Film-coated front plate for photovoltaic module and photovoltaic module thereof

Abstract

The utility model provides a film-coated front plate for a photovoltaic assembly and the photovoltaic assembly thereof, and belongs to the technical field of photovoltaic assemblies, the film-coated front plate comprises a light-transmitting front plate, and the light-transmitting front plate comprises a first surface; the coating laminated layer is arranged on the first surface; the coating lamination layer comprises SiO2 layers and Ti3O5 layers which are sequentially and alternately stacked, the first layer of the coating lamination layer is the SiO2 layer or the Ti3O5 layer, the last layer of the coating lamination layer is the SiO2 layer or the Ti3O5 layer, and the first layer of the coating lamination layer is in contact with the first surface. According to the utility model, the full penetration of light can be basically realized in the wavelength interval range of the response wave band of the film-coated laminated layer. The light transmittance of the film-coated front plate is improved, and the power generation efficiency of the photovoltaic module with the film-coated front plate is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic modules, relates to a coating technology for photovoltaic modules, and specifically relates to a coating front plate for photovoltaic modules and a photovoltaic module thereof. Background Technique

[0002] Photovoltaic modules are almost all thin solid photovoltaic cells made of semiconductor materials (such as silicon), which are power generation devices used to generate direct current under sunlight irradiation. Therefore, photovoltaic modules can be installed on rooftops and building surfaces, and even on windows, skylights or a part of shading devices to form a photovoltaic power generation system on the building.

[0003] In order to improve the utilization rate of solar energy on photovoltaic modules, according to the law of conservation of energy, the energy of light is constant. When the reflected light decreases, the transmitted light increases. The higher the light transmittance, the higher the light energy utilization rate and the higher the power generation efficiency. Based on this principle, in the prior art, a nanometer film is coated on the surface of the photovoltaic module or an antireflection coating with a nanostructure is etched to reduce the reflectivity of sunlight and improve the light transmittance. Refer to the patent document with the application number CN201820946855.7, which discloses a double-glass photovoltaic module, which sequentially includes an upper tempered glass layer, an upper encapsulation adhesive film, a photovoltaic cell layer, a lower encapsulation adhesive film and a lower tempered glass layer from top to bottom. An aluminum oxide coating layer is provided on the lower surface of the lower tempered glass layer, and a coloring layer is provided on the outer wall of the aluminum oxide coating layer; the coloring layer has any blackness. Since the aluminum oxide coating layer is provided on the lower surface of the lower tempered glass layer, and the coloring layer is provided on the outer wall of the aluminum oxide coating layer, and the coloring layer has any blackness, the waste of light is reduced, so that more light can be reflected onto the light-receiving surface of the photovoltaic cell, improving the light utilization rate of the photovoltaic cell and being beneficial to the improvement of the power generation efficiency of the photovoltaic module; at the same time, the aluminum oxide coating layer effectively enhances the heat dissipation and cooling performance of the photovoltaic module, which is beneficial to extending the service life. Although the power generation efficiency can be improved by the combination of the aluminum oxide coating layer and the coloring layer in this patent document, the power generation efficiency that can be improved by this coating layer structure is limited, and there is still the technical problem of low light transmittance of the coating layer. Summary of the Utility Model

[0004] Aiming at the technical problem of low light transmittance of the coating layer used in photovoltaic modules described in the above background technique, the utility model provides a coating front plate for photovoltaic modules and a photovoltaic module thereof.

[0005] The present utility model provides a coating laminate on the first surface of a light-transmitting front plate. The coating laminate is formed by alternately stacking SiO2 layers and Ti3O5 layers in sequence, such that within the wavelength range of the response band (435 nm to 500 nm), the light transmittance sharply rises to nearly 100%, improving the light transmittance of the coated front plate and further enhancing the power generation efficiency of the photovoltaic module with the coated front plate.

[0006] To solve the above technical problems, the present utility model adopts the following technical solutions:

[0007] The coated front plate of the present utility model for a photovoltaic module includes:

[0008] A light-transmitting front plate, including a first surface;

[0009] A coating laminate, disposed on the first surface;

[0010] The coating laminate includes SiO2 layers and Ti3O5 layers alternately stacked in sequence, wherein the first layer of the coating laminate is an SiO2 layer or a Ti3O5 layer, the last layer of the coating laminate is an SiO2 layer or a Ti3O5 layer, and the first layer of the coating laminate is in contact with the first surface.

[0011] Further defined, the number of SiO2 layers and the number of Ti3O5 layers are both between 5 and 10 layers.

[0012] Further defined, the thickness of the SiO2 layer is between 5 μm and 105 μm; the thickness of the Ti3O5 layer is between 5 μm and 120 μm.

[0013] Further defined, the number of SiO2 layers is 7, and the number of Ti3O5 layers is 8;

[0014] The thickness of the first Ti3O5 layer is 13.2 μm, the thickness of the first SiO2 layer is 38.16 μm, the thickness of the second Ti3O5 layer is 26.59 μm, the thickness of the second SiO2 layer is 24.3 μm, the thickness of the third Ti3O5 layer is 56.47 μm, the thickness of the third SiO2 layer is 5.19 μm, the thickness of the fourth Ti3O5 layer is 113.8 μm, the thickness of the fourth SiO2 layer is 10.59 μm, the thickness of the fifth Ti3O5 layer is 67.86 μm, the thickness of the fifth SiO2 layer is 11.28 μm, the thickness of the sixth Ti3O5 layer is 86.02 μm, the thickness of the sixth SiO2 layer is 22.51 μm, the thickness of the seventh Ti3O5 layer is 39.63 μm, the thickness of the seventh SiO2 layer is 101.34 μm, the thickness of the eighth Ti3O5 layer is 6.54 μm;

[0015] The first layer of Ti3O5 layer is in contact with the first surface.

[0016] It is further defined that the number of SiO2 layers is 8, and the number of Ti3O5 layers is 8;

[0017] The thickness of the first layer of SiO2 layer is 19.23 μm, the thickness of the first layer of Ti3O5 layer is 61.69 μm, the thickness of the second layer of SiO2 layer is 44.91 μm, the thickness of the second layer of Ti3O5 layer is 44.91 μm, the thickness of the third layer of SiO2 layer is 50.24 μm, the thickness of the third layer of Ti3O5 layer is 62.17 μm, the thickness of the fourth layer of SiO2 layer is 31.99 μm, the thickness of the fourth layer of Ti3O5 layer is 86.94 μm, the thickness of the fifth layer of SiO2 layer is 33.33 μm, the thickness of the fifth layer of Ti3O5 layer is 54.67 μm, the thickness of the sixth layer of SiO2 layer is 61.16 μm, the thickness of the sixth layer of Ti3O5 layer is 32.89 μm, the thickness of the seventh layer of SiO2 layer is 47.84 μm, the thickness of the seventh layer of Ti3O5 layer is 83.94 μm, the thickness of the eighth layer of SiO2 layer is 6.11 μm, and the thickness of the eighth layer of Ti3O5 layer is 30.38 μm;

[0018] The first layer of SiO2 layer is in contact with the first surface.

[0019] It is further defined that the light-transmitting front plate further includes a second surface opposite to the first surface, and at least one of the first surface and the second surface is provided with a frosted layer.

[0020] It is further defined that the frosted layer is formed by polishing and frosting at least one of the first surface and the second surface.

[0021] It is further defined that the reflectivity of the coating stack for light in the wavelength range of 380 nm - 435 nm is greater than 50%, and the transmittance for light in the wavelength range of 485 nm - 1150 nm is greater than 70%.

[0022] The photovoltaic module of the present utility model includes the above-mentioned coating front plate for photovoltaic modules and a photovoltaic cell layer;

[0023] The photovoltaic cell layer is in contact with the coating stack or the second surface of the light-transmitting front plate.

[0024] It is further defined that the power generation efficiency of the photovoltaic module is not less than 80% of the power generation efficiency of the photovoltaic cell layer.

[0025] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0026] 1. The present utility model relates to a coating front plate for a photovoltaic module. A coating stack is provided on the first surface of the light-transmitting front plate. The coating stack is composed of SiO2 layers and Ti3O5 layers alternately stacked in sequence. The coating stack can basically achieve total light transmission in the wavelength range of (485 nm to 1150 nm) in the response band, and the light transmittance is close to 100%, improving the light transmittance of the coating front plate and further enhancing the power generation efficiency of the photovoltaic module with the coating front plate.

[0027] 2. By setting the number of SiO2 layers and Ti3O5 layers, the present utility model enables the coating stack to have high light transmittance in the response band. In the wavelength range outside the response band, the light transmittance is very low, and it has a high blocking effect on the blue and purple components in visible light, achieving a color effect and making the photovoltaic module more aesthetically pleasing visually. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural view of the coating stack Figure 1 ;

[0029] Figure 2 is a schematic structural view of the coating stack Figure 2 ;

[0030] Figure 3 is a schematic structural view of the photovoltaic module of the present utility model Figure 1 ;

[0031] Figure 4 is a schematic structural view of the photovoltaic module of the present utility model Figure 2 ;

[0032] Figure 5 is a schematic structural view of the photovoltaic module of the present utility model Figure 3 ;

[0033] Figure 6 is a schematic structural view of the photovoltaic module of the present utility model Figure 4 ;

[0034] Figure 7 is a schematic structural view of the photovoltaic module of the present utility model Figure 5 ;

[0035] Figure 8 is a schematic structural view of the photovoltaic module of the present utility model Figure 6 ;

[0036] Figure 9 is a schematic structural view of the photovoltaic module of the present utility model Figure 7 ;

[0037] Figure 10 is a schematic structural view of the photovoltaic module of the present utility model Figure 8 ;

[0038] Figure 11 Wavelength and transmittance effect of photovoltaic module Figure 1 ;

[0039] Figure 12 Wavelength and transmittance effect of photovoltaic module Figure 2 。

[0040] Among them, 1-SiO2 layer, 2-Ti3O5 layer, 3-coating stack, 4-transparent front plate, 5-frosted layer on the coated surface, 6-frosted layer on the smooth surface, 7-photovoltaic cell layer. Specific implementation mode

[0041] The technical solution of the present utility model will be further explained below in conjunction with the accompanying drawings and embodiments, but the present utility model is not limited to the following described embodiments.

[0042] Embodiment 1

[0043] See Figure 1 and Figure 2 , this embodiment is used for the coated front plate of a photovoltaic module, which includes a transparent front plate 4 and a coating stack 3. The transparent front plate 4 includes a first surface and a second surface arranged opposite to each other. The coating stack 3 is arranged on the first surface. The coating stack 3 includes SiO2 layers 1 and Ti3O5 layers 2 alternately stacked from top to bottom. The first layer and the last layer of the coating stack 3 are SiO2 layers 1 or Ti3O5 layers 2. The first layer of the coating stack 3 is in contact with the first surface. One SiO2 layer 1 and one Ti3O5 layer 2 are correspondingly arranged for each layer. The SiO2 layers 1 and Ti3O5 layers 2 are alternately stacked from top to bottom, making the coating stack 3 a layered structure. Among them, the top layer of the first layer of the coating stack 3 can be an SiO2 layer 1 or a Ti3O5 layer 2; the last layer of the coating stack 3 can be an SiO2 layer 1 or a Ti3O5 layer 2. Among them, the first layer refers to the first layer, and the last layer refers to the last layer.

[0044] Preferably, for the coated front plate of the photovoltaic module in this embodiment, the orthographic projections of the SiO2 layer 1 and the Ti3O5 layer 2 coincide.

[0045] For the coated front plate of the photovoltaic module in this embodiment, its coating stack 3 can basically achieve total light transmission in the wavelength range of (485nm to 1150nm) in the response band, and the transmittance is close to 100%, improving the transmittance of the photovoltaic module and further enhancing the power generation efficiency of the photovoltaic module.

[0046] Embodiment 2

[0047] This embodiment is used for the front plate before coating of a photovoltaic module. On the basis of Embodiment 1, the number of layers of the SiO2 layer 1 and the number of layers of the Ti3O5 layer 2 are both between 5 and 10. The number of layers of the SiO2 layer 1 can be 5, 6, 7, 8, 9, or 10, preferably 7 or 8. The number of layers of the Ti3O5 layer 2 can be 5, 6, 7, 8, 9, or 10, preferably 8.

[0048] Preferably, in this embodiment, the thickness of each SiO2 layer 1 is 5μm - 105μm; specifically, the thickness of each SiO2 layer 1 can be 5μm, 10μm, 15μm, 20μm, 25μm, 30μm, 35μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 95μm, 100μm, or 105μm.

[0049] Preferably, in this embodiment, the thickness of each Ti3O5 layer 2 is 5μm - 120μm; specifically, the thickness of each Ti3O5 layer 2 can be 5μm, 10μm, 15μm, 20μm, 25μm, 30μm, 35μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 95μm, 100μm, 105μm, 110μm, 115μm, or 120μm.

[0050] Among them, the light-transmitting front plate 4 can increase the transmittance corresponding to the light after passing through the coating stack 3.

[0051] Embodiment 3

[0052] This embodiment is used for the front plate before coating of a photovoltaic module. On the basis of Embodiment 1, the number of SiO2 layers 1 is 7, and the number of Ti3O5 layers 2 is 8; the thickness of the first Ti3O5 layer is 13.2 μm, the thickness of the first SiO2 layer is 38.16 μm, the thickness of the second Ti3O5 layer is 26.59 μm, the thickness of the second SiO2 layer is 24.3 μm, the thickness of the third Ti3O5 layer is 56.47 μm, the thickness of the third SiO2 layer is 5.19 μm, the thickness of the fourth Ti3O5 layer is 113.8 μm, the thickness of the fourth SiO2 layer is 10.59 μm, the thickness of the fifth Ti3O5 layer is 67.86 μm, the thickness of the fifth SiO2 layer is 11.28 μm, the thickness of the sixth Ti3O5 layer is 86.02 μm, the thickness of the sixth SiO2 layer is 22.51 μm, the thickness of the seventh Ti3O5 layer is 39.63 μm, the thickness of the seventh SiO2 layer is 101.34 μm, and the thickness of the eighth Ti3O5 layer is 6.54 μm; the first Ti3O5 layer is in contact with the first surface.

[0053] See Figure 12 , this embodiment is used for the front plate before coating of a photovoltaic module. With the spectral wavelength as the abscissa, the range is from 300 nm to 2000 nm, which ranges from the ultraviolet region to the visible light and part of the near-infrared region; with the transmittance as the ordinate, the range is from 0 to 100%. Through the front plate before coating of a photovoltaic module of this embodiment, in the region where the wavelength is close to 400 nm, the transmittance rises rapidly, indicating that the coating stack 3 has a strong blocking ability in the ultraviolet region; the transmittance quickly stabilizes at a relatively high level (close to 100%) between 400 nm and 500 nm, indicating that the material has very good light transmittance for visible light; between 500 nm and 600 nm, the transmittance stabilizes after a slight decrease, which may be due to the material having slight absorption or reflection of certain colors of light; between 600 nm and 1200 nm, the transmittance is relatively stable, with little fluctuation, remaining between 70% and 80%, which means that the material has good light transmittance for this wide wavelength range, but the transmittance does not reach the high value in the visible light region; after 1200 nm, the transmittance gradually rises, reaches another peak at about 1600 nm, and then slightly decreases, indicating that the light transmittance of the coating stack 3 changes in this infrared region. Thus, it can be shown that the coating stack 3 of this embodiment can basically achieve full light transmission within the wavelength range of the response band, with the transmittance close to 100%, improving the power generation efficiency of the photovoltaic module. The reflectance of the coating stack 3 of this embodiment for light in the wavelength range of 380 nm - 435 nm is greater than 50%, and the transmittance for light in the wavelength range of 485 nm - 1150 nm is greater than 70%.

[0054] In this embodiment, a frosted layer is provided on at least one of the first surface and the second surface of the light-transmitting front plate 4. Preferably, in this embodiment, frosted layers are provided on both the first surface and the second surface of the light-transmitting front plate 4, and the frosted layer is formed by grinding and frosting at least one of the first surface and the second surface. Among them, the frosted layer on the side close to the coating stack 3 is the coating surface frosted layer 5, and the frosted layer on the other side is the light surface frosted layer 6.

[0055] Example 4

[0056] This embodiment is used for the coating front plate of a photovoltaic module. On the basis of Example 1, the number of SiO2 layers 1 is 8, and the number of Ti3O5 layers 2 is also 8; the thickness of the first SiO2 layer is 19.23 μm, the thickness of the first Ti3O5 layer is 61.69 μm, the thickness of the second SiO2 layer is 44.91 μm, the thickness of the second Ti3O5 layer is 44.91 μm, the thickness of the third SiO2 layer is 50.24 μm, the thickness of the third Ti3O5 layer is 62.17 μm, the thickness of the fourth SiO2 layer is 31.99 μm, the thickness of the fourth Ti3O5 layer is 86.94 μm, the thickness of the fifth SiO2 layer is 33.33 μm, the thickness of the fifth Ti3O5 layer is 54.67 μm, the thickness of the sixth SiO2 layer is 61.16 μm, the thickness of the sixth Ti3O5 layer is 32.89 μm, the thickness of the seventh SiO2 layer is 47.84 μm, the thickness of the seventh Ti3O5 layer is 83.94 μm, the thickness of the eighth SiO2 layer is 6.11 μm, and the thickness of the eighth Ti3O5 layer is 30.38 μm; the first SiO2 layer is in contact with the first surface.

[0057] See Figure 11, this embodiment is used for the coating front plate of a photovoltaic module. With the spectral wavelength as the abscissa, the range is from 300 nm to 2000 nm, which ranges from the ultraviolet region to the visible light and a part into the near-infrared region; with the transmittance as the ordinate, the range is from 0 to 100%. Through the coating front plate used in this embodiment for the photovoltaic module, between 380 nm - 430 nm, the light transmittance is very low, and the coating stack 3 has a very high blocking effect on this part of the light; between 430 nm - 500 nm, the light transmittance rises sharply to nearly 100%, indicating that the coating stack 3 has high light transmittance for the blue and green components in visible light, achieving a colorful effect and being more beautiful; between 500 nm and 1150 nm, the light transmittance still remains at a relatively high level, indicating that the coating stack 3 still has good light transmittance for the light in this interval, with a light transmittance close to 100%; around 1150 nm, the light transmittance begins to decline, dropping to about 70%, which may indicate that the coating stack 3 starts to have a certain absorption or reflection of light here; between 1200 nm and about 1600 nm, the light transmittance is relatively flat and gradually decreases to about 65%, indicating that the coating stack 3 has relatively consistent light transmittance for the end of the entire visible spectrum and the near-infrared region; between 1600 nm and 2000 nm, the light transmittance continues to decline slowly, showing a gradual decrease in the light transmittance of the coating stack 3 for this long-wave infrared. Thus, it can be shown that the coating stack 3 in this embodiment can basically achieve full light transmission within the wavelength range of the response band, with a light transmittance close to 100%, improving the power generation efficiency of the photovoltaic module. In the wavelength range outside the response band, the light transmittance is very low, having a high blocking effect on the blue and green components in visible light, achieving a colorful effect, making the photovoltaic module more aesthetically pleasing visually. In this embodiment, the reflectance of the coating stack 3 for the light in the wavelength range of 380 nm - 435 nm is greater than 50%, and the transmittance of the light in the wavelength range of 485 nm - 1150 nm is greater than 70%.

[0058] In this embodiment, at least one of the first surface and the second surface of the light-transmitting front plate 4 is provided with a frosted layer. Preferably, in this embodiment, both the first surface and the second surface of the light-transmitting front plate 4 are provided with frosted layers, and the frosted layer is formed by grinding and frosting at least one of the first surface and the second surface. Among them, the frosted layer on the side close to the coating stack 3 is the coating surface frosted layer 5, and the frosted layer on the other side is the light surface frosted layer 6.

[0059] Embodiment 5

[0060] The photovoltaic module of this embodiment includes the coating front plate for the photovoltaic module according to any one of Embodiments 1 - 4 and the photovoltaic cell layer 7, and the photovoltaic cell layer 7 is in contact with the second surface of the coating stack 3 or the light-transmitting front plate 4. That is, refer to Figure 3 、 Figure 4 、 Figure 5 、 Figure 6, Figure 7 , Figure 8 , Figure 9 and Figure 10 , the photovoltaic cell layer 7 can be arranged on the first layer or the last layer of the coating stack 3, and any one of the SiO2 layer 1 and the Ti3O5 layer 2 is connected to the photovoltaic cell layer 7.

[0061] Preferably, the power generation efficiency of the photovoltaic module in this embodiment is not less than 80% of the power generation efficiency of the photovoltaic cell layer 7.

[0062] Among them, for the photovoltaic module in this embodiment, during use, refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 , it can be that the coating stack 3 is arranged facing the light; refer to Figure 7 , Figure 8 , Figure 9 and Figure 10 , or it can be that the coating stack 3 is arranged facing the photovoltaic cell layer 7.

[0063] In this embodiment, any one of the methods of electron beam evaporation source coating, ion beam assisted coating, energy control coating or mass filtering coating can be adopted for arranging the coating stack 3 on the photovoltaic cell layer 7.

[0064] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Coated front plate for a photovoltaic module, characterized in that, Comprising: A light-transmitting front plate (4), including a first surface; A coating stack (3) disposed on the first surface; The coating stack (3) includes SiO2 layers (1) and Ti3O5 layers (2) alternately stacked in sequence, wherein the first layer of the coating stack (3) is an SiO2 layer (1) or a Ti3O5 layer (2), the last layer of the coating stack (3) is an SiO2 layer (1) or a Ti3O5 layer (2), and the first layer of the coating stack (3) is in contact with the first surface; The light-transmitting front plate (4) further includes a second surface disposed opposite to the first surface, and at least one of the first surface and the second surface is provided with a sandblasted layer; The coating stack (3) has a reflectivity greater than 50% for light in the wavelength range of 380nm - 435nm and a transmittance greater than 70% for light in the wavelength range of 485nm - 1150nm, improving the light transmittance of the coated front plate.

2. The pre-coated front plate for a photovoltaic module according to claim 1, wherein The number of SiO2 layers (1) and the number of Ti3O5 layers (2) are both between 5 and 10 layers.

3. The coated front plate for a photovoltaic module according to claim 2, characterized in that, The thickness of the SiO2 layer (1) is between 5μm - 105μm; the thickness of the Ti3O5 layer (2) is between 5μm - 120μm.

4. The coating front plate for a photovoltaic module according to claim 1, wherein, The number of SiO2 layers (1) is 7, and the number of Ti3O5 layers (2) is 8; The thickness of the first Ti3O5 layer is 13.2μm, the thickness of the first SiO2 layer is 38.16μm, the thickness of the second Ti3O5 layer is 26.59μm, the thickness of the second SiO2 layer is 24.3μm, the thickness of the third Ti3O5 layer is 56.47μm, the thickness of the third SiO2 layer is 5.19μm, the thickness of the fourth Ti3O5 layer is 113.8μm, the thickness of the fourth SiO2 layer is 10.59μm, the thickness of the fifth Ti3O5 layer is 67.86μm, the thickness of the fifth SiO2 layer is 11.28μm, the thickness of the sixth Ti3O5 layer is 86.02μm, the thickness of the sixth SiO2 layer is 22.51μm, the thickness of the seventh Ti3O5 layer is 39.63μm, the thickness of the seventh SiO2 layer is 101.34μm, the thickness of the eighth Ti3O5 layer is 6.54μm; The first Ti3O5 layer is in contact with the first surface.

5. The coated front plate for a photovoltaic module according to claim 1, characterized in that, The number of SiO2 layers (1) is 8, and the number of Ti3O5 layers (2) is 8; The thickness of the first SiO2 layer is 19.23 μm, the thickness of the first Ti3O5 layer is 61.69 μm, the thickness of the second SiO2 layer is 44.91 μm, the thickness of the second Ti3O5 layer is 44.91 μm, the thickness of the third SiO2 layer is 50.24 μm, the thickness of the third Ti3O5 layer is 62.17 μm, the thickness of the fourth SiO2 layer is 31.99 μm, the thickness of the fourth Ti3O5 layer is 86.94 μm, the thickness of the fifth SiO2 layer is 33.33 μm, the thickness of the fifth Ti3O5 layer is 54.67 μm, the thickness of the sixth SiO2 layer is 61.16 μm, the thickness of the sixth Ti3O5 layer is 32.89 μm, the thickness of the seventh SiO2 layer is 47.84 μm, the thickness of the seventh Ti3O5 layer is 83.94 μm, the thickness of the eighth SiO2 layer is 6.11 μm, and the thickness of the eighth Ti3O5 layer is 30.38 μm; The first SiO2 layer contacts the first surface.

6. The coated front plate for a photovoltaic module according to claim 5, characterized in that, The frosting layer is formed by grinding and frosting at least one of the first surface and the second surface.

7. A photovoltaic module, characterized in that, It includes the pre-coated front plate for a photovoltaic module described in claim 6 and a photovoltaic cell layer (7); The photovoltaic cell layer (7) contacts the second surface of the coating stack (3) or the transparent front plate (4).

8. The photovoltaic module according to claim 7, characterized in that, The power generation efficiency of the photovoltaic module is not less than 80% of the power generation efficiency of the photovoltaic cell layer (7).

Images