TPO packaging adhesive film with light conversion capability for photovoltaic module and preparation method of TPO packaging adhesive film

Abstract

The invention belongs to the technical field of photovoltaic materials, and particularly relates to a TPO packaging adhesive film with light conversion capability for a photovoltaic module and a preparation method of the TPO packaging adhesive film, and the TPO packaging adhesive film comprises the following components in parts by mass: 52-78 parts of a TPO matrix, 2-8 parts of light conversion master batch and 20-40 parts of silane master batch; the light conversion master batch comprises a light conversion reagent, and the light conversion reagent is a benzotriazole cyclization compound containing silicon atoms or containing the silicon atoms and unsaturated bonds; according to the TPO packaging adhesive film with the light conversion capability for the photovoltaic module and the preparation method of the TPO packaging adhesive film, through innovative material design and a preparation process, nanoscale dispersion (the particle size is smaller than or equal to 200 nm) and stable bonding of the light conversion agent in a TPO matrix are achieved, and the problems of agglomeration and migration are fundamentally solved.

Description

Technical Field

[0001] This invention belongs to the field of photovoltaic materials technology, specifically relating to a TPO encapsulating film for photovoltaic modules with light conversion capability and its preparation method. Background Technology

[0002] In photovoltaic modules, especially emerging flexible perovskite solar cells, encapsulating films play a crucial role that transcends the traditional "protective layer," serving as a core material system that determines the cell's photoelectric conversion efficiency, long-term operational stability, and overall reliability. Perovskite materials are highly sensitive to water vapor, oxygen, ultraviolet radiation, and chemical corrosion, and their heat resistance is typically lower than that of traditional crystalline silicon materials. This places extremely stringent comprehensive requirements on the encapsulating films.

[0003] 1. Chemical inertness: The encapsulation material itself and its additives (such as light-converting agents, crosslinking agents, and auxiliaries) must have excellent chemical stability to avoid chemical reactions with the perovskite active layer that could lead to corrosion or degradation.

[0004] 2. Excellent optical and mechanical properties: It needs to have high light transmittance (especially in the visible light band) to reduce incident light loss, while the material itself must have high flexibility and resistance to repeated bending to meet the application requirements of flexible batteries.

[0005] 3. Low-temperature processing compatibility: The encapsulation lamination process temperature needs to be strictly controlled within a low range (usually ≤120℃) to adapt to the low thermal stability threshold of perovskite modules.

[0006] To improve the utilization rate of the solar spectrum by the module, existing technologies often incorporate light conversion agents (or light-converting agents) into the encapsulation materials (especially traditional ethylene-vinyl acetate copolymer, EVA). The aim is to convert high-energy but low-efficiency ultraviolet (UV) light into usable visible light, thereby increasing the power generation of the module and potentially extending its lifespan (by reducing the damage of harmful UV light to the battery).

[0007] However, existing technologies, especially EVA-based light conversion encapsulation films and current attempts to improve polyolefin materials, have failed to simultaneously meet the comprehensive requirements of perovskite flexible batteries for encapsulation materials, including low-temperature processability, high flexibility, efficient and stable light conversion function, and long-term anti-migration properties.

[0008] Therefore, how to achieve efficient encapsulation of encapsulation materials with light conversion function in the low-temperature environment required for perovskite flexible batteries is a technical problem that urgently needs to be solved in this field.

[0009] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0010] This disclosure provides at least one TPO encapsulating film for photovoltaic modules with light conversion capability and a method for preparing the same.

[0011] In a first aspect, embodiments of this disclosure provide a TPO encapsulating film for photovoltaic modules with light conversion capability, comprising the following components by mass parts: 52-78 parts of TPO matrix, 2-8 parts of light conversion masterbatch, and 20-40 parts of silane masterbatch; wherein the light conversion masterbatch includes a light conversion reagent, which is a benzotriazole cyclizer containing silicon atoms or containing silicon atoms and unsaturated bonds.

[0012] In one optional embodiment, the benzotriazole cyclide has the following structural formula:

[0013]

[0014] At least one of them.

[0015] In one optional embodiment, the method for preparing the light conversion masterbatch includes: premixing the light conversion reagent, initiator and TPO matrix, granulating by a twin-screw extruder at a temperature of 80-250°C to obtain the light conversion masterbatch.

[0016] In one optional embodiment, the method for preparing the silane masterbatch includes: premixing the silane coupling agent, initiator and TPO matrix, granulating by a twin-screw extruder at a temperature of 80-250°C to obtain the silane masterbatch.

[0017] In one optional embodiment, the silane coupling agent comprises any one or a combination of at least two of vinyl silane coupling agents, chlorinated hydrocarbon silane coupling agents, ammonia hydrocarbon silane coupling agents, epoxy hydrocarbon silane coupling agents, methacryloyloxyalkyl silane coupling agents, sulfur-containing hydrocarbon silane coupling agents, pseudohalogen silane coupling agents, or quaternary ammonia hydrocarbon silane coupling agents; the initiator is a peroxide, including any one or a combination of at least several of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, 2-ethylhexyl carbonate peroxide, dicumyl peroxide, benzoyl peroxide, and bis-tert-butylperoxyisopropylbenzene.

[0018] In an optional embodiment, the product further includes an antioxidant, which includes any one or a mixture of at least two of hindered phenolic antioxidants, aromatic amine antioxidants, phosphite antioxidants, thioether antioxidants, and metal passivating antioxidants.

[0019] In one optional embodiment, the TPO encapsulating film has a basis weight of 100-600 g / m² and a lamination temperature of no more than 125°C.

[0020] Secondly, this disclosure also provides a method for preparing the TPO encapsulating film as described above, comprising: weighing raw materials according to their weight components, mixing and stirring them using a high-speed mixer, and then blending, melt-extruding, cooling and embossing, traction, and winding them into a film using a screw extruder, with the extruder temperature being 80-120°C.

[0021] Thirdly, this disclosure also provides a method for preparing a perovskite photovoltaic module, comprising the following steps: S1, stacking a base plate, a second encapsulating film, a perovskite solar cell module, a first encapsulating film, and a top cover plate sequentially from bottom to top, and fixing them with high-temperature tape to obtain a module module; S2, placing the fixed module module into a laminator for vacuum lamination and curing, setting the lamination temperature to 100-125°C, the lamination pressure to 0.5-1.2 bar, the lamination time to 4-15 min, and the vacuuming time to 4-12 min; S3, removing the laminated cell module from the laminator and cooling it to obtain a perovskite photovoltaic module; wherein, the first encapsulating film is any one of the TPO encapsulating film as described above or a thermoplastic polyolefin elastomer film without light conversion function; the second encapsulating film is the TPO encapsulating film as described above.

[0022] In one optional embodiment, the perovskite solar cell module includes any one of a perovskite single-junction solar cell, a perovskite-silicon tandem solar cell, and a perovskite-copper indium gallium selenide tandem solar cell; the top cover and the bottom plate are any one of flexible substrates made of glass, PET, or PI.

[0023] The beneficial effects of this invention are as follows: In the light conversion masterbatch preparation stage, down-conversion molecules are bonded to the TPO matrix backbone via unsaturated double bond grafting reaction, forming physical entanglement with the TPO molecular chains. In the film extrusion stage, the down-conversion molecule side chains hydrolyze with the silane coupling agent grafted onto the TPO matrix to generate silanol groups. These silanol groups condense to form stable Si-O-Si bonds, thereby chemically anchoring the down-conversion molecules to the TPO matrix, achieving bidirectional covalent bonding, and effectively preventing… Its migration and precipitation simultaneously achieve nanoscale dispersion (particle size ≤200nm) and stable bonding of light conversion agents in the TPO matrix, fundamentally solving the problems of agglomeration and migration; utilizing the thermoplastic properties and low processing temperature window of TPO material itself, it ensures that encapsulation lamination can be completed efficiently at low temperatures ≤125℃, perfectly adapting to the thermosensitivity of perovskite modules, providing an encapsulation film with excellent flexibility, high light transmittance, efficient and stable light conversion function, and long-term barrier performance, meeting the comprehensive and stringent requirements of flexible perovskite photovoltaic modules for encapsulation materials.

[0024] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a photoluminescence image of a non-anti-migration sample in its initial state under 365nm light irradiation, provided in an embodiment of this disclosure.

[0028] Figure 2 Photoluminescence image of a non-anti-migration sample after baking at 150°C for 10 days under 365nm light irradiation, as provided in this embodiment of the disclosure;

[0029] Figure 3 This is a photoluminescence image of an anti-migration sample in its initial state under 365nm light irradiation, provided in an embodiment of this disclosure.

[0030] Figure 4 Photoluminescence pattern of the anti-migration sample provided in this embodiment of the present disclosure after baking at 150°C for 10 days under 365nm light irradiation.

[0031] Figure 1-4 middle:

[0032] The left side shows a light-converting adhesive film, and the right side shows a high-transparency adhesive film. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0035] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0036] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0037] Existing light conversion encapsulation materials based on thermosetting crosslinking systems such as EVA have significant drawbacks when applied to perovskite solar cells:

[0038] 1. Limited UV conversion efficiency and agglomeration problem: During the cross-linking and curing process of EVA, the formed three-dimensional cross-linked network severely restricts the free movement and uniform dispersion of light conversion agent molecules, making it very easy for the light conversion agent particles to agglomerate. Agglomerates not only significantly reduce the effective light-emitting area, but also cause strong light scattering, resulting in incident light loss, and ultimately severely restricting the overall UV conversion efficiency of the material.

[0039] 2. Poor long-term stability (migration problem): Most physically mixed light conversion agent molecules have poor compatibility with the EVA matrix and lack an effective fixation mechanism. During long-term module operation (especially after temperature cycling and damp heat aging), light conversion agent molecules are prone to precipitate (migrate) from the matrix. Migration not only causes the light conversion function to decay over time, but the precipitated molecules may also contaminate the cell interface or react adversely with other encapsulation material components, significantly shortening the module's lifespan.

[0040] 3. Insufficient flexibility and compatibility: EVA materials typically exhibit high brittleness after cross-linking, with a significant decrease in elongation at break. This rigidity makes it difficult for EVA to withstand the repeated bending or rolling stresses necessary for flexible battery applications, posing a risk of encapsulation layer cracking or delamination. This fails to meet the core requirement of high flexibility in encapsulation materials for flexible photovoltaic modules.

[0041] Therefore, the inventors tried to use other materials for encapsulating perovskite batteries. TPO material itself has the characteristics of thermoplasticity and low processing temperature window, but it also has the defects of easy aggregation of light conversion agent leading to low efficiency and poor stability after migration.

[0042] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure below should be considered as the inventor's contribution to this disclosure.

[0043] The following describes some embodiments of the present invention in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0044] This disclosure provides a TPO encapsulating film for photovoltaic modules with light conversion capability, comprising the following components by mass parts: 52-78 parts of TPO matrix, 2-8 parts of light conversion masterbatch, and 20-40 parts of silane masterbatch; the light conversion masterbatch includes a light conversion reagent, which is a benzotriazole cyclizer containing silicon atoms or containing silicon atoms and unsaturated bonds.

[0045] In some embodiments, specifically, the structural formula of the benzotriazole cyclide is as follows:

[0046]

[0047] At least one of them.

[0048] In some embodiments, the specific method for preparing the light conversion masterbatch includes: premixing the light conversion reagent, initiator and TPO matrix, granulating by a twin-screw extruder at a temperature of 80-250°C to obtain the light conversion masterbatch.

[0049] In some embodiments, the specific method for preparing the silane masterbatch includes: premixing the silane coupling agent, initiator and TPO matrix, granulating by a twin-screw extruder at a temperature of 80-250°C to obtain the silane masterbatch.

[0050] In some embodiments, specifically, the silane coupling agent includes any one or a combination of at least two of vinyl silane coupling agents, chlorinated hydrocarbon silane coupling agents, ammonia hydrocarbon silane coupling agents, epoxy hydrocarbon silane coupling agents, methacryloyloxyalkyl silane coupling agents, sulfur-containing hydrocarbon silane coupling agents, pseudohalogen silane coupling agents, or quaternary ammonia hydrocarbon silane coupling agents; the initiator is a peroxide, mainly including any one or a combination of at least several of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, 2-ethylhexyl carbonate peroxide, dicumyl peroxide, benzoyl peroxide, and bis-tert-butylperoxyisopropylbenzene.

[0051] In some embodiments, specifically, antioxidants are also included, said antioxidants being any one or a mixture of at least two of hindered phenolic antioxidants, aromatic amine antioxidants, phosphite antioxidants, thioether antioxidants, and metal passivating antioxidants.

[0052] In some embodiments, specifically, the basis weight of the TPO encapsulating film is 100-600 g / m², and the lamination temperature is not greater than 125°C.

[0053] This disclosure also provides a method for preparing the TPO encapsulating film as described above, comprising: weighing raw materials according to their weight components, mixing and stirring them using a high-speed mixer, and then blending, melt-extruding, cooling and embossing, traction, and winding them into a film using a screw extruder, with the extruder temperature being 80-120℃.

[0054] This disclosure also provides a method for preparing a perovskite photovoltaic module, comprising the following steps: S1, stacking a base plate, a second encapsulating film, a perovskite solar cell module, a first encapsulating film, and a top cover plate sequentially from bottom to top, and fixing them with high-temperature tape to obtain a module module; S2, placing the fixed module module into a laminator for vacuum lamination and curing, setting the lamination temperature to 100-125°C, the lamination pressure to 0.5-1.2 bar, the lamination time to 4-15 min, and the vacuuming time to 4-12 min; S3, removing the laminated cell module from the laminator and cooling it to obtain a perovskite photovoltaic module; wherein, the first encapsulating film is any one of the TPO encapsulating film as described above or a thermoplastic polyolefin elastomer film without light conversion function; the second encapsulating film is the TPO encapsulating film as described above.

[0055] In some embodiments, specifically, the perovskite battery module includes any one of a perovskite single-junction solar cell, a perovskite-silicon tandem solar cell, and a perovskite-copper indium gallium selenide tandem solar cell; the top cover and the bottom plate are any one of flexible substrates made of glass, PET, or PI.

[0056] Example 1

[0057] A method for preparing a thermoplastic TPO film with anti-migration and light conversion capabilities, comprising the following raw material components:

[0058] 78 parts TPO matrix, 2 parts light conversion masterbatch, and 20 parts silane masterbatch.

[0059] The light conversion reagent in the light conversion masterbatch is a benzotriazole cyclide containing silicon atoms or silicon atoms and unsaturated bonds. This benzotriazole cyclide is...

[0060] The preparation method of the above-mentioned TPO film includes the following steps:

[0061] Raw materials were weighed according to their weight components, thoroughly mixed and stirred using a high-speed mixer, and then blended, melt-extruded, cooled and embossed, drawn, and wound into a film using a screw extruder. The extruder temperature was 90℃, and the basis weight was controlled at 425±5g / m² by adjusting the extrusion speed and winding speed. 2 A thermoplastic light-converting film with anti-migration and light-conversion capabilities was obtained.

[0062] Example 2

[0063] Same as Example 1, except that the lamination process and the benzotriazole cyclization are...

[0064]

[0065] Example 3

[0066] Same as Example 1, except that the lamination process and the benzotriazole cyclization are...

[0067]

[0068] Lamination process: The lamination processes of Examples 1-3 are shown in Table 1.

[0069] Table 1 Lamination process in Examples 1-3

[0070] Example Lamination temperature pressure Vacuuming time Lamination time Example 1 90℃ 0.5 bar 6mim 6mim Example 2 120℃ 0.5 bar 6mim 6mim Example 3 140℃ 0.5 bar 6mim 6mim

[0071] Comparative Example 1: The difference from Example 1 is that the downconversion reagent is not the anti-migration chromophore of this invention.

[0072] 78 parts TPO matrix, 2 parts light conversion masterbatch, and 20 parts silane masterbatch.

[0073] The light conversion reagent in the light conversion masterbatch is 4,7-bis(4-tert-butylphenyl)-2H-benzo[…].

[0074] [d][1,2,3]triazole.

[0075] The preparation method of the above-mentioned TPO film includes the following steps:

[0076] Raw materials were weighed according to their weight components, thoroughly mixed and stirred using a high-speed mixer, and then blended, melt-extruded, cooled and embossed, drawn, and wound into a film using a screw extruder. The extruder temperature was 90℃, and the basis weight was controlled at 425±5g / m² by adjusting the extrusion speed and winding speed. 2 A thermoplastic light-converting film with light conversion capability was obtained.

[0077] Comparative Example 2

[0078] A method for preparing a cross-linked ethylene-vinyl acetate (EVA) film with anti-migration and light-conversion capabilities, comprising the following raw material components:

[0079] 100 parts EVA matrix, 1.5 parts tert-butylperoxide-2-ethylhexyl carbonate as crosslinking agent, 0.3 parts triallyl isocyanurate as co-crosslinking agent, 0.8 parts γ-methacryloyloxypropyltrimethoxysilane as silane coupling agent, 0.5 parts β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate as antioxidant, and 0.3 parts bis(2,2,6,6-tetramethylpiperidinyl) sebacate as light stabilizer.

[0080] The preparation method of the above-mentioned TPO film includes the following steps:

[0081] Raw materials were weighed according to their weight components, thoroughly mixed and stirred using a high-speed mixer, and then blended, melt-extruded, cooled and embossed, drawn, and wound into a film using a screw extruder. The extruder temperature was 90℃, and the basis weight was controlled at 425±5g / m² by adjusting the extrusion speed and winding speed. 2 A thermoplastic light-converting film with light conversion capability was obtained.

[0082] Performance testing: The crystallinity of the film, quantum yield, and anti-migration ability of the conversion agent were tested for each example and comparative example.

[0083] Detection methods

[0084] Film crystallinity test: The test method recorded in ISO 11357 was used; quantum yield test: The test method recorded in JIS K0120 was used; anti-migration ability test: The light-converting film and the high-transmittance film were spliced ​​together, laminated, and baked in a 150℃ oven for 10 days. The lamination conditions were: temperature 120℃, pressure 0.5 bar, vacuum time 6 min, and lamination time 6 min. Irradiated with a UVA 365nm ultraviolet lamp in a dark atmosphere, the high-transmittance film emitted blue light due to the migration of the light-converting reagent to the high-transmittance film. The width of the blue fluorescent band represents the migration distance of the light-converting reagent. Figure 1-4 As shown, Figure 1 and Figure 3 The images are the appearances of the non-anti-migration light transfer film and the anti-migration light transfer film after lamination, respectively. Figure 2 and Figure 4 The images show the appearance of the non-anti-migration light-transfer film after lamination and baking, and the anti-migration light-transfer film after lamination and baking, respectively. Initially, the left-side light-transfer film emitted a blue-violet glow at 365 nm. After baking at 150℃ for 10 days, the luminescent area in the non-anti-migration sample expanded beyond the boundary into the right-side high-transmittance film, while the boundary of the anti-migration sample remained unchanged, confirming that the light-transfer agent underwent thermal migration.

[0085] Table 2 Test Results Data Table

[0086] sample Lamination temperature (°C) Crystallinity (%) Quantum yield (%) Is it resistant to migration? Example 1 90℃ 10.2 92.1 yes Example 2 120℃ 11.8 89.2 yes Example 3 140℃ 38.7 61.7 yes Comparative Example 1 120℃ 10.9 93.2 no Comparative Example 2 150℃ 2.3 61.2 yes

[0087] A comparison of Examples 1, 2, and 3 shows that lowering the lamination temperature of the thermoplastic light-converting film can reduce the crystallinity of the film and increase the quantum yield of the cornea. A comparison of Example 2 and Comparative Example 1 shows that the anti-migration light-converting chromophore used has anti-migration properties. A comparison of Example 2 and Comparative Example 2 shows that the quantum yield of the thermoplastic light-converting film is higher than that of the cross-linked light-converting film.

[0088] In summary, this TPO encapsulating film for photovoltaic modules with light conversion capability and its preparation method involve the following steps: During the light conversion masterbatch preparation stage, downconversion molecules are bonded to the TPO matrix backbone via unsaturated double bond grafting reaction, forming physical entanglement with the TPO molecular chains. During the film extrusion stage, the downconversion molecule side chains hydrolyze with the silane coupling agent grafted onto the TPO matrix to generate silanol groups. These silanol groups condense to form stable Si-O-Si bonds, thereby chemically anchoring the downconversion molecules to the TPO matrix, achieving bidirectional covalent bonding, and effectively preventing their migration. The process achieves both migration and precipitation, simultaneously enabling nanoscale dispersion (particle size ≤200nm) and stable bonding of the light conversion agent in the TPO matrix, fundamentally solving the problems of aggregation and migration. Utilizing the thermoplastic properties and low processing temperature window of TPO material itself, the encapsulation lamination can be efficiently completed at low temperatures ≤125℃, perfectly adapting to the thermosensitivity of perovskite modules. It provides an encapsulation film that combines excellent flexibility, high light transmittance, efficient and stable light conversion function, and long-lasting barrier performance, meeting the comprehensive and stringent requirements of flexible perovskite photovoltaic modules for encapsulation materials.

[0089] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A TPO encapsulant film with light conversion capability for photovoltaic modules, characterized in that, The TPO base 52-78 parts, the light conversion master batch 2-8 parts, and the silane master batch 20-40 parts are mixed according to the mass parts. The light conversion master batch includes a light conversion agent, and the light conversion agent is a benzotriazole ring compound containing silicon atoms or containing silicon atoms and unsaturated bonds.

2. The TPO encapsulation adhesive film of claim 1, wherein The structure of the benzotriazole ring compound is 3. The TPO encapsulation adhesive film of claim 1, wherein at least one of the group consisting of The preparation method of the light conversion master batch includes: pre-mixing the light conversion agent, an initiator, and a TPO base, and granulating through a double-screw extruder at a temperature of 80-250°C to obtain the light conversion master batch.

4. The TPO encapsulation adhesive film of claim 1, wherein The preparation method of the silane master batch includes: pre-mixing the silane coupling agent, an initiator, and a TPO base, and granulating through a double-screw extruder at a temperature of 80-250°C to obtain the silane master batch.

5. The TPO encapsulation adhesive film of claim 4, wherein The silane coupling agent includes any one or a combination of at least two of a vinyl silane coupling agent, a chloro-hydrocarbon silane coupling agent, an amino-hydrocarbon silane coupling agent, an epoxy-hydrocarbon silane coupling agent, a methacryloyloxy-alkyl silane coupling agent, a sulfur-containing hydrocarbon silane coupling agent, a pseudohalogen silane coupling agent, or a quaternary amino-hydrocarbon silane coupling agent; The initiator is a peroxide, including any one or a combination of at least multiple of 2,5-dimethyl-2,5-di(tert-butyl peroxy)hexane, tert-butyl peroxy-2-ethylhexyl carbonate, dicumyl peroxide, benzoyl peroxide, and bis-tert-butyl peroxyisopropyl benzene.

6. The TPO encapsulation adhesive film of claim 1, further comprising an antioxidant, and the antioxidant includes any one or a mixture of at least two of a hindered phenol antioxidant, an aromatic amine antioxidant, a phosphite antioxidant, a sulfide antioxidant, and a metal deactivator antioxidant.

7. The TPO encapsulation adhesive film of claim 1, wherein The TPO encapsulation adhesive film has a grammage of 100-600 g / m2, and the lamination temperature is not greater than 125°C. The raw materials are weighed according to the weight components, mixed and stirred using a high-speed mixer, blended through a screw extruder, melt-extruded, cooled and embossed, pulled, and rolled into a film, and the extruder temperature is 80-120°C. The method includes the following steps:

8. A method for preparing the TPO encapsulation adhesive film according to any one of claims 1 to 7, characterized in that, S1. A bottom plate, a second encapsulation adhesive film, a perovskite solar cell module, a first encapsulation adhesive film, and an upper cover plate are sequentially stacked in a bottom-to-top order, and fixed with a high-temperature adhesive tape to obtain an assembly module; S2. The fixed assembly module is placed in a laminator for vacuum lamination and curing, the lamination temperature is set to 100-125°C, the lamination pressure is set to 0.5-1.2 bar, the lamination time is set to 4-15 min, and the vacuum time is set to 4-12 min; 9. A method of producing a perovskite photovoltaic module, characterized by, S3. The laminated battery assembly is taken out of the laminator and cooled to obtain a perovskite photovoltaic assembly. ​ ​ ​ The first encapsulation adhesive film is any one of the TPO encapsulation adhesive films or the thermoplastic polyolefin elastomer adhesive films without light conversion function according to any one of claims 1-7. The second encapsulation adhesive film is the TPO encapsulation adhesive film according to any one of claims 1-7.

10. A perovskite photovoltaic module, characterized by, The first encapsulation adhesive film is any one of the TPO encapsulation adhesive films or the thermoplastic polyolefin elastomer adhesive films without light conversion function according to any one of claims 1-7. The second encapsulation adhesive film is the TPO encapsulation adhesive film according to any one of claims 1-7. The perovskite solar cell module includes any one of a perovskite single-junction solar cell, a perovskite-silicon stacked solar cell, and a perovskite-copper indium gallium selenide stacked solar cell. The upper cover plate and the bottom plate are any one of flexible substrates of glass, PET, and PI. ​

Images