Light conversion adhesive film composition, light conversion adhesive film and photovoltaic module

Abstract

The invention provides a light conversion adhesive film composition, a light conversion adhesive film and a photovoltaic module. The light conversion adhesive film composition comprises, by mass, 80%-99.98% of matrix resin, 0.01%-10% of a light conversion agent and 0.01%-10% of an auxiliary agent, the light conversion agent is a pyrenyl compound, the maximum absorption wavelength is 350-420 nm, and the maximum emission wavelength is larger than 450 nm. According to the present invention, by using the characteristics of large pyrenyl conjugated system, energy level synthesis and many active sites in the pyrenyl compound, the pyrenyl compound having the structure represented by the formula (A) and / or the formula (B) is adopted as the light conversion agent to be used in the adhesive film composition, and by using the excellent photoelectric property of the pyrenyl, the good absorption and emission wavelength is achieved by introducing the electron donating group, and the high quantum efficiency is achieved at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of light conversion agents, and in particular, to a light conversion adhesive film composition, a light conversion adhesive film, and a photovoltaic module. Background Art

[0002] Solar energy refers to the thermal radiation energy of the sun. Due to its wide source, huge total amount and durability, it has become one of the important sustainable energy sources at present. Currently, the best device for utilizing solar energy is a solar cell, which can directly convert the light energy in sunlight into electrical energy, so the utilization rate of solar energy is high.

[0003] The HJT cell, that is, the intrinsic thin-film heterojunction cell, has become one of the research hotspots in the field of solar cells. With the continuous progress of technology and the continuous reduction of costs, the HJT cell is expected to become one of the mainstream technologies of solar cells in the future. However, the HJT has a low utilization rate of ultraviolet light, and the stability of the cell will be greatly weakened under ultraviolet irradiation. In order to avoid the damage of ultraviolet light and utilize this part of ultraviolet light at the same time, the light conversion film came into being.

[0004] The light conversion film can convert light of one wavelength into light of another wavelength. In the photovoltaic field, it mainly converts ultraviolet light into visible light, and its light conversion function mainly comes from the light conversion agent in it. The light conversion agent can be divided into three categories: organic, organic-inorganic hybrid, and inorganic. Among them, the organic light conversion agent is the mainstream of the current light conversion agent due to its strong ability to absorb ultraviolet light and easy modification.

[0005] The current light conversion agent technology has significantly improved the light stability, but there is still room for improvement in the intensity of ultraviolet absorption and the wavelength of the emitted light. The emission wavelength of the current light conversion film on the market is fixed at about 420 nm. For the current HJT cells, the utilization rate of light at about 420 nm is less than 80%. That is, the utilization rate of sunlight is insufficient.

[0006] In view of this, the present application is specifically proposed. Summary of the Invention

[0007] The main purpose of the present application is to provide a light conversion adhesive film composition, a light conversion adhesive film, and a photovoltaic module to solve the problem in the prior art that the emission wavelength of the light conversion agent is relatively low, resulting in low utilization rate of sunlight.

[0008] To achieve the above object, according to one aspect of the present application, a light conversion adhesive film composition is provided. Calculated by mass percentage, the light conversion adhesive film composition includes: 80-99.98% of a matrix resin, 0.01-10% of a light conversion agent, and 0.01-10% of an auxiliary agent; wherein, the light conversion agent is a pyrene compound, and the pyrene compound is selected from the structures shown in the following formula (A) and / or formula (B):

[0009]

[0010] Wherein, R1 is a substituted or unsubstituted first group, and the first group is selected from C6-C20 aryl, C4-C20 heteroaryl or R a -N(R b )*, and Ra and Rb are each independently selected from C6-C20 aryl, C4-C20 heteroaryl; R2, R A , R B and R C are each independently H, a substituted or unsubstituted second group, and the second group is selected from C1-C20 alkyl, C3-C20 cycloalkyl, C1-C20 heterocycloalkyl, C2-C20 alkenyl, C6-C20 aryl, C4-C20 heteroaryl, C1-C10 alkyl C6-C20 aryl, C1-C10 alkoxy C6-C20 aryl, C6-C20 aryloxy or R a -N(R b )*, and R a and R b are each independently selected from C6-C20 aryl, C4-C20 heteroaryl; m, p and q are each independently natural numbers between 1 and 5; n and w are each independently natural numbers between 1 and 9; and the maximum absorption wavelength of the light conversion agent is located at 350-420 nm, and the maximum emission wavelength is greater than 450 nm.

[0011] Further, the first group is selected from C6-C10 aryl, C4-C10 heteroaryl or R a -N(R b )*, and R a and R b are each independently selected from C6-C10 aryl, C4-C10 heteroaryl.

[0012] Further, the second group is selected from C1-C10 alkyl, C3-C10 cycloalkyl, C1-C10 heterocycloalkyl, C2-C10 alkenyl, C6-C10 aryl, C4-C10 heteroaryl, C1-C10 alkyl C6-C10 aryl, C1-C10 alkoxy C6-C10 aryl, C6-C10 aryloxy or R a -N(R b )*, and R a and R b are each independently selected from C6-C10 aryl, C4-C10 heteroaryl.

[0013] Further, the first group is selected from phenyl, biphenyl, phenyl-N(phenyl)*, pyridyl, pyrazolyl, imidazolyl, imidazolyl, thiazolyl, furyl, thiophenyl, pyrimidinyl, pyrazinyl.

[0014] Further, the second group is selected from the group consisting of cyclopentyl, cyclohexyl, vinyl, propenyl, butenyl, phenyl, methylphenyl, ethylphenyl, biphenyl, methoxyaryl, diphenylamino, pyridyl, pyrazolyl, imidazolyl, thiazolyl, furyl, thienyl, pyrimidinyl, pyrazinyl.

[0015] Further, the light conversion agent is selected from at least one of the compounds of formula (a) and / or formula (b) as follows:

[0016]

[0017] Wherein, R1 is selected from phenyl, biphenyl, diphenylamino; R2 is selected from H, vinyl, propenyl, butenyl, methoxyphenyl, ethoxyphenyl, cyclohexyl, phenyl, isopropylphenyl, methylphenyl, ethylphenyl; R A 、R B are each independently selected from H, vinyl, propenyl, butenyl, phenyl, dimethyldiphenylamino, diethyldiphenylamino, di-tert-butyldiphenylamino; R c are each independently selected from H, vinyl, propenyl, butenyl, phenyl, isopropylphenyl, methylphenyl, ethylphenyl, dimethyldiphenylamino, diethyldiphenylamino, di-tert-butyldiphenylamino.

[0018] Further, the light conversion agent is selected from at least one of the following compounds:

[0019]

[0020] Further, the auxiliary agent includes a crosslinking agent and / or a co-crosslinking agent.

[0021] Further, the mass content of the crosslinking agent is 0.005 - 5%.

[0022] Further, the mass content of the co-crosslinking agent is 0.005 - 5%.

[0023] Further, the auxiliary agent further includes a tackifier, and the tackifier includes at least one selected from the group consisting of γ-aminopropyltriethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, vinyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, γ-glycidyletheroxypropyltrimethylsilane, 3-aminopropyltrimethylsilane.

[0024] Further, the auxiliary agent further includes polyol compounds and / or polyester compounds; preferably, the mass of the hydroxyl groups in the polyol compounds is 0.1-20%, preferably 0.5-10%, of the mass of the polyol compounds, preferably the molecular weight of the polyol compounds is 500-80,000, and preferably the polyol compounds are selected from any one or more of polyvinyl alcohol compounds, polyethylene glycol, and polypropylene glycol; preferably, the polyester compounds mainly include polyester-based polyurethanes and polyester polyols; preferably, at least one of polyethylene terephthalate and polyurethane.

[0025] Further, the matrix resin is selected from at least one of EVA resin, POE resin, PVB resin, ethylene-acrylate resin, ethylene-methacrylate resin, and liquid silicone.

[0026] According to the second aspect of the present application, the present application also provides a light conversion film, which is prepared by mixing and molding a film composition, and the film composition is the light conversion film composition provided in the first aspect above.

[0027] According to the third aspect of the present application, the present application also provides a photovoltaic module, and the photovoltaic module includes the light conversion film provided in the second aspect above.

[0028] Applying the technical solution of the present application, the present application utilizes the characteristics of the pyrene-based conjugate system in the pyrene-based compound being large, the energy level synthesis being good, and the active sites being many, and uses the pyrene-based compound with the structure of formula (A) and / or formula (B) as a light conversion agent in the film composition. Utilizing the excellent optoelectronic properties of the pyrene group, by introducing an electron-donating group, good absorption and emission wavelengths are achieved, and at the same time, a high quantum efficiency is achieved. Among them, the pyrene-based light conversion agent with the structure of formula (A) can be used as a blue light conversion material, with an absorption wavelength of about 360 nm, an emission wavelength of about 470 nm, and a quantum efficiency of about 80%; the pyrene-based light conversion agent with the structure of formula (B) can be used as a green light conversion material, with an absorption wavelength of about 400 nm, an emission wavelength of about 500 nm, and a quantum efficiency of about 85%. Using at least one of the pyrene-based compounds with the two structures as a light conversion agent in the light conversion film composition, the emission wavelength is red-shifted compared with the prior art, both above 450 nm, which can effectively promote a significant increase in the quantum efficiency and make further full use of sunlight, thus meeting the needs of HJT cells. Specific Embodiments

[0029] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will describe the present application in detail with reference to the embodiments.

[0030] In the present application, the term "substituted or unsubstituted" in "substituted" means that a hydrogen atom in a certain functional group is replaced by another atom or group (i.e., a substituent). Such substituents are each independently selected from at least one of the following groups: deuterium, halogen, C1-C10 alkyl, C1-C10 alkoxy, C6-C10 aryl, C4-C10 heteroaryl, C3-C10 cycloalkyl, C4-C7 heterocycloalkyl, tris-(C1-C10)alkylsilyl, tris-(C1-C10)arylsilyl, di-(C1-C10)alkyl-(C6-C10)arylsilyl, C1-C10 alkyldi-(C6-C10)arylsilyl, C2-C10 alkenyl, C2-C10 alkynyl, cyano, di-(C1-C10)alkylamino, C1-C10 alkyl, C6-C10 arylC1-C10 alkyl, C1-C10 alkylC6-C10 aryl, carboxyl, nitro, and hydroxyl. In addition, the carbon atom number ranges herein can be extended from the lower limit value to the upper limit value. For example, C6-C20 means that the number of carbon atoms can be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20.

[0031] The term "aryl" means aryl or (sub)aryl, and the aryl refers to a monocyclic or fused polycyclic derived from an aromatic hydrocarbon, and includes phenyl, biphenyl, terphenyl, naphthyl, binaphthyl, phenylnaphthyl, naphthylphenyl, fluorenyl, phenylfluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, phenylphenanthrenyl, anthracenyl, indenyl, terphenylene, pyrenyl, tetrabenzo[a,c,g,i]fluorene, perylenyl, chrysenyl, naphthacenyl, propellano[1,2-b]fluorene, etc.

[0032] The term "heteroaryl" means heteroaryl or (sub)heteroaryl, and the heteroaryl refers to an aryl having a ring backbone atom containing at least one heteroatom selected from the group consisting of N, O, and S. It can be a monocyclic ring such as furyl, thienyl, pyrrolyl, imidazolyl, pyrazolyl, thiazolyl, thiadiazolyl, isothiazolyl, isoxazolyl, oxazolyl, oxadiazolyl, triazinyl, tetrazinyl, triazolyl, tetrazolyl, furazanyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, etc., or a fused ring condensed with at least one benzene ring, such as benzofuryl, benzothienyl, isobenzofuryl, dibenzofuryl, dibenzothienyl, benzimidazolyl, benzothiazolyl, benzoisothiazolyl, benzoisoxazolyl, quinolinyl, isoquinolinyl, cinnolinyl, quinazolinyl, quinoxalinyl, carbazolyl, phenoxazinyl, phenanthridinyl, benzacenaphthylenyl, dihydroacridinyl, etc.

[0033] As analyzed in the background art of this application, existing HJT cells use a light conversion film to improve the utilization rate of ultraviolet light. However, the emission wavelength of the light conversion film on the current market is fixed at about 420 nm, the light utilization rate is less than 80%, and the utilization rate of sunlight is insufficient. In order to improve the utilization rate of sunlight and meet the requirements of HJT cells, this application provides a light conversion adhesive film composition, a light conversion adhesive film, and a photovoltaic module.

[0034] In the first typical embodiment of this application, a light conversion adhesive film composition is provided. In terms of mass percentage, the light conversion adhesive film composition includes: 80-99.98% of a matrix resin, 0.01-10% of a light conversion agent, and 0.01-10% of an auxiliary agent; wherein, the light conversion agent is a pyrene compound, and the pyrene compound is selected from the structures shown in the following formula (A) and / or formula (B):

[0035]

[0036] Wherein, R1 is a substituted or unsubstituted first group, and the first group is selected from C6-C20 aryl, C4-C20 heteroaryl, or R a -N(R b )*, and R a and R b are each independently selected from C6-C20 aryl, C4-C20 heteroaryl; R2, R A , R B and R C are each independently H, a substituted or unsubstituted second group, and the second group is selected from C1-C20 alkyl, C3-C20 cycloalkyl, C1-C20 heterocycloalkyl, C2-C20 alkenyl, C6-C20 aryl, C4-C20 heteroaryl, C1-C10 alkyl C6-C20 aryl, C1-C10 alkoxy C6-C20 aryl, C6-C20 aryloxy or R a -N(R b )*, and Ra and Rb are each independently selected from C6-C20 aryl, C4-C20 heteroaryl; m, p, and q are each independently natural numbers between 1 and 5; n and w are each independently natural numbers between 1 and 9; the maximum absorption wavelength of the light conversion agent is located at 350-420 nm, and the maximum emission wavelength is greater than 450 nm.

[0037] In this application, H at any position in the first group and the second group can be substituted. m, p, and q are each independently 1, 2, 3, 4, 5; and when m≥2, multiple R1s can be the same or different; when p≥2, multiple R A can be the same or different; when q≥2, multiple R BThey may be the same or different. n and w are each independently 1, 2, 3, 4, 5, 6, 7, 8, 9; and when n ≥ 2, multiple R2s may be the same or different; when w ≥ 2, multiple Rs c They may be the same or different.

[0038] Applying the technical solution of the present application, the present application utilizes the characteristics of a large pyrene-based conjugate system, energy level synthesis, and many active sites in pyrene-based compounds, and uses pyrene-based compounds with the structure of formula (A) and / or formula (B) as light conversion agents in the film composition. Utilizing the excellent optoelectronic properties of the pyrene group, by introducing an electron-donating group (aryl or non-aryl), good absorption and emission wavelengths can be achieved, and at the same time, a high quantum efficiency can be achieved. Among them, the pyrene-based light conversion agent with the structure of formula (A) can be used as a blue light conversion material, with an absorption wavelength of about 360 nm, an emission at about 470 nm, and a quantum efficiency of about 80%; the pyrene-based light conversion agent with the structure of formula (B) can be used as a green light conversion material, with an absorption wavelength of about 400 nm, an emission at about 500 nm, and a quantum efficiency of about 85%. Using at least one of the two structures of pyrene-based compounds as a light conversion agent in the light conversion film composition, the emission wavelength is redshifted compared with the prior art, all above 450 nm, which can effectively promote a significant increase in the quantum efficiency and make further full use of sunlight, thus meeting the needs of HJT batteries.

[0039] In some embodiments of the present application, the first group is selected from C6-C10 aryl, C4-C10 heteroaryl, or R a -N(R b )*, and R a and R b are each independently selected from C6-C10 aryl, C4-C10 heteroaryl; the second group is selected from C1-C10 alkyl, C3-C10 cycloalkyl, C1-C10 heterocycloalkyl, C2-C10 alkenyl, C6-C10 aryl, C4-C10 heteroaryl, C1-C10 alkyl C6-C10 aryl, C1-C10 alkoxy C6-C10 aryl, C6-C10 aryloxy or R a -N(R b )*, and R a and R b are each independently selected from C6-C10 aryl, C4-C10 heteroaryl; preferably, when the first group and the second group each independently have substituents, the substituents are selected from C1-C6 alkyl, C1-C6 alkoxy, and C6-10 aryl, which is more conducive to improving the light conversion efficiency of the light conversion agent.

[0040] It should be noted that when the first group or the second group is each independently selected from R a -N(R b )*, R a and R bThe H atoms therein can all be substituted, and the specific substituents are as described above and will not be elaborated here.

[0041] In some embodiments of the present application, the first group is selected from phenyl, biphenyl, diphenylamino, pyridyl, pyrazolyl, imidazolyl, thiazolyl, furyl, thienyl, pyrimidinyl, pyrazinyl; the second group is selected from cyclopentyl, cyclohexyl, vinyl, propenyl, butenyl, phenyl, methylphenyl, ethylphenyl, biphenyl, methoxyaryl, ethoxyaryl, diphenylamino, pyridyl, pyrazolyl, imidazolyl, thiazolyl, furyl, thienyl, pyrimidinyl, pyrazinyl; preferably, when the first group and the second group each independently have substituents, and the substituents are selected from C1-C4 alkyl, C1-C4 alkoxy, C6-C8 aryl, when the compound of formula (A) and / or formula (B) is used as a light conversion agent, its quantum efficiency is higher.

[0042] In some embodiments of the present application, when the light conversion agent is selected from at least one of the compounds of formula (a) and / or formula (b) below, the dequantum efficiency and the light conversion efficiency are both significantly improved.

[0043]

[0044] Wherein, R1 is selected from phenyl, biphenyl, phenyl-N(phenyl)*; R2 is selected from H, vinyl, propenyl, butenyl, methoxyphenyl, ethoxyphenyl, cyclohexyl, phenyl, isopropylphenyl, methylphenyl, ethylphenyl, dimethylphenyl, diisopropylphenylamino,; R c each independently is selected from H, vinyl, propenyl, butenyl, phenyl, isopropylphenyl, methylphenyl, ethylphenyl, dimethyldiphenylamino, diethyldiphenylamino, di-tert-butyldiphenylamino.

[0045] In some embodiments, the light conversion agent is selected from at least one of the following compounds:

[0046]

[0047] The above compounds are all prepared by conventional methods in the art.

[0048] The synthetic route and synthetic steps of are as follows:

[0049]

[0050] 1-Bromopyrene (12 g, 42.68 mmol), 4-triphenylamineboronic acid (12.34 g, 42.67 mmol), potassium carbonate (12.97 g, 93.85 mmol), and tetrakis(triphenylphosphine)palladium(0) (1.43 g, 1.28 mmol) were added to a 500 ml round-bottom flask. After adding 200 ml of toluene and 50 ml of water, the mixture was evacuated and purged with nitrogen three times. Then, the reaction was carried out at 100 °C for 18 hours under nitrogen protection. After the reaction was completed, it was cooled to room temperature. The reaction solution was washed with water and extracted three times with dichloromethane. The organic phase was dried over anhydrous sodium sulfate and then rotary evaporated. Subsequently, recrystallization was carried out with 300 ml of a mixed solvent of EA (ethyl acetate):EtOH (ethanol) = 1:1 (mass ratio). A light green solid product of 13.87 g was obtained, with a yield of 72.9%.

[0051] Exemplarily, The synthetic route and synthesis steps are as follows:

[0052]

[0053] 1,6-Dibromopyrene (10 g, 27.78 mmol), 4,4'-di-tert-butyl diphenylamine (17.19 g, 61.11 mmol), tri-tert-butyl borate tetrafluoride (3.54 g, 12.22 mmol), and potassium tert-butoxide (3.11 g, 27.78 mmol) were added to a 500 ml round-bottom flask. After adding 200 mL of toluene, the mixture was evacuated and purged with nitrogen three times. Then, the reaction was carried out at 100 °C for 18 hours under nitrogen protection. After the reaction was completed, it was cooled to room temperature and washed three times with water and then extracted three times with dichloromethane. The organic phase was dried over anhydrous magnesium sulfate and then rotary evaporated. The obtained yellow-brown solid was recrystallized with a mixed solvent of DCM (dichloromethane):EtOH (ethanol) = 1:5 (mass ratio) to obtain 19.03 g of a yellow-green solid, with a yield of 90%.

[0054] [Matrix resin]

[0055] In this application, the matrix resin is a resin commonly used in the art, including but not limited to any one or more of EVA resin, POE resin, PVB resin, ethylene-acrylate resin, ethylene-methacrylate resin, and liquid silicone. The above-mentioned EVA resin refers to ethylene-vinyl acetate copolymer; POE resin refers to polyolefin elastomer; PVB resin refers to polyvinyl butyral resin.

[0056] [Additives]

[0057] In the light conversion film composition provided by this application, the introduction of additives improves the light stability and thermal stability of the composition, thereby enabling the composition to have better light conversion ability.

[0058] In some embodiments of the present application, the above-mentioned auxiliary agents include crosslinking agents and / or co-crosslinking agents. Specifically, the mass content of the crosslinking agent is 0.005 to 5%, such as 0.005%, 0.01%, 0.02%, 0.05%, 0.08%, 0.1%, 0.2%, 0.5%, 1%, 2%, 3%, 4%, 5% or a range value composed of any two numerical values. Specifically, the mass content of the co-crosslinking agent is 0.005 to 5%, such as 0.005%, 0.01%, 0.02%, 0.05%, 0.08%, 0.1%, 0.2%, 0.5%, 1%, 2%, 3%, 4%, 5% or a range value composed of any two numerical values.

[0059] The crosslinking agent is a molecule with multiple ethylenically unsaturated groups, which can promote the crosslinking of polymers to achieve a higher degree of crosslinking. The crosslinking agent in the above-mentioned composition can be selected from the types commonly used in the art. Preferably, the crosslinking agent is selected from any one or more of isopropyl percarbonate tert-butyl, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 2-ethylhexyl percarbonate tert-butyl, 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 1,1-bis(tert-amylperoxy)-3,3,5-trimethylcyclohexane, 1,1-bis(tert-amylperoxy)cyclohexane, 1,1-bis(tert-butylperoxy)cyclohexane, 2,2-bis(tert-butylperoxy)butane, tert-amyl 2-ethylhexyl percarbonate, 2,5-dimethyl 2,5-dimethyl 2,5-dimethyl 2,5-bis(benzoylperoxy)-hexane, tert-amyl percarbonate, tert-butyl 3,3,5-trimethylhexanoate peroxide. Preferably, the co-crosslinking agent is selected from any one or more of triallyl isocyanurate, triallyl cyanurate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, pentaerythritol triacrylate, tris(2-hydroxyethyl)isocyanurate triacrylate, ethoxylated trimethylolpropane triacrylate, propoxylated trimethylolpropane triacrylate, ethoxylated glycerol triacrylate, propoxylated glycerol triacrylate, pentaerythritol tetraacrylate, ethoxylated pentaerythritol tetraacrylate, trimethylolpropane tetraacrylate, bis-trimethylolpropane tetraacrylate, bis-trimethylolpropane tetramethacrylate, propoxylated pentaerythritol tetraacrylate, 2,4,6-tris(2-propenyloxy)-1,3,5-triazine, tricyclodecane dimethanol diacrylate, propoxylated neopentyl glycol diacrylate, ethoxylated bisphenol A diacrylate, ethoxylated bisphenol A dimethacrylate, 2-butyl-2-ethyl-1,3-propanediol diacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate and polyethylene glycol dimethacrylate.

[0060] In some embodiments of the present application, the additive further includes a tackifier. The addition of the tackifier can improve the bonding performance between the adhesive film and the substrate. In a preferred embodiment, the tackifier includes, but is not limited to, one or more of the group consisting of γ-aminopropyltriethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, vinyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, γ-glycidyletheroxypropyltrimethylsilane, 3-aminopropyltrimethylsilane.

[0061] In some embodiments of the present application, the additive further includes a polyol compound and / or a polyester compound; preferably, the mass of the hydroxyl group in the polyol compound is 0.1-20% of the mass of the polyol compound, such as 0.1%, 0.2%, 0.5%, 1%, 2%, 5%, 8%, 10%, 12%, 15%, 18%, 20% or a range value composed of any two values. In particular, when the mass of the hydroxyl group in the polymer is 0.5-10% of the mass of the polyol compound, it is more beneficial to improve the uniformity of dispersion among the components in the light conversion adhesive film composition.

[0062] Limited by the large rigidity of the light conversion agent itself, its compatibility with the matrix resin is not very good. The alkyl main chain of the polyol compound additive is similar to the components of the matrix resin, and the hydroxyl functional groups contained in the side chain of the polyol compound additive form hydrogen bonds with the ester functional groups of the light conversion agent. The content of the hydroxyl group in the preferred polyol compound is within the above range, which helps to enhance the compatibility between the light conversion agent and the matrix resin. Thus, under the dual action of similar compatibility and hydrogen bonds, the compatibility between the light conversion agent and the matrix resin is further enhanced.

[0063] In some embodiments, preferably, the molecular weight of the polyol compound is 500-80,000, such as 500, 800, 1000, 1500, 2000, 3000, 4000, 5000, 6000, 7000, 8000 or a range value composed of any two values.

[0064] The above polyol compounds include, but are not limited to, any one or more of polyvinyl alcohol compounds, polyethylene glycol, and polypropylene glycol; the above polyester compounds include, but are not limited to, mainly polyester-based polyurethanes and polyester polyols; preferably, at least one of polyethylene terephthalate and polyurethane.

[0065] In some embodiments of the present application, the matrix resin is a commonly used resin in the art, including but not limited to any one or more of EVA resin, POE resin, PVB resin, ethylene-acrylate resin, ethylene-methacrylate resin, and liquid silicone. The above-mentioned EVA resin refers to ethylene-vinyl acetate copolymer; POE resin refers to polyolefin elastomer; PVB resin refers to polyvinyl butyral resin.

[0066] In the second typical embodiment of the present application, a light conversion film is further provided, which is prepared by mixing and molding a film composition, wherein the film composition is the light conversion film composition provided in the first typical embodiment.

[0067] The light conversion film provided by the present application is obtained by mixing the foregoing light conversion film composition evenly and then through preparation processes such as melt extrusion molding at 80-120°C. The obtained light conversion film has both excellent stability and high luminous efficiency, can redshift the emission wavelength to above 450 nm, can effectively promote a significant increase in quantum efficiency, and enables further full utilization of sunlight, thus meeting the needs of HJT cells.

[0068] In the third typical embodiment of the present application, a photovoltaic module is further provided, and the photovoltaic module includes the light conversion film provided in the second typical embodiment.

[0069] The photovoltaic module including the above light conversion film of the present application can redshift the emission wavelength to above 450 nm, can effectively promote a significant increase in quantum efficiency, and enables further full utilization of sunlight, and has excellent light conversion efficiency. Of course, there can be more choices according to different needs and application scenarios. The wavelength conversion film of the present application is not limited to photovoltaic devices, agricultural films, building glass, and other fields.

[0070] The beneficial effects of the present application will be further described below in conjunction with examples and comparative examples.

[0071] Example 1

[0072] This example provides a light conversion film composition. By mass percentage, the light conversion film composition includes 98.2% of matrix resin; 0.3% of light conversion agent; 1.5% of auxiliary agent. Among them, the matrix resin is ethylene-vinyl acetate (Elvax 250 of Mitsui DuPont Co., Ltd., Japan), the light conversion agent is a compound shown in the following formula (1), and the auxiliary agent is polyvinyl alcohol (number average molecular weight is 1000, and the mass of hydroxyl groups in polyvinyl alcohol is 5% of the mass of polyvinyl alcohol).

[0073]

[0074] The synthesis route of the above formula (1) compound is as follows:

[0075]

[0076] The synthesis steps of the above compound of formula (1) are as follows: Add 1-bromopyrene (12 g, 42.68 mmol), 4-triphenylamineboronic acid (12.34 g, 42.67 mmol), potassium carbonate (12.97 g, 93.85 mmol), and tetrakis(triphenylphosphine)palladium(0) (1.43 g, 1.28 mmol) into a 500 mL round-bottom flask; add 200 mL of toluene and 50 mL of water, then evacuate and replace with nitrogen three times, and then react at 100 °C for 18 hours under nitrogen protection. After the reaction is completed, cool to room temperature, wash the reaction solution with water and extract three times with dichloromethane; dry the organic phase with anhydrous sodium sulfate and then rotary evaporate. Then recrystallize with 300 mL of a mixed solvent of EA (ethyl acetate):EtOH (ethanol) = 1:1 (mass ratio). A light green solid product of 13.87 g is obtained, and the yield is 72.9%.

[0077] Example 2

[0078] This example provides a light conversion film composition. By mass percentage, the light conversion film composition includes 98.2% of a matrix resin; 0.3% of a light conversion agent; 1.5% of an auxiliary agent. Among them, the matrix resin is ethylene-vinyl acetate (Elvax 250 from Mitsui DuPont Co., Ltd. of Japan), the light conversion agent is a compound shown in the following formula (2), and the auxiliary agent is polyvinyl alcohol (the number average molecular weight is 1000, and the mass of the hydroxyl group in polyvinyl alcohol is 5% of the mass of polyvinyl alcohol).

[0079]

[0080] The synthesis route of the above compound of formula (2) is as follows:

[0081]

[0082] Add 1,6-dibromopyrene (10 g, 27.78 mmol), 4,4'-di-tert-butyldiphenylamine (17.19 g, 61.11 mmol), tri-tert-butyltetrafluoroborate (3.54 g, 12.22 mmol), and potassium tert-butoxide (3.11 g, 27.78 mmol) into a 500 ml round-bottom flask, add 200 ml of toluene, then evacuate and replace with nitrogen three times, and then react at 100 °C for 18 hours under nitrogen protection.

[0083] After the reaction was completed, it was cooled to room temperature, washed three times with water, and then extracted three times with dichloromethane. The organic phase was dried over anhydrous magnesium sulfate and then rotary evaporated. The yellowish-brown solid obtained by rotary evaporation was recrystallized from a mixed solvent of DCM (dichloromethane):EtOH (ethanol) = 1:5 (mass ratio) to obtain 19.03 g of a yellowish-green solid with a yield of 90%.

[0084] Example 3

[0085] This example provides a light conversion film composition. By mass percentage, the light conversion film composition includes 98.2% of a matrix resin; 0.3% of a light conversion agent; and 1.5% of an auxiliary agent. Among them, the matrix resin is ethylene-vinyl acetate (Elvax 250 from Mitsui DuPont Co., Ltd. of Japan), the light conversion agent is a compound represented by the following formula (3), and the auxiliary agent is polyvinyl alcohol (number average molecular weight is 1000, and the mass of hydroxyl groups in polyvinyl alcohol is 5% of the mass of polyvinyl alcohol).

[0086]

[0087] The synthesis steps of the above formula (3) are as follows: 1,6-dibromopyrene (10 g, 27.78 mmol), 4,4'-di-tert-butyl diphenylamine (8.04 g, 28.58 mmol), tri-tert-butyl tetrafluoroborate (3.54 g, 12.22 mmol), and potassium tert-butoxide (3.11 g, 27.78 mmol) were added to a 500 mL round-bottom flask. After adding 200 ml of toluene, the mixture was evacuated and purged with nitrogen three times. Then, under the protection of nitrogen, the reaction was carried out at 100 °C for 18 hours.

[0088] After the reaction was completed, it was cooled to room temperature, washed three times with water, and then extracted three times with dichloromethane. The organic phase was dried over anhydrous magnesium sulfate and then rotary evaporated. The yellowish-brown solid obtained by rotary evaporation was purified by column chromatography. After elution with DCM (dichloromethane):PE (petroleum ether) = 1:3 and then rotary evaporation, 13.86 g of a light yellow solid was obtained with a yield of 89%.

[0089] The light yellow solid obtained in the previous step, (4-(bis(4-(tert-butyl)phenyl)amino)phenyl)boronic acid (11.15 g, 27.79 mmol), potassium carbonate (12.97 g, 93.85 mmol), and tetrakis(triphenylphosphine)palladium (1.43 g, 1.28 mmol) were added to a 500 ml round-bottom flask; after adding 200 ml of toluene and 50 mL of water, the mixture was evacuated and purged with nitrogen three times. Then, under the protection of nitrogen, the reaction was carried out at 100 °C for 18 hours. After the reaction was completed, it was cooled to room temperature, the reaction solution was washed with water and extracted three times with dichloromethane; the organic phase was dried over anhydrous sodium sulfate and then rotary evaporated. Then, it was recrystallized from a mixed solvent of DCM (dichloromethane):EtOH (ethanol) = 1:5 (mass ratio) to obtain 15.52 g of a yellow solid with a yield of 75%.

[0090] Example 4

[0091] This example provides a light conversion film composition. By mass percentage, the light conversion film composition includes 98.2% of a matrix resin; 0.3% of a light conversion agent; and 1.5% of an auxiliary agent. Among them, the matrix resin is ethylene-vinyl acetate, the light conversion agent is a compound represented by the following formula (3), and the auxiliary agent is polyvinyl alcohol (with a molecular weight of 1000, and the mass of hydroxyl groups in polyvinyl alcohol is 5% of the mass of polyvinyl alcohol).

[0092]

[0093] Add 1,6-dibromopyrene (5 g, 13.89 mmol), 4,4'-di-tert-butyl diphenylamine (4.02 g, 14.29 mmol), tri-tert-butyltetrafluoroborate (3.54 g, 12.22 mmol), and potassium tert-butoxide (1.53 g, 13.95 mmol) into a 500 mL round-bottom flask. After adding 200 mL of toluene, evacuate and replace nitrogen three times. Then, react at 100 °C for 18 hours under nitrogen protection.

[0094] After the reaction is completed, cool to room temperature, wash three times with water, and extract three times with dichloromethane. The organic phase is dried with anhydrous magnesium sulfate and then rotary evaporated. The yellowish-brown solid obtained by rotary evaporation is separated and purified by column chromatography. After eluting with DCM (dichloromethane):PE (petroleum ether) = 1:3 and then rotary evaporating, 6.97 g of a light yellow solid is obtained, with a yield of 89.6%.

[0095] Add the light yellow solid obtained in the previous step, pyrrole (3 g, 44.72 mmol), copper(I) iodide (8.5 g, 44.7 mmol), potassium tert-butoxide (5.5 g, 49.17 mmol), and tri-tert-butylphosphine tetrafluoroborate (3.24 g, 0.0112 mmol) into a 500 ml round-bottom flask. After adding 200 ml of toluene, evacuate and replace nitrogen three times. Then, react at 100 °C for 18 hours under nitrogen protection. After the reaction is completed, cool to room temperature, wash the reaction solution with water, and extract three times with dichloromethane; the organic phase is dried with anhydrous sodium sulfate and then rotary evaporated. Then, recrystallize with a mixed solvent of DCM (dichloromethane):EtOH (ethanol) = 1:5 (mass ratio) to obtain a yellow solid, and then elute with a ratio of DCM (dichloromethane):PE (petroleum ether) = 1:1 and rotary evaporate to obtain 3.53 g of a yellow solid, with a yield of 51.8%.

[0096] Example 5

[0097] This example provides a light conversion adhesive film composition. By mass percentage, the light conversion adhesive film composition includes 98.2% of a matrix resin; 0.3% of a light conversion agent; and 1.5% of an auxiliary agent. Among them, the matrix resin is ethylene-vinyl acetate, the light conversion agent is a compound represented by the following formula (3), and the auxiliary agent is polyvinyl alcohol (with a molecular weight of 1000, and the mass of hydroxyl groups in polyvinyl alcohol is 5% of the mass of polyvinyl alcohol).

[0098]

[0099] Add 1,6-dibromopyrene (5 g, 13.89 mmol), 4,4'-di-tert-butyl diphenylamine (4.02 g, 14.29 mmol), tri-tert-butyl borate tetrafluoride (3.54 g, 12.22 mmol), and potassium tert-butoxide (1.53 g, 13.95 mmol) into a 500 ml round-bottom flask. After adding 200 mL of toluene, evacuate and replace nitrogen three times. Then, react at 100 °C for 18 hours under nitrogen protection.

[0100] After the reaction is completed, cool to room temperature, wash three times with water, and extract three times with dichloromethane. The organic phase is dried with anhydrous magnesium sulfate and then rotary evaporated. The obtained yellowish-brown solid is purified by column chromatography. After eluting with DCM (dichloromethane):PE (petroleum ether) = 1:3 and then rotary evaporating, 6.97 g of a light yellow solid is obtained, with a yield of 89.6%.

[0101] Add the above-obtained yellow solid, 2-furanboronic acid (1.35 g, 12.36 mmol), potassium carbonate (6.49 g, 46.92 mmol), tetrakis(triphenylphosphine)palladium (1.43 g, 1.28 mmol), 200 mL of toluene, and 50 mL of water. Evacuate and replace nitrogen three times. Then, react at 100 °C for 18 hours under nitrogen protection. After the reaction is completed, cool to room temperature, wash the reaction solution with water, and extract three times with dichloromethane. The organic phase is dried with anhydrous sodium sulfate and then rotary evaporated. Column chromatography is carried out with DCM (dichloromethane):PE (petroleum ether) = 1:1 to obtain 5.75 g of a yellow solid product, with a yield of 85.1%.

[0102] Example 6

[0103] Based on Example 1, keep the types of the light conversion agent, the auxiliary agent, and the matrix resin unchanged. Change the formulation to 97.9% of the matrix resin, 0.6% of the light conversion agent, and 1.5% of the auxiliary agent.

[0104] Example 7

[0105] Based on Example 2, keep the types of the light conversion agent, the auxiliary agent, and the matrix resin unchanged. Change the formulation to 97.9% of the matrix resin, 0.6% of the light conversion agent, and 1.5% of the auxiliary agent.

[0106] Example 8

[0107] Based on Example 3, keep the types of the light conversion agent, the auxiliary agent, and the matrix resin unchanged. Change the formulation to 97.9% of the matrix resin, 0.6% of the light conversion agent, and 1.5% of the auxiliary agent.

[0108] Example 9

[0109] Based on Example 4, keep the types of the light conversion agent, the auxiliary agent, and the matrix resin unchanged. Change the formulation to 97.9% of the matrix resin, 0.6% of the light conversion agent, and 1.5% of the auxiliary agent.

[0110] Example 10

[0111] Based on Example 5, keep the types of the light conversion agent, the auxiliary agent, and the matrix resin unchanged. Change the formulation to 97.9% of the matrix resin, 0.6% of the light conversion agent, and 1.5% of the auxiliary agent.

[0112] Example 11

[0113] Based on Example 1, keep the types of the light conversion agent, the auxiliary agent, and the matrix resin unchanged. Change the formulation to 80% of the matrix resin, 10% of the light conversion agent, and 10% of the auxiliary agent.

[0114] Example 12

[0115] Based on Example 2, keep the types of the light conversion agent, the auxiliary agent, and the matrix resin unchanged. Change the formulation to 80% of the matrix resin, 10% of the light conversion agent, and 10% of the auxiliary agent.

[0116] Example 13

[0117] Based on Example 3, keep the types of the light conversion agent, the auxiliary agent, and the matrix resin unchanged. Change the formulation to 80% of the matrix resin, 10% of the light conversion agent, and 10% of the auxiliary agent.

[0118] Example 14

[0119] Based on Example 1, keep the types of the light conversion agent, the auxiliary agent, and the matrix resin unchanged. Change the formulation to 80% of the matrix resin, 10% of the light conversion agent, and 10% of the auxiliary agent.

[0120] Example 15

[0121] Based on Example 1, keep the types of the light conversion agent, the auxiliary agent, and the matrix resin unchanged. Change the formulation to 80% of the matrix resin, 10% of the light conversion agent, and 10% of the auxiliary agent.

[0122] Example 16

[0123] The difference from Example 1 is that the mass of the hydroxyl groups in polyvinyl alcohol is 10% of the mass of polyvinyl alcohol, and a light conversion film is finally obtained.

[0124] Example 17

[0125] The difference from Example 1 is that the mass of the hydroxyl groups in polyvinyl alcohol is 0.1% of the mass of polyvinyl alcohol, and a light conversion film is finally obtained.

[0126] Example 18

[0127] The difference from Example 1 is that the mass of the hydroxyl groups in polyvinyl alcohol is 20% of the mass of polyvinyl alcohol, and a light conversion film is finally obtained.

[0128] Example 19

[0129] The difference from Example 1 is that polyvinyl alcohol is replaced by polyethylene glycol, and a light conversion film is finally obtained.

[0130] Example 20

[0131] The difference from Example 16 is that the mass of ethylene-vinyl acetate remains unchanged, the auxiliary agent further includes polyethylene terephthalate, and the mass ratio of polyvinyl alcohol to polyethylene terephthalate is 1:0.01, and a light conversion film is finally obtained.

[0132] Example 21

[0133] The difference from Example 16 is that the mass of ethylene-vinyl acetate remains unchanged, the auxiliary agent further includes polyethylene terephthalate, and the mass ratio of polyvinyl alcohol to polyethylene terephthalate is 1:0.5, and a light conversion film is finally obtained.

[0134] Example 22

[0135] The difference from Example 16 is that polyvinyl alcohol is replaced by polyurethane, and a light conversion film is finally obtained.

[0136] Example 23

[0137] The difference from Example 16 is that, by weight, the matrix resin is ethylene-1-octene, and a light conversion film is finally obtained.

[0138] Example 24

[0139] The difference from Example 1 is that, based on the total mass of the matrix resin, the light conversion agent and the auxiliary agent being 100%, the light conversion film composition further includes 1% of dicumyl peroxide crosslinking agent, and a light conversion film is finally obtained.

[0140] Example 25

[0141] The difference from Example 1 is that based on the total mass of the matrix resin, light conversion agent and additives being 100%, the light conversion film composition further includes 0.01% of dicumyl peroxide crosslinking agent, and finally a light conversion film is obtained.

[0142] Example 26

[0143] The difference from Example 1 is that based on the total mass of the matrix resin, light conversion agent and additives being 100%, the light conversion film composition further includes 0.5% of dicumyl peroxide crosslinking agent, and finally a light conversion film is obtained.

[0144] Example 27

[0145] The difference from Example 21 is that the crosslinking agent is tert-butyl 2-ethylhexyl percarbonate crosslinking agent, and finally a light conversion film is obtained.

[0146] Comparative Example 1

[0147] This comparative example provides a film composition, the difference from Example 1 being that the light conversion agent is the following compound:

[0148]

[0149] Comparative Example 2

[0150] This comparative example provides a film composition, the difference from Example 1 being that the light conversion agent is the following compound:

[0151]

[0152] Comparative Example 3

[0153] This comparative example provides a film compound, the difference from Example 1 being that the light conversion agent is the following compound:

[0154]

[0155] Comparative Example 4

[0156] The difference from Comparative Example 1 is that the types of the light conversion agent, additives and matrix resin are kept unchanged. The formulation is changed to 97.9% matrix resin, 0.6% light conversion agent, 1.5% additives.

[0157] Comparative Example 5

[0158] The difference from Comparative Example 2 is that the types of the light conversion agent, additives and matrix resin are kept unchanged. The formulation is changed to 97.9% matrix resin, 0.6% light conversion agent, 1.5% additives.

[0159] Comparative Example 6

[0160] The difference from Comparative Example 3 lies in that the types of the photoluminescent agent, the types of the additives, and the type of the matrix resin are kept unchanged. The formulation is changed to 97.9% of the matrix resin, 0.6% of the photoluminescent agent, and 1.5% of the additives.

[0161] Test Example

[0162] The above-mentioned photoluminescent film compositions provided in the examples and comparative examples were respectively prepared into photoluminescent films by mixing and molding, and then the photoluminescence efficiency, the yellowness index before and after the aging test, and the aging migration rate of the photoluminescent films were measured. The results are shown in Table 1 below. The preparation method of the photoluminescent film is as follows: the above-mentioned photoluminescent agent is dissolved in a solvent (methylene chloride) for standby. After the photoluminescent film composition is dissolved therein and mixed evenly, it is melt-extruded into a film at 100 °C to obtain a photoluminescent film.

[0163] Among them, (1) Photoluminescence efficiency: Horiba spectrometer FL-3, and the absolute quantum efficiency test is carried out using an integrating sphere at room temperature.

[0164] (2) Yellowness index before and after the aging test: The upper and lower surfaces of the photoluminescent film are respectively laminated with glass layers to obtain a pre-pressed assembly, and UV300 aging test is carried out in a multi-fold ultraviolet aging chamber (power 142W, temperature 70 °C). Yellowness index: The yellowness index (ΔYI) of the pre-pressed assembly before and after the aging test is measured according to the national standard GB 2409 "Test Method for Plastics Yellow Index".

[0165] (3) Aging migration rate: A rapid aging migration test is carried out at the photovoltaic module end. The front of the photovoltaic module is a wavelength conversion film doped with a photoluminescent agent, and the back of the module is a blank film without a photoluminescent agent (only the photoluminescent agent is a variable). After the module undergoes a UV300 aging experiment in an aging chamber, the film on the front of the module is removed and heated and soaked with an organic solvent (methanol) (stirred, heated and soaked at 60 °C for 24H). HPLC analysis is carried out on the soaked solution to obtain the content (A) of Example 1. The film on the front of the un-aged module is removed, and the same heating and soaking treatment is carried out, and HPLC analysis is carried out on the soaked solution to obtain another content (B) of Example 1. The migration rate is: A / B * 100%.

[0166] Table 1

[0167]

[0168]

[0169] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0170] Applying the technical solution of the present application, the present application utilizes the characteristics of a large pyrene-based conjugated system, energy level synthesis, and many active sites in pyrene-based compounds, and uses pyrene-based compounds with the structure of formula (A) and / or formula (B) as photoluminescent agents in the film composition. Utilizing the excellent optoelectronic properties of the pyrene group, by introducing an electron-donating group, good absorption and emission wavelengths are achieved, and at the same time, a high quantum efficiency is achieved. Among them, the pyrene-based photoluminescent agent with the structure of formula (A) can be used as a blue-light photoluminescent material, with an absorption wavelength of about 360 nm, an emission at about 470 nm, and a quantum efficiency of about 80%; the pyrene-based photoluminescent agent with the structure of formula (B) can be used as a green-light photoluminescent material, with an absorption wavelength of about 400 nm, an emission at about 500 nm, and a quantum efficiency of about 85%. Using at least one of the two structures of pyrene-based compounds as a photoluminescent agent in the photoluminescent film composition, the emission wavelength is redshifted compared with the prior art, both above 450 nm, which can effectively promote a significant increase in the quantum efficiency and make further full use of sunlight, thus meeting the needs of HJT batteries.

[0171] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A light conversion film composition, characterized in that, In terms of mass percentage, the light conversion film composition comprises: 80 - 99.98% of a matrix resin; 0.01 - 10% of a light conversion agent; and 0.01 - 10% of an auxiliary agent; wherein, the light conversion agent is a pyrene compound, and the pyrene compound is selected from the structures shown in the following formula (A) and / or formula (B): Wherein, R1 is a substituted or unsubstituted first group, and the first group is selected from C6-C20 aryl, C4-C20 heteroaryl, or R a -N(R b )*, and R a and R b are each independently selected from C6-C20 aryl, C4-C20 heteroaryl; R2, R A , R B and R C each independently represents H, a substituted or unsubstituted second group selected from C1-C20 alkyl, C3-C20 cycloalkyl, C1-C20 heterocycloalkyl, C2-C20 alkenyl, C6-C20 aryl, C4-C20 heteroaryl, C1-C10 alkyl C6-C20 aryl, C1-C10 alkoxy C6-C20 aryl, C6-C20 aryloxy or R a -N(R b )*, and R a and R b are each independently selected from C6-C20 aryl, C4-C20 heteroaryl; m, p, and q are each independently a natural number between 1 and 5; n and w are each independently a natural number between 1 and 9; The maximum absorption wavelength of the light conversion agent is located at 350 - 420 nm, and the maximum emission wavelength is greater than 450 nm.

2. The light conversion adhesive film composition according to claim 1, wherein The first group is selected from C6-C10 aryl, C4-C10 heteroaryl or R a -N(R b ), and R a and R b are each independently selected from C6-C10 aryl, C4-C10 heteroaryl; And / or, the second group is selected from C1-C10 alkyl, C3-C10 cycloalkyl, C1-C10 heterocycloalkyl, C2-C10 alkenyl, C6-C10 aryl, C4-C10 heteroaryl, C1-C10 alkyl C6-C10 aryl, C1-C10 alkoxy C6-C10 aryl, C6-C10 aryloxy or R a -N(R b )*, and R a and R b are each independently selected from C6-C10 aryl, C4-C10 heteroaryl.

3. The light-converting adhesive film composition according to Claim 1, wherein, The first group is selected from phenyl, biphenyl, phenyl-N(phenyl)*, pyridyl, pyrazolyl, imidazolyl, thiazolyl, furyl, thienyl, pyrimidinyl, pyrazinyl; and / or, the second group is selected from cyclopentyl, cyclohexyl, vinyl, propenyl, butenyl, phenyl, methylphenyl, ethylphenyl, biphenyl, methoxyaryl, ethoxyaryl, diphenylamino, pyridyl, pyrazolyl, imidazolyl, thiazolyl, furyl, thienyl, pyrimidinyl, pyrazinyl.

4. The conversion light film composition according to claim 1, wherein The light conversion agent is selected from at least one of the compounds of the following formula (a) and / or formula (b): wherein, R1 is selected from phenyl, biphenyl, diphenylamino; R2 is selected from H, vinyl, propenyl, butenyl, methoxyphenyl, ethoxyphenyl, cyclohexyl, phenyl, isopropylphenyl, methylphenyl, ethylphenyl; R A 、R B are each independently selected from H, vinyl, propenyl, butenyl, phenyl, dimethyldiphenylamino, diethyldiphenylamino, di-tert-butyldiphenylamino; R c Each independently selected from H, vinyl, propenyl, butenyl, phenyl, isopropylphenyl, methylphenyl, ethylphenyl, dimethyldiphenylamino, diethyldiphenylamino, ditert-butyldiphenylamino.

5. The light conversion adhesive film composition according to claim 1, wherein, The light conversion agent is selected from at least one of the following compounds:

6. The light conversion adhesive film composition according to any one of claims 1 to 5, characterized in that, The auxiliary agent includes a crosslinking agent and / or a co-crosslinking agent; Preferably, the mass content of the crosslinking agent is 0.005 - 5%; Preferably, the mass content of the co-crosslinking agent is 0.005 - 5%.

7. The light conversion adhesive film composition according to any one of claims 1 to 6, characterized in that, The auxiliary agent also includes a tackifier; the tackifier includes at least one selected from the group consisting of γ-aminopropyltriethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, vinyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, γ-glycidyletheroxypropyltrimethylsilane, 3-aminopropyltrimethylsilane; and / or, the auxiliary agent also includes a polyol compound and / or a polyester compound; preferably, the mass of the hydroxyl group in the polyol compound is 0.1 - 20% of the mass of the polyol compound, preferably 0.5 - 10%, preferably the molecular weight of the polyol compound is 500 - 80000, preferably the polyol compound is selected from any one or more of polyvinyl alcohol compounds, polyethylene glycol, and polypropylene glycol; preferably, the polyester compound mainly includes polyester-based polyurethane and polyester polyol; preferably at least one of polyethylene terephthalate and polyurethane.

8. The light conversion adhesive film composition according to any one of claims 1 to 7, characterized in that The matrix resin is selected from at least one of EVA resin, POE resin, PVB resin, ethylene-acrylate resin, ethylene-methacrylate resin, and liquid silicone.

9. A light conversion film is prepared by mixing and molding a film composition, and is characterized in that The film composition is the light conversion film composition according to any one of claims 1 to 8.

10. A photovoltaic module, characterized in that, It includes the light conversion film according to claim 9.

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