.85 - 0.93 (6H, m), 1.19 - 1.33 (4H, m), 1.67 - 1.71 (6H, s), 1.88 - 2.01 (4H, m), 4.08 - 4.19 (4H, m), 7.78 - 7.85 (4H, m), 8.13 - 8.15 (2H, m).

[0144] Preparation Example 12: Synthesis of Compound 66

[0145]

[0146] Synthesis of Compound 66: The synthesis method was the same as that of Compound 12, and Compound 66 was obtained (yield: 69.9%).

[0147] Mass spectrometry: C30H30N6, theoretical value: 474.25, measured value: 474.26. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 0.87 - 0.94 (12H, d), 1.97 - 2.13 (2H, m), 4.98 - 5.07 (4H, m), 7.23 - 7.30 (2H, m), 7.32 - 7.34 (2H, s), 7.83 - 7.88 (2H, m), 8.13 - 8.17 (2H, s), 8.30 - 8.33 (2H, s), 8.96 - 9.04 (2H, m).

[0148] Preparation Example 13: Synthesis of Compound 94

[0149]

[0150] Synthesis of Compound 94: The synthesis method was the same as that of Compound 12, and Compound 94 was obtained (yield: 71.4%).

[0151] Mass spectrometry: C34H32N6, theoretical value: 524.27, measured value: 524.30. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 0.88 - 0.93 (12H, d), 2.01 - 2.09 (2H, m), 5.00 - 5.08 (4H, m), 7.41 - 7.45 (4H, m), 7.92 - 7.95 (2H, m), 8.13 - 8.16 (2H, d), 8.19 - 8.23 (4H, m), 8.37 - 8.39 (2H, d).

[0152] Preparation Example 14: Synthesis of Compound 113

[0153]

[0154] Synthesis of Intermediate 113-1: 0.06 mol of Intermediate 48-1 was dissolved in 350 ml of 1,4-dioxane solvent, stirred under nitrogen, and 0.06 mol of bis(pinacolato)diboron, 0.15 mol of potassium acetate, and 0.18 mmol of ferrocenedichloropalladium were added sequentially. The temperature was raised to reflux for reaction. After 4 h, HPLC detection showed that the raw materials had basically reacted completely, and the reaction was stopped. The reaction solution was rotary evaporated under reduced pressure, and the residue was obtained as Intermediate 113-1 by column chromatography (yield: 76.9%).

[0155] Synthesis of Compound 113: The synthesis method was the same as that of Compound 12, and Compound 113 was obtained (yield: 71.3%).

[0156] Mass spectrometry: C34H32N6, theoretical value: 524.27, measured value: 524.30. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 0.85 - 0.93 (6H, m), 1.18 - 1.34 (4H, m), 1.88 - 2.02 (4H, m), 4.09 - 4.21 (4H, m), 7.58 - 7.74 (4H, m), 7.91 - 7.97 (2H, m), 8.12 - 8.20 (4H, m), 8.34 - 8.38 (2H, d), 9.05 - 9.11 (2H, m).

[0157] Preparation Example 15: Synthesis of Compound 117

[0158]

[0159] Synthesis of Compound 117: The synthesis method was the same as that of Compound 12, and Compound 117 was obtained (yield: 73.1%).

[0160] Mass spectrometry: C32H30N6O, theoretical value: 514.25, measured value: 514.23. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 0.87 - 0.94 (12H, d), 1.97 - 2.13 (2H, m), 4.95 - 5.05 (4H, m), 7.60 - 7.72 (4H, m), 7.86 - 7.91 (2H, m), 8.13 - 8.17 (2H, d), 8.23 - 8.26 (2H, d), 8.34 - 8.36 (2H, d).

[0161] Preparation Example 16: Synthesis of Compound 121

[0162]

[0163] Synthesis of Compound 121: The synthesis method was the same as that of Compound 12, and Compound 121 was obtained (yield: 69.8%).

[0164] Mass spectrometry: C47H44N6, theoretical value: 692.36, measured value: 692.35. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 0.87 - 0.94 (12H, d), 1.51 - 1.67 (2H, m), 1.70 - 1.81 (4H, m), 4.05 - 4.24 (4H, m), 7.07 - 7.30 (10H, m), 7.75 - 7.87 (4H, m), 8.07 - 8.17 (4H, m), 8.21 - 8.23 (2H, d), 8.29 - 8.32 (2H, d).

[0165] Preparation Example 17: Synthesis of Compound 126

[0166]

[0167] Synthesis of Intermediate 126-1: The synthesis method is the same as that of Compound 113-1, and Intermediate 126-1 is obtained (yield: 68.4%).

[0168] Synthesis of Compound 126: The synthesis method is the same as that of Compound 12, and Compound 126 is obtained (yield: 71.2%).

[0169] Mass spectrometry: C34H44N6, theoretical value: 536.36, measured value: 536.3. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 0.84 - 0.96 (12H, d), 1.28 - 1.41 (18H, s), 1.93 - 2.15 (2H, m), 4.91 - 5.06 (4H, m), 7.71 - 7.78 (2H, d), 8.00 - 8.07 (2H, s), 8.11 - 8.25 (4H, m).

[0170] Preparation Example 18: Synthesis of Compound 131

[0171]

[0172] Synthesis of Intermediate 131-1: The synthesis method is the same as that of Compound 12, and Compound 131-1 is obtained (yield: 70.3%).

[0173] Synthesis of Compound 131: The synthesis method is the same as that of Compound 12, and Compound 131 is obtained (yield: 72.3%).

[0174] Mass spectrometry: C36H40N6, theoretical value: 556.76, measured value: 556.7. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 0.83 - 0.96 (12H, d), 1.29 - 1.37 (9H, s), 1.95 - 2.15 (2H, m), 4.91 - 5.07 (4H, m), 7.34 - 7.50 (4H, m), 7.84 - 7.92 (2H, s), 8.12 - 8.35 (7H, m).

[0175] Preparation Example 19: Synthesis of Compound 141

[0176]

[0177] Synthesis of Intermediate 141-1: The synthesis method is the same as that of Compound 113-1, and Intermediate 141-1 is obtained (yield: 70.4%).

[0178] Synthesis of Intermediate 141-2: The synthesis method is the same as that of Compound 12, and Intermediate 141-2 is obtained (yield: 69.4%).

[0179] Synthesis of Compound 141: The synthesis method is the same as that of Compound 12, and Compound 141 is obtained (yield: 72.3%).

[0180] Mass spectrometry: C38H46N6, theoretical value: 586.83, measured value: 586.8. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 0.84 - 0.96 (12H, d), 1.35 - 1.46 (18H, s), 1.95 - 2.14 (2H, m), 4.94 - 5.08 (4H, m), 6.98 - 7.09 (2H, m), 7.81 - 7.91 (2H, m), 8.11 - 8.18 (2H, d), 8.28 - 8.33 (2H, m), 8.72 - 8.82 (2H, m).

[0181] Preparation Example 20: Synthesis of Compound 146

[0182]

[0183] Synthesis of Intermediate 146-1: The synthesis method is the same as that of Compound 113-1, and Intermediate 146-1 is obtained (yield: 72.4%).

[0184] Synthesis of Compound 146: The synthesis method is the same as that of Compound 12, and Compound 146 is obtained (yield: 71.8%).

[0185] Mass spectrometry: C38H40N6, theoretical value: 580.78, measured value: 580.7. 1H-NMR (400 MHz, CDCl3) (ppm) δ = 0.86 - 0.95 (12H, d), 1.43 - 1.50 (9H, s), 1.95 - 2.14 (2H, m), 4.97 - 5.11 (4H, m), 7.38 - 7.58 (3H, m), 7.72 - 7.77 (1H, d), 7.89 - 8.00 (3H, m), 8.10 - 8.24 (4H, m), 8.35 - 8.42 (2H, m).

[0186] Encapsulation film examples:

[0187] The preparation method of the encapsulation film includes the following steps:

[0188] Mix the matrix material, ultraviolet light converter, photoinitiator, light stabilizer, crosslinking agent, co-crosslinking agent, antioxidant and silane coupling agent evenly in a mixing kettle, then put them into a twin-screw extruder, mix at 90 °C with a rotation speed of 200 rpm, and then through plasticizing extrusion, stretching, traction and winding in a casting machine to obtain an ultraviolet light conversion encapsulation film with a thickness of 0.5 mm;

[0189] Encapsulation film example 1:

[0190] This example provides an ultraviolet light conversion encapsulation film, which is prepared by the above preparation method, wherein the matrix material is 100 g of ethylene-vinyl acetate copolymer, the ultraviolet light converter is 0.1 g of compound 12, the photoinitiator is 1 g of 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butanone, the light stabilizer is 0.1 g of bis(2,2,6,6-tetramethylpiperidinyl) sebacate, the crosslinking agent is 0.5 g of dicumyl peroxide, the co-crosslinking agent is 0.5 g of triallyl isocyanurate, the antioxidant is 0.05 g of tris(nonylphenyl) phosphite, and the silane coupling agent is 0.2 g of 3-mercaptopropyltriethoxysilane.

[0191] Encapsulation film example 2:

[0192] This example provides an ultraviolet light conversion encapsulation film, which is prepared by the same method as in encapsulation film example 1, and the difference is that:

[0193] The ultraviolet light converter in this example is 0.05 g of compound 12.

[0194] The rest are the same as those in encapsulation film example 1.

[0195] Encapsulation film example 3:

[0196] This embodiment provides an ultraviolet light-converting encapsulation film, which is prepared by the same method as in Embodiment 1 of the encapsulation film, except that:

[0197] The ultraviolet light-converting agent in this embodiment is 0.3 g of Compound 12.

[0198] The rest are the same as those in Embodiment 1 of the encapsulation film.

[0199] Encapsulation Film Embodiment 4:

[0200] This embodiment provides an ultraviolet light-converting encapsulation film, which is prepared by the same method as in Embodiment 1 of the encapsulation film, except that:

[0201] The silane coupling agent in this embodiment is 0.2 g of γ-methacryloyloxypropyltriisopropoxysilane (that is, 3-mercaptopropyltriethoxysilane in Embodiment 1 of the encapsulation film is replaced with the same weight of γ-methacryloyloxypropyltriisopropoxysilane), and the rest are the same as those in Embodiment 1 of the encapsulation film.

[0202] Encapsulation Film Embodiments 5 - 23:

[0203] Encapsulation Film Embodiments 5 - 23 are prepared by a method similar to that of Embodiment 1 of the encapsulation film, except that Compound 12 in Embodiment 1 of the encapsulation film is replaced with the compounds in Table 1.

[0204] Encapsulation Film Comparative Examples 1 - 3:

[0205] Encapsulation Film Comparative Examples 1 - 3 are prepared by a method similar to that of Embodiment 1 of the encapsulation film, except that Compound 12 in Embodiment 1 of the encapsulation film is replaced with Ref1, Ref2, and Ref3 as follows, respectively.

[0206]

[0207] Test Example

[0208] Performance tests are carried out on the ultraviolet light-converting encapsulation films obtained from Encapsulation Film Embodiments 1 - 23 and Encapsulation Film Comparative Examples 1 - 3:

[0209] The test standard for transmittance is carried out in accordance with GB / T29848 - 2018, and the transmittance is tested using a specific ultraviolet-visible spectrophotometer (PerkinElmer LAMBDA 950); the visible light band is tested;

[0210] The test for ultraviolet light radiation resistance performance is carried out with reference to the International Electrotechnical Commission standard IEC61345. Test conditions: the surface temperature of the specimen is 60 °C, the wavelength is 280 - 400 nm, and the radiation intensity is 15 KWh / m 2, the irradiation time is 1000 hours. Characterization method: The yellowing index (ΔYi) is tested according to GB2409-80 "Test Method for Yellow Index of Plastics".

[0211] Perform photoelectric conversion efficiency tests on photovoltaic modules including encapsulation adhesive film Examples 1-23 and encapsulation adhesive film Comparative Examples 1-3. The preparation method of the photovoltaic module is as follows: Stack the photovoltaic glass, ultraviolet light-converting encapsulation adhesive film, solar cell, ultraviolet light-converting encapsulation adhesive film, and photovoltaic backsheet neatly, and place them in a laminator for lamination at 100 °C for 20 min, with a lamination pressure of 60 KPa. Take out and cool to obtain the photovoltaic module (the two ultraviolet light-converting encapsulation adhesive films in the same photovoltaic module are of the same type).

[0212] Photoelectric conversion efficiency test: Use a solar simulator to emit a standard sunlight for testing (spectrum AM1.5G, incident power 100 mW / cm 2 , temperature 25 °C).

[0213] The test results are shown in Table 1.

[0214] The calculation method of the photoelectric conversion improvement rate in Table 1 is as follows: Take the photoelectric conversion efficiency of encapsulation adhesive film Comparative Example 1 as the comparison standard of 100%, and calculate the improvement rate by comparing the photoelectric conversion efficiency of the remaining encapsulation adhesive films with it respectively.

[0215] Photoelectric conversion improvement rate % = (photoelectric conversion efficiency of the encapsulation adhesive film in the current example - photoelectric conversion efficiency of encapsulation adhesive film Comparative Example 1) / photoelectric conversion efficiency of encapsulation adhesive film Comparative Example 1 × 100%

[0216] Table 1

[0217] Example Ultraviolet light conversion agent Visible light transmittance % Improvement rate of photoelectric conversion % UV yellowing index (ΔYi) Encapsulation adhesive film Example 1 Compound 12 93.45 0.84 0.6 Encapsulation adhesive film Example 2 Compound 12 92.99 0.72 0.6 Encapsulation adhesive film Example 3 Compound 12 93.95 1.14 0.9 Encapsulation adhesive film Example 4 Compound 12 93.44 0.82 0.6 Encapsulation adhesive film Example 5 Compound 13 92.97 0.82 0.7 Encapsulation adhesive film Example 6 Compound 21 93.37 0.93 0.6 Encapsulation adhesive film Example 7 Compound 24 93.25 0.92 0.7 Encapsulation adhesive film Example 8 Compound 30 92.37 0.61 0.9 Encapsulation adhesive film Example 9 Compound 48 92.82 0.74 0.8 Encapsulation adhesive film Example 10 Compound 55 92.75 0.71 0.8 Encapsulation adhesive film Example 11 Compound 66 93.88 0.97 0.6 Encapsulation adhesive film Example 12 Compound 71 92.64 0.69 0.8 Encapsulation adhesive film Example 13 Compound 78 92.51 0.68 0.9 Encapsulation adhesive film Example 14 Compound 84 92.27 0.60 1.0 Encapsulation adhesive film Example 15 Compound 94 93.41 0.89 0.9 Encapsulation adhesive film Example 16 Compound 113 92.90 0.75 0.8 Encapsulation adhesive film Example 17 Compound 117 93.16 0.89 0.7 Encapsulation adhesive film Example 18 Compound 120 92.25 0.58 0.9 Encapsulation adhesive film Example 19 Compound 121 93.03 0.88 0.7 Encapsulation adhesive film Example 20 Compound 126 93.60 0.96 0.6 Encapsulation adhesive film Example 21 Compound 131 92.38 0.60 0.8 Encapsulation adhesive film Example 22 Compound 141 93.89 0.96 0.6 Encapsulation adhesive film Example 23 Compound 146 94.43 1.01 0.7 Encapsulation adhesive film Comparative Example 1 Ref1 88.76 -- 3.1 Encapsulation adhesive film Comparative Example 2 Ref2 89.04 0.31 2.0 Encapsulation adhesive film Comparative Example 3 Ref3 89.21 0.39 2.2

[0218] From the above results, it can be seen that when the organic compound provided by the present invention is added to the adhesive film, especially when used as an ultraviolet light-converting encapsulation adhesive film in a solar cell module, it has the advantage of high visible light transmittance. It can absorb ultraviolet light well and convert ultraviolet light into visible light, thereby significantly improving the light conversion efficiency and weather resistance of the solar photovoltaic module.

[0219] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, including any other suitable combination of each technical feature. These simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. An organic compound containing a triazole structure, characterized in that, the organic compound has the structure shown in formula (I): wherein, in formula (I), L is a linking group connecting two benzotriazole structures, X 1 and X 2 are present or absent; L is respectively connected to any position of the two benzotriazole structures capable of leaving an H atom, or L is respectively connected to any position of the two benzotriazole structures capable of leaving an H atom through X 1 and X 2 ; L is a linking group provided by removing any two H atoms from at least one substance selected from alkanes of C 1-6 , cycloalkanes of C 3-6 , and aromatic compounds of C 6-30 with or without heteroatoms of type A; optionally, at least one substituent selected from combination A is present on L; the heteroatoms of type A are selected from at least one of N, O, and S; the combination A consists of alkyl groups of C 1-12 , alkoxy groups of C 1-12 , and phenyl groups which are unsubstituted or substituted by R 6 ; R 6 is selected from at least one of alkyl groups of C 1-12 ; Optionally existing X 1 and X 2 each independently selected from -N(R 1 )-, -C(R 2 ) 2 -, -C(O)-; R 1 and R 2 each independently selected from an alkyl group of C 1-6 ; R 1 and R 2 are the same or different and each independently selected from an alkyl group of C 1-30 which is unsubstituted or substituted by at least one group in combination B, an alkoxy group of C 1-30 which is unsubstituted or substituted by at least one group in combination B, a cycloalkyl group of C 3-12 which is unsubstituted or substituted by at least one group in combination B, an alkenyl group of C 2-20 which is unsubstituted or substituted by at least one group in combination B, and any one of phenyl groups; said combination B consists of an alkyl group of C 1-12 , an alkoxy group of C 1-12 , cyano group, -OC(O)-R 3 , -C(O)-R 3 , -N(R 4 R 5 ), a cycloalkyl group of C 3-12 , -S(O)-R 3 , phenyl group, benzyl group, thiophenyl group, furyl group, dibenzothiophenyl group, triazinyl group; R 3 , R 4 , R 5 are each independently selected from an alkyl group of C 1-6 , benzyl group, thiophenyl group, and furyl group.

2. The organic compound according to claim 1, characterized in that, in formula (I), L is a linking group connecting two benzotriazole structures, X 1 and X 2 are present or absent; L is respectively connected to any position of the two benzotriazole structures capable of leaving an H atom, or L is respectively connected to any position of the two benzotriazole structures capable of leaving an H atom through X 1 and X 2 ; L is a linking group provided by removing any two H atoms from at least one substance selected from alkanes of C 1-6 , cycloalkanes of C 3-6 , benzene, biphenyl, naphthalene, anthracene, phenanthrene, terphenyl, dibenzofuran, pyridine, pyrimidine, triazine, benzothiazole, 9,9-dimethylfluorene, 9,9-diphenylfluorene, dibenzothiophene, pyrene, perylene, spirobifluorene; optionally, at least one substituent selected from the group A is present on L; the group A consists of alkyl groups of C 1-10 , alkoxy groups of C 1-10 , and phenyl groups which are unsubstituted or substituted by R 6 ; R 6 is selected from at least one of alkyl groups of C 1-12 ; Optionally existing X 1 and X 2 are each independently selected from -N(R 1 )-, -C(R 2 ) 2 -, -C(O)-; R 1 and R 2 are each independently selected from one of the alkyl groups of C 1-6 ; R 1 and R 2 are the same or different and each independently selected from an alkyl group of C 1-24 which is unsubstituted or substituted by at least one group in combination B, an alkoxy group of C 1-24 which is unsubstituted or substituted by at least one group in combination B, a cycloalkyl group of C 3-10 which is unsubstituted or substituted by at least one group in combination B, an alkenyl group of C 2-16 which is unsubstituted or substituted by at least one group in combination B, and any one of phenyl groups; said combination B consists of an alkyl group of C 1-12 , an alkoxy group of C 1-12 , cyano, -OC(O)-R 3 , -C(O)-R 3 , -N(R 4 R 5 ), a cycloalkyl group of C 3-12 , -S(O)-R 3 , phenyl, benzyl, thienyl, furyl, dibenzothienyl, triazinyl; R 3 , R 4 , R 5 are each independently selected from an alkyl group of C 1-6 , benzyl, thienyl, and furyl.

3. The organic compound according to claim 1 or 2, characterized in that, in formula (I), L is a linking group connecting two benzotriazole structures, X 1 and X 2 do not exist; L is respectively connected to any position of the two benzotriazole structures capable of leaving an H atom; L is a linking group provided by removing any two H atoms from at least one substance selected from alkanes of C 1-6 , cycloalkanes of C 3-6 , benzene, biphenyl, naphthalene, anthracene, phenanthrene, terphenyl, dibenzofuran, pyridine, pyrimidine, triazine, benzothiazole, 9,9-dimethylfluorene, 9,9-diphenylfluorene, dibenzothiophene, pyrene, perylene, spirobifluorene; at least one substituent selected from the group A is optionally present on L; the group A consists of alkyl groups of C 1-10 , alkoxy groups of C 1-10 , phenyl groups which are unsubstituted or substituted by R 6 ; R 6 is selected from at least one of alkyl groups of C 1-12 ; R 1 and R 2 are the same or different and each independently selected from C 1-24 alkyl which is unsubstituted or substituted by at least one group in combination B, C 1-24 alkoxy which is unsubstituted or substituted by at least one group in combination B, C 3-10 cycloalkyl which is unsubstituted or substituted by at least one group in combination B, C 2-16 alkenyl which is unsubstituted or substituted by at least one group in combination B, and any one of phenyl which is unsubstituted or substituted by at least one group in combination B; said combination B consists of C 1-12 alkyl, C 1-12 alkoxy, cyano, -OC(O)-R 3 , -C(O)-R 3 , -N(R 4 R 5 ), C 3-12 cycloalkyl, -S(O)-R 3 , phenyl, benzyl, thienyl, furyl, dibenzothienyl, triazinyl; R 3 , R 4 , R 5 are each independently selected from one of C 1-6 alkyl, benzyl, thienyl, furyl; Preferably, the organic compound shown in formula (I) is selected from any one of the following:

4. The organic compound according to claim 1 or 2, characterized in that, in formula (I), L is a linking group connecting two benzotriazole structures, X 1 and X 2 do not exist; L is connected to any position of the two benzotriazole structures that can leave an H atom respectively; L is a linking group provided by removing any two H atoms from at least one substance selected from alkanes of C 1-6 , cycloalkanes of C 3-6 , benzene, biphenyl, naphthalene, anthracene, phenanthrene, terphenyl, dibenzofuran, pyridine, pyrimidine, triazine, benzothiazole, 9,9-dimethylfluorene, 9,9-diphenylfluorene, dibenzothiophene, pyrene, perylene, spirobifluorene; at least one substituent selected from the group A is optionally present on L; the group A consists of alkyl groups of C 1-10 , alkoxy groups of C 1-10 , and phenyl groups which are unsubstituted or substituted by R 6 ; R 6 is selected from at least one of alkyl groups of C 1-12 ; R 1 is the same as R 2 and is selected from an alkyl group of C 1-24 which is unsubstituted or substituted by at least one group in combination B, an alkoxy group of C 1-24 which is unsubstituted or substituted by at least one group in combination B, a cycloalkyl group of C 3-10 which is unsubstituted or substituted by at least one group in combination B, an alkenyl group of C 2-16 which is unsubstituted or substituted by at least one group in combination B, and any one of phenyl groups; the combination B consists of an alkyl group of C 1-12 , an alkoxy group of C 1-12 , cyano, -OC(O)-R 3 , -C(O)-R 3 , -N(R 4 R 5 ), a cycloalkyl group of C 3-12 , -S(O)-R 3 , phenyl, benzyl, thienyl, furyl, dibenzothienyl, triazinyl; R 3 , R 4 , R 5 are each independently selected from an alkyl group of C 1-6 , benzyl, thienyl, and furyl; Preferably, the organic compound shown in formula (I) is selected from any one of the following:

5. The organic compound according to claim 1 or 2, characterized in that, in formula (I), L is a linking group connecting two benzotriazole structures, X 1 and X 2 do not exist; L is respectively connected to any position of the two benzotriazole structures that can leave an H atom; L is a linking group provided by removing any two H atoms from at least one substance selected from benzene, biphenyl, naphthalene, anthracene, phenanthrene, terphenyl, pyrene, perylene; optionally, at least one substituent selected from the group A is present on L; the group A consists of an alkyl group having C 1-10 , an alkoxy group having C 1-10 , and a phenyl group which is unsubstituted or substituted by R 6 ; R 6 is selected from at least one of alkyl groups having C 1-12 ; R 1 and R 2 are the same and are selected from an alkyl group of C 1-24 which is unsubstituted or substituted by at least one group in combination B, an alkoxy group of C 1-24 which is unsubstituted or substituted by at least one group in combination B, a cycloalkyl group of C 3-10 which is unsubstituted or substituted by at least one group in combination B, an alkenyl group of C 2-16 which is unsubstituted or substituted by at least one group in combination B, and any one of phenyl groups; the combination B consists of an alkyl group of C 1-12 , an alkoxy group of C 1-12 , cyano group, -OC(O)-R 3 , -C(O)-R 3 , -N(R 4 R 5 ), a cycloalkyl group of C 3-12 , -S(O)-R 3 , phenyl group, benzyl group, thienyl group, furyl group, dibenzothienyl group, and triazinyl group; R 3 , R 4 , R 5 are each independently selected from an alkyl group of C 1-6 , benzyl group, thienyl group, and furyl group; Preferably, the organic compound shown in formula (I) is selected from any one of the following:

6. The organic compound according to claim 1 or 2, characterized in that, the organic compound shown in formula (I) is selected from any one of the following:

7. Use of the organic compound containing a triazole structure according to any one of claims 1-6 in a glue film; Preferably, the glue film is an encapsulation glue film; Preferably, the glue film is a light conversion encapsulation glue film; Preferably, the glue film is an ultraviolet light conversion encapsulation glue film.

8. A composition for an ultraviolet light conversion encapsulation glue film, characterized in that, the composition contains a light conversion agent, and the light conversion agent contains the organic compound containing a triazole structure according to any one of claims 1-6; Preferably, the composition further contains a matrix material and at least one auxiliary agent selected from a photoinitiator, a light stabilizer, a crosslinking agent, a co-crosslinking agent, an antioxidant and a silane coupling agent; relative to 100 parts by weight of the matrix material, the content of the light conversion agent is 0.005-2 parts, the content of the photoinitiator is 0-2 parts by weight, the content of the light stabilizer is 0.1-1 part, the content of the crosslinking agent is 0-3 parts, the content of the co-crosslinking agent is 0-2 parts, the content of the antioxidant is 0.05-1 part, and the content of the silane coupling agent is 0.2-1 part; More preferably, relative to 100 parts by weight of the matrix material, the content of the light conversion agent is 0.01-1 part, the content of the photoinitiator is 0.1-2 parts by weight, the content of the light stabilizer is 0.1-1 part, the content of the crosslinking agent is 0.1-3 parts, the content of the co-crosslinking agent is 0.1-2 parts, the content of the antioxidant is 0.05-1 part, and the content of the silane coupling agent is 0.2-1 part; Preferably, the matrix material is an ethylene copolymer; Preferably, the matrix material is selected from at least one of ethylene-vinyl acetate copolymer, ethylene-butene copolymer, ethylene-octene copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-vinyl acetate-based multi-copolymer, ethylene-methyl acrylate-based multi-copolymer, ethylene-ethyl acrylate-based multi-copolymer, ethylene-methyl methacrylate-based multi-copolymer, ethylene-ethyl methacrylate-based multi-copolymer, and ethylene-α-olefin copolymer; Preferably, the matrix material is ethylene-vinyl acetate copolymer; Preferably, the matrix material is ethylene-vinyl acetate copolymer, and the content of vinyl acetate structural units in the ethylene-vinyl acetate copolymer is 25-35 wt%, the melt index of the ethylene-vinyl acetate copolymer is 0.1-40 g / min, the melting point is 40-90 °C, and the light transmittance is ≥90%.

9. A method for preparing an ultraviolet light-converting encapsulation film Characterized in that This method is carried out using the components in the composition for ultraviolet light-converting encapsulation film described in claim 8, including: Mixing and molding the material I containing the components in the composition in sequence to obtain the ultraviolet light-converting encapsulation film; Preferably, the conditions for mixing include: the mixing temperature is 70 °C - 120 °C; the mixing time is 10 min - 40 min; the stirring speed is 100 rpm - 300 rpm.

10. An ultraviolet light-converting encapsulation film obtained by the method for preparing an ultraviolet light-converting encapsulation film described in claim 9; Preferably, the thickness of the ultraviolet light-converting encapsulation film is 0.3 mm - 0.8 mm.

11. The application of the ultraviolet light-converting encapsulation film described in claim 10 in a photovoltaic device.

12. A photovoltaic module Characterized in that This photovoltaic module contains a photovoltaic glass, an encapsulation film layer I, a battery cell, an encapsulation film layer II, and a photovoltaic backsheet stacked in sequence, The materials forming the encapsulation film layer I and the encapsulation film layer II are each independently selected from at least one of the ultraviolet light-converting encapsulation films described in claim 10.

13. A method for preparing the photovoltaic module described in claim 12 Characterized in that This method includes: (1) Stacking a photovoltaic glass, an encapsulation film I, a battery cell, an encapsulation film II, and a photovoltaic backsheet in sequence to obtain an intermediate I; (2) Performing a hot pressing treatment on the intermediate I to obtain the photovoltaic module; The encapsulation film I and the encapsulation film II are each independently selected from at least one of the ultraviolet light-converting encapsulation films described in claim 10; Preferably, in step (2), the conditions for the hot pressing treatment include: the heating temperature is 80 - 170 °C, the pressing pressure is 40 KPa - 70 KPa, and the pressing time is 15 - 30 min.

Images