Solar cell photovoltaic module

Abstract

The utility model relates to the technical field of photoelectric device, concretely relates to solar cell photovoltaic module. The solar cell photovoltaic module of the utility model, including the cover plate, the antireflection layer, the cell piece, the back encapsulation adhesive film layer, the back plate that are sequentially laminated along the light incidence direction, and the edge sealing layer located at the both sides of cell piece, the edge sealing layer connects the cover plate and back plate, and the edge sealing layer and cover plate, back plate jointly enclose the encapsulation space of protection cell piece, antireflection layer and back encapsulation adhesive film layer, wherein the thickness of antireflection layer between cover plate and cell piece is 0.1mm to 2mm.

Description

Technical Field

[0001] This utility model relates to the field of optoelectronic device technology, specifically to solar cell photovoltaic modules. Background Technology

[0002] Due to its advantages such as being clean and pollution-free, having large reserves, and having a long service life, photovoltaic modules have become one of the most promising new energy devices today.

[0003] In photovoltaic modules, the solar cell is the core component for light reception and photoelectric conversion. However, as sunlight penetrates the cover plate to reach the cell surface, it undergoes multiple reflections due to the refractive index differences between the cover plate and the air, and between the cover plate and the cell, leading to a decrease in the cell's photoelectric conversion efficiency. In traditional technology, to avoid light reflection losses caused by the refractive index difference of the light-receiving surface, an anti-reflection layer is typically placed on the light-receiving surface of the solar cell. In this case, the thickness of the anti-reflection layer is approximately 100 nm or less, and the material of the first anti-reflection layer is typically at least one of MgF2 and LiF. For example, see [reference needed]. Figure 1 The solar cell includes a first electrode layer 1311, a first antireflective layer 1312, a transparent conductive layer 1313, an electron transport layer 1314, a perovskite layer 1315, a hole transport layer 1316, an interconnect layer 1330, a first conductivity type doped layer 1321, a first passivation layer 1322, a silicon substrate 1323, a second passivation layer 1324, a second conductivity type doped layer 1325, a transparent conductive oxide layer 1326, and a second electrode layer 1327, all arranged along the light incident direction. However, the aforementioned first antireflective layer 1312 is only limited to the interior of the solar cell 130. This type of vapor-deposited antireflective material will dissolve in the encapsulation film during subsequent module fabrication, causing the antireflective effect to fail. In addition, the commonly used encapsulation method for perovskites is to laminate them with hot melt adhesive films such as POE, EVA or PVB at 120-150℃. According to literature reports, a temperature of 120℃ can decompose some organic components in perovskites, thereby affecting the performance of the battery and making it difficult to balance the overall light absorption efficiency and long-term reliability of the module. Utility Model Content

[0004] Based on this, the present invention provides a solar cell photovoltaic module. Through the synergy of its various structures, the solar cell photovoltaic module of the present invention can reduce sunlight reflection loss and increase the effective light flux of the cells; moreover, the anti-reflection layer exhibits excellent compatibility with other structures, further enhancing the overall light transmittance.

[0005] In a first aspect, this utility model provides a solar cell photovoltaic module, the solar cell photovoltaic module comprising a cover plate, an anti-reflection layer, a solar cell, a back sealing film layer and a back sheet stacked sequentially along the incident direction of light, and an edge sealing layer located on both sides of the solar cell, the edge sealing layer connecting the cover plate and the back sheet, the edge sealing layer together with the cover plate and the back sheet forming an encapsulation space protecting the solar cell, the anti-reflection layer and the back sealing film layer.

[0006] The antireflective layer located between the cover plate and the battery cell has a thickness of 0.1 mm to 2 mm.

[0007] In some embodiments, the antireflection layer comprises an organosilicon antireflection layer.

[0008] In some embodiments, the back-side encapsulating film layer includes an organosilicon antireflective layer.

[0009] In some embodiments, the thickness of the antireflective layer is 1 mm to 2 mm.

[0010] In some embodiments, the side of the cover plate facing away from the antireflective layer is the light-receiving surface of the photovoltaic module, and the light-receiving surface has a textured surface.

[0011] In some embodiments, the size of the velvet structure is from 0.01 μm to 5 μm.

[0012] In some embodiments, the edge width of the edge sealing layer is greater than or equal to 1 cm.

[0013] In some embodiments, the edge sealing layer is a polyisobutylene adhesive layer.

[0014] In some embodiments, the solar cell includes a top solar cell and a bottom solar cell stacked along the direction of light incidence, with the top solar cell located on the side of the solar cell closer to the antireflection layer.

[0015] In some embodiments, the top solar cell is a perovskite solar cell, the bottom solar cell is a silicon-based heterojunction solar cell, and an interconnect layer is provided between the top solar cell and the bottom solar cell.

[0016] In other embodiments, the battery cell is a perovskite battery.

[0017] The solar cell photovoltaic module provided by this utility model has at least the following beneficial effects:

[0018] The solar photovoltaic module of this invention, through the synergy of its various structures, can reduce sunlight reflection loss and increase the effective light flux of the cells. Furthermore, the anti-reflection layer exhibits excellent compatibility with other structures, further enhancing overall light transmittance. The silicone anti-reflection layer can also serve as an encapsulating film, reducing the need for encapsulation layers and simplifying the battery pack encapsulation process. In addition, the cover plate, as the outer protective and supporting structure of the module, works in conjunction with the anti-reflection layer of a specific thickness to prevent anti-reflection failure caused by physical wear or chemical corrosion, further ensuring long-term anti-reflection performance and ultimately improving the photoelectric efficiency of the solar photovoltaic module. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a solar cell in traditional technology;

[0021] Figure 2 This is a schematic diagram of the structure of a solar cell photovoltaic module provided as an example of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of a solar cell photovoltaic module provided as another example of the present invention;

[0023] Figure 4 A schematic diagram of the structure of the battery cell provided by this utility model;

[0024] Figure 5 This is a reflectivity curve of the photovoltaic module in Embodiment 1 and Comparative Example 1 of this utility model.

[0025] Explanation of reference numerals in the attached figures

[0026] 10. Solar cell photovoltaic module; 110. Cover plate; 120. Anti-reflective layer; 130. Solar cell; 140. Back sealant layer; 150. Backsheet; 160. Edge sealing layer; 1310. Top solar cell; 1320. Bottom solar cell; 1330. Interconnect layer; 1311. First electrode layer; 1312. First anti-reflective layer; 1313. Transparent conductive layer; 1314. Electron transport layer; 1315. Perovskite layer; 1316. Hole transport layer; 1321. First conductivity type doped layer; 1322. First passivation layer; 1323. Silicon substrate; 1324. Second passivation layer; 1325. Second conductivity type doped layer; 1326. Transparent conductive oxide layer; 1327. Second electrode layer. Detailed Implementation

[0027] The solar photovoltaic module of this utility model will be further described in detail below with reference to specific embodiments. This utility model can 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 complete understanding of the disclosure of this utility model.

[0028] In this utility model, "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] When a numerical range is disclosed herein, the range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are incorporated.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless otherwise stated or in case of conflict, the terms or phrases used herein have the following meanings:

[0031] In this utility model, the terms "multiple", "various", "multiple times", "multi-dimensional", etc., unless otherwise specified, refer to a quantity greater than or equal to 2. For example, "one or more" means one or more or more.

[0032] In this utility model, the terms "first aspect," "second aspect," "third aspect," and "fourth aspect," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or quantity, nor should they be construed as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first," "second," "third," and "fourth," etc., serve only as a non-exhaustive enumeration and should be understood not to constitute a closed limitation on quantity.

[0033] In this utility model, the technical features described in an open-ended manner include both closed technical solutions composed of the listed features and open technical solutions that include the listed features.

[0034] In this utility model, the terms "combination thereof", "arbitrary combination thereof", and "arbitrary combination thereof" include all suitable combinations of any two or more items listed.

[0035] In this utility model, the term "suitable" as used in phrases such as "suitable combination," "suitable method," and "any suitable method" refers to the ability to implement the technical solution of this utility model, solve the technical problem of this utility model, and achieve the expected technical effect of this utility model.

[0036] In this utility model, terms such as "preferred," "better," "more suitable," and "ideal" are merely used to describe implementation methods or embodiments with better effects, and should be understood not to constitute a limitation on the scope of protection of this utility model.

[0037] In this utility model, terms such as "further," "even further," and "particularly" are used for descriptive purposes to indicate differences in content, but should not be construed as limiting the scope of protection of this utility model.

[0038] In this utility model, the terms "optionally," "optionally," and "optional" refer to options that are optional, meaning they are selected from either "with" or "without." If multiple "options" appear in a technical solution, unless otherwise specified and there are no contradictions or mutual constraints, each "option" is independent.

[0039] For details regarding the solar cell photovoltaic module provided by this utility model, please refer to [link / reference]. Figure 2 , Figure 3 In a first aspect, this utility model provides a solar photovoltaic module 10, comprising a cover plate 110, an anti-reflective layer 120, a solar cell 130, a back-side encapsulating film layer 140, a back sheet 150, and edge sealing layers 160 located on both sides of the solar cell 130. The edge sealing layers 160 connect the cover plate 110 and the back sheet 150, and the edge sealing layers 160, the cover plate 110, and the back sheet 150 together form an encapsulation space protecting the solar cell 130, the anti-reflective layer 120, and the back-side encapsulating film layer 140. The thickness of the anti-reflective layer 120 located between the cover plate 110 and the solar cell 130 is 0.1 mm to 2 mm. For example, the thickness of the anti-reflective layer 120 includes, but is not limited to, 0.1 mm, 0.5 mm, 1 mm, 1.5 mm, or 2 mm, or any two of the above values ​​as endpoints.

[0040] The solar photovoltaic module 10 of this invention, through the synergy of its various structures, can reduce the reflection loss of sunlight and increase the effective light flux of the solar cells 130; moreover, the anti-reflection layer 120 exhibits excellent compatibility with other structures, further enhancing the overall light transmittance. Furthermore, the cover plate 110, as the outer protective and supporting structure of the module, in conjunction with the anti-reflection layer 120 of a specific thickness, can prevent anti-reflection failure caused by physical wear or chemical corrosion, further ensuring long-term anti-reflection performance, thereby improving the photoelectric efficiency of the solar photovoltaic module 10.

[0041] This application has found that conventional MgF2 and LiF have poor compatibility with the encapsulating film in the solar cell photovoltaic module 10. Specifically, MgF2 and LiF can dissolve in the encapsulating film located above the solar cell, resulting in a reduced anti-reflection effect. Therefore, in some examples, the anti-reflection layer 120 includes an organosilicon anti-reflection layer 120.

[0042] In some of these examples, the back-side encapsulation film layer 140 includes a silicone antireflective layer 120.

[0043] This application discovers that the organosilicon antireflective layer 120 has a suitable refractive index, which can effectively reduce light reflection and increase light flux. Furthermore, this application also discovers that the silicon-based active groups in the organosilicon antireflective layer 120 can adsorb onto the cover plate 110, the solar cell 130, or the backplate 150, and it can also serve as an encapsulating film; that is, the organosilicon antireflective layer 120 combines the antireflective function with the adhesive and protective properties of an encapsulating film, simultaneously achieving the dual functions of reducing light reflection and encapsulating fixation. Therefore, it can also reduce the process of encapsulating film layers and simplify the battery pack encapsulation process.

[0044] Furthermore, the anti-reflective layer 120 is prepared by mixing adhesive A and adhesive B in a certain proportion, then degassing, coating, laminating, and curing. Component A is the base adhesive, mainly composed of hydroxyl-terminated polydimethylsiloxane, fillers, and some additives. Adhesive B is the curing agent, mainly composed of catalysts and crosslinking agents.

[0045] Optionally, the antireflective layer 120 includes a polysiloxane layer.

[0046] Optionally, the back-side encapsulation film layer 140 includes a polysiloxane layer.

[0047] Optionally, the polysiloxane layer can be formed by the condensation of methyl orthosilicate and methyldiethoxysilane. Further optionally, the preparation method of the polysiloxane layer includes: diluting the mixture of methyl orthosilicate and methyldiethoxysilane with anhydrous ethanol; then slowly adding acetic acid to prepare solution A. Mixing silica sol with a particle size less than 20 nm and a solid content of 40% with an acrylic emulsion to prepare solution B. Mixing solution A and solution B to obtain a mixture. Coating the mixture and curing it at 80°C to 120°C to prepare the polysiloxane layer. The polysiloxane layer has a low curing temperature, therefore it can be laminated and encapsulated below 120°C, which avoids the performance degradation problem caused by high-temperature encapsulation of the solar cell 130 containing the perovskite layer 1316.

[0048] In addition, the silicone antireflective layer can be used as an encapsulating film to reduce the encapsulation film process and simplify the battery pack encapsulation process. Preferably, the thickness of the antireflective layer 120 is 1 mm to 2 mm.

[0049] In some examples, the thickness of the back encapsulation film layer 140 is from 0.1 mm to 2 mm. For example, the thickness of the back encapsulation film layer 140 includes, but is not limited to, 0.5 mm, 0.6 mm, 0.65 mm, 0.7 mm, 1 mm, 1.5 mm or 2 mm, or any two of the above point values ​​as endpoint values.

[0050] The antireflective layer 120 and the back encapsulation film layer 140 are polysiloxane layers with a thickness of 0.1 mm to 2 mm. They can rely on the good light transmittance, weather resistance and compatibility of polysiloxane with the encapsulation film to ensure the antireflective effect and interlayer stability, thereby reducing the reflectivity.

[0051] In some of these examples, the cover plate 110 is made of glass.

[0052] In some of these examples, the back panel 150 is made of glass.

[0053] The cover plate 110 and the back plate 150 are made of glass, which allows sunlight to efficiently enter the solar cell 130 by taking advantage of the excellent light transmittance of glass. At the same time, the cover plate 110 and the back plate 150 can also protect the anti-reflection layer 120, further improving the overall reliability and service life of the solar photovoltaic module 10.

[0054] In some examples, the side of the cover plate 110 facing away from the antireflective layer 120 is the light-receiving surface of the solar photovoltaic module 10, and the light-receiving surface has a textured surface. That is, the side of the cover plate 110 facing away from the antireflective layer 120 has a textured surface.

[0055] The cover plate 110 has a textured surface on one side of the light-receiving surface, which can reduce surface light reflection loss and extend the light propagation path inside the module. At the same time, it forms multiple anti-reflection effects with the anti-reflection layer 120 and the back encapsulation film layer 140 to improve light transmittance and enhance the light absorption efficiency of the solar cell photovoltaic module 10.

[0056] In some of these examples, the size of the velvet structure ranges from 0.01 μm to 5 μm.

[0057] In this invention, the size of the velvet structure refers to the height of the pyramid-shaped pattern on the velvet surface. For example, the size of the velvet structure includes, but is not limited to, 0.01μm, 0.05μm, 0.1μm, 0.3μm, 0.5μm, 0.8μm, 1μm, 1.5μm, 2μm, 2.5μm, 3μm, 3.5μm, 4μm, 4.5μm, or 5μm, or any two of the above values ​​as endpoints within a range.

[0058] In some examples, the edge width of the edge sealing layer 160 is greater than or equal to 1 cm. In this application, the edge width refers to the sealing width of the edge sealing layer 160 around the solar photovoltaic module 10. Further, the edge width of the edge sealing layer 160 is 1 cm to 2 cm.

[0059] See Figure 2 In some of these examples, the solar cell 130 includes a top solar cell 1310 and a bottom solar cell 1320 stacked along the light incident direction of the solar photovoltaic module 10, with the top solar cell 1310 located on the side of the solar cell 130 closer to the antireflection layer 120.

[0060] In some of these examples, the top cell 1310 is a perovskite cell 130. The bottom cell 1320 is a silicon-based heterojunction cell 130. An interconnect layer 1330 is also provided between the top cell 1310 and the bottom cell 1320.

[0061] In some of these examples, the interconnect layer 1330 is one or more stacks of IZO layer, ITO layer, AZO layer, IZrO layer, VTTO layer, or ICO layer.

[0062] In some of these examples, the thickness of the interconnect layer 1330 ranges from 0.1 nm to 15 nm.

[0063] This application also provides a method for preparing a solar cell photovoltaic module 10, comprising the following steps:

[0064] S10: The solar cell 130 is hot-pressed with solder ribbons. The solder ribbons are located on the front and back electrode layers of the solar cell 130.

[0065] S20: After removing bubbles from the silicone antireflective coating solution, apply it to the two opposite surfaces of the solar cell 130.

[0066] S30: After applying edge sealant around the cover plate 110, the battery cell 130 coated with organosilicon antireflective coating liquid, the cover plate 110 and the back plate 150 are laminated together and laminated at 80℃~120℃ to prepare the solar cell photovoltaic module 10.

[0067] See Figure 4 In some examples, the perovskite solar cell 130 includes a first electrode layer 1311, a transparent conductive layer 1313, an electron transport layer 1314, a perovskite layer 1315, and a hole transport layer 1316 stacked along the thickness direction. The hole transport layer 1316 is located close to the interconnect layer 1330.

[0068] In some examples, the first electrode layer 1311 is made of Ag. Further, the first electrode layer 1311 is a silver gate electrode. Further, the fabrication method of the first electrode layer 1311 includes, but is not limited to, screen printing.

[0069] In some examples, the transparent conductive layer 1313 is made of one or more of IZO, ITO, AZO, IZrO, VTTO, and ICO. In some examples, the thickness of the transparent conductive layer 1313 is 20 nm to 100 nm. The methods for preparing the transparent conductive layer 1313 include, but are not limited to, magnetron sputtering.

[0070] In some of these examples, the perovskite solar cell 130 also includes a buffer layer (not shown) disposed between the transparent conductive layer 1313 and the electron transport layer 1314.

[0071] The material of the buffer layer includes, but is not limited to, tin oxide. As a further example, the thickness of the buffer layer is 5 nm to 20 nm. The methods for fabricating the buffer layer include, but are not limited to, atomic layer deposition (ALD).

[0072] In some examples, the electron transport layer 1314 is made of one or more of metal oxides, graphene, C60, C70, and isomethyl [6,6]-phenyl-C61-butyrate. For example, the metal oxide includes one or more of TiO2 and ZnO. Further, the thickness of the electron transport layer 1314 is 5 nm to 20 nm.

[0073] In some examples, the perovskite solar cell 130 also includes a passivation layer disposed between the electron transport layer 1314 and the perovskite layer 1315. The material of the passivation layer includes, but is not limited to, LiF. For example, the thickness of the passivation layer is 1 nm to 5 nm. Methods for preparing the passivation layer include, but are not limited to, vapor deposition.

[0074] In some examples, the perovskite layer 1315 has the general structural formula ABX3. The A-site includes, but is not limited to, methylamine ions (MA). + CH3NH3 + ), dimethylamine ion ((CH3)2NH2) + ), formamidinium ion (FA) + CH2NH2 + Acetamidinium ion (C2H5NH3) + ), cesium ions (Cs) + ) and rubidium ions (Rb + One or more of the following. The B site includes, but is not limited to, lead ions (Pb). 2+ ), tin ions (Sn) 2+ ) and germanium ions (Ge 2+ One or more of the following. The X-position includes, but is not limited to, bromide ions (Br). - ), iodide ions (I - ) and chloride ions (Cl - One or more of the following methods are used: (1) spin coating, blade coating, slot coating, inkjet printing, and vacuum evaporation. Further, the methods for preparing the perovskite layer 1315 include, but are not limited to, one or two of spin coating, blade coating, slot coating, inkjet printing, and vacuum evaporation. In one example, the thickness of the perovskite layer 1315 is 600 nm to 1200 nm.

[0075] In some examples, the hole transport layer 1316 is made of one or more of the following materials: MeO-4PACz, Me-4PACz, Me-2PACz, MeO-2PAcz, S540, PTAA, PEDOT, NiOx, MoO, and CuS. The methods for preparing the hole transport layer 1316 include, but are not limited to, spin coating, slot coating, blade coating, inkjet printing, chemical bath deposition, vacuum evaporation, and magnetron sputtering.

[0076] See Figure 4 In some examples, the silicon-based heterojunction solar cell 130 includes a first conductivity type doped layer 1321, a first passivation layer 1322, a silicon substrate 1323, a second passivation layer 1324, a second conductivity type doped layer 1325, a transparent conductive oxide layer 1326, and a second electrode layer 1327, which are sequentially stacked along the thickness. The first conductivity type doped layer 1321 is located close to the interconnect layer 1330.

[0077] Optionally, the texture height of the silicon substrate 1323 is 0.5μm to 1μm. This invention reveals that the silicon-based heterojunction solar cell 130 with a small textured surface structure can reduce surface light reflection loss while meeting the deposition requirements of thin film layers such as the first passivation layer 1322, and reducing thin film coverage defects.

[0078] Optionally, the first passivation layer 1322 and the second passivation layer 1324 are made of intrinsic amorphous silicon. The thickness of the first passivation layer 1322 and the second passivation layer 1324 are each independently 0.5 nm to 2 nm.

[0079] In some examples, one of the first conductivity type doped layer 1321 and the second conductivity type doped layer 1325 is an N-type doped layer and the other is a P-type doped layer. The N-type doped layer is N-type microcrystalline silicon or N-type nanocrystalline silicon. The thickness of the N-type doped layer is 30 nm to 200 nm. The P-type doped layer is P-type microcrystalline silicon or P-type nanocrystalline silicon. The thickness of the P-type doped layer is 30 nm to 200 nm.

[0080] In some examples, the transparent conductive oxide layer 1326 is made of one or more of IZO, ITO, AZO, IZrO, VTTO, and ICO. In some examples, the thickness of the transparent conductive oxide layer 1326 is 20 nm to 100 nm. Methods for fabricating the transparent conductive oxide layer 1326 include, but are not limited to, magnetron sputtering.

[0081] In some examples, the second electrode layer 1327 is made of Ag. Further, the second electrode layer 1327 is a silver gate electrode. Further, the fabrication method of the first electrode layer 1311 includes, but is not limited to, screen printing.

[0082] See Figure 3 In other examples, cell 130 is a perovskite cell.

[0083] The following detailed embodiments illustrate the present invention. It should also be understood that the following embodiments are only for further explanation of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention fall within the scope of protection of the present invention. The specific process parameters, etc., in the following embodiments are merely examples within a suitable range; that is, those skilled in the art can make appropriate selections within the appropriate range based on the description herein, and are not necessarily limited to the specific values ​​in the embodiments below.

[0084] Example 1

[0085] The solar photovoltaic module 10 includes: a glass cover plate 110, a polysiloxane layer (1 mm thick), a solar cell 130, a polysiloxane layer (0.65 mm thick), a glass back sheet 150, and an edge sealing layer 160 (polyisobutylene) located on both sides of the solar cell 130. The edge sealing layer 160 connects the glass cover plate 110 and the glass back sheet 150, and together with the glass cover plate 110 and the glass back sheet 150, the edge sealing layer 160 forms a space protecting the solar cell 130 and the polysiloxane layer. The surface of the glass cover plate 110 facing away from the polysiloxane layer is the light-receiving surface of the solar photovoltaic module 10, and the surface of the glass cover plate 110 facing away from the polysiloxane layer has a textured surface with a size of 0.01 μm to 5 μm.

[0086] The fabrication steps of the solar photovoltaic module 10 include: applying solder ribbons to the cell 130 using a hot-pressing method at a temperature of 80°C. The solder ribbons are placed on the light-receiving surface of the cell 130. After removing bubbles, an organosilicon anti-reflective coating solution is applied to two opposing surfaces of the cell 130, with a coating thickness of 1 mm on each surface. A 1 cm layer of polyisobutylene edge sealant is applied around the glass cover plate 110. The cell 130 coated with the organosilicon anti-reflective coating solution, the glass cover plate 110, and the glass backplate 150 are then laminated at 100°C for 20 minutes to fabricate the solar photovoltaic module 10.

[0087] Comparative Example 1

[0088] Photovoltaic modules: A photovoltaic module includes: a glass cover plate, a point of exposure (POE) film, solar cells, a glass backsheet, and edge sealing layers (PIBs) stacked along the thickness direction of the photovoltaic module. The edge sealing layers connect the glass cover plate and the glass backsheet, and together with the glass cover plate and the glass backsheet, they form an encapsulation space protecting the solar cells. The surface of the glass cover plate facing away from the solar cells is the light-receiving surface of the photovoltaic module, and this surface does not have a textured surface. (See also...) Figure 1 The light-receiving surface of the solar cell 130 includes a first electrode layer 1311 and a transparent conductive layer 1313, as well as an anti-reflection layer 1312 (MgF2 with a thickness of 100nm) disposed between the first electrode layer 1311 and the transparent conductive layer 1313.

[0089] The reflectivity of the photovoltaic modules in Example 1 and Comparative Example 1 was measured, and the corresponding test results are as follows: Figure 5 As shown in Table 1, the short-circuit current Jsc, open-circuit voltage Voc, fill factor FF, and photoelectric conversion efficiency Eta of the photovoltaic modules in Example 1 and Comparative Example 1 were measured, and the corresponding test results are shown in Table 1.

[0090] Table 1

[0091]

[0092] From Table 1 and Figure 5 As can be seen, the solar cell photovoltaic module with a specific structure selected in Embodiment 1 of this utility model has a lower reflectivity and a better anti-reflection effect, thereby improving the effective light flux of the cell. Furthermore, as shown in the test results in Table 1, the photoelectric performance of the solar cell photovoltaic module in Embodiment 1 of this application is also superior compared to Comparative Example 1.

[0093] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0094] The above-described embodiments are merely illustrative of several implementations of this utility model, designed to facilitate a detailed understanding of the technical solution of this utility model, but should not be construed as limiting the scope of patent protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the scope of protection of this utility model. It should be understood that technical solutions obtained by those skilled in the art based on the technical solutions provided by this utility model through logical analysis, reasoning, or limited experimentation are all within the scope of protection of the appended claims of this utility model. Therefore, the scope of protection of this utility model patent should be determined by the content of the appended claims, and the specification can be used to interpret the content of the claims.

Claims

1. A solar cell photovoltaic module, characterized in that, The solar photovoltaic module includes a cover plate, an anti-reflection layer, a cell, a back sealing film layer, and a back sheet, which are stacked sequentially along the incident direction of light. The edge sealing layer is located on both sides of the cell. The edge sealing layer connects the cover plate and the back sheet. The edge sealing layer, the cover plate, and the back sheet together form an encapsulation space that protects the cell, the anti-reflection layer, and the back sealing film layer. The antireflective layer located between the cover plate and the battery cell has a thickness of 0.1 mm to 2 mm.

2. The solar cell photovoltaic module according to claim 1, characterized in that, The antireflection layer includes an organosilicon antireflection layer; And / or, the back-side encapsulation film layer includes an organosilicon antireflective layer.

3. The solar cell photovoltaic module according to claim 1, characterized in that, The thickness of the antireflective layer is 1 mm to 2 mm.

4. The solar cell photovoltaic module according to any one of claims 1 to 3, characterized in that, The side of the cover plate facing away from the anti-reflection layer is the light-receiving surface of the photovoltaic module, and the light-receiving surface has a textured surface.

5. The solar cell photovoltaic module of claim 4, wherein, The size of the velvet structure is from 0.01 μm to 5 μm.

6. The solar cell photovoltaic module according to claim 4, characterized in that, The edge width of the edge sealing layer is greater than or equal to 1 cm.

7. The solar cell photovoltaic module according to claim 6, characterized in that, The edge sealing layer is a polyisobutylene adhesive layer.

8. The solar cell photovoltaic module according to any one of claims 1 to 3, characterized in that, The solar cell includes a top solar cell and a bottom solar cell stacked along the direction of light incidence, with the top solar cell located on the side of the solar cell closest to the antireflection layer.

9. The solar cell photovoltaic module of claim 8, wherein, The top solar cell is a perovskite solar cell, the bottom solar cell is a silicon-based heterojunction solar cell, and an interconnect layer is provided between the top solar cell and the bottom solar cell.

10. The solar cell photovoltaic module according to any one of claims 1 to 3, characterized in that, The solar cell is a perovskite solar cell.

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