High-imitation double-silver energy-saving cadmium telluride power generation glass

Abstract

The invention relates to the technical field of building integrated photovoltaics, and particularly discloses high-imitation double-silver energy-saving cadmium telluride power generation glass which is of a film-coated interlayer hollow glass structure and comprises outer-layer tempered glass, a second-face sunlight film, a transparent PVB film layer, a cadmium telluride photoelectric material layer, a re-film-coated interlayer, inner-layer tempered glass and an argon-filled aluminum strip. The defects of the cadmium telluride photovoltaic glass in the aspects of visual effect, light transmission and curtain wall coordination are overcome, the power generation efficiency is improved, the application of the cadmium telluride photovoltaic glass in the fields of building curtain walls and the like is expanded, and attractiveness, functionality and energy conservation are considered.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic building integration, and more specifically, to a high-imitation double-silver energy-saving cadmium telluride power generation glass. Background Art

[0002] Building-integrated photovoltaic (BIPV) products are an innovative application that deeply integrates solar power generation technology with architectural design. It not only meets energy needs, but also takes into account the aesthetics and functionality of the building. As one of the key materials in BIPV, cadmium telluride power generation glass mainly converts sunlight into electrical energy by coating a cadmium telluride photovoltaic material layer about four microns thick on the glass surface, using the photoelectric effect of cadmium telluride. As a direct bandgap semiconductor, cadmium telluride has good photoelectric conversion characteristics. When sunlight shines on cadmium telluride materials, photons interact with electrons in the material, causing electrons to jump from the valence band to the conduction band, forming free electrons and holes, which in turn generate current and realize the conversion of light energy into electrical energy.

[0003] At present, although there is a gap in photoelectric conversion efficiency between cadmium telluride technology and mature crystalline silicon technology, its theoretical efficiency limit is 32%, which is higher than the 29.1% of crystalline silicon solar cells. Although the conversion efficiency of cadmium telluride photovoltaic cells in laboratories and commercial mass production is relatively low, with a gap of about 5 percentage points, the cost of cadmium telluride materials is relatively low, and there is still a lot of room for technological development. In the future, it is possible to improve its conversion efficiency and further reduce costs through technological breakthroughs. Unlike crystalline silicon technology, which has already approached its theoretical efficiency limit, cadmium telluride technology is still in a stage of continuous development and is expected to achieve greater performance improvements and cost optimization in the future.

[0004] However, there are also some inherent problems in the practical application of cadmium telluride photovoltaic glass, especially in the application of photovoltaic curtain walls. Since the light-facing surface of cadmium telluride is usually black and the overall photovoltaic glass surface is almost opaque, this limits its use in curtain wall systems. For example, when photovoltaic glass is used for building curtain walls, it can usually only be used in places with low lighting requirements, or laser etching technology is used to partially remove the cadmium telluride layer to improve light transmittance, but this method will lead to a loss of power generation efficiency. Therefore, how to solve the shortcomings of cadmium telluride photovoltaic glass in visual effects, light transmittance and overall coordination of curtain wall systems while ensuring power generation efficiency has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-imitation double-silver energy-saving cadmium telluride power generation glass, which is achieved by using an outer layer of tempered glass that adopts a float ultra-white tempered glass of specific specifications and is coated; the cadmium telluride photoelectric material layer adjusts the thickness of the cadmium telluride material and the coverage ratio of the cadmium telluride material layer through a balanced optimization model to meet the lighting needs of the building curtain wall glass while maximizing the light absorption efficiency; and the coating interlayer adjusts the transmittance to optimize the spectral distribution of the transmitted light, so that the color and brightness of the glass surface remain consistent under different lighting conditions, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A high-imitation double-silver energy-saving cadmium telluride power generation glass, adopting a coated interlayer hollow glass structure, including an outer layer of tempered glass, a second side sunlight film, a transparent PVB film layer, a cadmium telluride photoelectric material layer, a re-coated interlayer, an inner layer of tempered glass, and an argon-filled aluminum strip; the cadmium telluride photoelectric material layer is based on a balanced optimization model, and by adjusting the material thickness and coverage ratio, the light absorption efficiency is improved while maintaining the light transmittance; the re-coated interlayer optimizes the distribution of the spectrum by adjusting the light transmittance, so that the glass surface displays consistent color and brightness under different lighting conditions;

[0008] The light intensity through the re-coated interlayer is expressed as: I transmitted (λ)=T1(λ)·I0(λ), where, I transmitted (λ) is the light intensity of the transmitted light at wavelength λ, I0(λ) is the light intensity of the incident light at wavelength λ, T1(λ) is the transmittance of the sunlight control film at wavelength λ, and the weighting coefficient V(λ) represents the perceived brightness L of the transmitted light: In order to make the glass show consistent color and brightness under different lighting conditions, the transmittance T1(λ) is optimized so that transmitted (λ) condition, the perceived brightness L remains constant: The goal is to: Minimize|L actual -L desired |, where L desired The preset target perceived brightness, L actual is the actual perceived brightness. The light transmittance T1(λ) is adjusted by the film thickness d i and refractive index n i Control, the calculation formula is: Among them, R i (λ) is the reflectivity of the re-coated interlayer, α i is the light absorption capacity of the re-coated interlayer, d iis the thickness of the i-th film in the re-coating interlayer, N is the total number of films in the coating interlayer, and the reflectivity R of the re-coating interlayer i The calculation formula of (λ) is: Among them, n i is the refractive index of the i-th film, n i+1 is the refractive index of the adjacent layer.

[0009] As a further solution of the present invention, the outer layer of tempered glass has the function of protecting the inner layer structure and heat isolation. In the photovoltaic curtain wall, the outer layer of tempered glass can effectively isolate the external high temperature environment and protect the temperature stability inside the building, thereby reducing the consumption of air conditioning energy. The outer layer of tempered glass adopts 8 mm float ultra-white tempered glass, wherein float glass is a glass with a smooth surface and uniform thickness manufactured by floating and cooling on the surface of molten metal; ultra-white glass is a glass with high transparency, almost no impurities on the surface, and the light transmittance is close to 95% or more. The ultra-white glass adopts raw materials with low iron content, so that the color of the glass is more transparent and does not contain too much green tone or mixed colors. The outer layer of tempered glass has been tempered, and the tempering treatment is to heat the tempered glass to a point close to the softening point and then cool it rapidly to enhance the impact resistance of the tempered glass. The surface of the outer layer of tempered glass adopts anti-ultraviolet coating technology, which can effectively block the penetration of ultraviolet rays, protect the photovoltaic material layer from damage by ultraviolet rays, and extend the service life of the outer layer of tempered glass. In order to further improve the photoelectric conversion efficiency, a reflective coating is also used on the surface of the outer layer of tempered glass, and the reflective coating can reduce the loss of light reflected on the glass surface.

[0010] As a further solution of the present invention, the second sunlight film is a low-radiation film, namely, a Low-E film. The Low-E film is a thin film with special optical properties. The metal or metal oxide material is coated on the glass surface by coating technology to form a thin layer with high reflective properties. The thin film material can reflect far-infrared radiation while allowing visible light to pass through. Under sunlight, the temperature in the power generation glass will rise, especially in the hot summer, the heat generated by solar radiation may affect the power generation efficiency of the photovoltaic module. The Low-E film can reflect a large amount of thermal radiation, prevent heat from entering the interior of the building, maintain the stability of the temperature inside the building, and effectively isolate infrared thermal radiation. Although the Low-E film has strong thermal isolation, its light transmittance is relatively good, and most of the visible light can be allowed to pass through, thereby ensuring that the power generation efficiency of the power generation glass is not affected. By selecting a suitable film layer combination, such as the XDTG0056 film system, it can not only effectively isolate heat, but also maximize the transmittance of visible light and the light absorption capacity of the cadmium telluride photovoltaic material layer, thereby improving the photoelectric conversion efficiency. The Low-E film also has an anti-ultraviolet function, thereby extending the service life of the power generation glass.

[0011] As a further solution of the present invention, the transparent PVB film layer is a transparent plastic film used in laminated glass, and the transparent PVB film layer is composed of high-purity PVB resin and plasticizer. The transparent PVB film layer plays the role of bonding the materials between the glass layers together. Through the hot pressing process, the transparent PVB film layer firmly bonds the outer layer of ultra-white tempered glass and the inner layer of tempered glass together to form a composite structure. When the power generation glass is impacted, the transparent PVB film layer can absorb the impact energy and prevent the glass from breaking into sharp fragments. Even if the glass breaks, the PVB film layer can keep the fragments in their original position to prevent the fragments from flying and improve safety.

[0012] As a further solution of the present invention, the cadmium telluride photovoltaic material layer is designed as a sandwich structure, located between transparent PVB films. When sunlight irradiates the cadmium telluride photovoltaic material layer, photons interact with electrons in the material. After absorbing the energy of photons, electrons jump from the valence band to the conduction band to form free electron-hole pairs. The electrons and holes move in a directional manner under the action of the electric field, and finally form current, thereby realizing the conversion of solar energy into electrical energy. By establishing a balanced optimization model, the light transmittance is retained while improving the light absorption efficiency, meeting the lighting requirements of the building curtain wall glass. The steps of the balanced optimization model are:

[0013] Step S1, the propagation of sunlight in the cadmium telluride material layer follows the Lambert-Beer law: transmitted (λ)=I0(λ)·e -α(λ)·d , where λ is the wavelength of light, I transmitted (λ) is the intensity of the transmitted light at wavelength λ, I0(λ) is the intensity of the incident light at wavelength λ, α(λ) is the light absorption coefficient, and d is the thickness of the cadmium telluride material; the calculation formula for the transmittance T(λ) of sunlight in the cadmium telluride material layer is: T(λ) = e -α(λ)·d ; The calculation formula of light absorption efficiency A(λ) is: A(λ)=1-T(λ)-R(λ), where R(λ) is the reflectivity;

[0014] Step S2, combining the coverage ratio C of the cadmium telluride material layer, the calculation formula of the overall absorption efficiency and overall light transmittance of the power generation glass is: Among them, A total is the overall absorption efficiency, T total is the overall transmittance, λ1 is the starting wavelength, indicating the starting point of the spectrum, and λ2 is the ending wavelength, indicating the end point of the spectrum;

[0015] Step S3, find a balance between light absorption efficiency and light transmittance, and define the optimization objective function: Maximize:f(d,C)=w1·A total -w2·|Ttotal -T desired |, where w1 is the weight factor of light absorption efficiency, w2 is the weight factor of light transmittance, T desired is the preset target transmittance; by adjusting the thickness d of the cadmium telluride material and the coverage ratio C of the cadmium telluride material layer, the light absorption efficiency is maximized while meeting the lighting needs of the building curtain wall glass.

[0016] As a further solution of the present invention, the film material of the re-coated interlayer is a metal oxide film, including tin oxide and indium tin oxide, and the tin oxide and indium tin oxide are conductive. The film layer includes a sunlight control film layer and a double silver Low-E film layer, and the sunlight control film layer is used to adjust the light passing through the glass so that the glass surface shows consistent color and brightness under different lighting conditions. The double silver Low-E film layer is a combination of two layers of silver film and a metal oxide layer in the middle, which can reflect mid-infrared heat, reduce external heat entering the interior of the building, and reduce the burden of air conditioning.

[0017] As a further solution of the present invention, the thickness of the inner layer of tempered glass is 6 mm, and float ultra-white glass is used. The float ultra-white glass has high transparency and low iron content, thereby reducing the green tone and ensuring that the optical performance is close to the color of natural light. The float ultra-white glass is tempered and has high strength and impact resistance, and the strength is 4 to 5 times that of ordinary glass. After the tempering treatment, the glass is heat-treated to eliminate the nickel sulfide crystals in the glass and reduce the risk of self-explosion. The inner layer of tempered glass combines Low-E film and sunlight control film layer to effectively reflect mid-infrared light and reduce heat entering the room. The inner layer of tempered glass provides protection for the cadmium telluride photovoltaic material layer, and at the same time fixes the cadmium telluride layer on its outside through a transparent PVB film to ensure the stability of the photovoltaic material. The layer of tempered glass is connected to the outer layer of tempered glass through a transparent PVB film layer and a re-coating interlayer to form a double-layer structure.

[0018] As a further solution of the present invention, the argon-filled aluminum strip is responsible for sealing the air or inert gas between the glasses. The argon-filled aluminum strip is provided with an inflation hole and a sealing valve for controlling the filling and sealing of argon during the production process. The surface of the argon-filled aluminum strip is anodized to enhance the anti-oxidation and anti-corrosion properties. The argon-filled aluminum strip is a hollow rectangular frame structure, and the inside contains a desiccant for absorbing moisture in the hollow glass layer to prevent fogging. The outer surface has an air sealant and a structural adhesive coating to improve the sealing performance. The argon-filled aluminum strip is installed between the glasses by bonding or mechanical clamping, and its two sides are fixed by air sealants. The argon-filled aluminum strip is sealed to the edge of the glass by polysulfide glue or structural silicone to form a multiple sealing barrier.

[0019] The technical effects and advantages of the high-imitation double-silver energy-saving cadmium telluride power generation glass of the present invention are as follows: the outer layer of tempered glass adopts float ultra-white tempered glass of specific specifications, which is treated with anti-ultraviolet and reflective coatings to improve the photoelectric conversion efficiency while protecting the inner layer, heat insulation, impact resistance, and UV resistance. The second side sunlight film (Low-E film) effectively reflects thermal radiation, maintains light transmittance and is UV-resistant, which helps to stabilize the power generation efficiency and prolong the life. The transparent PVB film layer is firmly bonded and can buffer impact, thereby improving safety. The cadmium telluride photovoltaic material layer adjusts the thickness and coverage ratio through a balanced optimization model to maximize the light absorption efficiency while meeting the lighting requirements. The re-coating interlayer optimizes the light regulation and spectral distribution, so that the color and brightness of the glass are constant, and the double silver Low-E film layer reduces the heat entry. While providing protection and stability, the inner layer of tempered glass combines with related film layers to reduce the heat transfer into the room. The argon-filled aluminum strip ensures sealing and moisture-proofing in a variety of ways to form a multiple sealing barrier. It overcomes the shortcomings of cadmium telluride photovoltaic glass in visual effects, light transmittance and curtain wall coordination, improves power generation efficiency, expands its application in areas such as building curtain walls, and takes into account aesthetics, functionality and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a high-imitation double-silver energy-saving cadmium telluride power generation glass of the present invention.

[0021] Figure 2 This is a visual effect diagram of the high-imitation double-silver energy-saving cadmium telluride power generation glass of the present invention and other coated glass installed on the same wall. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1

[0024] See also Figure 1 As shown in the structural schematic diagram, an embodiment of the present invention provides a high-imitation double-silver energy-saving cadmium telluride power generation glass, which adopts a coated sandwich hollow glass structure, including an outer layer of tempered glass, a second side sunlight film, a transparent PVB film layer, a cadmium telluride photovoltaic material layer, a re-coated interlayer, an inner layer of tempered glass, and an argon-filled aluminum strip.

[0025] Furthermore, the outer layer of tempered glass has the function of protecting the inner layer structure and heat isolation. In the photovoltaic curtain wall, the outer layer of tempered glass can effectively isolate the external high temperature environment and protect the temperature stability inside the building, thereby reducing the consumption of air conditioning energy. The outer layer of tempered glass adopts 8 mm float ultra-white tempered glass, wherein float glass is a glass with a smooth surface and uniform thickness manufactured by floating and cooling on the surface of molten metal; ultra-white glass is a glass with high transparency, almost no impurities on the surface, and the light transmittance is close to 95% or more. The ultra-white glass adopts raw materials with low iron content, so that the color of the glass is more transparent, without too much green tone or variegated color, so as to maximize the light passing through. The outer layer of tempered glass has been tempered, and the tempering treatment is to heat the tempered glass to a point close to the softening point and then cool it rapidly to enhance the impact resistance of the tempered glass. The surface of the outer layer of tempered glass adopts anti-ultraviolet coating technology, which can effectively block the penetration of ultraviolet rays, protect the photovoltaic material layer from damage by ultraviolet rays, and extend the service life of the outer layer of tempered glass. In order to further improve the photoelectric conversion efficiency, a reflective coating is also used on the surface of the outer tempered glass. The reflective coating can reduce the loss of light reflected on the glass surface, allowing more sunlight to enter the photovoltaic material layer and enhance the overall light absorption capacity of the power generation glass.

[0026] Furthermore, the second sunlight film is a low-emissivity film, namely, a Low-E film. The Low-E film is a thin film with special optical properties. A metal or metal oxide material (such as silver, aluminum, titanium, etc.) is coated on the glass surface by coating technology to form a thin layer with high reflective properties. The thin film material can reflect far-infrared radiation while allowing visible light to pass through. Under sunlight, the temperature in the power generation glass will rise, especially in the hot summer, the heat generated by solar radiation may affect the power generation efficiency of the photovoltaic module. The Low-E film can reflect a large amount of thermal radiation, prevent heat from entering the interior of the building, maintain the stability of the temperature inside the building, and effectively isolate infrared thermal radiation. Although the Low-E film has strong thermal isolation, its light transmittance is relatively good, allowing most visible light to pass through, thereby ensuring that the power generation efficiency of the power generation glass is not affected. By selecting a suitable film layer combination, such as the XDTG0056 film system, it can not only effectively isolate heat, but also maximize the transmittance of visible light and the light absorption capacity of the cadmium telluride photovoltaic material layer, thereby improving the photoelectric conversion efficiency. The Low-E film also has an anti-ultraviolet function, thereby extending the service life of the power generation glass.

[0027] Furthermore, the transparent PVB film layer is a transparent plastic film used in laminated glass, and the transparent PVB film layer is composed of high-purity PVB resin and plasticizer. The transparent PVB film layer plays the role of bonding the materials between the glass layers together. Through the hot pressing process, the transparent PVB film layer firmly bonds the outer layer of ultra-white tempered glass and the inner layer of tempered glass together to form a composite structure. When the power generation glass is impacted, the transparent PVB film layer can absorb the impact energy and prevent the glass from breaking into sharp fragments. Even if the glass breaks, the PVB film layer can keep the fragments in place to prevent the fragments from flying and improve safety.

[0028] Furthermore, the cadmium telluride photovoltaic material layer is designed as a sandwich structure, located between transparent PVB films. When sunlight irradiates the cadmium telluride photovoltaic material layer, photons interact with electrons in the material. After absorbing the energy of photons, electrons jump from the valence band to the conduction band to form free electron-hole pairs. The electrons and holes move in a directional manner under the action of the electric field, and finally form current, thereby realizing the conversion of solar energy into electrical energy. By establishing a balanced optimization model, the light absorption efficiency is improved while the light transmittance is retained to meet the lighting needs of the building curtain wall glass. The steps of the balanced optimization model are:

[0029] Step S1, the propagation of sunlight in the cadmium telluride material layer follows the Lambert-Beer law: transmitted (λ)=I0(λ)·e -α(λ)·d , where λ is the wavelength of light, I transmitted (λ) is the intensity of the transmitted light at wavelength λ, I0(λ) is the intensity of the incident light at wavelength λ, α(λ) is the light absorption coefficient, and d is the thickness of the cadmium telluride material; the calculation formula for the transmittance T(λ) of sunlight in the cadmium telluride material layer is: T(λ) = e -α(λ)d ; The calculation formula of light absorption efficiency A(λ) is: A(λ)=1-T(λ)-R(λ), where R(λ) is the reflectivity;

[0030] Step S2, combining the coverage ratio C of the cadmium telluride material layer, the calculation formula of the overall absorption efficiency and overall light transmittance of the power generation glass is: Among them, A total is the overall absorption efficiency, T total is the overall transmittance, λ1 is the starting wavelength, indicating the starting point of the spectrum, and λ2 is the ending wavelength, indicating the end point of the spectrum;

[0031] Step S3, find a balance between light absorption efficiency and light transmittance, and define the optimization objective function: Maximize:f(d,C)=w1·A total -w2·|T total -T desired|, where w1 is the weight factor of light absorption efficiency, w2 is the weight factor of light transmittance, T desired is the preset target transmittance; by adjusting the thickness d of the cadmium telluride material and the coverage ratio C of the cadmium telluride material layer, the light absorption efficiency is maximized while meeting the lighting needs of the building curtain wall glass.

[0032] Furthermore, the film material of the re-coating interlayer is a metal oxide film, including tin oxide and indium tin oxide, and the tin oxide and indium tin oxide are conductive. The total thickness of the re-coating interlayer is in the range of 100nm-500nm. The film layer includes a sunlight control film layer and a double silver Low-E film layer, and the sunlight control film layer is used to adjust the light passing through the glass so that the glass surface shows consistent color and brightness under different lighting conditions. The light intensity passing through the re-coating interlayer is expressed as: I transmitted (λ)=T1(λ)·I0(λ), where, I transmitted (λ) is the light intensity of the transmitted light at wavelength λ, I0(λ) is the light intensity of the incident light at wavelength λ, T1(λ) is the light transmittance of the sunlight control film at wavelength λ. According to the CIE standard colorimetric system, the human eye has different sensitivities to light of different wavelengths, and the weighting coefficient V(λ) is used to represent the perceived brightness L of the transmitted light: In order to make the glass display consistent color and brightness under different lighting conditions, it is necessary to optimize the transmittance T1(λ) so that it can be displayed under different incident light intensities I transmitted (λ) condition, the perceived brightness L remains constant: The goal is to: Minimize|L actual -L desired |, where L desired is the preset target perceived brightness, L actual is the actual perceived brightness. The light transmittance T1(λ) is adjusted by the film thickness d i and refractive index n i Control, the calculation formula is: Among them, R i (λ) is the reflectivity of the re-coated interlayer, α i is the light absorption capacity of the re-coated interlayer, d i is the thickness of the i-th film in the re-coating interlayer, N is the total number of films in the coating interlayer, and the reflectivity R of the re-coating interlayer i The calculation formula of (λ) is: Among them, n i is the refractive index of the i-th film, n i+1is the refractive index of the adjacent layer. The sunlight control film optimizes the spectral distribution of the transmitted light by adjusting the transmittance T1(λ), ​​so that the color and brightness of the glass surface remain consistent under different lighting conditions. The double silver Low-E film layer is composed of two layers of silver film and a metal oxide layer in the middle, which can reflect mid-infrared heat, reduce the external heat entering the building, and reduce the burden of air conditioning.

[0033] Furthermore, the thickness of the inner layer of tempered glass is 6 mm, and float ultra-white glass is used. The float ultra-white glass has high transparency and low iron content, thereby reducing the green tone and ensuring that the optical performance is close to the color of natural light. The float ultra-white glass is tempered and has high strength and impact resistance, and its strength is 4 to 5 times that of ordinary glass. After the tempering treatment, the glass is heat-treated to eliminate the nickel sulfide crystals in the glass and reduce the risk of self-explosion. The inner layer of tempered glass combines Low-E film and sunlight control film layer to effectively reflect mid-infrared light and reduce the heat entering the room. The inner layer of tempered glass provides protection for the cadmium telluride photovoltaic material layer, and at the same time fixes the cadmium telluride layer on its outside through a transparent PVB film to ensure the stability of the photovoltaic material. The layer of tempered glass is connected to the outer layer of tempered glass through a transparent PVB film layer and a re-coating interlayer to form a double-layer structure.

[0034] Furthermore, the argon-filled aluminum strip is responsible for sealing the air or inert gas between the glass. The argon-filled aluminum strip is provided with an air filling hole and a sealing valve for controlling the filling and sealing of argon during the production process. The surface of the argon-filled aluminum strip is anodized to enhance the anti-oxidation and anti-corrosion properties. The argon-filled aluminum strip is a hollow rectangular frame structure, and the inner side contains a desiccant for absorbing moisture in the hollow glass layer to prevent fogging. The outer surface has an air sealant and a structural adhesive coating to improve the sealing performance. The width of the argon-filled aluminum strip is between 6mm-20mm, and the wall thickness is between 0.2mm-0.5mm. The argon-filled aluminum strip is installed between the glass by bonding or mechanical clamping, and its two sides are fixed by air sealants. The argon-filled aluminum strip is sealed with the edge of the glass by polysulfide glue or structural silicone to form a multiple sealing barrier.

[0035] The outer layer of tempered glass of the present invention adopts float ultra-white tempered glass of specific specifications, which is treated with anti-ultraviolet and reflective coatings to improve the photoelectric conversion efficiency while protecting the inner layer, insulating, impact-resistant and anti-ultraviolet. The second side sunlight film (Low-E film) effectively reflects thermal radiation, maintains light transmittance and is anti-ultraviolet, which helps to stabilize the power generation efficiency and prolong the life. The transparent PVB film layer is firmly bonded and can buffer impact, thereby improving safety. The cadmium telluride photovoltaic material layer adjusts the thickness and coverage ratio through a balanced optimization model to maximize the light absorption efficiency while meeting the lighting requirements. The re-coating interlayer optimizes the light regulation and spectral distribution, so that the color and brightness of the glass are constant, and the double silver Low-E film layer reduces the heat entry. While providing protection and stability, the inner layer of tempered glass combines with related film layers to reduce the heat transfer into the room. The argon-filled aluminum strip ensures sealing and moisture-proofing in a variety of ways to form a multiple sealing barrier. It overcomes the shortcomings of cadmium telluride photovoltaic glass in visual effects, light transmittance and curtain wall coordination, improves power generation efficiency, expands its application in areas such as building curtain walls, and takes into account aesthetics, functionality and energy saving.

[0036] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0037] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-imitation double-silver energy-saving cadmium telluride power generation glass, characterized in that: The coated interlayer insulating glass structure is adopted, including an outer layer of tempered glass, a second side sunlight film, a transparent PVB film layer, a cadmium telluride photoelectric material layer, a re-coated interlayer, an inner layer of tempered glass, and an argon-filled aluminum strip; the cadmium telluride photoelectric material layer is based on a balanced optimization model, and the material thickness and coverage ratio are adjusted to improve the light absorption efficiency while maintaining the light transmittance; the re-coated interlayer optimizes the distribution of the spectrum by adjusting the light transmittance, so that the glass surface displays consistent color and brightness under different lighting conditions; The light intensity through the re-coated interlayer is expressed as: I transmitted (λ)=T1(λ)·I0(λ), where, I transmitted (λ) is the light intensity of the transmitted light at wavelength λ, I0(λ) is the light intensity of the incident light at wavelength λ, T1(λ) is the transmittance of the sunlight control film at wavelength λ, and the weighting coefficient V(λ) represents the perceived brightness L of the transmitted light: In order to make the glass show consistent color and brightness under different lighting conditions, the transmittance T1(λ) is optimized so that transmitted (λ) condition, the perceived brightness L remains constant: The goal is to: Minimize|L actual -L desired |, where L desired The preset target perceived brightness, L actual is the actual perceived brightness; the light transmittance T1(λ) is adjusted by the film thickness d i and refractive index n i Control, the calculation formula is: Among them, R i (λ) is the reflectivity of the re-coated interlayer, α i is the light absorption capacity of the re-coated interlayer, d i is the thickness of the i-th film in the re-coating interlayer, N is the total number of films in the coating interlayer, and the reflectivity R of the re-coating interlayer i The calculation formula of (λ) is: Among them, n i is the refractive index of the i-th film, n i+1 is the refractive index of the adjacent layer.

2. The high-imitation double-silver energy-saving cadmium telluride power generation glass according to claim 1, characterized in that ,The steps of the balance optimization model are: Step S1, the propagation of sunlight in the cadmium telluride material layer follows the Lambert-Beer law: transmitted (λ)=I0(λ)·e -α(λ)·d , I transmitted (λ) is the intensity of the transmitted light at wavelength λ, I0(λ) is the intensity of the incident light at wavelength λ, α(λ) is the light absorption coefficient, and d is the thickness of the cadmium telluride material; the calculation formula for the transmittance T(λ) of sunlight in the cadmium telluride material layer is: T(λ) = e -α(λ)·d ; The calculation formula of light absorption efficiency A(λ) is: A(λ)=1-T(λ)-R(λ), where R(λ) is the reflectivity; Step S2, combining the coverage ratio C of the cadmium telluride material layer, the calculation formula of the overall absorption efficiency and overall light transmittance of the power generation glass is: Among them, A total is the overall absorption efficiency, T total is the overall transmittance, λ1 is the starting wavelength, indicating the starting point of the spectrum, and λ2 is the ending wavelength, indicating the end point of the spectrum; Step S3, find a balance between light absorption efficiency and light transmittance, and define the optimization objective function: Maximize:f(d,C)=w1·A total -w2·|T total -T desired |, where w1 is the weight factor of light absorption efficiency, w2 is the weight factor of light transmittance, T desired is the preset target transmittance; by adjusting the thickness d of the cadmium telluride material and the coverage ratio X of the cadmium telluride material layer, the lighting demand of the building curtain wall glass is met while maximizing the light absorption efficiency.

3. The high-imitation double-silver energy-saving cadmium telluride power generation glass according to claim 1, characterized in that The outer layer of tempered glass is 8mm float ultra-white tempered glass with a light transmittance of more than 95%. It has been tempered and treated with anti-UV coating and reflective coating.

4. The high-imitation double-silver energy-saving cadmium telluride power generation glass according to claim 1, characterized in that: The second sunlight film is a Low-E film, which uses a coating technology to coat metal or metal oxide materials on the glass surface. It can reflect far-infrared radiation, allow visible light to pass through, and resist ultraviolet rays.

5. The high-imitation double-silver energy-saving cadmium telluride power generation glass according to claim 1, characterized in that: The transparent PVB film layer is composed of PVB resin and plasticizer, and the outer layer and the inner layer of tempered glass are bonded by a hot pressing process, so as to absorb impact energy and prevent the glass from breaking and scattering.

6. The high-imitation double-silver energy-saving cadmium telluride power generation glass according to claim 1, characterized in that: The re-plating interlayer film layer material adopts a metal oxide film with a total thickness in the range of 100nm-500nm. The re-plating interlayer film layer includes a sunlight control film layer and a double silver Low-E film layer.

7. The high-imitation double-silver energy-saving cadmium telluride power generation glass according to claim 1, characterized in that: The inner layer of tempered glass is 6 mm thick and is made of float ultra-white glass that has been tempered and heat-treated. The inner layer of tempered glass is combined with a Low-E film and a sunlight control film layer to reflect mid-infrared light and provide protection for the cadmium telluride photoelectric material layer.

8. The high-imitation double-silver energy-saving cadmium telluride power generation glass according to claim 1, characterized in that: The argon-filled aluminum strip is a hollow rectangular frame structure with a width between 6mm and 20mm, a wall thickness between 0.2mm and 0.5mm, and an anodized surface. The argon-filled aluminum strip is also provided with an inflation hole and a sealing valve, and contains a desiccant inside.

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