An organic compound, use thereof, a composition for a sealing adhesive, and a method for producing a sealing adhesive

Abstract

This invention relates to the field of solar cells, and discloses an organic compound and its applications, a composition for encapsulating adhesives, and a method for preparing encapsulating adhesives. The organic compound has the structure shown in formula (I). The organic compound provided by this invention has strong absorption of ultraviolet light, which is then converted into visible light and radiated. Furthermore, the ultraviolet light conversion encapsulating film containing the organic compound of this invention has high transmittance, which can increase the transmittance of visible light and thus improve the photoelectric conversion efficiency of photovoltaic modules.

Description

Technical Field

[0001] This invention relates to the field of solar cells, and more specifically to an organic compound and its application, a composition for encapsulating adhesives, and a method for preparing encapsulating adhesives. Background Technology

[0002] With the deterioration of the environment, ultraviolet radiation is increasingly affecting humans.

[0003] In the field of solar cells, some cells age severely after being exposed to ultraviolet radiation, especially heterojunction modules. Their ultra-high photoelectric conversion efficiency is largely due to the excellent surface passivation ability of intrinsic amorphous silicon over crystalline silicon. However, the drawback is that because the TCO film and amorphous silicon film absorb ultraviolet light, the current of their cells is lower than that of ordinary cells, resulting in a decrease in module power.

[0004] Therefore, heterojunction modules have very high requirements for UV resistance. Although UV cut-off layers and UV absorbers can block UV radiation from reaching the module, they also reduce the module's light conversion efficiency. Therefore, in the photovoltaic field, it is necessary not only to prevent UV radiation aging of solar cell modules, but also to have a film layer with high light transmittance in the visible light region, while simultaneously improving the photoelectric conversion efficiency of the module.

[0005] Light transfer agent is a product that can absorb negative gain light and convert it into positive gain light. It is added to the film as an additive or auxiliary agent to form a light transfer film.

[0006] Light transfer agents can not only absorb ultraviolet light, but also convert the absorbed ultraviolet light into visible light.

[0007] The functional principle of photoconverters is that after the material absorbs energy of a certain wavelength, the 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 jump from the unstable high-energy state back to the stable ground state. At the same time, during the return process, the energy is released in the form of light, thereby realizing photoconversion.

[0008] However, existing encapsulation materials have low visible light transmittance, poor absorption of ultraviolet light, and low efficiency in converting ultraviolet light into visible light, thus limiting their ability to improve the conversion efficiency and weather resistance of solar cells.

[0009] Therefore, it is particularly urgent to develop ultraviolet light converters with high transmittance, the ability to absorb ultraviolet light and convert it into visible light with high efficiency, and high weather resistance. Summary of the Invention

[0010] The purpose of this invention is to overcome the shortcomings of existing technologies, such as low visible light transmittance, poor absorption of ultraviolet light by light conversion materials, and low efficiency in converting ultraviolet light into visible light.

[0011] To achieve the above objectives, a first aspect of the present invention provides an organic compound having the structure shown in formula (I).

[0012]

[0013] In equation (I),

[0014] n and m are each independently 0, 1, 2, 3, 4 or 5;

[0015] R 14 H or -(CR) 11 R 12 )mC(CH2)-R 13 ;

[0016] R 11 and R 12 Each is independently an H, C1-C6 alkyl group; or, R 11 and R 12 Together they form a tubeene structure;

[0017] R 13 C1-C6 alkoxy groups that are unsubstituted or substituted with C1-C6 alkoxy groups 12 Alkyl, C1-C 12 alkoxy groups;

[0018] R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 12 Alkyl groups, unsubstituted or substituted by at least one group in combination A, C1-C 12 The combination A comprises any one of the following: an alkoxy group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a C3-C6 cycloalkyl group; wherein the combination A consists of a C1-C6 alkoxy group, a C3-C6 cycloalkyl group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is selected from at least one of N, O, and S.

[0019] A second aspect of the invention provides the use of an organic compound described in the first aspect in an encapsulating adhesive.

[0020] A third aspect of the present invention provides a composition for encapsulating adhesive, the composition comprising 100 parts by weight of a matrix material, 0.005-2 parts by weight of an ultraviolet light converter, 0-2 parts by weight of a photoinitiator, 0.1-1 parts by weight of a light stabilizer, 0-3 parts by weight of a crosslinking agent, 0-2 parts by weight of a co-crosslinking agent, 0.05-1 parts by weight of an antioxidant, and 0.2-1 parts by weight of a silane coupling agent; wherein the ultraviolet light converter is selected from at least one of the organic compounds described in the first aspect.

[0021] A fourth aspect of the present invention provides a method for preparing an encapsulating adhesive, the method comprising: curing a material I containing each component of a composition to obtain the encapsulating adhesive; wherein the composition is the encapsulating adhesive composition described in the third aspect.

[0022] The present invention has at least the following specific advantages:

[0023] The organic compound provided by this invention has strong absorption of ultraviolet light, which is then converted into visible light and emitted. Furthermore, the ultraviolet light conversion encapsulation film containing the organic compound of this invention has high transmittance, which can increase the transmittance of visible light and thus improve the photoelectric conversion efficiency of photovoltaic modules. Detailed Implementation

[0024] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0025] In this invention, unless otherwise specified, groups of the same type have similar interpretations, and will not be described in detail here.

[0026] C1-C 12 The alkyl group refers to a straight-chain alkyl or branched alkyl group with a total number of carbon atoms of 1-12 (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12). For example, it can be methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, etc.

[0027] C 3-6 The cycloalkyl group indicates that the number of cyclic carbon atoms on the cycloalkyl group is 3, 4, 5 or 6.

[0028] The terminus ene structure represents a terminal ethylene structure.

[0029] When the organic compounds of the present invention contain substituents, unless otherwise specified, there are no particular requirements for the specific substitution position of the substituents, and they can be any position that can be substituted.

[0030] As previously stated, a first aspect of the present invention provides an organic compound having the structure shown in formula (I):

[0031]

[0032] In equation (I),

[0033] n and m are each independently 0, 1, 2, 3, 4 or 5;

[0034] R 14 H or -(CR) 11 R 12 )mC(CH2)-R 13 ;

[0035] R 11 and R 12 Each is independently an H, C1-C6 alkyl group; or, R 11 and R 12 Together they form a tubeene structure;

[0036] R 13 C1-C6 alkoxy groups that are unsubstituted or substituted with C1-C6 alkoxy groups 12 Alkyl, C1-C 12 alkoxy groups;

[0037] R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 12 Alkyl groups, unsubstituted or substituted by at least one group in combination A, C1-C 12 The combination A comprises any one of the following: an alkoxy group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a C3-C6 cycloalkyl group; wherein the combination A consists of a C1-C6 alkoxy group, a C3-C6 cycloalkyl group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is selected from at least one of N, O, and S.

[0038] In the preferred case, in equation (I),

[0039] n and m are each independently 0, 1, 2, 3, 4 or 5;

[0040] R 14 H or -(CR) 11 R 12 )mC(CH2)-R 13 ;

[0041] R 11 and R 12 Each is independently an H, C1-C4 alkyl group; or, R 11 and R 12 Together they form a tubeene structure;

[0042] R 13 C1-C4 alkoxy groups that are unsubstituted or substituted with C1-C4 alkoxy groups 10 Alkyl groups, C1-C8 alkoxy groups;

[0043] R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 10 The combination comprises any one of the following: alkyl group, unsubstituted or substituted C1-C8 alkoxy group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and C3-C6 cycloalkyl group; wherein the combination A consists of C1-C6 alkoxy group, C3-C6 cycloalkyl group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is O and / or S.

[0044] According to a preferred embodiment, the organic compound represented by formula (I) is selected from any one of the following:

[0045]

[0046]

[0047]

[0048]

[0049] In the preferred embodiment 1, in formula (I),

[0050] n is 1, m is 0;

[0051] R 14 For H or -C(CH2)-R 13 ;

[0052] R 13 C1-C4 alkoxy groups that are unsubstituted or substituted with C1-C4 alkoxy groups 10 Alkyl groups, C1-C8 alkoxy groups;

[0053] R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 10 The combination comprises any one of the following: alkyl group, unsubstituted or substituted C1-C8 alkoxy group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and C3-C6 cycloalkyl group; wherein the combination A consists of C1-C6 alkoxy group, C3-C6 cycloalkyl group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is O and / or S.

[0054] In the preferred embodiment 1, more preferably, in formula (I),

[0055] n is 1, m is 0;

[0056] R 14 For H;

[0057] R 13 C1-C4 alkoxy groups that are unsubstituted or substituted with C1-C4 alkoxy groups 10 Alkyl groups, C1-C8 alkoxy groups;

[0058] R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 10 The combination comprises any one of the following: alkyl group, unsubstituted or substituted C1-C8 alkoxy group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and C3-C6 cycloalkyl group; wherein the combination A consists of C1-C6 alkoxy group, C3-C6 cycloalkyl group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is O and / or S.

[0059] In the preferred embodiment 1, particularly preferably, the organic compound represented by formula (I) is selected from any one of the following:

[0060]

[0061] In the preferred embodiment 2, in formula (I),

[0062] n is 1, m is 0;

[0063] R 14 -C(CH2)-R 13 ;

[0064] R 13 C1-C4 alkoxy groups that are unsubstituted or substituted with C1-C4 alkoxy groups 10 Alkyl groups, C1-C8 alkoxy groups;

[0065] R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 10 The combination comprises any one of the following: alkyl group, unsubstituted or substituted C1-C8 alkoxy group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and C3-C6 cycloalkyl group; wherein the combination A consists of C1-C6 alkoxy group, C3-C6 cycloalkyl group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is O and / or S.

[0066] In the preferred embodiment 2, more preferably, the organic compound represented by formula (I) is selected from any one of the following:

[0067]

[0068] In the preferred embodiment 3, in formula (I),

[0069] n is 1, and m is 2, 3, 4 or 5;

[0070] R 13 C1-C4 alkoxy groups that are unsubstituted or substituted with C1-C4 alkoxy groups 10 Alkyl groups, C1-C8 alkoxy groups;

[0071] R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 10 The combination comprises any one of the following: alkyl group, unsubstituted or substituted C1-C8 alkoxy group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and C3-C6 cycloalkyl group; wherein the combination A consists of C1-C6 alkoxy group, C3-C6 cycloalkyl group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is O and / or S.

[0072] In the preferred embodiment 3, more preferably, the organic compound represented by formula (I) is selected from any one of the following:

[0073]

[0074] In the preferred embodiment 4, n is 1 and m is 1 in formula (I);

[0075] R 14 For H;

[0076] R 11 and R 12 Each is independently an H, C1-C4 alkyl group; or, R 11 and R 12 Together they form a tubeene structure;

[0077] R 13 C1-C4 alkoxy groups that are unsubstituted or substituted with C1-C4 alkoxy groups 10 Alkyl groups, C1-C8 alkoxy groups;

[0078] R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 10 The combination comprises any one of the following: alkyl group, unsubstituted or substituted C1-C8 alkoxy group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and C3-C6 cycloalkyl group; wherein the combination A consists of C1-C6 alkoxy group, C3-C6 cycloalkyl group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is O and / or S.

[0079] In the preferred embodiment 4, more preferably, the organic compound represented by formula (I) is selected from any one of the following:

[0080]

[0081] In the preferred embodiment 5, in formula (I),

[0082] n is 0, m is 0;

[0083] R 13 C1-C4 alkoxy groups that are unsubstituted or substituted with C1-C4 alkoxy groups 10 Alkyl groups, C1-C8 alkoxy groups;

[0084] R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 10 The combination comprises any one of the following: alkyl group, unsubstituted or substituted C1-C8 alkoxy group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and C3-C6 cycloalkyl group; wherein the combination A consists of C1-C6 alkoxy group, C3-C6 cycloalkyl group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is O and / or S.

[0085] In the preferred embodiment 5, more preferably, the organic compound represented by formula (I) is selected from any one of the following:

[0086]

[0087] As previously stated, the second aspect of the present invention provides the use of an organic compound described in the first aspect in an encapsulating adhesive.

[0088] Preferably, the encapsulating adhesive is a light conversion encapsulating adhesive; more preferably, the encapsulating adhesive is an ultraviolet light conversion encapsulating adhesive.

[0089] As previously described, a third aspect of the present invention provides a composition for encapsulating adhesives, the composition comprising 100 parts by weight of a matrix material, 0.005-2 parts by weight of an ultraviolet light converter, 0-2 parts by weight of a photoinitiator, 0.1-1 parts by weight of a light stabilizer, 0-3 parts by weight of a crosslinking agent, 0-2 parts by weight of a co-crosslinking agent, 0.05-1 parts by weight of an antioxidant, and 0.2-1 parts by weight of a silane coupling agent; wherein the ultraviolet light converter is selected from at least one of the organic compounds described in the first aspect.

[0090] More preferably, the composition contains 100 parts by weight of a matrix material, 0.01-1 parts by weight of an ultraviolet light converter, 0.1-2 parts by weight of a photoinitiator, 0.1-1 parts by weight of a light stabilizer, 0.1-3 parts by weight of a crosslinking agent, 0.1-2 parts by weight of a co-crosslinking agent, 0.05-1 parts by weight of an antioxidant, and 0.2-1 parts by weight of a silane coupling agent.

[0091] Preferably, the matrix material is an ethylene copolymer.

[0092] More preferably, the ethylene copolymer is any one or a mixture of at least two of the following: ethylene-vinyl acetate copolymer, ethylene-butene copolymer, ethylene-octene copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-vinyl acetate-based multi-component copolymer, ethylene-methyl acrylate-based multi-component copolymer, ethylene-ethyl acrylate-based multi-component copolymer, ethylene-methyl methacrylate-based multi-component copolymer, ethylene-ethyl methacrylate-based multi-component copolymer, and ethylene-α-olefin copolymer.

[0093] Particularly preferred is that the matrix material is an ethylene-vinyl acetate copolymer.

[0094] More preferably, the vinyl acetate structural unit content in the ethylene-vinyl acetate copolymer used as the matrix material 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℃ (under the test conditions of 190℃ / 2.16 kg), and the light transmittance is ≥90%.

[0095] Preferably, the photoinitiator is selected from: 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexylphenyl ketone, benzophenone, (2,4,6-trimethylbenzoyl)diphenylphosphine oxide, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butanone, 2-hydroxy-2-methyl-1-phenylpropanone (2-hydroxy-1-(4-(2-hydroxy-2-methylpropionylphenyl)benzyl)-2-methyl-1-propanone, titanoceramsite photoinitiators, thiopyridinone / iodonium salt systems, organic peroxide systems, borate / dye systems, hexaaryl diimidazole / dye systems, coumarin ketone / dye systems, benzoyl ketal photoinitiators, acetophenone photoinitiators, anthraquinone photoinitiators and their derivatives, benzoate photoinitiators, bicyclic diketone compounds, camphorquinone, any one or a mixture of at least two of the following.

[0096] Preferably, the light stabilizer is selected from one or a mixture of at least two of the following: bis(2,2,6,6-tetramethyl-4-piperidinol) sebacate, bis-2,2,6,6-tetramethylpiperidinol sebacate, 2-(2'-hydroxy-5'-methylphenyl)-benzotriazole, [[3,5-di-tert-butyl-4-hydroxyphenyl]methyl]butylmalonate di(1,2,2,6,6-pentamethyl-4-piperidinol), bis(2,2,6,6-tetramethyl-4-piperidinol) sebacate, and 2,4-dichloro-6-(4-morpholino)-1,3,5-triazine.

[0097] Preferably, the crosslinking agent is selected from: tert-butyl peroxide, tert-butyl peroxide-isopropyl carbonate, cyclohexanone peroxide, tert-butyl hydrogen peroxide, dicumyl peroxide, di(tert-butyl peroxide-isopropyl)benzene, benzoyl peroxide, di(2,4-dichlorobenzoyl peroxide), tert-butyl peroxybenzoate, tert-butyl peroxycarbonate-2-ethylhexyl peroxide, tert-butyl peracetate, tert-butyl peroxide-3,5,5-trimethylhexanoate, di(4-tert-butylcyclohexanone) peroxybicarbonate, tert-amyl peroxide, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 1,1-di-tert-butyl peroxycyclohexane, and 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, or a mixture of at least two of the following.

[0098] Preferably, the crosslinking agent is selected from one or a mixture of at least two of the following: triallyl isocyanurate, ethylene glycol dimethacrylate, N,N′-m-phenylbismaleimide, trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, propanetriol triacrylate, and ethoxylated pentaerythritol tetraacrylate.

[0099] Preferably, the antioxidant is selected from one or a mixture of at least two of the following: 2,6-di-tert-butyl-p-cresol, di(2,4-dicumylphenyl)pentaerythritol diphosphite, distearate pentaerythritol diphosphite, β-(3,5-di-tert-butyl-4-hydroxybenzyl)propionate, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanuric acid, β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate n-octadecyl alcohol, tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate)pentaerythritol ester, 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.

[0100] Preferably, the silane coupling agent is selected from one or a mixture of at least two of the following: vinyltriethoxysilane, vinyltrimethoxysilane, vinyltri(2-methoxyethoxy)silane, 3-triethoxysilyl-1-propylamine, (triethoxysilyl)ethylene, γ-glycidoxypropyltrimethoxysilane, vinyltrichlorosilane, γ-methacryloyloxypropyltrimethoxysilane, γ-methacryloyloxypropyltriisopropoxysilane, 3-thiopropyltrimethoxysilane, and 3-thiopropyltriethoxysilane.

[0101] As previously stated, a fourth aspect of the present invention provides a method for preparing an encapsulating adhesive, the method comprising: curing a material I containing each component of a composition to obtain the encapsulating adhesive; wherein the composition is the encapsulating adhesive composition described in the third aspect.

[0102] In a more preferred embodiment, the curing process includes: sequentially mixing and casting the material I.

[0103] According to a particularly preferred embodiment, the method for preparing the encapsulating adhesive 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 sequentially performing kneading and casting to obtain an encapsulating adhesive film.

[0104] Preferably, the mixing conditions include: a mixing temperature of 70℃-120℃; a mixing time of 10min-40min; and a stirring speed of 100rpm-300rpm.

[0105] Preferably, the thickness of the encapsulating film obtained after casting is 0.3 mm to 0.8 mm. More preferably, the thickness of the ultraviolet light conversion encapsulating film is 0.5 mm.

[0106] Optionally, the casting process is carried out in a casting machine, through plasticizing extrusion, stretching, traction, and winding, to obtain the encapsulating adhesive (film).

[0107] In a preferred embodiment, the present invention also provides a photovoltaic module comprising photovoltaic glass, an encapsulating film layer I, a solar cell, an encapsulating film layer II, and a photovoltaic backsheet, which are sequentially stacked; 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 conversion encapsulating films described above in the present invention.

[0108] Preferably, the present invention also provides a method for preparing the photovoltaic module, comprising:

[0109] (1) Photovoltaic glass, encapsulating film I, solar cell, encapsulating film II and photovoltaic backsheet are stacked in sequence to obtain intermediate body I;

[0110] (2) The intermediate I is subjected to hot pressing to obtain the photovoltaic module;

[0111] The encapsulating film I and the encapsulating film II are each independently selected from at least one of the ultraviolet light conversion encapsulating films described above in this invention.

[0112] More preferably, in the method for preparing the photovoltaic module, the method includes: sequentially stacking photovoltaic glass, the ultraviolet light conversion encapsulation film, solar cells, the ultraviolet light conversion encapsulation film, and a photovoltaic backsheet, and then heating and pressing them to obtain the photovoltaic module.

[0113] Preferably, in step (2), the conditions for the hot pressing treatment include: heating temperature of 80-170℃, pressing pressure of 40KPa-70KPa, and pressing time of 15-30min.

[0114] The present invention will be described in detail below through examples.

[0115] For the following examples where specific experimental steps or conditions are not specified, the procedures or conditions described in the literature of this field can be followed. Reagents or instruments whose manufacturers are not specified are all commercially available standard products.

[0116] Unless otherwise specified, room temperature and ambient temperature as used below refer to 25±1℃.

[0117] The ethylene-vinyl acetate copolymer used in this invention has a vinyl acetate structural unit content of 28 wt%, a melt index of 20 g / 10 min (under test conditions of 190 °C / 2.16 kg), and a melting point of 75 °C.

[0118] DBU is 1,8-diazabicycloundec-7-ene.

[0119] Preparation Example 1

[0120]

[0121] Synthesis of Intermediate 1-1: In a 500 mL three-necked flask, 0.05 mol of 4,7-dibromo-2H-benzo[d][1,2,3]triazole, 0.05 mol of methylboronic acid, 0.125 mol of sodium tert-butoxide, 0.5 mmol of tris(dibenzylacetone)dipalladium, 0.5 mmol of tritert-butylphosphine, and 140 mL of toluene solvent were added sequentially. The mixture was stirred under nitrogen purging and heated to reflux for 8 h. HPLC analysis confirmed the reaction was complete. The reaction solution was cooled to room temperature, and 250 mL of deionized water was added. The mixture was stirred for 10 min. The organic phase was washed three times with water, and the organic phases were combined and dried over anhydrous magnesium sulfate. The drying agent was filtered off, and the organic solvent was evaporated. The residue was separated by silica gel column chromatography to obtain Intermediate 1-1 (yield: 81.4%).

[0122] Synthesis of Compound 1: In a 500 mL three-necked flask under nitrogen protection, intermediate 1-1 (0.03 mol), 4-tolueneboronic acid (0.06 mol), and a mixed solution of toluene, ethanol, and water (toluene, ethanol, and water in a volume ratio of 3:2:1) (100 mL) were added sequentially, and stirring was initiated. Then, potassium carbonate (0.15 mol) and tetrakis(triphenylphosphine)palladium (0.6 mmol) were added sequentially, and the mixture was heated to reflux for 6 h. HPLC analysis indicated that the reaction was essentially complete. Deionized water (150 mL) was added to the reaction solution, and the mixture was stirred for 10 min. The organic phase was washed three times with water, and the two phases were combined and dried over anhydrous magnesium sulfate. The drying agent was filtered off, the organic solvent was evaporated, and the residue was separated by silica gel column chromatography to obtain Compound 1 (yield: 65.7%).

[0123] Mass spectrometry: C24H23N3, theoretical value: 353.19, measured value: 353.20. 1H-NMR (400MHz, CDCl3) (ppm) δ=1.64~1.68 (3H, s), 2.32~2.36 (6H, s), 4.72~4.74 (1H, m), 4.90~4.94 (3H, m), 7.14~7.18 (4H, d), 7.47~7.51 (4H, d), 7.93~7.96 (2H, s).

[0124] Preparation Example 2

[0125]

[0126] Synthesis of intermediate 3-1: In a 500 mL three-necked flask, 0.05 mol of 2-methylenepentanal and 60 mL of ethanol were added sequentially. Under nitrogen protection, stirring was started, and the mixture was cooled to 0 °C. NaBH4 (0.03 mol) was added in portions, and the mixture was kept at 0 °C for 30 min. Then, the mixture was raised to room temperature and kept at 1 h. Acetone (5 mL) was added dropwise. HPLC analysis showed that the reaction of the starting material was basically complete, and the ethanol was evaporated to dryness. Deionized water (50 mL) was added, and the mixture was stirred for 10 min. Diethyl ether was added, and the mixture was extracted three times. The organic phases were combined and dried over anhydrous magnesium sulfate. The drying agent was filtered off, and the organic solvent was evaporated to dryness. The residue was separated by silica gel column chromatography to obtain intermediate 3-1 (yield: 94.7%).

[0127] Synthesis of intermediate 3-2: In a 500 mL three-necked flask, intermediate 3-1 (47 mmol) and anhydrous tetrahydrofuran (80 mL) were added sequentially. Under nitrogen protection, stirring was started, followed by the addition of triphenylphosphine (56 mmol) and stirring for 10 min. I2 (56 mmol) was added, and the solution turned deep red. This was maintained for 30 min, and HPLC analysis showed that the reaction of the starting material was basically complete. Saturated Na2S2O3 (50 mL) was added, followed by diethyl ether. The mixture was extracted three times, and the organic phases were combined, washed with saturated sodium bicarbonate, and dried over anhydrous sodium sulfate. The drying agent was filtered off, the organic solvent was evaporated, and the residue was separated by silica gel column chromatography to obtain intermediate 3-2 (yield: 90.5%).

[0128] Synthesis of intermediate 3-3: The synthesis method is the same as that of intermediate 1-1, yielding intermediate 3-3 (yield: 84.1%).

[0129] Synthesis of compound 3: The synthesis method was the same as that of compound 1, yielding compound 3 (yield: 63.5%).

[0130] Mass spectrometry: C26H27N3, theoretical value: 381.22, measured value: 381.20. 1H-NMR (400MHz, CDCl3) (ppm) δ=0.90~0.97 (3H, m), 1.34~1.48 (2H, m), 2.14~2.22 (2H, m), 2.32~2.36 (6H, s), 4.71~4.75 (1H, m), 4.90~4.96 (3H, m), 7.13~7.19 (4H, m), 7.46~7.52 (4H, m), 7.93~7.96 (2H, s).

[0131] Preparation Example 3

[0132]

[0133] Synthesis of compound 7: The synthesis method was the same as that of compound 1, yielding compound 7 (yield: 62.7%).

[0134] Mass spectrometry: C30H35N3, theoretical value: 437.28, measured value: 437.30. 1H-NMR (400MHz, CDCl3) (ppm) δ=1.32~1.34 (18H, s), 1.65~1.67 (3H, m), 4.71~4.74 (1H, m), 4.90~4.94 (3H, m), 7.35~7.40 (4H, m), 7.44~7.49 (4H, m), 7.94~7.95 (2H, s).

[0135] Preparation Example 4

[0136]

[0137] Synthesis of intermediate 16-1: In a 500 mL three-necked flask, epichlorohydrin (50 mmol) and methanol (100 mL) were added sequentially. The mixture was cooled to 0 °C, and sodium methoxide (55 mmol) was added. The mixture was stirred for 10 min, and dichloromethane (50 mmol) was added dropwise over 30 min. The mixture was kept at 0 °C for 1 h, then heated to room temperature and kept at 0 °C for 2 h. HPLC analysis showed that the reaction was essentially complete. The solvent was evaporated to dryness. The mixture was diluted with ethyl acetate, filtered, and the organic solvent was evaporated to dryness. The residue was separated by silica gel column chromatography to obtain intermediate 16-1 (yield: 98.2%).

[0138] Synthesis of intermediate 16-2: In a 500 mL three-necked flask, intermediate 16-1 (49 mmol), acetone (120 mL), and sodium iodide (54 mmol) were added sequentially. The mixture was stirred under nitrogen purging and heated to reflux for 4 h. HPLC analysis confirmed the reaction was complete. The reaction solution was cooled to room temperature, filtered, and the organic solvent was evaporated to dryness. The solution was diluted with ethyl acetate, filtered again, and saturated Na₂S₂O₃ (20 mL) was added. The solution was dried over anhydrous sodium sulfate. The drying agent was filtered off, the organic solvent was evaporated to dryness, and the residue was separated by silica gel column chromatography to obtain intermediate 16-2 (yield: 95%).

[0139] Synthesis of intermediate 16-3: In a 500 mL three-necked flask, intermediate 16-2 (47 mmol) and dichloromethane (100 mL) were added sequentially. The mixture was kept in an ice bath at 0 °C. Triethylamine (52 mmol) was added, followed by dropwise addition of methanesulfonyl chloride (55 mmol). The mixture was stirred for 10 min, kept at 0 °C for 30 min, then heated to room temperature and kept at 1 h. The mixture was quenched with 50 mL of ice water. The mixture was separated, washed with saturated sodium bicarbonate, and dried over anhydrous sodium sulfate. The desiccant was filtered off, the organic solvent was evaporated, and the residue was separated by silica gel column chromatography to obtain intermediate 16-3 (yield: 95.3%).

[0140] Synthesis of intermediate 16-4: In a 500 mL three-necked flask, intermediate 16-3 (45 mmol), dichloromethane (120 mL), and DBU (55 mmol) were added sequentially. The mixture was stirred at room temperature for 2 h. HPLC analysis confirmed the reaction was complete. The organic phase was washed with saturated sodium bicarbonate and dried over anhydrous sodium sulfate. The drying agent was filtered off, the organic solvent was evaporated, and the residue was separated by silica gel column chromatography to obtain intermediate 16-4 (yield: 86.3%).

[0141] Synthesis of intermediate 16-5: The synthesis method is the same as that of intermediate 1-1, yielding intermediate 16-5 (yield: 83.4%).

[0142] Synthesis of intermediate 16-6: The synthesis method was the same as that of compound 1, yielding intermediate 16-6 (yield: 66.5%).

[0143] Synthesis of compound 16: The synthesis method was the same as that of compound 1, yielding compound 16 (yield: 62.7%).

[0144] Mass spectrometry: C28H27N3O3, theoretical value: 453.21, measured value: 453.20. 1H-NMR (400MHz, CDCl3) (ppm) δ=2.42~2.56 (4H, m), 2.64~2.74 (2H, m), 3.10~3.34 (4H, m), 3.49~3.53 (3H, s), 3.93~3.99 (2H, m), 4.95~4.99 (2H, m), 7.28~7.35 (4H, m), 7.50~7.57 (4H, m), 7.93~7.96 (2H, s).

[0145] Preparation Example 5

[0146]

[0147] Synthesis of intermediate 20-1: The synthesis method was the same as that of compound 1, yielding intermediate 20-1 (yield: 63.5%).

[0148] Synthesis of Compound 20: In a 500 mL three-necked flask, intermediate 20-1 (30 mmol), ethylene oxide-2-ylmethanol (60 mmol), KOH (120 mL), and Pd-T-MOF (0.6 mmol, a complex formed by 1,3,5-benzenetricarboxylic acid and palladium) were added sequentially. The mixture was stirred under nitrogen purging and heated to reflux for 2 h. HPLC analysis confirmed the reaction was complete. The reaction solution was cooled to room temperature, filtered, and the organic solvent was evaporated to dryness. The solution was washed with ethyl acetate and water, and dried over anhydrous sodium sulfate. The drying agent was filtered off, the organic solvent was evaporated to dryness, and the residue was separated by silica gel column chromatography to obtain Compound 20 (yield: 94.3%).

[0149] Mass spectrometry: C28H27N3O4, theoretical value: 469.20, measured value: 469.18. 1H-NMR (400MHz, CDCl3) (ppm) δ=1.63~1.68 (3H, m), 2.38~2.59 (4H, m), 3.08~3.22 (2H, m), 3.98~4.08 (2H, m), 4.18~4.28 (2H, m), 4.71~4.75 (1H, m), 4.89~4.95 (3H, m), 6.95~7.03 (4H, m), 7.67~7.75 (4H, m), 7.89~7.93 (2H, s).

[0150] Preparation Example 6

[0151]

[0152] Synthesis of intermediate 23-1: The synthesis method is the same as that of intermediate 1-1, yielding intermediate 23-1 (yield: 82.6%).

[0153] Synthesis of compound 23: The synthesis method was the same as that of compound 1, yielding compound 23 (yield: 63.4%).

[0154] Mass spectrometry: C23H21N3O2, theoretical value: 371.16, measured value: 371.15. 1H-NMR (400MHz, CDCl3) (ppm) δ=2.16~2.19 (3H, m), 3.77~3.81 (6H, s), 4.28~4.31 (2H, m), 6.99~7.05 (4H, m), 7.68~7.74 (4H, m), 7.90~7.93 (2H, s).

[0155] Preparation Example 7

[0156]

[0157] Synthesis of intermediate 28-1: The synthesis method is the same as that of intermediate 3-1, yielding intermediate 28-1 (yield: 93.5%).

[0158] Synthesis of intermediate 28-2: The synthesis method is the same as that of intermediate 3-2, yielding intermediate 28-2 (yield: 90.9%).

[0159] Synthesis of intermediate 28-3: The synthesis method is the same as that of intermediate 1-1, yielding intermediate 28-3 (yield: 83.7%).

[0160] Synthesis of compound 28: The synthesis method was the same as that of compound 1, yielding compound 28 (yield: 62.4%).

[0161] Mass spectrometry: C34H43N3, theoretical value: 493.35, measured value: 493.33. 1H-NMR (400MHz, CDCl3) (ppm) δ=0.90~0.96(3H, m), 1.29~1.37(22H, m), 2.14~2.22(2H, m), 2.54~2.62(2H, m), 4.14~4.21(2H, m), 4.56~4.58(1H, m), 4.81~4.84(1H, m), 7.35~7.40(4H, m), 7.44~7.49(4H, m), 7.95~7.96(2H, s).

[0162] Preparation Example 8

[0163]

[0164] Synthesis of intermediate 30-1: The synthesis method is the same as that of intermediate 1-1, yielding intermediate 30-1 (yield: 83.8%).

[0165] Synthesis of compound 30: The synthesis method was the same as that of compound 1, yielding compound 30 (yield: 61.7%).

[0166] Mass spectrometry: C25H25N3O2, theoretical value: 399.19, measured value: 399.20. 1H-NMR (400MHz, CDCl3) (ppm) δ=1.64~1.68 (3H, m), 2.51~2.59 (2H, m), 3.77~3.81 (6H, s), 4.15~4.22 (2H, m), 4.59~4.63 (1H, m), 4.70~4.74 (1H, m), 6.99~7.05 (4H, m), 7.68~7.74 (4H, m), 7.90~7.93 (2H, s).

[0167] Preparation Example 9

[0168]

[0169] Synthesis of intermediate 33-1: The synthesis method is the same as that of intermediate 16-1, yielding intermediate 33-1 (yield: 97.5%).

[0170] Synthesis of intermediate 33-2: The synthesis method is the same as that for intermediate 16-2, yielding intermediate 33-2 (yield: 93.8%).

[0171] Synthesis of intermediate 33-3: The synthesis method is the same as that for intermediate 16-3, yielding intermediate 33-3 (yield: 95.2%).

[0172] Synthesis of intermediate 33-4: The synthesis method is the same as that for intermediate 16-4, yielding intermediate 33-4 (yield: 85.5%).

[0173] Synthesis of intermediate 33-5: The synthesis method is the same as that of intermediate 1-1, yielding intermediate 33-5 (yield: 83.2%).

[0174] Synthesis of compound 33: The synthesis method was the same as that of compound 1, yielding compound 33 (yield: 63.9%).

[0175] Mass spectrometry: C25H25N3O, theoretical value: 383.20, measured value: 383.19. 1H-NMR (400MHz, CDCl3) (ppm) δ=2.32~2.36 (6H, s), 2.59~2.67 (2H, m), 3.49~3.52 (3H, s), 4.15~4.23 (2H, m), 4.42~4.47 (2H, m), 7.13~7.19 (4H, m), 7.46~7.52 (4H, m), 7.94~7.97 (2H, s).

[0176] Preparation Example 10

[0177]

[0178] Synthesis of intermediate 53-1: The synthesis method is the same as that of intermediate 3-1, yielding intermediate 53-1 (yield: 93.5%).

[0179] Synthesis of intermediate 53-2: The synthesis method is the same as that of intermediate 3-2, yielding intermediate 53-2 (yield: 89.4%).

[0180] Synthesis of intermediate 53-3: The synthesis method is the same as that of intermediate 1-1, yielding intermediate 53-3 (yield: 83.1%).

[0181] Synthesis of compound 53: The synthesis method was the same as that of compound 1, yielding compound 53 (yield: 63.3%).

[0182] Mass spectrometry: C27H27N3, theoretical value: 393.22, measured value: 393.20. 1H-NMR (400MHz, CDCl3) (ppm) δ=1.64~1.68 (6H, m), 2.32~2.36 (6H, s), 4.71~4.75 (2H, m), 4.90~4.94 (2H, m), 6.08~6.10 (1H, m), 7.13~7.19 (4H, m), 7.46~7.52 (4H, m), 7.93~7.96 (2H, s).

[0183] Preparation Example 11

[0184]

[0185] Synthesis of intermediate 62-1: The synthesis method is the same as that of intermediate 3-1, yielding intermediate 62-1 (yield: 90.4%).

[0186] Synthesis of intermediate 62-2: The synthesis method is the same as that of intermediate 3-2, yielding intermediate 62-2 (yield: 88.2%).

[0187] Synthesis of intermediate 62-3: The synthesis method is the same as that of intermediate 1-1, yielding intermediate 62-3 (yield: 82.8%).

[0188] Synthesis of compound 62: The synthesis method was the same as that of compound 1, yielding compound 62 (yield: 62.7%).

[0189] Mass spectrometry: C33H39N3, theoretical value: 477.31, measured value: 477.30. 1H-NMR (400MHz, CDCl3) (ppm) δ=0.87~0.98(6H, m), 1.13~1.22(6H, m), 1.33~1.49(4H, m), 2.13~2.22(4H, m), 2.67~2.77(4H, m), 4.71~4.75(2H, m), 4.90~4.94(2H, m), 6.33~6.36(1H, m), 7.28~7.35(4H, m), 7.50~7.57(4H, m), 7.93~7.97(2H, s).

[0190] Preparation Example 12

[0191]

[0192] Synthesis of intermediate 73-1: The synthesis method is the same as that of intermediate 1-1, yielding intermediate 73-1 (yield: 83.2%).

[0193] Synthesis of compound 73: The synthesis method was the same as that of compound 1, yielding compound 73 (yield: 64.1%).

[0194] Mass spectrometry: C26H27N3, theoretical value: 381.22, measured value: 381.20. 1H-NMR (400MHz, CDCl3) (ppm) δ=1.64~1.68 (3H, m), 1.83~1.94 (2H, m), 2.14~2.22 (2H, m), 2.32~2.36 (6H, s), 4.15~4.21 (2H, m), 4.59~4.63 (1H, m), 4.70~4.74 (1H, m), 7.13~7.19 (4H, m), 7.46~7.52 (4H, m), 7.94~7.97 (2H, s).

[0195] Preparation Example 13

[0196]

[0197] Synthesis of intermediate 83-1: The synthesis method is the same as that of intermediate 1-1, yielding intermediate 83-1 (yield: 81.7%).

[0198] Synthesis of intermediate 83-2: The synthesis method was the same as that of compound 1, yielding intermediate 83-2 (yield: 63.0%).

[0199] Synthesis of compound 83: The synthesis method was the same as that for compound 20, yielding compound 83 (yield: 93.5%).

[0200] Mass spectrometry: C33H37N3O4, theoretical value: 539.28, measured value: 539.25. 1H-NMR (400MHz, CDCl3) (ppm) δ=1.22~1.36(2H, m), 1.63~1.68(3H, m), 1.88~2.02(2H, m), 2.14~2.39(6H, m), 2 .66~2.80(2H,m), 3.28~3.38(2H,m), 3.49~3.58(2H,m), 3.92~4.00(2H,m), 4 .32~4.36 (4H, s), 4.59~4.63 (1H, m), 4.70~4.74 (1H, m), 7.49~7.60 (10H, m).

[0201] Preparation Example 14

[0202]

[0203] Synthesis of intermediate 94-1: The synthesis method is the same as that of intermediate 1-1, yielding intermediate 94-1 (yield: 80.5%).

[0204] Synthesis of compound 94: The synthesis method was the same as that of compound 1, yielding compound 94 (yield: 62.7%).

[0205] Mass spectrometry: C35H45N3, theoretical value: 507.36, measured value: 507.39. 1H-NMR (400MHz, CDCl3) (ppm) δ=1.30~1.35(24H, m), 1.65~1.67(3H, m), 1.88~2.01(2H, m), 2.14~2.22(2H, m), 4.12~4.19(2H, m), 4.60~4.63(1H, m), 4.71~4.73(1H, m), 7.35~7.40(4H, m), 7.44~7.49(4H, m), 7.95~7.96(2H, s).

[0206] Encapsulation film examples

[0207] The preparation method of the encapsulating film includes the following steps:

[0208] The matrix material, UV conversion agent, photoinitiator, light stabilizer, crosslinking agent, co-crosslinking agent, antioxidant, and silane coupling agent are mixed evenly in a mixing tank and then fed into a twin-screw extruder. The mixture is kneaded at 90°C and 200 rpm. After that, it is plasticized, extruded, stretched, drawn, and wound in a casting machine to obtain a UV conversion encapsulation film with a thickness of 0.5 mm.

[0209] Example 1 of encapsulating film

[0210] This embodiment provides an ultraviolet light conversion encapsulating film, prepared using the above-described preparation method. The base material is 100g of ethylene-vinyl acetate copolymer, the ultraviolet light converter is 0.1g of compound 1, the photoinitiator is 1g of 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butanone, the light stabilizer is 0.1g of bis-2,2,6,6-tetramethylpiperidinol sebacate, the crosslinking agent is 0.5g of 2-ethylhexyl carbonate tert-butyl peroxide, the co-crosslinking agent is 0.5g of N,N′-m-phenylbismaleimide, the antioxidant is 0.05g of tri(nonylphenyl) phosphite, and the silane coupling agent is 0.2g of 3-thiopropyltriethoxysilane.

[0211] Encapsulation film Examples 2-14:

[0212] Encapsulating films Example 2-Example 14 were prepared using a method similar to that used in Encapsulating Film Example 1, except that compound 1 in Encapsulating Film Example 1 was replaced with the compounds in Table 1.

[0213] Comparative Example 1 and Comparative Example 2 of Encapsulating Film:

[0214] Comparative Examples 1 and 2 of encapsulating films were prepared using a method similar to that used in Example 1 of the encapsulating film, except that compound 1 in Example 1 of the encapsulating film was replaced with Ref1 and Ref2, respectively.

[0215]

[0216] Test case

[0217] Performance tests were conducted on the ultraviolet light conversion encapsulating films obtained in the examples and comparative examples of encapsulating films:

[0218] The transmittance test standard is in accordance with GB / T29848-2018. The transmittance test is conducted using a specific UV-Vis spectrophotometer (PerkinElmer LAMBDA 950); the test is performed in the visible light band.

[0219] UV aging resistance test: Tested according to IEC61215 standard. Test conditions: Sample area 12cm*6cm, irradiance 120W / m2, tested for 1440h, temperature 85℃, humidity 85%, the attenuation rate compared to the initial brightness was tested; Photovoltaic conversion efficiency was tested on photovoltaic modules including encapsulating film examples and encapsulating film comparative examples. The photovoltaic module was prepared by: neatly stacking photovoltaic glass, UV conversion encapsulating film, solar cells, UV conversion encapsulating film and photovoltaic backsheet, and placing them in a laminator for lamination at 100℃ for 20min, lamination pressure 60KPa, removing and cooling to obtain the photovoltaic module. (The two UV conversion encapsulating films in the same photovoltaic module are of the same type).

[0220] Photovoltaic conversion efficiency test: A standard sunlight was emitted using a solar simulator for testing (spectral AM1.5G, incident power 100mW / cm2, temperature 25℃).

[0221] The test results are shown in Table 1. The calculation method for the photoelectric conversion efficiency improvement rate in Table 1 is as follows: the photoelectric conversion efficiency of Comparative Example 1 of the encapsulating film is used as the comparison standard of 100%, and the photoelectric conversion efficiency of the other encapsulating films is compared with it to calculate the improvement rate. Photoelectric conversion efficiency improvement rate % = (photoelectric conversion efficiency of the encapsulating film in the current example - photoelectric conversion efficiency of Comparative Example 1 of the encapsulating film) / photoelectric conversion efficiency of Comparative Example 1 of the encapsulating film × 100%.

[0222] Table 1

[0223] Example UV converter Visible light transmittance % Photovoltaic conversion efficiency % Brightness attenuation rate (%) Example 1 of encapsulating film Compound 1 95.2 0.90 34.2 Encapsulation film Example 2 Compound 3 94.3 0.88 34.9 Encapsulation film Example 3 Compound 7 94.7 0.93 33.7 Encapsulation film Example 4 Compound 16 93.4 0.82 35.1 Encapsulation film Example 5 Compound 20 93.1 0.85 35.4 Encapsulation film Example 6 Compound 23 94.2 0.63 37.2 Encapsulation film Example 7 Compound 28 92.3 0.84 35.3 Encapsulation film Example 8 Compound 30 92.6 0.79 36.0 Encapsulation film Example 9 Compound 33 94.0 0.80 35.8 Encapsulation film Example 10 Compound 53 92.8 0.84 35.4 Encapsulation film Example 11 Compound 62 92.3 0.82 35.7 Encapsulation film Example 12 Compound 73 94.1 0.85 35.3 Encapsulation film Example 13 Compound 83 93.5 0.81 36.1 Encapsulation film Example 14 Compound 94 92.4 0.78 36.5 Comparative Example 1 of Encapsulating Film Ref1 94.8 -- 58.9 Comparative Example 2 of Encapsulation Film Ref2 94.5 0.33 52.5

[0224] As can be seen from the above results, the organic compound provided by the present invention, when added to the film, especially when used as an ultraviolet light conversion encapsulation film in solar cell modules, can effectively absorb ultraviolet light and convert it into visible light, thereby significantly improving the light conversion efficiency of solar photovoltaic modules.

[0225] 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 inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. An organic compound, characterized in that, The organic compound has the structure shown in formula (I). In equation (I), n and m are each independently 0, 1, 2, 3, 4 or 5; R 14 H or -(CR) 11 R 12 )mC(CH2)-R 13 ; R 11 and R 12 Each is independently an H, C1-C6 alkyl group; or, R 11 and R 12 Together they form a tubeene structure; R 13 C1-C6 alkoxy groups that are unsubstituted or substituted with C1-C6 alkoxy groups 12 Alkyl, C1-C 12 alkoxy groups; R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 12 Alkyl groups, unsubstituted or substituted by at least one group in combination A, C1-C 12 The combination A comprises any one of the following: an alkoxy group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a C3-C6 cycloalkyl group; wherein the combination A consists of a C1-C6 alkoxy group, a C3-C6 cycloalkyl group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is selected from at least one of N, O, and S.

2. The organic compound according to claim 1, characterized in that, In equation (I), n and m are each independently 0, 1, 2, 3, 4 or 5; R 14 H or -(CR) 11 R 12 )mC(CH2)-R 13 ; R 11 and R 12 Each is independently an H, C1-C4 alkyl group; or, R 11 and R 12 Together they form a tubeene structure; R 13 C1-C4 alkoxy groups that are unsubstituted or substituted with C1-C4 alkoxy groups 10 Alkyl groups, C1-C8 alkoxy groups; R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 10 The combination comprises any one of the following: an alkyl group, an unsubstituted or substituted C1-C8 alkoxy group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a C3-C6 cycloalkyl group; wherein the combination A consists of a C1-C6 alkoxy group, a C3-C6 cycloalkyl group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is O and / or S. Preferably, the organic compound represented by formula (I) is selected from any one of the following:

3. The organic compound according to claim 1 or 2, characterized in that, In equation (I), n is 1, m is 0; R 14 For H or -C(CH2)-R 13 ; R 13 C1-C4 alkoxy groups that are unsubstituted or substituted with C1-C4 alkoxy groups 10 Alkyl groups, C1-C8 alkoxy groups; R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 10 The combination comprises any one of the following: alkyl group, unsubstituted or substituted C1-C8 alkoxy group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and C3-C6 cycloalkyl group; wherein the combination A consists of C1-C6 alkoxy group, C3-C6 cycloalkyl group, 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is O and / or S.

4. The organic compound according to claim 3, characterized in that, In equation (I), n is 1, m is 0; R 14 For H; R 13 C1-C4 alkoxy groups that are unsubstituted or substituted with C1-C4 alkoxy groups 10 Alkyl groups, C1-C8 alkoxy groups; R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 10 The combination comprises any one of the following: an alkyl group, an unsubstituted or substituted C1-C8 alkoxy group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a C3-C6 cycloalkyl group; wherein the combination A consists of a C1-C6 alkoxy group, a C3-C6 cycloalkyl group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is O and / or S. Preferably, the organic compound represented by formula (I) is selected from any one of the following:

5. The organic compound according to claim 3, characterized in that, In equation (I), n is 1, m is 0; R 14 -C(CH2)-R 13 ; R 13 C1-C4 alkoxy groups that are unsubstituted or substituted with C1-C4 alkoxy groups 10 Alkyl groups, C1-C8 alkoxy groups; R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 10 The combination comprises any one of the following: an alkyl group, an unsubstituted or substituted C1-C8 alkoxy group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a C3-C6 cycloalkyl group; wherein the combination A consists of a C1-C6 alkoxy group, a C3-C6 cycloalkyl group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is O and / or S. Preferably, the organic compound represented by formula (I) is selected from any one of the following:

6. The organic compound according to claim 1 or 2, characterized in that, In equation (I), n is 1, and m is 2, 3, 4 or 5; R 13 C1-C4 alkoxy groups that are unsubstituted or substituted with C1-C4 alkoxy groups 10 Alkyl groups, C1-C8 alkoxy groups; R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 10 The combination comprises any one of the following: an alkyl group, an unsubstituted or substituted C1-C8 alkoxy group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a C3-C6 cycloalkyl group; wherein the combination A consists of a C1-C6 alkoxy group, a C3-C6 cycloalkyl group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is O and / or S. Preferably, the organic compound represented by formula (I) is selected from any one of the following:

7. The organic compound according to claim 1 or 2, characterized in that, In equation (I), n is 1 and m is 1; R 14 For H; R 11 and R 12 Each is independently an H, C1-C4 alkyl group; or, R 11 and R 12 Together they form a tubeene structure; R 13 C1-C4 alkoxy groups that are unsubstituted or substituted with C1-C4 alkoxy groups 10 Alkyl groups, C1-C8 alkoxy groups; R2 is selected from hydroxyl, unsubstituted, or substituted groups from at least one group in combination A, of the C1-C group. 10 The combination comprises any one of the following: an alkyl group, an unsubstituted or substituted C1-C8 alkoxy group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a C3-C6 cycloalkyl group; wherein the combination A consists of a C1-C6 alkoxy group, a C3-C6 cycloalkyl group, a 3-6 membered heterocyclic alkyl group containing at least one heteroatom, and a 3-6 membered heterocyclic alkoxy group containing at least one heteroatom; wherein the heteroatom is O and / or S. Preferably, the organic compound represented by formula (I) is selected from any one of the following:

8. The use of the organic compound according to any one of claims 1-7 in encapsulating adhesives; Preferably, the encapsulating adhesive is a light conversion encapsulating adhesive; More preferably, the encapsulating adhesive is an ultraviolet light conversion encapsulating adhesive.

9. A composition for encapsulating adhesive, characterized in that, The composition contains 100 parts by weight of matrix material, 0.005-2 parts by weight of ultraviolet light converter, 0-2 parts by weight of photoinitiator, 0.1-1 parts by weight of light stabilizer, 0-3 parts by weight of crosslinking agent, 0-2 parts by weight of co-crosslinking agent, 0.05-1 parts by weight of antioxidant and 0.2-1 parts by weight of silane coupling agent; The ultraviolet light converter is selected from at least one of the organic compounds described in any one of claims 1-7.

10. A method for preparing an encapsulating adhesive, characterized in that, The method includes: curing material I containing each component of the composition to obtain the encapsulating adhesive; The composition is the encapsulating adhesive composition as described in claim 9.

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