Light conversion composite film, preparation method therefor, and photovoltaic assembly

Abstract

A light conversion composite film, the light conversion composite film comprising a light conversion layer and an organic anti-transfer layer located on at least one side of the light conversion layer.

Description

Light-converting composite film, preparation method thereof, and photovoltaic module

[0001] Related applications

[0002] This application claims priority to the Chinese patent application filed on December 22, 2023, with application number 202311781692.3 and entitled “Light-converting composite film, preparation method thereof and photovoltaic module”, the entire text of which is hereby incorporated by reference. Technical Field

[0003] The present application relates to the technical field of photovoltaic modules, and in particular to a light-converting composite film, a preparation method thereof, and a photovoltaic module. Background Art

[0004] Solar cells are devices that directly convert light energy into electrical energy through the photoelectric effect or photochemical effect. Heterojunction (HJT) cells have a high theoretical efficiency limit. However, HJT cells are sensitive to ultraviolet (UV) light and are prone to power attenuation under the influence of UV light. Traditionally, light-converting films have been used to address UV attenuation in HJT modules. For example, the UV light-converting agent in the light-converting film converts UV light into visible light, inhibiting UV light from reaching the surface of the HJT cell, thereby reducing its impact on cell power. Current light-converting agents have poor compatibility with the film during use and are prone to migration to the surface and precipitation, seriously affecting the film's light-conversion effect and lifespan.

[0005] Summary of the Invention

[0006] According to various embodiments of the present application, a light-converting composite film, a preparation method thereof, and a photovoltaic module are provided.

[0007] In a first aspect of the present application, a light-converting composite film is provided, comprising:

[0008] a light conversion layer; and

[0009] An organic anti-transfer layer is located on at least one side of the light conversion layer.

[0010] In some embodiments, the material of the organic anti-transfer layer includes polymethyl methacrylate.

[0011] In some embodiments, the thickness of the organic anti-transfer layer is about 20 μm to 100 μm.

[0012] In some embodiments, the light conversion composite film further includes: a coupling agent dispersed in the organic anti-transfer layer.

[0013] In some embodiments, the light conversion layer includes a substrate layer and a light conversion agent dispersed in the substrate layer, and the light conversion agent includes at least one of an organic light conversion agent, an inorganic light conversion agent, and a hybrid light conversion agent.

[0014] In some embodiments, the light conversion agent accounts for about 0.01% to 2% by weight in the substrate layer.

[0015] In some embodiments, the material of the substrate layer includes at least one of ethylene-vinyl acetate copolymer, polyvinyl butyral, polyolefin elastic material, and polyethylene foam material.

[0016] In some embodiments, the light conversion agent includes at least one of an organic fluorescent material, a rare earth metal oxide, a rare earth metal organic complex, and a quantum dot.

[0017] In some embodiments, the light conversion layer has a thickness of about 260 μm to 600 μm.

[0018] In some embodiments, the light conversion composite film further comprises: at least one of an antioxidant and a light stabilizer dispersed in the light conversion layer.

[0019] In some embodiments, the light conversion composite film further comprises: a bonding layer or a cross-linking layer disposed on a surface of the organic anti-transfer layer away from the light conversion layer.

[0020] In a second aspect, the present application provides a method for preparing the light-converting composite film according to the first aspect, the preparation method comprising:

[0021] preparing a light conversion layer;

[0022] Organic anti-transfer layers are respectively formed on two opposite surfaces of the light conversion layer.

[0023] In some embodiments, the organic anti-transfer layer is prepared by at least one of a coating method and a deposition method.

[0024] In some embodiments, the organic anti-transfer layer is deposited using polymethyl methacrylate particles.

[0025] In some embodiments, the diameter of the polymethyl methacrylate particles is about 0.1 μm to 5 μm.

[0026] In a third aspect, the present application provides a photovoltaic module, comprising the light-converting composite film as described in the first aspect.

[0027] In some embodiments, the photovoltaic module further includes a cell, a first glass layer, an adhesive film layer, and a second glass layer.

[0028] Wherein, in the direction gradually away from the cell, the light-converting composite film and the first glass layer are sequentially stacked on the light-absorbing side of the cell, and the adhesive film layer and the second glass layer are sequentially stacked on the backlight side of the cell.

[0029] The details of one or more embodiments of the present application are set forth in the following drawings and description. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings of the application without creative work.

[0031] FIG1 is a schematic structural diagram of a light-converting composite film provided in one embodiment of the present application.

[0032] FIG2 is another structural schematic diagram of a light-converting composite film provided in one embodiment of the present application.

[0033] FIG3 is another schematic structural diagram of a light-converting composite film provided in one embodiment of the present application.

[0034] FIG4 is a schematic structural diagram of a photovoltaic module provided in one embodiment of the present application.

[0035] Among them, 100 is a photovoltaic module; 110 is a first glass layer; 120 is a light-converting composite film; 121 is a light-converting layer; 122 is an organic anti-transfer layer; 123 is an adhesive layer; 124 is a cross-linking layer; 130 is a cell; 140 is an adhesive film layer; and 150 is a second glass layer. DETAILED DESCRIPTION

[0036] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0038] In the present application, when it comes to a numerical interval (i.e., a numerical range), unless otherwise specified, the distribution of the optional numerical values ​​in the numerical interval is considered to be continuous, and includes the two numerical endpoints (i.e., the minimum and maximum values) of the numerical interval, and each numerical value between the two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to an integer in the numerical interval, including the two endpoint integers of the numerical range, and each integer between the two endpoints, is equivalent to directly enumerating each integer. When multiple numerical ranges are provided to describe a feature or characteristic, these numerical ranges can be merged. In other words, unless otherwise specified, the numerical range disclosed in this application should be understood to include any and all subranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. "Numerical interval" allows broadly including quantitative intervals such as percentage intervals, ratio intervals, and ratio intervals.

[0039] In this application, the terms "optionally," "optional," and "optional" mean optional or dispensable, i.e., they refer to either option being selected from two parallel options: "with" or "without." If a technical solution contains multiple "optional" clauses, each "optional" clause is independent unless otherwise specified and there are no contradictions or constraints.

[0040] In this application, the terms "first," "second," and "third," etc., in "the first aspect," "the second aspect," "the third aspect," etc., are used for descriptive purposes only and should not be understood as indicating or implying relative importance or quantity, nor as implicitly indicating the importance or quantity of the technical features indicated. Furthermore, "first," "second," and "third," etc., are only used for non-exhaustive enumeration and description purposes and should be understood not to constitute closed-ended limitations on quantity.

[0041] Traditionally, light conversion agents are classified into organic, inorganic, and hybrid types. Organic light conversion agents have poor weather resistance, while both inorganic and hybrid types have poor compatibility with the film and are prone to surface migration and precipitation, thus affecting the film's light conversion performance and lifespan. This application utilizes organic anti-transfer layers positioned on opposite sides of the light conversion layer. These layers effectively inhibit the surface migration and precipitation of the light conversion agent within the layer, extending the lifespan of the composite film and ultimately improving the long-term UV weatherability of the photovoltaic module.

[0042] In a first aspect, the present application provides a light conversion composite film 120 . As shown in FIG1 , the light conversion composite film 120 includes a light conversion layer 121 and an organic anti-transfer layer 122 located on at least one side of the light conversion layer 121 .

[0043] In the present application, an organic anti-transfer layer 122 is provided on the surface of the light conversion layer 121. The organic anti-transfer layer 122 is not only tightly bonded to the light conversion layer 121, but also can inhibit the migration and precipitation of the light conversion agent in the light conversion layer 121, thereby extending the service life of the light conversion layer 121 and improving the long-term UV weather resistance of the photovoltaic module.

[0044] It should be noted that the light transfer layer 121 in the present application may be a material layer capable of converting ultraviolet light into visible light. The organic anti-transfer layer 122 in the present application refers to an organic material layer that prevents material migration.

[0045] The present application adopts organic materials as the material of the anti-transfer layer, so the introduced organic anti-transfer layer 122 has a poor bonding effect with the layered structure in the photovoltaic module.

[0046] In some embodiments, the material of the organic anti-transfer layer 122 includes polymethyl methacrylate. By using polymethyl methacrylate as the organic anti-transfer layer 122, it has the advantages of good light transmittance and stability, low cost, and easy processing.

[0047] In some embodiments, the organic anti-transfer layer 122 has a thickness of about 20 μm to 100 μm, for example, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, or 100 μm.

[0048] The present application controls the thickness of the organic anti-transfer layer 122 , thereby ensuring a good transfer inhibition effect while preventing the light conversion composite film 120 from being too thick and affecting the transmittance.

[0049] In some embodiments, the light conversion composite film further includes a coupling agent dispersed in the organic anti-transfer layer 122 .

[0050] In the present application, a coupling agent is dispersed in the organic anti-migration layer, and the coupling agent can improve the bonding force between the organic anti-migration layer 122 and other material layers.

[0051] In some embodiments, the coupling agent includes a silane coupling agent, for example, at least one of vinyltriethoxysilane, vinyltrimethoxysilane, vinyltert-butyltriperoxidesilane, vinyltriacetoxysilane, and vinyltri(β-methoxyethoxy)silane.

[0052] In some embodiments, the coupling agent accounts for about 0.2% to 5% by mass in the organic anti-transfer layer 122, for example, it can be 0.2%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5% or 5.0%.

[0053] In some embodiments, the light conversion layer 121 includes a substrate layer and a light conversion agent dispersed in the substrate layer. The light conversion agent includes at least one of an organic light conversion agent, an inorganic light conversion agent, and a hybrid light conversion agent.

[0054] In some embodiments, the mass proportion of the light conversion agent in the substrate layer is about 0.01% to 2%, for example, it can be 0.01%, 0.05%, 0.1%, 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, 1.2%, 1.4%, 1.6%, 1.8% or 2.0%.

[0055] In some embodiments, the material of the substrate layer includes at least one of ethylene vinyl acetate copolymer (EVA), polyvinyl butyral (PVB), polyolefin elastomer (POE), and polyethylene foam (EPE).

[0056] In some embodiments, the light conversion agent includes at least one of an organic fluorescent material, a rare earth metal oxide, a rare earth metal organic complex, and a quantum dot. Examples include organic compounds with large conjugated groups such as distyryl bisbenzoxazole and 2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene, rare earth metal oxides, rare earth metal β-diketones, organic carboxylic acid complexes, C quantum dots, CdS quantum dots, CdSe quantum dots, CdTe quantum dots, ZnS quantum dots, ZnSe quantum dots, and ZnTe quantum dots. The rare earth metal may be Y, Eu, Sr, Tb, Er, or Yb.

[0057] In some embodiments, the thickness of the light conversion layer 121 is about 260 μm to 600 μm, for example, 260 μm, 300 μm, 340 μm, 380 μm, 420 μm, 460 μm, 500 μm, 540 μm, 580 μm or 600 μm.

[0058] In some embodiments, the light conversion composite film further includes: at least one of an antioxidant and a light stabilizer dispersed in the light conversion layer 121 .

[0059] In the present application, antioxidants and light stabilizers are added to the light conversion layer 121 to improve the stability and weather resistance of the light conversion layer 121 .

[0060] In some embodiments, the light conversion composite film further includes: a bonding layer 123 or a cross-linking layer 124 disposed on a surface of the organic anti-transfer layer 122 away from the light conversion layer 121 .

[0061] In the present application, a bonding layer 123 or a cross-linking layer 124 is provided on the surface of the organic anti-transfer layer 122 to improve the bonding stability between the light-converting composite film 120 and other film layers.

[0062] In some embodiments, as shown in FIG. 2 , the light conversion composite film 120 includes a light conversion layer 121 , and both sides of the light conversion layer 121 are sequentially laminated with an organic anti-transfer layer 122 and a bonding layer 123 .

[0063] In some embodiments, as shown in FIG3 , the light conversion composite film 120 includes a light conversion layer 121 , and both sides of the light conversion layer 121 are sequentially laminated with an organic anti-transfer layer 122 and a cross-linking layer 124 .

[0064] In some embodiments, the thickness of the adhesive layer 123 is about 50 μm to 200 μm, for example, 50 μm, 60 μm, 80 μm, 100 μm, 120 μm, 140 μm, 160 μm, 180 μm or 200 μm.

[0065] In some embodiments, the material of the adhesive layer 123 is the same as the base material of the light conversion layer 121. Optionally, the material of the adhesive layer 123 includes at least one of ethylene-vinyl acetate copolymer, polyvinyl butyral, polyolefin elastic material, and polyethylene foam material.

[0066] In some embodiments, the thickness of the cross-linked layer 124 is about 20 μm to 100 μm, for example, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm or 100 μm.

[0067] In some embodiments, the cross-linking layer 124 includes a main body and a cross-linking agent dispersed within the main body. The main body is made of the same material as the base material of the light-converting layer 121. For example, the main body can be made of at least one of ethylene-vinyl acetate copolymer, polyvinyl butyral, a polyolefin elastic material, and polyethylene foam. The cross-linking agent includes at least one of triallyl isocyanurate, triallyl cyanurate, trimethylolpropane trimethacrylate, diethylene glycol dimethacrylate, cumyl peroxide, di-tert-butyl peroxide, diisopropylbenzene hydroperoxide, 2,5-dimethyl-2,5-di-tert-butyl peroxyhexane, n-butyl 4,4-di(tert-amylperoxy)valerate, tert-butyl peroxy-2-ethylhexyl carbonate, and ethyl 3,3-di(tert-butylperoxy)butyrate.

[0068] A second aspect of the present application provides a method for preparing the light-converting composite film 120 as described in the first aspect, the method comprising:

[0069] preparing a light conversion layer 121;

[0070] Organic anti-transfer layers 122 are formed on two opposite surfaces of the light conversion layer 121 .

[0071] In some embodiments, the organic anti-transfer layer 122 is prepared by at least one of a coating method and a deposition method.

[0072] In some embodiments, the organic anti-transfer layer 122 is deposited using polymethyl methacrylate particles.

[0073] In some embodiments, the method for preparing the organic anti-transfer layer 122 includes:

[0074] The light conversion layer 121 is placed in a solution containing PMMA particles, and the solvent in the solution is extracted, and the PMMA particles are deposited on the surface of the light conversion layer 121 to form the organic anti-transfer layer 122. Optionally, the above addition is repeated to obtain organic anti-transfer layers 122 of different thicknesses.

[0075] In some embodiments, the diameter of the polymethyl methacrylate particles is about 0.1 μm to 5 μm, for example, 0.1 μm, 0.2 μm, 0.5 μm, 1.0 μm, 1.5 μm, 2.0 μm, 2.5 μm, 3.0 μm, 3.5 μm, 4.0 μm, 4.5 μm or 5.0 μm.

[0076] The present application controls the diameter of the PMMA particles, thereby adjusting the gap between the PMMA particles in the organic anti-transfer layer 122 , and further making the gap smaller than the particle size of the light conversion agent, thereby effectively preventing the migration and precipitation of the light conversion agent.

[0077] In some embodiments, the method for preparing the light conversion layer 121 includes:

[0078] The monomer of the substrate material, a cross-linking agent, an additive and a light-converting agent are mixed to obtain a slurry, which is then coated and hot-pressed to obtain the light-converting layer 121. The additive includes at least one of a co-cross-linking agent, an antioxidant, a coupling agent and a light stabilizer.

[0079] A third aspect of the present application provides a photovoltaic module, which includes the light-converting composite film 120 as described in the first aspect.

[0080] In some embodiments, the photovoltaic module 100 includes a cell 130, a first glass layer 110, an adhesive film layer 140, and a second glass layer 150. Optionally, the cell 130 is a HJT cell.

[0081] As shown in FIG4 , in a direction gradually away from the cell 130 , the light-converting composite film 120 and the first glass layer 110 are sequentially stacked on the light-absorbing side of the cell 130 , and the adhesive film layer 140 and the second glass layer 150 are sequentially stacked on the backlight side of the cell 130 .

[0082] In some embodiments, the thickness of the first glass layer 110 is about 1 mm to 10 mm, for example, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0083] In some embodiments, the thickness of the adhesive film layer 140 is approximately 300 μm to 800 μm, for example, 300 μm, 350 μm, 400 μm, 450 μm, 500 μm, 550 μm, 600 μm, 650 μm, 700 μm, 750 μm, or 800 μm. Optionally, the material of the adhesive film layer 140 includes at least one of ethylene-vinyl acetate copolymer, polyvinyl butyral, polyolefin elastic material, and polyethylene foam material.

[0084] In some embodiments, the second glass layer 150 has a thickness of about 1 mm to 10 mm, for example, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0085] The embodiments of the present application will be described in detail below with reference to the examples. It should be understood that these examples are intended to illustrate the present application only and are not intended to limit the scope of the present application. The experimental methods for which specific conditions are not specified in the following examples are preferably referred to the guidance provided in the present application, and can also be based on the experimental manuals or conventional conditions in this area, or according to the conditions recommended by the manufacturer, or with reference to experimental methods known in the art.

[0086] Example 1

[0087] This embodiment provides a solar cell, including a cell 130, wherein the cell 130 is an HJT cell, and a light-absorbing surface of the cell 130 is sequentially stacked with a light-converting composite film 120 and a first glass layer 110; and a backlight surface of the cell 130 is sequentially stacked with a film layer 140 and a second glass layer 150.

[0088] The light-conversion composite film 120 comprises a light-conversion layer 121 and organic anti-transfer layers 122 disposed on both sides of the light-conversion layer 121. The base layer of the light-conversion layer 121 is made of EVA and dispersed with a CdS quantum dot light-conversion agent, which accounts for approximately 0.02% by weight of the base layer. The thickness of the light-conversion layer 121 is approximately 400 μm, and the thickness of the organic anti-transfer layer 122 is approximately 20 μm. The thickness of the first glass layer 110 is approximately 2 mm, and the thickness of the second glass layer 150 is approximately 2 mm. The adhesive film layer 140 is an ethylene-vinyl acetate copolymer material layer with a thickness of approximately 440 μm.

[0089] The method for preparing the organic anti-transfer layer 122 includes:

[0090] The light conversion layer 121 is placed in a solution containing PMMA particles, and the solvent in the solution is extracted. The PMMA particles are deposited on the surface of the light conversion layer 121 to form the organic anti-transfer layer 122 , wherein the diameter of the PMMA particles is about 1 μm.

[0091] Example 2

[0092] This embodiment provides a solar cell. Compared to Example 1, the only difference is that the light conversion agent accounts for approximately 1% by weight of the substrate layer. The light conversion layer 121 has a thickness of approximately 260 μm, the organic anti-transfer layer 122 has a thickness of approximately 60 μm, the PMMA particles have a diameter of approximately 5 μm, and a coupling agent is dispersed within the organic anti-transfer layer 122, accounting for approximately 3% by weight of the coupling agent.

[0093] Example 3

[0094] This embodiment provides a solar cell. Compared to Example 1, the only difference is that the light conversion agent accounts for approximately 2% by weight of the substrate layer. The light conversion layer 121 is approximately 600 μm thick, the organic anti-transfer layer 122 is approximately 100 μm thick, the PMMA particles have a diameter of approximately 0.1 μm, and an adhesive layer 123 is provided on the surface of the organic anti-transfer layer 122 facing away from the light conversion layer 121. The adhesive layer 123 is an approximately 100 μm thick layer of ethylene-vinyl acetate copolymer.

[0095] Example 4

[0096] This embodiment provides a solar cell. Compared with Example 1, the only difference is that a cross-linking layer 124 is provided on the surface of the organic anti-transfer layer 122 away from the light conversion layer 121. The thickness of the cross-linking layer 124 is about 60 μm, the main material is ethylene-vinyl acetate copolymer, and the cross-linking agent is triallyl isocyanurate.

[0097] Example 5

[0098] This embodiment provides a solar cell. Compared with the embodiment 1, the only difference is that the thickness of the anti-transfer layer is about 10 μm.

[0099] Example 6

[0100] This embodiment provides a solar cell. Compared with Embodiment 1, the only difference is that the diameter of the PMMA particles is about 7 μm.

[0101] Comparative Example 1

[0102] This embodiment provides a solar cell. Compared with the embodiment 1, the only difference is that the organic anti-transfer layer 122 is replaced by PVDF material.

[0103] Comparative Example 2

[0104] This embodiment provides a solar cell. Compared with the embodiment 1, the only difference is that the organic anti-transfer layer 122 is replaced by a silicon dioxide layer.

[0105] Comparative Example 3

[0106] This embodiment provides a solar cell. Compared with the embodiment 1, the only difference is that the organic anti-transfer layer 122 is not provided.

[0107] The solar cells prepared in the above examples and comparative examples were subjected to performance tests, and the testing method included:

[0108] The solar panels were exposed to ultraviolet (UV) radiation with an intensity of 120W for 500h and a cumulative irradiation of 60kWh. The power attenuation of the solar panels before and after UV irradiation was measured. Power attenuation refers to the rate of change of the power of the solar panels after UV irradiation relative to that before irradiation.

[0109] The test results are shown in Table 1.

[0110] Table 1

[0111] From the table above we can see that:

[0112] (1) By comparing Example 1 with Example 5, it can be seen that the present application controls the thickness of the organic anti-transfer layer 122, thereby ensuring a good transfer inhibition effect while avoiding the light conversion composite film 120 being too thick and affecting the size of the photovoltaic module.

[0113] (2) By comparing Example 1 with Example 6, it can be seen that the present application controls the diameter of the polymethyl methacrylate particles, thereby adjusting the gap between the PMMA particles in the organic anti-transfer layer 122, and further making the gap smaller than the particle size of the light conversion agent, thereby effectively preventing the migration and precipitation of the light conversion agent.

[0114] (3) By comparing Example 1 with Comparative Examples 1-3, it can be seen that the present application sets an organic anti-transfer layer 122 on the surface of the light conversion layer 121. The organic anti-transfer layer 122 is not only tightly combined with the light conversion layer 121, but also can inhibit the migration and precipitation of the light conversion agent in the light conversion layer 121, thereby extending the service life of the light conversion layer 121 and improving the long-term UV weather resistance of the photovoltaic module.

[0115] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0116] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A light-converting composite film, wherein: The light-converting composite film comprises: a light conversion layer; and An organic anti-transfer layer is located on at least one side of the light conversion layer.

2. The light-converting composite film according to claim 1, wherein: The material of the organic anti-transfer layer includes polymethyl methacrylate.

3. The light-converting composite film according to claim 1 or 2, wherein: The thickness of the organic anti-transfer layer is about 20 μm to 100 μm.

4. The light-converting composite film according to any one of claims 1 to 3, wherein: The light conversion composite film further comprises: a coupling agent dispersed in the organic anti-transfer layer.

5. The light-converting composite film according to any one of claims 1 to 4, wherein: The light conversion layer includes a substrate layer and a light conversion agent dispersed in the substrate layer, and the light conversion agent includes at least one of an organic light conversion agent, an inorganic light conversion agent and a hybrid light conversion agent.

6. The light-converting composite film according to claim 5, wherein: The mass proportion of the light conversion agent in the substrate layer is about 0.01% to 2%.

7. The light-converting composite film according to claim 5 or 6, wherein: The material of the substrate layer includes at least one of ethylene-vinyl acetate copolymer, polyvinyl butyral, polyolefin elastic material and polyethylene foam material.

8. The light-converting composite film according to any one of claims 5 to 7, wherein: The light conversion agent includes at least one of an organic fluorescent material, a rare earth metal oxide, a rare earth metal organic complex and a quantum dot.

9. The light-converting composite film according to any one of claims 5 to 8, wherein: The thickness of the light conversion layer is about 260 μm to 600 μm.

10. The light-converting composite film according to any one of claims 1 to 9, wherein: The light conversion composite film further includes: at least one of an antioxidant and a light stabilizer dispersed in the light conversion layer.

11. The light-converting composite film according to any one of claims 1 to 10, wherein: The light conversion composite film further comprises: a bonding layer or a cross-linking layer arranged on the surface of the organic anti-transfer layer away from the light conversion layer.

12. A method for preparing the light-converting composite film according to any one of claims 1 to 11, wherein: The preparation method comprises: preparing a light conversion layer; Organic anti-transfer layers are respectively formed on the opposite side surfaces of the light conversion layer.

13. The preparation method according to claim 12, wherein: The preparation method of the organic anti-transfer layer includes at least one of a coating method and a deposition method.

14. The preparation method according to claim 13, wherein: The organic anti-transfer layer is obtained by depositing polymethyl methacrylate particles.

15. The preparation method according to claim 14, wherein: The diameter of the polymethyl methacrylate particles is about 0.1 μm to 5 μm.

16. A photovoltaic module, wherein: The photovoltaic module comprises the light conversion composite film according to any one of claims 1 to 11.

17. The photovoltaic module according to claim 16, wherein: The photovoltaic module also includes a cell sheet, a first glass layer, a film layer, and a second glass layer; Wherein, along the direction gradually away from the cell, the light-converting composite film and the first glass layer are sequentially stacked on the light-absorbing side of the cell, and the adhesive film layer and the second glass layer are sequentially stacked on the backlight side of the cell.

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