Glass assembly and photovoltaic assembly applied to building integrated photovoltaics (BIPV) curtain wall

Abstract

The glass assembly applied to the BIPV curtain wall comprises a transparent substrate and a microcavity array layer arranged on the surface of one side of the transparent substrate, and the microcavity array layer comprises a plurality of microcavities arranged in an array; the micro-cavity is filled with the solid filling body, and the refractive index of the solid filling body and the depth of the micro-cavity are suitable for enabling the glass assembly to present a structural color through optical interference; the glass assembly further comprises a sealing layer, so that the microcavity array layer is sealed between the sealing layer and the transparent substrate. According to the glass assembly and the photovoltaic assembly applied to the BIPV curtain wall, the light transmittance can be improved, and meanwhile, the color stability and reliability can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of glass curtain wall manufacturing technology, and more specifically, to a glass component and photovoltaic component used in BIPV curtain walls. Background Technology

[0002] Building-integrated photovoltaics (BIPV) facades aim to integrate photovoltaic power generation into building facades, and must simultaneously meet the requirements of high light transmittance and aesthetically pleasing color stability, so as to ensure indoor lighting while meeting architectural aesthetic requirements.

[0003] To improve color saturation, current glass modules typically employ methods such as spraying to form a pigment film on the glass surface. This film develops color by absorbing specific wavelengths of light, resulting in low light transmittance, usually ≤70%. Furthermore, the pigment is prone to degradation and fading under light exposure, and the absorption of infrared light causes the module to overheat, reducing power generation efficiency. In addition, some glass modules incorporate microcavities filled with liquid hydrogel or silicone oil. While this utilizes interference principles to improve light transmittance, the liquid filler is prone to evaporation and leakage, leading to structural collapse and performance degradation. This fails to meet long-term weather resistance requirements and results in poor reliability. Summary of the Invention

[0004] The purpose of this invention is to provide a glass module and photovoltaic module for use in BIPV curtain walls, which can improve light transmittance while ensuring color stability and reliability.

[0005] The embodiments of the present invention are implemented as follows: In one aspect, the present invention provides a glass assembly for use in BIPV curtain walls, comprising a transparent substrate and a microcavity array layer disposed on one side surface of the transparent substrate, the microcavity array layer comprising a plurality of microcavities arranged in an array; further comprising a solid filler filling the microcavities, the refractive index of the solid filler and the depth of the microcavities being suitable for optical interference to make the glass assembly exhibit structural color; the glass assembly further comprises a sealing layer to seal the microcavity array layer between the sealing layer and the transparent substrate.

[0006] Optionally, the solid filler includes a resin matrix and a fluorescent material incorporated within the resin matrix, wherein the fluorescent material can absorb ultraviolet light and emit visible light.

[0007] Optionally, the microcavity is a cylindrical cavity with a diameter of 19-21 micrometers, a depth of 195-205 nanometers, and a spacing of 50 micrometers between adjacent microcavities.

[0008] Optionally, the fluorescent material is a silicate-based long afterglow phosphor, and the resin matrix is ​​a cross-linked silicone resin matrix.

[0009] Alternatively, the microcavity array layer is formed on the surface of the transparent substrate by an etching process.

[0010] Optionally, a UV-curable adhesive layer is disposed on the surface of the transparent substrate, and the microcavity array layer is formed by the UV-curable adhesive layer through a nanoimprinting process.

[0011] Optionally, the sealing layer is a hydrophobic sealing layer, and the contact angle of the sealing layer surface is greater than 150°.

[0012] Optionally, the transparent substrate is ultra-white float glass.

[0013] Optionally, the thickness of the sealing layer is 10-12 micrometers.

[0014] In another aspect, the present invention provides a photovoltaic module, including a photovoltaic cell, a backsheet, and a glass module for use in a BIPV curtain wall; the photovoltaic cell is disposed between the backsheet and the glass module; a first encapsulating adhesive layer is disposed between the photovoltaic cell and the backsheet; and a second encapsulating adhesive layer is disposed between the photovoltaic cell and the glass module.

[0015] The beneficial effects of this invention include: This application provides a glass assembly for BIPV curtain walls, including a transparent substrate and a microcavity array layer disposed on one side surface of the transparent substrate. The microcavity array layer includes multiple microcavities arranged in an array. It also includes a solid filler filling the microcavities. The refractive index of the solid filler and the depth of the microcavities are suitable for optical interference to enable the glass assembly to exhibit structural colors. Existing chemical dye colored glass achieves color by absorbing specific wavelengths of light, inevitably resulting in a loss of light transmittance. This application, through the cooperation of the microcavities and the solid filler, provides a precise interference structure in the microcavities, ensuring that specific wavelengths are enhanced in color due to constructive interference, while other wavelengths are transmitted directly without absorption. The solid filler and the depth of the microcavities form a stable interference relationship, allowing the glass assembly to exhibit structural colors through optical interference. The synergistic effect of Fabry-Perot interference and grating diffraction enables the glass module 100 to exhibit structural colors, thereby improving the light transmittance and color aesthetics of the glass module without absorbing light. Furthermore, compared to existing glass modules with microcavities filled with liquid hydrogel, the solid-filled microcavities in this application avoid evaporation and leakage problems, extending the service life and reliability of the BIPV curtain wall. The glass module also includes a sealing layer to seal the microcavity array layer between the sealing layer and the transparent substrate. The sealing layer prevents moisture and dust from intruding and eroding the microcavity array layer and the solid filler, reducing the possibility of aging of the solid filler and damage to the microcavity structure, further improving the environmental durability of the glass module. The aforementioned glass modules and photovoltaic modules applied to BIPV curtain walls can ensure color stability and reliability while improving light transmittance.

[0016] This application also provides a photovoltaic module, including photovoltaic cells, a backsheet, and a glass module for use in BIPV curtain walls; the photovoltaic cells are disposed between the backsheet and the glass module; a first encapsulating layer is disposed between the photovoltaic cells and the backsheet; and a second encapsulating layer is disposed between the photovoltaic cells and the glass module. The photovoltaic cells are disposed between the glass module and the backsheet, with the glass module blocking outdoor moisture, dust, and ultraviolet radiation from corroding the cells, while the backsheet provides back protection and insulation, forming bidirectional protection. Simultaneously, the fluorescent material in the solid filler of the glass module can absorb and emit visible light. This visible light not only improves the total light transmittance of the glass module but is also efficiently absorbed by the photovoltaic cells, enabling ultraviolet light to not only be converted into visible light to increase transmittance but also to be converted into electrical energy by the photovoltaic cells. This achieves secondary utilization of ultraviolet light, improves the power generation efficiency of the photovoltaic module, and reduces the aging damage of ultraviolet light to the cell encapsulation materials, extending the service life of the photovoltaic module. Furthermore, the high light transmittance of the glass module ensures sufficient effective illumination for the photovoltaic cells, reducing the possibility of power generation efficiency degradation due to insufficient light transmission. The aforementioned photovoltaic modules, through their application in BIPV curtain walls, can improve power generation efficiency, reduce the possibility of power generation efficiency degradation due to insufficient light transmission, extend the service life of photovoltaic modules, and meet the weather resistance requirements of BIPV for photovoltaic modules. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is one of the structural schematic diagrams of a glass assembly provided in an embodiment of the present invention; Figure 2 This is a second schematic diagram of the structure of the glass assembly provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a photovoltaic module provided in an embodiment of the present invention.

[0019] Icons: 100-Glass module; 110-Transparent substrate; 120-Microcavity array layer; 121-Microcavity; 130-Solid filler; 140-Sealing layer; 200-Photovoltaic module; 210-Photovoltaic cell; 220-Backsheet; 230-First encapsulating layer; 240-Second encapsulating layer. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments 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, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] Please refer to Figure 1 This embodiment provides a glass assembly 100 for use in BIPV curtain walls, including a transparent substrate 110 and a microcavity array layer 120 disposed on one side surface of the transparent substrate 110. The microcavity array layer 120 includes a plurality of microcavities 121 arranged in an array. It also includes a solid filler 130 filled in the microcavities 121. The refractive index of the solid filler 130 and the depth of the microcavities 121 are suitable for optical interference to make the glass assembly 100 exhibit structural color. The glass assembly 100 also includes a sealing layer 140 to seal the microcavity array layer 120 between the sealing layer 140 and the transparent substrate 110.

[0025] Specifically, such as Figure 1As shown, the glass assembly 100 includes a transparent substrate 110, which optionally is ultra-white float glass. In one specific embodiment of this application, the ultra-white float glass has a thickness of 2.5±0.1mm. Ultra-white float glass has almost no obvious self-coloring, which can minimize the superposition interference of the transparent substrate 110's own color on the interference colors of the microcavity 121, ensuring accurate representation of the interference structure colors. Furthermore, ultra-white float glass has excellent mechanical strength and will not undergo significant warping or deformation under outdoor high and low temperatures, wind pressure impacts, etc., ensuring that key parameters such as the depth and spacing of the microcavity 121 array remain unchanged over a long period, reducing the possibility of interference condition disruption due to substrate deformation, and ensuring the overall structural stability and reliability of the glass assembly 100.

[0026] like Figure 1 As shown, a microcavity array layer 120 is disposed on one side of the glass assembly 100. The microcavity array layer 120 includes multiple microcavities 121 arranged in an array. The microcavities 121 display colors through optical interference; that is, specific wavelengths exhibit constructive interference enhancement, while other wavelengths are directly transmitted without absorption. Compared to traditional colored glass using chemical dyes, which requires the absorption of specific wavelengths and inevitably results in a loss of transmittance, this application solves the problem of existing colored glass inevitably sacrificing transmittance when improving color rendering by using the microcavity array layer 120 from an optical principle perspective. Optionally, the microcavity 121 is a cylindrical cavity. The cylindrical cavity structure ensures stable interference effects when light is incident from different angles, reducing apparent angular deflection. The cylindrical shape includes a columnar structure or a columnar structure.

[0027] The diameter of the microcavity 121 is 19-21 micrometers, for example, it can be 19 micrometers, 20 micrometers, or 21 micrometers. If the diameter is too small, the area ratio of the inner wall of the cavity will increase significantly, and additional reflections will occur on the sidewalls when light is incident, weakening the constructive interference effect of the target wavelength and causing problems such as dull colors and color shifts. If the diameter is too large, the opening area of ​​the microcavity 121 will be too large, and the solid filler 130 will easily form a depression at the cavity opening after curing, which is also not conducive to light interference. Preferably, the diameter of the microcavity 121 is 20 micrometers. It should be noted that the diameter of the microcavity 121 can be flexibly adjusted according to actual needs, and this application does not impose any restrictions on the specific diameter of the microcavity 121. When light is reflected and transmitted multiple times between the two reflective surfaces inside the microcavity 121, interference will occur. Only specific wavelengths of light that meet the constructive interference conditions will be strongly reflected, thus exhibiting color. Changing the depth of the microcavity 121 can change the color. In one specific embodiment of this application, the depth of the microcavity 121 is 195-205 nanometers. It should be noted that the depth of the microcavity 121 can be flexibly adjusted according to the actual target interference light requirements. This application does not impose any restrictions on the specific depth of the microcavity 121. The spacing between two adjacent microcavities 121 is 50 micrometers to ensure that each microcavity 121 forms an independent interference field through reflection from its upper and lower bottom surfaces. If the spacing between two adjacent microcavities 121 is too small, the interference fields of adjacent microcavities 121 may overlap, causing secondary interference between reflected light from different microcavities 121. This results in enhanced interference in some areas and cancellation of interference in others, leading to uneven local brightness and making it difficult to meet the aesthetic requirements of a large area of ​​uniform color in BIPV curtain walls. A 50-micrometer spacing between two adjacent microcavities 121 ensures that the interference effect of each microcavity 121 is independent and uniform, resulting in a continuous and uniform overall color after superposition. It should be noted that the specific spacing between two adjacent microcavities 121 can be flexibly adjusted according to actual needs. This application does not impose any restrictions on the specific spacing between two adjacent microcavities 121, as long as the interference effect of each microcavity 121 is independent and uniform.

[0028] It should be noted that, in one specific embodiment of this application, such as Figure 2 As shown, the microcavity array layer 120 is directly formed on the surface of the transparent substrate 110 through an etching process, which can realize the integrated structure of the microcavity array 121 and the substrate. This eliminates the interlayer interface gap between the substrate and the microcavity array 121, preventing outdoor moisture and dust from intruding from the interlayer and improving the durability and reliability of the glass assembly 100 when applied to BIPV curtain walls.

[0029] In another specific embodiment of this application, such as Figure 1 As shown, a UV-curable adhesive layer is disposed on the surface of the transparent substrate 110, and the microcavity array layer 120 is formed by a nanoimprinting process from the UV-curable adhesive layer. The UV-curable adhesive layer must be a high-transmittance adhesive to avoid overall performance loss due to insufficient light transmission. The nanoimprinting process for fabricating the microcavities 121 eliminates the need for direct etching of the transparent substrate 110, avoiding substrate damage during etching, improving process efficiency, and allowing for the reuse of the nanoimprint template, thus reducing the cost of large-scale production of the glass assembly 100.

[0030] like Figure 1 and Figure 2 As shown, the microcavity 121 is filled with a solid filler 130. The combination of the microcavity 121 and the solid filler 130 forms a composite optical structure that enables the glass assembly 100 to exhibit structural colors through the synergistic effect of Fabry-Perot interference and grating diffraction. The depth of the microcavity 121, the refractive index of the filling material, and the period of the microcavity 121 array together determine the target wavelength of the structural color.

[0031] Specifically, the depth d of the microcavity 121 and the refractive index n of the solid filler 130 are configured to satisfy specific optical interference conditions, such that at the target incident angle, light of a specific wavelength is enhanced by constructive interference and reflected more strongly, while light of other wavelengths is directly transmitted, thereby achieving a balance between color rendering and high transmittance.

[0032] In one specific embodiment of this application, the solid filler 130 is a cross-linked silicone resin with a refractive index n of 1.56; the depth d of the microcavity 121 is designed to be 200 nm, with the goal of reflecting blue light with a center wavelength of approximately 450 nm in the visible light range. It should be understood that the optical response of the microcavity 121 is jointly controlled by its overall structural parameters, and in actual design, parameters such as depth and period can be adapted and adjusted according to the target color.

[0033] Furthermore, compared to the existing glass assembly 100 with a microcavity 121 filled with liquid hydrogel, the solid filler 130 microcavity 121 provided in this application can avoid volatilization and leakage problems, thus extending the service life and reliability of the BIPV curtain wall.

[0034] The glass assembly 100 for BIPV curtain walls provided in this application includes a transparent substrate 110 and a microcavity array layer 120 disposed on one side surface of the transparent substrate 110. The microcavity array layer 120 includes multiple microcavities 121 arranged in an array. It also includes a solid filler 130 filled in the microcavities 121. The refractive index of the solid filler 130 and the depth of the microcavities 121 are suitable for optical interference to enable the glass assembly 100 to exhibit structural color. Existing chemical dye colored glass achieves color by absorbing specific wavelengths of light, inevitably resulting in a loss of light transmittance. In this application, through the cooperation of the microcavities 121 and the solid filler 130, the microcavities 121 provide a precise interference structure, ensuring that specific wavelengths are enhanced in color due to constructive interference, while other wavelengths are transmitted directly without absorption. The solid filler 130 and the depth of the microcavities 121 form a stable interference relationship, thereby... The glass assembly 100 exhibits structural color through the synergistic effect of Fabry-Perot interference and grating diffraction, thereby improving its light transmittance and color aesthetics without absorbing light. Furthermore, compared to existing glass assemblies 100 with microcavities 121 filled with liquid hydrogel, the solid filler 130 microcavities 121 in this application avoid evaporation and leakage problems, extending the service life and reliability of the BIPV curtain wall. The glass assembly 100 also includes a sealing layer 140 covering the surface of the microcavity array layer 120 facing away from the transparent substrate 110. The sealing layer 140 prevents moisture and dust from intruding and eroding the microcavity array layer 120 and the solid filler 130, reducing the possibility of aging of the solid filler 130 and structural damage to the microcavity 121, further improving the environmental durability of the glass assembly 100. The aforementioned glass assembly 100 and photovoltaic module 200 applied to BIPV curtain walls can improve light transmittance while ensuring color stability and reliability.

[0035] In one embodiment of this application, the solid filler 130 further includes a fluorescent material incorporated into the resin matrix, which can absorb ultraviolet light and emit visible light.

[0036] In existing technologies, ultraviolet light easily accelerates the degradation of chemical dyes and the aging of liquid fillers, reducing the service life and reliability of existing colored glass. To address this technical problem, this application also incorporates a fluorescent material in the solid filler 130. The fluorescent material is uniformly incorporated into the resin matrix to absorb ultraviolet light, reducing the intensity of ultraviolet light penetrating to the interface of the microcavity 121. This process can significantly slow down the aging rate of the silicone resin matrix and the structural degradation of the glass assembly 100, improving the environmental durability of the glass assembly 100.

[0037] In addition, in order to further improve the light transmittance of the glass module 100 and meet the light transmittance requirements of the BIPV curtain wall, the fluorescent material can convert ultraviolet light into visible light. The visible light may directly pass through the glass module 100 into the room, or act on the photovoltaic module 200 used in the glass module 100 to improve the photovoltaic absorption efficiency, thereby further improving the light transmittance of the glass module 100 and the power generation efficiency of the photovoltaic module 200 used in the glass module 100.

[0038] In one specific embodiment of this application, the ultra-white float glass, due to its high light transmittance, can ensure that the visible light emitted by the fluorescent material passes through the transparent substrate 110 without loss, avoiding the absorption of visible light caused by the substrate's own coloring, and maximizing the light transmittance improvement effect. In addition, the depth dimension of the microcavity 121 ensures stable interference colors, while the fluorescent material can convert ultraviolet light into visible light as a compensating color, forming a composite color effect with the interference colors, thus meeting the aesthetic design requirements of different building curtain walls.

[0039] Optionally, the fluorescent material is a silicate-based long-afterglow phosphor, and the resin matrix is ​​a cross-linked silicone resin matrix. Specifically, the silicate-based long-afterglow phosphor is SrAl2O4:Eu 2+ ,Dy 3+ Phosphors, specifically silicate-based long-afterglow phosphors, can absorb ultraviolet light with wavelengths of 300-400nm and emit green light in the 520nm band. This green light may directly pass through the glass module 100 into the room or act on the photovoltaic module 200 used in the glass module 100 to improve photovoltaic absorption efficiency.

[0040] The combination of microcavity 121 and solid filler 130 can present the target structural color, such as blue light with a wavelength of 450nm. The 520nm green light emitted by the silicate-based long-afterglow phosphor can combine with the blue light to form a pale cyan composite color effect, thereby reducing overall color saturation and increasing brightness. In the actual fabrication process, the brightness of the visible light emitted by the fluorescent material can be precisely controlled by the amount of fluorescent material used, avoiding overly monotonous colors. This composite effect of interference structural color and the divergent color of the fluorescent material can meet the aesthetic design requirements of different building curtain walls, differentiating it from the problems of existing colored glass with single or severely off-colors, and improving the architectural adaptability of the glass component 100.

[0041] Compared to existing chemical dye colored glass, which requires the absorption of specific visible light to develop color, resulting in decreased light transmittance and susceptibility to degradation by ultraviolet light, this application improves the color stability of the glass component 100 by setting fluorescent material in the solid filler 130. This allows the glass to absorb ultraviolet light without affecting visible light transmission, while converting ultraviolet light into visible light to increase light transmittance. Furthermore, it avoids degradation and fading issues. Furthermore, the existing colored glass with microcavities 121 containing liquid fillers is non-fluorescent, and the liquid filler is prone to aging and leakage under ultraviolet light. In contrast, the fluorescent material in this embodiment not only solves the problem of ultraviolet light-induced degradation but also improves light transmittance. At the same time, the solid filler 130 has no risk of leakage, making the weather resistance of the glass component 100 suitable for BIPV curtain wall requirements.

[0042] Optionally, the sealing layer 140 is a hydrophobic sealing layer 140, and the contact angle of the surface of the sealing layer 140 is greater than 150°.

[0043] Specifically, the sealing layer 140 is preferably a PDMS (polydimethylsiloxane) film, which has a certain degree of hydrophobicity. This material has good compatibility with the cross-linked silicone resin in the solid filler 130, and a tight fit can be achieved through a roll-coating process, reducing the risk of interlayer delamination. The sealing layer 140 is also uniformly attached to the surface of the microcavity array layer 120 facing away from the transparent substrate 110 by nanoimprinting, further reducing the possibility of the sealing layer 140 falling off. Furthermore, the thickness of the sealing layer 140 is 10-12 micrometers, for example, 10 micrometers, 11 micrometers, or 12 micrometers, minimizing the overall thickness of the glass assembly 100 and improving its adaptability to building installation.

[0044] The contact angle of the sealing layer 140 surface is greater than 150°, which means that liquid water vapor such as rainwater and dew cannot form a continuous water film on the surface of the sealing layer 140 and will not penetrate into the bonding interface between the sealing layer 140 and the microcavity array layer 120 through capillary action.

[0045] This characteristic of the sealing layer 140 can further reduce the possibility of outdoor moisture entering the microcavity 121, improve the reliability of the fluorescent material in the solid filler 130, and at the same time, the sealing layer 140 can protect the transparent substrate 110, further improve the weather resistance of the glass assembly 100, and ensure color stability.

[0046] Another aspect of the present invention, such as Figure 3 As shown, a photovoltaic module 200 is provided, including photovoltaic cells 210, a backsheet 220 and a glass module 100 for use in BIPV curtain walls; the photovoltaic cells 210 are disposed between the backsheet 220 and the glass module 100.

[0047] To further improve the structural stability and weather resistance of photovoltaic module 200, such as Figure 3As shown, a first encapsulating layer 230 can be provided between the photovoltaic cell 210 and the backsheet 220; similarly, a second encapsulating layer 240 is provided between the photovoltaic cell 210 and the glass module 100. The first encapsulating layer 230 and the second encapsulating layer 240 are made of EVA (ethylene-vinyl acetate copolymer) or POE (polyolefin elastomer). The EVA film can form a high-strength bond with the photovoltaic cell 210, preventing structural loosening caused by interlayer peeling. Furthermore, the EVA film has high visible light transmittance, matching the high light transmittance of the glass module 100, and will not additionally block incident light, ensuring that the photovoltaic cell 210 receives sufficient illumination and preventing power generation efficiency degradation due to insufficient light transmittance of the encapsulating layer. The POE film has stronger resistance to ultraviolet aging and damp heat aging, improving the weather resistance and service life of the photovoltaic module 200.

[0048] The specific structure and beneficial effects of the glass module 100 have been described in detail above and will not be repeated here. The photovoltaic cell 210 is positioned between the glass module 100 and the backsheet 220. The glass module 100 blocks outdoor moisture, dust, and ultraviolet radiation from corroding the cell, while the backsheet 220 provides back protection and insulation, forming a two-way protection system. Simultaneously, the fluorescent material in the solid filler 130 of the glass module 100 can absorb and emit visible light. This visible light not only improves the total light transmittance of the glass module 100 but is also efficiently absorbed by the photovoltaic cell 210. This allows ultraviolet light to not only be converted into visible light to increase transmittance but also to be converted into electrical energy by the photovoltaic cell 210, achieving secondary utilization of ultraviolet light, improving the power generation efficiency of the photovoltaic module 200, and reducing the aging damage of ultraviolet light to the cell encapsulation material, thus extending the service life of the photovoltaic module 200. Furthermore, the high light transmittance of the glass module 100 ensures sufficient effective illumination for the photovoltaic cell 210, reducing the possibility of power generation efficiency degradation due to insufficient light transmission.

[0049] The photovoltaic module 200, through its application in the glass module 100 of the BIPV curtain wall, can improve power generation efficiency, reduce the possibility of power generation efficiency degradation due to insufficient light transmission, extend the service life of the photovoltaic module 200, and meet the weather resistance requirements of BIPV for the photovoltaic module 200.

[0050] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0051] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A glass assembly for use in BIPV curtain walls, characterized in that, The glass assembly includes a transparent substrate and a microcavity array layer disposed on one side surface of the transparent substrate, the microcavity array layer including a plurality of microcavities arranged in an array; it also includes a solid filler filling the microcavities, the refractive index of the solid filler and the depth of the microcavities being suitable for optical interference to give the glass assembly a structural color; the glass assembly also includes a sealing layer to seal the microcavity array layer between the sealing layer and the transparent substrate.

2. The glass assembly for BIPV curtain walls according to claim 1, characterized in that, The solid filler includes a resin matrix and a fluorescent material doped within the resin matrix, wherein the fluorescent material can absorb ultraviolet light and emit visible light.

3. The glass assembly for BIPV curtain walls according to claim 1, characterized in that, The microcavity is a cylindrical cavity with a diameter of 19-21 micrometers and a depth of 195-205 nanometers. The interval between two adjacent microcavities is 50 micrometers.

4. The glass assembly for BIPV curtain walls according to claim 2, characterized in that, The fluorescent material is a silicate-based long afterglow phosphor, and the resin matrix is ​​a cross-linked silicone resin matrix.

5. The glass assembly for use in BIPV curtain walls according to claim 1, characterized in that, The microcavity array layer is formed on the surface of the transparent substrate by an etching process.

6. The glass assembly for use in BIPV curtain walls according to claim 1, characterized in that, A UV-curable adhesive layer is disposed on the surface of the transparent substrate, and the microcavity array layer is formed by the UV-curable adhesive layer through a nanoimprinting process.

7. The glass assembly for use in BIPV curtain walls according to claim 1, characterized in that, The sealing layer is a hydrophobic sealing layer, and the contact angle of the surface of the sealing layer is greater than 150°.

8. The glass assembly for use in BIPV curtain walls according to claim 1, characterized in that, The transparent substrate is ultra-white float glass.

9. The glass assembly for use in BIPV curtain walls according to claim 7, characterized in that, The thickness of the sealing layer is 10-12 micrometers.

10. A photovoltaic module, characterized in that, The device includes a photovoltaic cell, a backsheet, and a glass assembly for use in BIPV curtain walls as described in any one of claims 1-9; the photovoltaic cell is disposed between the backsheet and the glass assembly; a first encapsulating adhesive layer is disposed between the photovoltaic cell and the backsheet; and a second encapsulating adhesive layer is disposed between the photovoltaic cell and the glass assembly.

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