Light conversion film for effectively protecting light conversion agent and application thereof

Abstract

The application relates to the technical field of photovoltaics, and specifically discloses a light conversion film capable of effectively protecting a light conversion agent and application thereof. The light conversion film is an EPE structure, that is, the light conversion film comprises two EVA layers and a POE layer arranged between the two EVA layers; raw materials for preparing the POE layer do not contain a peroxide crosslinking agent, and the raw materials for preparing the POE layer comprise a light conversion agent; raw materials for preparing the EVA layer comprise a peroxide crosslinking agent and do not comprise a light conversion agent; the light conversion film can be used for preparing a photovoltaic module, and has the advantages that the initial module power of the photovoltaic module is high, and the power attenuation of the module under long-term UV irradiation is small.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaics, more particularly, it relates to a light conversion film for effectively protecting a light conversion agent and application thereof. BACKGROUND

[0002] With the rapid development of the photovoltaic industry, market demand gradually expands, and the performance requirements of photovoltaic modules are also increasingly high. In the field of solar cell sheets, HJT cell sheets are not resistant to UV light and have weak spectral response to the ultraviolet waveband, so UV light conversion adhesive film is needed to protect the cell sheets and convert the weak spectral response of the ultraviolet waveband of the module into the visible light waveband with high spectral response, thereby improving the utilization rate of HJT to sunlight.

[0003] The current light conversion film is prepared from raw materials including the following components: a base resin, a peroxide crosslinking agent, an additive, and a light conversion agent. The light conversion agent is divided into inorganic light conversion agents, inorganic light conversion agents with organic ligands, and organic light conversion agents. The inorganic light conversion agent has poor compatibility with the base resin, has the problem of not being easy to disperse, and has low light conversion efficiency. Therefore, the use of organic light conversion agents and inorganic light conversion agents with organic ligands is more widespread.

[0004] A light conversion POE adhesive film in the related art uses POE as a resin base and cooperates with an organic peroxide initiator, a crosslinking aid, an adhesion coupling agent, a light stabilizer, and a light conversion agent, etc., has the function of converting ultraviolet light into blue light, and solves the defect that HJT photovoltaic modules have low response to the ultraviolet waveband.

[0005] However, the current organic light conversion agent and inorganic light conversion agent with organic ligands still have the disadvantage that the coordination structure is easily destroyed, which weakens the light conversion efficiency of the light conversion agent, and further affects the initial module power and the stability of the continuous work of the photovoltaic module. SUMMARY

[0006] In order to reduce the possibility of destroying the coordination structure of the light conversion agent and further improve the light conversion efficiency of the light conversion agent and the initial module power of the photovoltaic module, the present application provides a light conversion film for effectively protecting a light conversion agent and application thereof.

[0007] In a first aspect, the present application provides a light conversion film for effectively protecting a light conversion agent, which adopts the following technical solution:

[0008] A light conversion film for effectively protecting a light conversion agent, the light conversion film is an EPE structure, that is, it includes two EVA layers and a POE layer sandwiched between the two EVA layers; the raw materials for preparing the POE layer do not contain a peroxide crosslinking agent, and the raw materials for preparing the POE layer include a light conversion agent; the raw materials for preparing the EVA layer include a peroxide crosslinking agent and do not include a light conversion agent.

[0009] Generally, in order to enable the light conversion film to meet the adhesion used in photovoltaic standards, a crosslinking agent needs to be added in the raw material for preparing the light conversion film, and therefore in the related art, the light conversion agent (i.e. organic light conversion agent or inorganic light conversion agent with organic ligand) and peroxide crosslinking agent are directly added together and then used. However, the organic light conversion agent or inorganic light conversion agent with organic ligand has the problem of low stability due to the easy destruction of the coordination structure. The applicant finds that not only ultraviolet light has an influence on the stability of the light conversion agent, but also the free radicals generated in the process of the peroxide crosslinking agent playing its crosslinking role can destroy the coordination structure of the organic light conversion agent or inorganic light conversion agent with organic ligand, thereby reducing the fluorescence quantum efficiency of the organic light conversion agent or inorganic light conversion agent with organic ligand, i.e. the light conversion efficiency of the light conversion agent is low, and thus the initial module power of the photovoltaic module is reduced.

[0010] By adopting the technical solution, in the process of setting the EPE structure of the light conversion film, the POE layer contains the light conversion agent but does not contain the peroxide crosslinking agent in the raw material, and the EVA layer contains the peroxide crosslinking agent but does not contain the light conversion agent in the raw material. The advantages of such a setting are as follows: firstly, the POE layer contains the light conversion agent, so the light conversion film has its basic light conversion performance; secondly, the peroxide crosslinking agent is set in the EVA layer on both sides of the POE layer, which can also meet the basic adhesion requirement of the light conversion film; and more importantly, on the basis of not affecting the light conversion performance and adhesion performance of the light conversion film, the peroxide crosslinking agent and the light conversion agent of the light conversion film exist in different layers respectively, so the peroxide crosslinking agent does not affect the light conversion performance of the light conversion agent, thereby enabling the light conversion agent to play a more excellent light conversion role, making the light conversion efficiency of the light conversion film higher, and further improving the initial module power of the photovoltaic module prepared by the light conversion film.

[0011] Optionally, the EVA layer contains the following raw materials by weight based on the weight of the EVA layer: 100 parts of EVA resin, 0.1-3 parts of peroxide crosslinking agent, 0.1-5 parts of coupling agent for the EVA layer, and 0-1 part of anti-aging agent for the EVA layer.

[0012] By adopting the technical solution, in the present application, the EVA layer is the layer directly bonded to other substrates (such as glass or battery pieces) of the light conversion film, and therefore contains the peroxide crosslinking agent in its components to meet the adhesion performance of the light conversion film. The POE film is sandwiched between the EVA layers, so the internal layer structure of the EPE structure light conversion film can be stably bonded. In addition, in the case that the POE layer does not contain the peroxide crosslinking agent, the above-mentioned amount of peroxide crosslinking agent can make the light conversion film have excellent bonding stability.

[0013] Optionally, the EVA layer further comprises 0.1-2 parts of a co-crosslinking agent, based on the weight of the EVA layer.

[0014] Optionally, the EVA layer has a thickness of 160-200 μm.

[0015] Optionally, the POE layer comprises the following raw materials by weight: 100 parts of POE resin, 0.01-5 parts of light conversion agent, 0.1-2 parts of POE layer coupling agent, and 0-1 parts of POE layer anti-aging agent.

[0016] By using the above technical solution, the POE layer contains a light conversion agent but does not contain a peroxide crosslinking agent, thus effectively avoiding the destruction of the light conversion agent coordination structure by the peroxide crosslinking agent, thereby ensuring that the light conversion film has higher light conversion efficiency. In addition, for the light conversion film, the light conversion agent is only added to the POE layer, which reduces the amount of light conversion agent used in the preparation of the light conversion film as a whole, thereby reducing the production cost of the light conversion film. In addition, the addition of the POE layer coupling agent can further solve the problem of reduced adhesion between the POE layer and the EVA layer caused by the absence of a crosslinking agent in the raw materials for the preparation of the POE layer.

[0017] Optionally, the POE layer coupling agent is selected from any one or more of an alkyl vinyl silane coupling agent and an amino hydrocarbon silane coupling agent.

[0018] Optionally, the POE resin has a melting point of 70-120℃ and a melt index of 0.8-10.

[0019] By using the above technical solution, since the POE layer does not contain a peroxide crosslinking agent in the preparation of the raw materials, i.e., the components in the layer do not undergo crosslinking reactions, the uncrosslinked POE layer is prone to overflow during lamination; therefore, a POE resin with a low melt index and a high melting point is selected here to ensure that the EPE structure does not overflow during lamination.

[0020] Optionally, the raw materials of the POE layer further comprise LDPE, and the weight ratio of the LDPE to the POE resin is 1:(2.5-10.5).

[0021] Here, LDPE refers to low-density polyethylene.

[0022] By using the above technical solution, since the POE layer does not contain a peroxide crosslinking agent in the preparation of the raw materials, i.e., the components in the layer do not undergo crosslinking reactions, the uncrosslinked POE layer is prone to overflow during lamination; therefore, the addition of LDPE can ensure that the EPE structure does not overflow during lamination.

[0023] Optionally, the light conversion agent is an organic light conversion agent or an inorganic light conversion agent with organic ligands.

[0024] By using the above technical solution, the light conversion agent is an organic light conversion agent or an inorganic light conversion agent with organic ligands, rather than an inorganic light conversion agent. First, compared with the organic light conversion agent or the inorganic light conversion agent with organic ligands, the pure inorganic light conversion agent is a solid powder, and has low compatibility with the organic phase. In the dispersion process, it is difficult to disperse uniformly, and the problem of uneven dispersion will directly affect the light conversion effect of the light conversion film. Therefore, the organic light conversion agent or the inorganic light conversion agent with organic ligands selected by the present application has better compatibility with the high molecular resin, and can protect the structural integrity of the light conversion agent when the peroxide crosslinking agent and the light conversion agent are used separately.

[0025] Optionally, the peroxide crosslinking agent is selected from any one or more of tert-butyl hydroperoxide, tert-butyl peroxy-2-ethylhexyl carbonate, tert-amyl peroxy-2-ethylhexyl carbonate, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, tert-butyl peroxy-3,5,5-trimethylhexanoate, di(4-methylbenzoyl)peroxide, dibenzoyl peroxide, 1,1-di-tert-butylperoxy cyclohexane, tert-butylperoxy-2-ethylhexyl carbonate, n-butyl-4,4-di(tert-butylperoxy)valerate, dicumyl peroxide, α,α'-bis(tert-butylperoxy)-1,3-diisopropylbenzene, and 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane.

[0026] Optionally, the co-crosslinking agent is selected from any one or more of triallyl isocyanurate, triallyl cyanurate, and an acrylic co-crosslinking agent.

[0027] Optionally, the acrylic co-crosslinking agent is selected from any one or more of trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, propoxylated glycerol triacrylate, and ethoxylated pentaerythritol tetraacrylate.

[0028] Optionally, the coupling agent for the POE layer or the coupling agent for the EVA layer is selected from any one or more of a vinyl silane coupling agent, a chlorohydrocarbyl silane coupling agent, an aminohydrocarbyl silane coupling agent, an epoxyhydrocarbyl silane coupling agent, an acrylate silane coupling agent, a methacryloyloxyalkyl silane coupling agent, a sulfur-containing hydrocarbyl silane coupling agent, a pseudohalogen silane coupling agent, or a quaternary aminohydrocarbyl silane coupling agent.

[0029] The vinyl-based silane coupling agent can be vinyl triethoxysilane, vinyl trimethoxysilane, vinyl triacetoxysilane, vinyl tri(β-methoxyethoxy)silane, vinyl tri-tert-butylperoxysilane, or vinyl trichlorosilane, etc. The chloro-hydrocarbon-based silane coupling agent can be chloropropyl methyl dimethoxysilane, chloropropyl methyl diethoxysilane, chloropropyl methyl trimethoxysilane, chloropropyl methyl triethoxysilane, chloropropyl methyl dichlorosilane, chloropropyl trichlorosilane, chloromethyl triethoxysilane, or chloropropyl trimethoxysilane, etc. The amino-hydrocarbon-based silane coupling agent can be aminopropyl triethoxysilane, aminopropyl trimethoxysilane, or anilinomethyl trimethoxysilane, etc. The epoxy-hydrocarbon-based silane coupling agent can be γ-(2,3-epoxypropoxy)propyl trimethoxysilane, γ-(2,3-epoxypropoxy)propyl triethoxysilane, or γ-(β-aminoethyl)aminopropyl trimethoxysilane, etc. The methacryloxyalkyl-based silane coupling agent can be γ-methacryloxypropyl trichlorosilane, γ-methacryloxypropyl trimethoxysilane, γ-methacryloxypropyl methyl diethoxysilane, or γ-methacryloxypropyl methyl dimethoxysilane, etc.

[0030] Optionally, the coupling agent for the POE layer or the coupling agent for the EVA layer can be selected from one or more of KH-560 silane coupling agent, KH-550 silane coupling agent, KH-580 silane coupling agent, KH-590 silane coupling agent, A-186 silane coupling agent, and A-1160 silane coupling agent.

[0031] Optionally, the anti-aging agent is selected from any one or both of a light stabilizer and an antioxidant.

[0032] Optionally, the light stabilizer is selected from any one or more of bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, poly(1-hydroxyethyl-2,2,6,6-tetramethyl-4-hydroxypiperidine) butanedioate, 2-hydroxy-4-n-octyloxybenzophenone, 3,5-di-tert-butyl-4-hydroxy-benzene- propionic acid hexadecyl ester, N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)-1,6-hexanediamine, and tris(1,2,2,6,6-pentamethyl-4-piperidyl) phosphite. The antioxidant is selected from any one or more of a hindered phenol antioxidant, an aromatic amine antioxidant, a phosphite antioxidant, a thioether antioxidant, and a metal deactivator antioxidant.

[0033] Optionally, the thickness of the POE layer is 100-180 μm.

[0034] Optionally, the method for preparing the light conversion film comprises the following steps:

[0035] Preparation of raw materials for two layers of EVA layer, preparation of raw materials for middle layer POE layer, three layers of co-extrusion, preparation of EPE structure light conversion film.

[0036] Optionally, the thickness of the light conversion film is 420-580 μm.

[0037] In the second aspect, the application provides an application of the above light conversion film, and the following technical scheme is adopted:

[0038] An application of the above light conversion film, the light conversion film is used for preparation of photovoltaic module.

[0039] The photovoltaic module prepared by the above light conversion film has higher initial power of the photovoltaic module and higher power of the photovoltaic module after long-term UV irradiation.

[0040] In summary, the application has the following beneficial effects:

[0041] 1. The applicant finds that peroxide crosslinking agent can destroy the coordination structure of organic light conversion agent or inorganic light conversion agent with organic ligand, thereby reducing the light conversion efficiency of the light conversion agent, and further reducing the initial module power of the photovoltaic module; therefore, the applicant sets a light conversion film with EPE structure, the EVA layer of which contains peroxide crosslinking agent but does not contain light conversion agent, and the POE layer of which contains light conversion agent but does not contain peroxide crosslinking agent, that is, the light conversion agent and the peroxide crosslinking agent are not in the same layer structure, thereby avoiding the influence of the peroxide crosslinking agent on the light conversion agent, maintaining the structural integrity of the light conversion agent, and improving the initial power of the photovoltaic module prepared by the light conversion film.

[0042] 2. The light conversion film of the application only contains light conversion agent in the POE layer, thereby saving production cost. DETAILED DESCRIPTION

[0043] The application will be further described in detail below in combination with examples.

[0044] Examples

[0045] The following examples only provide an exemplary embodiment and do not limit the protection scope of the application. The melting point of the POE resin in the following examples is 70-120℃, and the melt index is 0.8-10.

[0046] Example 1

[0047] A light conversion film for effectively protecting light conversion agent, the preparation raw materials of which are:

[0048] The raw materials of the EVA layer close to the glass side: EVA resin 50 kg, tert-butyl peroxy-2-ethylhexyl carbonate 0.05 kg, KH-560 silane coupling agent 0.3 kg; the raw materials of the EVA layer close to the battery piece side: EVA resin 50 kg, tert-butyl peroxy-2-ethylhexyl carbonate 0.05 kg, KH-560 silane coupling agent 0.5 kg.

[0049] The raw materials of the POE layer: POE resin 50 kg, UVR365 (purchased from Shanghai Huxiu Industry Co., Ltd., organic heterocyclic light conversion agent, red light emitting) 0.005 kg, KH-580 silane coupling agent 0.05 kg.

[0050] The preparation method of the light conversion film, the steps are: preparing the raw materials of the two EVA layers and preparing the raw materials of the middle layer POE layer according to the above, three-layer co-extrusion to obtain the light conversion film with EPE structure. In the EPE structure of the light conversion film, the thickness of the EVA layer close to the glass side is 160 μm, the thickness of the EVA layer close to the battery piece side is 160 μm, the thickness of the POE layer is 100 μm, and the total thickness of the light conversion film is 420 μm.

[0051] Example 2

[0052] A light conversion film for effectively protecting light conversion agents, the preparation raw materials of which are:

[0053] The raw materials of the EVA layer close to the glass side and the EVA layer close to the battery piece side are the same, specifically: EVA resin 50 kg, tert-butyl peroxy-3,5,5-trimethylhexanoate 1 kg, trimethylolpropane triacrylate 0.8 kg, A-186 silane coupling agent 1.5 kg, bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate 0.15 kg, antioxidant 425 0.15 kg.

[0054] The raw materials of the POE layer: POE resin 50 kg, UVG365 (purchased from Shanghai Huxiu Industry Co., Ltd., organic heterocyclic light conversion agent, green light emitting) 1.5 kg, KH-550 silane coupling agent 0.5 kg, poly(1-hydroxyethyl-2,2,6,6-tetramethyl-4-hydroxypiperidine) butanedioate 0.15 kg, antioxidant 1098 0.15 kg.

[0055] The preparation method of the light conversion film, the steps are: preparing the raw materials of the two EVA layers and preparing the raw materials of the middle layer POE layer according to the above, three-layer co-extrusion to obtain the light conversion film with EPE structure. In the EPE structure of the light conversion film, the thickness of the EVA layer close to the glass side is 190 μm, the thickness of the EVA layer close to the battery piece side is 175 μm, the thickness of the POE layer is 160 μm, and the total thickness of the light conversion film is 525 μm.

[0056] Example 3

[0057] A light conversion film for effectively protecting a light conversion agent, which is prepared from the following raw materials:

[0058] The raw materials for the EVA layer close to the glass side and the EVA layer close to the cell side are the same, specifically: EVA resin 50 kg, 1,1-di-tert-butyl peroxide cyclohexane 1.5 kg, A-1160 silane coupling agent 2.5 kg, antioxidant 5057 0.25 kg.

[0059] The raw materials for the POE layer: POE resin 50 kg, UVB365 (purchased from Shanghai Huxiu Industry Co., Ltd., organic heterocyclic light conversion agent, emitting blue light) 2.5 kg, A-1160 silane coupling agent 1 kg, tris(1,2,2,6,6-pentamethyl-4-piperidyl) phosphite 0.25 kg, antioxidant 1098 0.25 kg.

[0060] The preparation method of the light conversion film, the steps are: preparing the raw materials for the two EVA layers and the raw materials for the middle layer POE layer according to the above, and preparing the light conversion film with EPE structure by three-layer co-extrusion. In the EPE structure of the light conversion film, the thickness of the EVA layer close to the glass side is 200 μm, the thickness of the EVA layer close to the cell side is 200 μm, and the thickness of the POE layer is 180 μm. The total thickness of the light conversion film is 580 μm.

[0061] Example 4

[0062] The difference between this embodiment and Example 2 is that in this embodiment, when preparing the POE layer, the raw materials further include 17 kg of LDPE, i.e. the raw materials for the POE layer are: POE resin 50 kg, UVG365 (purchased from Shanghai Huxiu Industry Co., Ltd., organic heterocyclic light conversion agent, emitting green light) 1.5 kg, KH-550 silane coupling agent 0.5 kg, poly(1-hydroxyethyl-2,2,6,6-tetramethyl-4-hydroxypiperidine) succinate 0.15 kg, antioxidant 1098 0.15 kg, LDPE 17 kg. The others are the same as Example 2.

[0063] Example 5

[0064] The difference between this example and Example 4 is that in this example, the raw material of the EVA layer close to the glass side further comprises an ultraviolet absorber MISORB UV-0 (BP1) 0.05 kg, that is, the raw material of the EVA layer close to the glass side is: EVA resin 50 kg, peroxide-3,5,5-trimethylhexanoic acid tert-butyl ester 1 kg, trimethylolpropane triacrylate 0.8 kg, A-186 silane coupling agent 1.5 kg, bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate 0.15 kg, antioxidant 425 0.15 kg, ultraviolet absorber MISORB UV-0 (BP1) 0.05 kg.

[0065] In addition, the light conversion agent is an inorganic light conversion agent with an organic ligand, and is further a red light conversion agent based on a rare earth europium complex, specifically [Eu(2-HBI)(phen)3]Cl3, and the preparation method is as follows: 0.537 g (4 mmol, 134.14 g / mol) of 2-hydroxybenzimidazole is weighed and dissolved in 10 mL of anhydrous ethanol, and then added to a 100 mL three-necked flask, and then 1.033 g (4 mmol, 258.41 g / mol) of EuCl3 is dissolved in 15 mL of ethanol solution, and then added dropwise under magnetic stirring, and then refluxed for 2 h; 2.162 g (12 mmol, 180.21 g / mol) of phenanthroline (anhydrous) is weighed and dissolved in 15 mL of anhydrous ethanol, and then added dropwise to the above three-necked flask, and then after the dropwise addition is completed, refluxing is continued for 5 h, and then the precipitate is precipitated after cooling and standing, and then filtered, and then the crude product is recrystallized with anhydrous ethanol, and then vacuum dried to obtain a powder product.

[0066] The other is the same as Example 4.

[0067] Comparative Example

[0068] Comparative Example 1

[0069] The difference between this comparative example and Example 2 is that the raw material of the two EVA layers of this comparative example both contains UVG 365 1.5 kg, and the raw material of the POE layer contains peroxide-3,5,5-trimethylhexanoic acid tert-butyl ester 1 kg, and the other is the same as Example 2.

[0070] Comparative Example 2

[0071] The difference between this comparative example and Example 2 is that the raw material of the two EVA layers of this comparative example both contains UVG 365 1.5 kg, and the other is the same as Example 2.

[0072] Comparative Example 3

[0073] The difference between this comparative example and Example 2 is that the raw material of the POE layer of this comparative example contains peroxide-3,5,5-trimethylhexanoic acid tert-butyl ester 1 kg, and the other is the same as Example 2.

[0074] The prepared light conversion film is used to prepare a photovoltaic module. The photovoltaic module comprises a first glass plate, a first light conversion film compounded on the first glass plate, a cell compounded on the first light conversion film, a second light conversion film compounded on the cell, a second glass plate compounded on the second light conversion film; and finally a photovoltaic module is prepared according to the preparation of the photovoltaic module. The first light conversion film and the second light conversion film are made of the same material, and are the light conversion films prepared in the examples or the comparative examples.

[0075] Performance test

[0076] The light transmittance (%) and the peel strength (N / cm) of the light conversion films prepared in the examples and the comparative examples are determined according to the standard GB / T 29848-2018, and the initial module power (W) and the photovoltaic module power after UV 60kwh (W) of the photovoltaic modules prepared in the application examples and the comparative application examples are determined according to the standard IEC61215. The specific results are shown in Table 1.

[0077] Table 1 Performance of different light conversion films

[0078]

[0079] From Table 1, it can be seen that when preparing the light conversion film with the EPE structure, after adding the peroxide crosslinking agent and the light conversion agent separately, the light conversion rate of the light conversion film can be significantly improved, so that the initial module power of the photovoltaic module prepared with the light conversion film is significantly improved; in addition, the module power of the photovoltaic module after ultraviolet irradiation is also significantly improved. Although the light conversion film prepared in the present application does not add a peroxide crosslinking agent in the POE layer, the peel strength is reduced, but it still maintains a certain bonding strength and meets the corresponding bonding performance.

[0080] The specific embodiments are only an explanation of the present application, and are not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the present specification, as long as the modifications are within the scope of the claims of the present application.

Claims

1. A light conversion film effective to protect a light conversion agent, characterized by, The light conversion film is an EPE structure, i.e. comprising two EVA layers and a POE layer sandwiched between the two EVA layers; the raw material for preparing the POE layer does not contain a peroxide crosslinking agent, and the raw material for preparing the POE layer comprises a light conversion agent; the raw material for preparing the EVA layer comprises a peroxide crosslinking agent and does not comprise a light conversion agent.

2. The light conversion film according to claim 1, characterized in that, The EVA layer comprises the following raw materials by weight, with the weight of the EVA layer as the reference: EVA resin 100 parts, peroxide crosslinking agent 0.1-3 parts, coupling agent for EVA layer 0.1-5 parts, anti-aging agent for EVA layer 0-1 part.

3. The light conversion film according to claim 2, characterized in that, The raw material for preparing the EVA layer further comprises 0.1-2 parts of a co-crosslinking agent, with the weight of the EVA layer as the reference.

4. The light conversion film of claim 1, wherein, The POE layer comprises the following raw materials by weight, with the weight of the POE layer as the reference: POE resin 100 parts, light conversion agent 0.01-5 parts, coupling agent for POE layer 0.1-2 parts, anti-aging agent for POE layer 0-1 part.

5. The light conversion film of claim 1, wherein, The light conversion agent is an organic light conversion agent or an inorganic light conversion agent with an organic ligand.

6. The light conversion film of claim 1, wherein, The peroxide crosslinking agent is selected from any one or more of t-butyl hydroperoxide, t-butyl peroxy-2-ethylhexyl carbonate, t-amyl peroxy-2-ethylhexyl carbonate, 2,5-dimethyl-2,5-bis(t-butylperoxy)hexane, t-butyl peroxy-3,5,5-trimethylhexanoate, di(4-methylbenzoyl)peroxide, dibenzoyl peroxide, 1,1-di-t-butylperoxy cyclohexane, n-butyl-4,4-di(t-butylperoxy)valerate, dicumyl peroxide and 1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane.

7. The light conversion film according to claim 3, wherein The co-crosslinking agent is selected from any one or more of triallyl isocyanurate, triallyl cyanurate and an acrylic co-crosslinking agent.

8. The light conversion film according to claim 4, wherein, The coupling agent for the POE layer is selected from any one or more of a vinyl silane coupling agent, a chloroalkyl silane coupling agent, an aminoalkyl silane coupling agent, an epoxyalkyl silane coupling agent, a methacryloyloxyalkyl silane coupling agent, a sulfur-containing alkyl silane coupling agent, a pseudohalogen silane coupling agent or a quaternary ammonium alkyl silane coupling agent.

9. Use of the light conversion film according to any one of claims 1 to 8, characterized in that, The light conversion film is used for the preparation of a photovoltaic module.

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