A photovoltaic glass

Abstract

The application discloses photovoltaic glass, relates to the photovoltaic power generation technical field, and comprises the following steps: a relatively fixed first glass substrate and a second glass substrate, the first glass substrate is used for setting towards the outdoor, and the second glass substrate is used for setting towards the indoor; perovskite thin film solar cell, perovskite thin film solar cell is arranged on the side surface of the first glass substrate towards the second glass substrate; organic thin film solar cell, organic thin film solar cell is arranged on the side surface of the second glass substrate towards the first glass substrate.The technical scheme of the application is based on two kinds of thin film preparation photovoltaic glass, which greatly reduces the thickness of photovoltaic glass compared with crystalline silicon solar cell, and the two kinds of thin film solar cell have different absorption wavelengths, which can improve the absorption wavelength range of photovoltaic glass and improve the utilization rate of light.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic power generation technology, and more specifically, to a photovoltaic glass. Background Art

[0002] Building-integrated photovoltaics (BIPV) is a technology that integrates solar power generation systems into the exterior structure of a building, aiming to provide electricity while enhancing the building's aesthetics and functionality. Among them, a mainstream product in building-integrated photovoltaic technology is photovoltaic glass.

[0003] Currently, conventional photovoltaic glass primarily utilizes crystalline silicon solar cells. Limited by the properties of silicon-based materials, these photovoltaic glass products are heavy and have a narrow absorption wavelength range, only utilizing visible and infrared light, resulting in low light utilization. Summary of the Invention

[0004] In view of this, the present application provides a photovoltaic glass, the scheme is as follows:

[0005] A photovoltaic glass comprising:

[0006] a first glass substrate and a second glass substrate fixed relatively to each other, wherein the first glass substrate is arranged to face outdoors, and the second glass substrate is arranged to face indoors;

[0007] A perovskite thin-film solar cell is provided on a surface of the first glass substrate facing the second glass substrate;

[0008] The organic thin film solar cell is arranged on a surface of the second glass substrate facing the first glass substrate.

[0009] Optionally, in the above-mentioned photovoltaic glass, the surface of the organic thin-film solar cell facing the perovskite thin-film solar cell and the surface facing the second glass substrate are respectively provided with semi-reflective and semi-transparent layers, and the two semi-reflective and semi-transparent layers are constructed into an optical micro-vibration cavity, which is used to make the light reflect multiple times between the two semi-reflective and semi-transparent layers.

[0010] Optionally, in the above photovoltaic glass, there is a gap between the perovskite thin film solar cell and the organic thin film solar cell;

[0011] The spacing is used at least for thermal isolation between the perovskite thin film solar cell and the organic thin film solar cell.

[0012] Optionally, in the above photovoltaic glass, based on the spacing, a sound insulation material is filled between the perovskite thin film solar cell and the organic thin film solar cell.

[0013] Optionally, in the photovoltaic glass, based on the spacing, there is a gas gap between the perovskite thin film solar cell and the organic thin film solar cell;

[0014] Wherein, a desiccant is further provided in the gas gap; and / or, the gas gap is filled with an inert gas.

[0015] Optionally, in the above photovoltaic glass, the spacing ranges from 10 nm to 100 nm.

[0016] Optionally, in the above photovoltaic glass, a surface of the perovskite thin-film solar cell facing the organic thin-film solar cell has a plurality of first scattering points.

[0017] Optionally, in the above photovoltaic glass, an anti-reflection layer is provided on one surface of the first glass substrate.

[0018] Optionally, the photovoltaic glass further comprises: a frame used as a window frame, the frame being used to fix and seal the first glass substrate and the second glass substrate around.

[0019] Optionally, in the above photovoltaic glass, both the perovskite thin-film solar cell and the organic thin-film solar cell can transmit part of the visible light.

[0020] From the above description, it can be seen that in the photovoltaic glass provided by the technical solution of the present application, perovskite thin-film solar cells and organic thin-film solar cells are respectively arranged on the relative first glass substrate and the second glass substrate. The two thin-film solar cells greatly reduce the thickness of the photovoltaic glass compared to the crystalline silicon solar cells, and the two thin-film solar cells have different absorption wavelengths, which can improve the absorption wavelength range of the photovoltaic glass and improve the utilization rate of light. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0022] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which this application can be implemented, and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size, without affecting the efficacy and objectives that can be achieved by this application, should still fall within the scope of the technical contents disclosed in this application.

[0023] Figure 1 A schematic structural diagram of a photovoltaic glass provided in an embodiment of the present application;

[0024] Figure 2 A schematic structural diagram of another photovoltaic glass provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of another photovoltaic glass provided in an embodiment of the present application;

[0026] Figure 4 A schematic structural diagram of another photovoltaic glass provided in an embodiment of the present application;

[0027] Figure 5 A schematic structural diagram of another photovoltaic glass provided in an embodiment of the present application;

[0028] Figure 6 A schematic structural diagram of another photovoltaic glass provided in an embodiment of the present application;

[0029] Figure 7 for Figure 6 A top view of a surface of a first glass substrate in the photovoltaic glass on which a perovskite thin-film solar cell is provided;

[0030] Figure 8 for Figure 6 A top view of a surface of a second glass substrate in the photovoltaic glass on which an organic thin-film solar cell is provided;

[0031] Figure 9 A schematic structural diagram of another photovoltaic glass provided in an embodiment of the present application;

[0032] Figure 10 for Figure 9 A top view of a surface of a first glass substrate in the photovoltaic glass on which a perovskite thin-film solar cell is provided;

[0033] Figure 11 This is a schematic structural diagram of another photovoltaic glass provided in an embodiment of the present application.

[0034] Reference numerals:

[0035] D-spacing; 11-first glass substrate; 12-second glass substrate; 13-perovskite thin-film solar cell; 131-first strip-shaped thin-film solar cell; 14-organic thin-film solar cell; 141-second strip-shaped thin-film solar cell; 15-semi-reflective and semi-transmissive layer; 16-packaging glue; 17-sound insulation material; 18-first scattering network; 19-second scattering network; 20-frame. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0038] refer to Figure 1 , Figure 1 This is a schematic structural diagram of a photovoltaic glass provided in an embodiment of the present application, the photovoltaic glass comprising:

[0039] A first glass substrate 11 and a second glass substrate 12 are relatively fixed, wherein the first glass substrate 11 is arranged to face outdoors, and the second glass substrate 12 is arranged to face indoors;

[0040] A perovskite thin-film solar cell 13 is provided on a surface of the first glass substrate 11 facing the second glass substrate 12;

[0041] The organic thin film solar cell 14 is disposed on a surface of the second glass substrate 12 facing the first glass substrate 11 .

[0042] The photovoltaic glass provided in the embodiments of this application can be used as roofs, walls, and windows of buildings. Photovoltaic glass used in buildings can provide power to the building's power supply system based on the integrated thin-film solar cells. This not only effectively utilizes solar energy to provide clean energy for the building, but also improves the building's aesthetics and functionality.

[0043] Since the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14 are both thin-film solar cells, the thickness of the thin-film solar cell can be reduced to a few microns to tens of microns, while the thickness of the crystalline silicon solar cell is at least tens of microns to hundreds of microns. Therefore, when the thickness of the glass substrate is the same, the sum of the thickness of the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14 in the embodiment of the present application is much smaller than the thickness of the transistor solar cell, which can greatly reduce the thickness of the photovoltaic glass.

[0044] Conventional crystalline silicon solar cells are heavy and rigid, and can only form flat-plate photovoltaic modules based on two-dimensional flat glass. Photovoltaic glass based on crystalline silicon is not only heavy, but also cannot be used to prepare three-dimensional photovoltaic glass.

[0045] In the embodiments of the present application, since both the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14 are thin-film solar cells, they have the advantages of being thin and flexible, and thus have little impact on the thickness and weight of the glass substrate. Consequently, the weight and thickness of the resulting photovoltaic glass are relatively small. Furthermore, the thin-film solar cell can be directly attached to the surface of the glass substrate. This allows for attachment not only to the surface of two-dimensional flat glass to produce two-dimensional flat photovoltaic glass, but also to the surface of three-dimensional glass substrates (such as bowed glass, spherical glass, and curved glass), facilitating the production of three-dimensional photovoltaic glass.

[0046] In addition, the wavelength range absorbed by crystalline silicon solar cells for photoelectric conversion is visible light and near-infrared light. The absorbable wavelength range is narrow and the utilization rate of sunlight is low.

[0047] The photovoltaic glass provided in the embodiment of the present application integrates a perovskite thin-film solar cell 13 and an organic thin-film solar cell 14. The wavelength range absorbed by the perovskite thin-film solar cell 13 for photoelectric conversion includes ultraviolet light and visible light, and the wavelength range absorbed by the perovskite thin-film solar cell 13 includes 300nm-800nm. The wavelength range absorbed by the organic thin-film solar cell 14 for photoelectric conversion includes visible light and near-infrared light, and the wavelength range absorbed by the organic thin-film solar cell 14 includes 400nm-1000nm. The remaining light that cannot be absorbed by the perovskite thin-film solar cell 13 can pass through the perovskite thin-film solar cell 13 and then be absorbed by the organic thin-film solar cell 14 for photoelectric conversion. This allows the photovoltaic glass to use not only visible light and near-infrared light for photovoltaic power generation, but also ultraviolet light for photovoltaic power generation. This increases the wavelength range absorbed by the photovoltaic glass and can improve the utilization rate of light by the photovoltaic glass.

[0048] The wavelength of ultraviolet light ranges from 10 nm to 400 nm. The perovskite thin-film solar cell 13 can absorb ultraviolet light in a certain wavelength band. Due to the relatively weak penetration of ultraviolet light, the remaining ultraviolet light that cannot be absorbed by the perovskite thin-film solar cell 13 can be blocked by the perovskite thin-film solar cell 13, thereby allowing the perovskite thin-film solar cell 13 to be reused as an ultraviolet filter element for the organic thin-film solar cell 14, thereby reducing ultraviolet light damage to the organic thin-film solar cell 14.

[0049] Based on the high absorption rate of the perovskite thin-film solar cell 13 in the ultraviolet band and the high absorption rate of the organic thin-film solar cell 14 in the visible light band and the near-infrared band, the photovoltaic glass can absorb and utilize a wider spectrum of incident light.

[0050] The photovoltaic glass provided in the embodiment of the present application can not only utilize the complementarity of the absorption wavelength ranges of the perovskite thin-film solar cells 13 close to the outdoors and the organic thin-film solar cells 14 close to the indoors to improve the absorption wavelength range of the photovoltaic glass, but also can use the perovskite thin-film solar cells 13 as ultraviolet filtering elements for the organic thin-film solar cells 14 based on the high absorption characteristics of the perovskite thin-film solar cells 13 in the ultraviolet band to reduce the radiation damage to the organic thin-film solar cells 14 caused by ultraviolet light in the outdoor incident sunlight, thereby improving the service life of the organic thin-film solar cells 14.

[0051] Moreover, the visible light and near-infrared light that are not absorbed and utilized by the perovskite thin-film solar cell 13 can be further absorbed and utilized by the organic thin-film solar cell 14, so as to further improve the utilization rate of the photovoltaic glass for visible light and near-infrared light.

[0052] It is easy to know that the organic thin-film solar cell 14 will cause the internal organic active layer to degrade and fail, thereby affecting the service life of the organic thin-film solar cell 14. In the embodiment of the present application, the organic thin-film solar cell 14 is arranged on the side of the photovoltaic glass close to the indoor room, and the perovskite thin-film solar cell 13 is arranged on the side of the photovoltaic glass close to the indoor room. The characteristic of the perovskite thin-film solar cell 13 that can absorb ultraviolet light for photovoltaic power generation can be utilized to absorb ultraviolet light in the external incident sunlight, and the perovskite thin-film solar cell 13 can be reused as an ultraviolet filter element of the organic thin-film solar cell 14 to reduce the impact of ultraviolet light on the organic active layer in the organic thin-film solar cell 14. While increasing the wavelength absorption range of the photovoltaic glass, the service life of the organic thin-film solar cell 14 can be increased.

[0053] The perovskite thin-film solar cell 13 comprises two transparent electrodes stacked on the surface of the first glass substrate 11, and a perovskite active layer located between the two transparent electrodes. The use of transparent electrodes in the perovskite thin-film solar cell 13 not only allows it to utilize outdoor sunlight incident from one side of the first glass substrate 11, but also provides a certain degree of transparency, facilitating the production of transparent photovoltaic glass.

[0054] The organic thin-film solar cell 14 includes two layers of transparent electrodes stacked on the surface of the second glass substrate 12, and an organic active layer located between the two layers of transparent electrodes. The use of transparent electrodes in the organic thin-film solar cell 14 not only provides a certain degree of transparency for the production of transparent photovoltaic glass, but also enables the organic thin-film solar cell 14 to absorb and utilize indoor light on the side facing the indoor space, based on the transparent second glass substrate and a layer of transparent electrodes. This allows the organic thin-film solar cell 14 to utilize not only outdoor sunlight incident from the first glass substrate 11 side through the perovskite thin-film solar cell 13, but also indoor light, thereby improving light utilization.

[0055] refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of another photovoltaic glass provided in an embodiment of the present application. Based on any of the above embodiments, Figure 2 In the photovoltaic glass shown, the surface of the organic thin-film solar cell 14 facing the perovskite thin-film solar cell 13 and the surface facing the second glass substrate 12 are respectively provided with a semi-reflective and semi-transparent layer 15. The two layers of semi-reflective and semi-transparent layers 15 and the organic thin-film solar cell 14 are constructed into an optical micro-vibration cavity, which is used to make the light reflect multiple times between the two layers of semi-reflective and semi-transparent layers 15.

[0056] Outdoor sunlight not utilized by the perovskite thin-film solar cell 13 and indoor light incident from the second glass substrate 12 can be reflected multiple times between the two semi-reflective and semi-transmissive layers 15, with each reflection causing a portion of the light to be absorbed by the organic thin-film solar cell 14. This embodiment not only improves the organic thin-film solar cell 14's absorption of outdoor sunlight, but also effectively utilizes weaker indoor scattered light, lamplight, and sunlight incident from the second glass substrate 12, thereby improving the photovoltaic glass's light utilization rate.

[0057] Based on the above description, we can see that Figure 2 In the illustrated embodiment, two semi-reflective and semi-transmissive layers 15 are constructed as an optical micro-resonance cavity, so that incident light can be reflected multiple times between the optical micro-resonance cavities, thereby improving the utilization rate of infrared light and visible light by the organic thin film solar cell 14.

[0058] refer to Figure 3 , Figure 3 A schematic diagram of the structure of another photovoltaic glass provided in the embodiment of the present application, based on any of the above embodiments, Figure 3 In the photovoltaic glass shown, there is a distance D between the perovskite thin film solar cell 13 and the organic thin film solar cell 14 ; the distance D is at least used for thermal isolation between the perovskite thin film solar cell 13 and the organic thin film solar cell 14 .

[0059] If the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14 are in direct contact, heat crosstalk will occur between the two, and the heat dissipation of the two thin-film solar cells will not be utilized. A distance D is set between the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14. Based on this distance D, the thermal isolation between the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14 can at least be improved, thereby preventing thermal crosstalk between the two thin-film solar cells and ensuring the heat dissipation efficiency of the two thin-film solar cells.

[0060] Optionally, the distance D between the perovskite thin film solar cell 13 and the organic thin film solar cell 14 is in the range of 10nm to 100nm. If the distance D is too large, it will not only cause the thickness of the photovoltaic glass to be too large, but also cause scattering and energy loss of the light incident on the photovoltaic glass, affecting the light utilization rate of the photovoltaic glass. In the embodiment of the present application, the distance D is set to a range of 10nm to 100nm. While maintaining an appropriate distance and avoiding the excessive thickness of the photovoltaic film, it is also convenient to help the photovoltaic glass dissipate heat, thereby better achieving thermal isolation between the perovskite thin film solar cell 13 and the organic thin film solar cell 14.

[0061] In the embodiment of the present application, the edges around the relative surfaces of the first glass substrate 11 and the second glass substrate 12 are sealed and fixed by the packaging glue 16. While bonding and fixing the first glass substrate 11 and the second glass substrate 12, it can also prevent water and oxygen from corroding the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14, thereby ensuring the service life of the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14.

[0062] In the embodiment of the present application, the sound insulation performance of the photovoltaic glass can be improved based on the distance D between the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14.

[0063] In one embodiment of the present application, based on the distance D, there is a gas gap between the perovskite thin film solar cell 13 and the organic thin film solar cell 14; wherein a desiccant is also provided in the gas gap; and / or the gas gap is filled with an inert gas.

[0064] If a desiccant is provided in the air gap, the desiccant can be fixed to the inner surface of any glass substrate or any surface of the thin-film solar cell, or fixed to the inner sidewall of the encapsulant 16. The desiccant can absorb moisture in the air gap and moisture intruding from the external environment, thereby improving the weather resistance of the thin-film solar cell and enhancing the use of the thin-film solar cell.

[0065] If the gas gap is filled with an inert gas, the sound insulation effect of the photovoltaic glass can be improved. Optionally, the inert gas can be argon, which has a low density and can effectively reduce the propagation of sound waves, thereby improving the isolation effect.

[0066] refer to Figure 4 , Figure 4 A structural schematic diagram of another photovoltaic glass provided in an embodiment of the present application. Based on the above embodiment, if there is a distance D between the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14, a sound insulation material 17 can be provided between the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14 to improve the sound insulation effect of the photovoltaic glass.

[0067] Optionally, the sound insulation material can be PVB (polyvinyl butyral) material. When PVB material is used as the sound insulation material for photovoltaic glass filling, it can not only improve the sound insulation effect of the photovoltaic glass, but also effectively improve the weather resistance of the photovoltaic glass due to the high tensile strength, impact resistance, transparency, cold resistance, water resistance, heat resistance and aging resistance of PVB material, thereby ensuring the strength and transparency of the photovoltaic glass.

[0068] In the embodiment of the present application, the sound insulation material filled between the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14 is not limited to PVB material, but can also be mineral wool and toilet paper foam, etc. The embodiment of the present application does not limit the sound insulation material.

[0069] refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of another photovoltaic glass provided in an embodiment of the present application. Based on the above embodiment, the surface of the perovskite thin-film solar cell 13 facing the organic thin-film solar cell 14 has a plurality of first scattering dots 18. The first scattering dots 18 allow light not absorbed by the perovskite thin-film solar cell 13 to be more evenly irradiated onto the organic thin-film solar cell 14, thereby ensuring uniform photovoltaic power generation efficiency across different regions of the organic thin-film solar cell 14.

[0070] The first scattering dots 18 can be light-transmitting protrusions formed by a light-transmitting adhesive. To enhance the light scattering effect of the first scattering dots 18, a plurality of light-transmitting particles having a different refractive index from that of the light-transmitting adhesive are dispersed within the light-transmitting protrusions. Optionally, the light-transmitting particles can be glass particles.

[0071] In any of the above embodiments, the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14 can be entire thin-film solar cells. The first glass substrate 11 and the second glass substrate 12 each include a central region and a sealing region surrounding the central region. The sealing regions of the two glass substrates are sealed and fixed by a packaging adhesive 16. The perovskite thin-film solar cell 13 can entirely cover the central region of the first glass substrate 11, and the organic thin-film solar cell 14 can entirely cover the central region of the second glass substrate 12.

[0072] In one embodiment of the present application, both the perovskite thin film solar cell 13 and the organic thin film solar cell 14 can transmit some visible light. In this embodiment, the thin film solar cell can use a transparent electrode to make the thin film solar cell have a certain degree of transparency with respect to visible light.

[0073] For applications requiring transparency, photovoltaic glass needs to balance transparency and power generation capacity. For example, when used as glass on windows, how to maintain the transparency of the windows while achieving high photoelectric conversion efficiency is an urgent problem to be solved. Conventional crystalline silicon photovoltaic glass is limited by the crystalline silicon material. Not only is its structure relatively thick, but it also cannot meet the requirements of transparent use. This limits the use of photovoltaic glass in certain application scenarios that require flexible or lightweight structures. Although the stacking of crystalline silicon solar cells and perovskite thin-film solar cells can improve power generation efficiency, the opacity of silicon materials still cannot meet the demand for transparent windows.

[0074] In the embodiment of the present application, the photovoltaic glass is prepared based on the relatively arranged perovskite thin-film solar cells 13 and the organic thin-film solar cells 14. The two thin-film solar cells not only enable the photovoltaic glass to have a certain degree of transparency, allowing the photovoltaic glass to be used in applications requiring transparency, but also, based on the advantages of thin-film solar cells being thin and light, the photovoltaic glass has a thin thickness and a light weight, which facilitates the installation and maintenance of the photovoltaic glass and reduces the temperature cost and difficulty. The perovskite thin-film solar cells 13 and the organic thin-film solar cells 14 absorb different light wave ranges for photoelectric conversion, which can increase the wavelength range absorbed by the photovoltaic glass.

[0075] Based on the lightness and flexibility of thin-film solar cells, the two types of thin-film solar cells are not limited to being set on the surface of a two-dimensional flat glass substrate to form two-dimensional photovoltaic glass, but can also be set on the surface of a three-dimensional glass substrate to form three-dimensional photovoltaic glass, giving the photovoltaic glass a richer and more diverse appearance, ensuring its overall harmony with the building.

[0076] Although both the perovskite thin film solar cell 13 and the organic thin film solar cell 14 can have a certain degree of transparency, they are limited by their photovoltaic power generation needs. The perovskite active layer used for photoelectric conversion between the two transparent electrodes in the perovskite thin film solar cell 13 and the organic active layer used for photoelectric conversion between the two transparent electrodes in the organic thin film solar cell 14 need to have a certain thickness, which results in low transparency of the two thin film solar cells. In addition, the transparent electrodes also have a certain absorption of light. Therefore, the transparency of general thin film solar cells is 30%~40%. The transparency will be further reduced after the two thin film solar cells are stacked. In order to make the photovoltaic glass have better transparency, the structure of the photovoltaic glass can be as follows: Figure 6-Figure 8 shown.

[0077] refer to Figure 6-Figure 8 , Figure 6 This is a schematic diagram of the structure of another photovoltaic glass provided in an embodiment of the present application. Figure 7 for Figure 6 A top view of a surface of a first glass substrate in the photovoltaic glass on which a perovskite thin film solar cell is provided, Figure 8 for Figure 6 A top view of a surface of a second glass substrate in the photovoltaic glass on which an organic thin-film solar cell is disposed.

[0078] Based on any of the above implementations, Figure 6-Figure 8 In the illustrated embodiment, the perovskite thin-film solar cell 13 includes a plurality of first strip-shaped thin-film solar cells 131 arranged in parallel, with a preset distance between each other. The organic thin-film solar cell 14 includes a plurality of second strip-shaped thin-film solar cells 141 arranged in parallel, with a preset distance between each other. The first strip-shaped thin-film solar cells 131 and the second strip-shaped thin-film solar cells 141 are arranged opposite each other, with the preset distance between them. This allows the photovoltaic glass to form a louver structure.

[0079] The photovoltaic glass has a lower transparency in the area facing the first strip thin-film solar cell 131 and the second strip thin-film solar cell 141 (the first area), and has a lower transmittance to visible light or even no visible light; the photovoltaic glass has a higher transparency in the area facing the preset distance between the two thin-film solar cells (the second area), without being blocked by the thin-film solar cells, and has a higher transmittance to visible light. Figure 6-Figure 8 The method shown can be used as a blind.

[0080] exist Figure 6-Figure 8In the method shown, since higher transparency can be achieved through the second region to transmit visible light, the transparency of the first region can be lower. Based on the fact that the active layer in the two thin-film solar cells can reduce the transparency to visible light, the photoelectric conversion efficiency of the thin-film solar cell can be improved.

[0081] Optional, in Figure 6-Figure 8 In the illustrated embodiment, the first scattering points 18 provided on the surface of the perovskite thin film solar cell 13 can improve light scattering so that the light is more evenly irradiated onto the surface of the organic thin film solar cell 14 .

[0082] refer to Figure 9 and Figure 10 , Figure 9 This is a schematic diagram of the structure of another photovoltaic glass provided in an embodiment of the present application. Figure 10 for Figure 9 The top view of the surface of one side of the photovoltaic glass where the first glass substrate is provided with a perovskite thin film solar cell is shown. Based on the above embodiment, Figure 9 and Figure 10 In the photovoltaic glass shown, a plurality of second scattering dots 19 are provided on the surface of the first glass substrate facing the organic thin-film solar cells 14 . The second scattering dots 19 are located in the region between the second strip-shaped thin-film solar cells 141 .

[0083] The second scattering dots 19 have high transparency and will not affect the transparency of the second area. The second scattering dots 19 can also scatter the sunlight incident from the second area to the second area to illuminate the second strip-shaped thin-film solar cells 141, thereby improving the utilization rate of the photovoltaic glass for the sunlight in the second area.

[0084] The second scattering dots 19 can be light-transmitting protrusions formed by a light-transmitting adhesive. To enhance the light scattering effect of the second scattering dots 19, a plurality of light-transmitting particles having a different refractive index from that of the light-transmitting adhesive are dispersed within the light-transmitting protrusions. Optionally, the light-transmitting particles can be glass particles.

[0085] In any embodiment of the present application, an antireflection layer is provided on one side of the first glass substrate 11 to increase the incidence of outdoor sunlight on the photovoltaic glass and improve the utilization rate of sunlight. The antireflection film is not shown in the drawings of the present application.

[0086] Optionally, the anti-reflection layer may be disposed on a surface of the first glass substrate 11 facing away from the perovskite thin-film solar cell 13 , or may be disposed between the first glass substrate 11 and the perovskite thin-film solar cell 13 .

[0087] refer to Figure 11 , Figure 11This is a schematic diagram of the structure of another photovoltaic glass provided in an embodiment of the present application. Based on any of the above embodiments, Figure 11 The photovoltaic glass shown also includes a frame 20 used as a window frame. The frame 20 is used to securely seal the first glass substrate 11 and the second glass substrate 12. In this manner, the frame 20 that seals and secures the two glass substrates can be used as a window frame, and the photovoltaic glass can be fixedly installed on a building window through the window frame.

[0088] From the above description, it can be seen that the photovoltaic glass provided in the embodiments of the present application has at least the following advantages:

[0089] a. A relative perovskite thin-film solar cell 13 and an organic thin-film solar cell 14 are provided between the first glass substrate 11 and the second glass substrate 12. The perovskite thin-film solar cell 13 and the organic thin-film solar cell 14 have different absorption wavelength ranges, which improves the utilization range of the light spectrum, can improve the utilization rate of light by the photovoltaic glass, and improve the photoelectric conversion efficiency.

[0090] b. The perovskite thin film solar cell 13 has a high absorption rate in the ultraviolet band, which can improve the absorption rate of the photovoltaic glass to the incident outdoor sunlight, especially to the ultraviolet light.

[0091] c. The organic thin film solar cell 14 has a strong absorption rate in the visible light to near infrared light band, which allows the photovoltaic glass to more effectively utilize the other parts of the incident light with lower absorption rate of the perovskite thin film solar cell 13, thereby improving the overall power generation efficiency.

[0092] d. The different absorption wavelength range characteristics of the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14 can be utilized to achieve complementary absorption of light, improve the utilization efficiency of the incident light, and thus improve the power generation efficiency of the photovoltaic glass.

[0093] e. The perovskite thin film solar cell 13 can be reused as an ultraviolet filter element of the organic thin film solar cell 14, reducing the radiation damage of the organic active layer of the organic thin film solar cell 14 by the incident outdoor sunlight, thereby increasing the service life of the organic thin film solar cell 14.

[0094] f. Sound insulation can be designed based on the reserved spacing D between the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14. This spacing D can be filled with sound insulation material or a low-density inert gas to improve the sound insulation performance of the photovoltaic glass. This spacing D can also be filled with a desiccant or inert gas to create a stable operating environment within the photovoltaic glass, improving weather resistance and extending the service life of the thin-film solar cell.

[0095] g. Based on the transparency of the organic thin-film solar cell 14 toward the indoor side, the organic thin-film solar cell 14 can utilize the light incident on the photovoltaic glass indoors. The organic thin-film solar cell 14 can not only utilize the remaining outdoor sunlight after being absorbed by the perovskite thin-film solar cell 13, but also utilize the light incident on the indoors, thereby further improving the utilization rate of light and the photoelectric conversion efficiency, and increasing the practicality of the photovoltaic glass.

[0096] h. Both the perovskite thin-film solar cell 13 and the organic thin-film solar cell 14 are thin, lightweight, and highly flexible thin-film solar cells that can be directly bonded to corresponding glass substrates, with minimal impact on the thickness and weight of the glass substrates, resulting in thinner and lighter photovoltaic glass.

[0097] i. Based on the good flexibility of thin-film solar cells, they can be bonded and fixed to three-dimensional glass substrates to prepare three-dimensional photovoltaic glass. They can be used on the surfaces of buildings with various surface structures. This can make the photovoltaic glass and architectural aesthetics harmonious and unified, facilitate the realization of various exterior designs of buildings, and improve the aesthetic appearance of buildings.

[0098] j. Photovoltaic films based on thin-film solar cells have a thinner thickness and lighter weight. By optimizing the structural design and material selection, the complexity and cost of installation and maintenance of photovoltaic glass can be reduced, making photovoltaic glass easier to manage and maintain.

[0099] k. Photovoltaic glass adopts a multi-layer stacked sealing design, which can better adapt to changes in the external environment and reduce the impact of climate factors such as temperature and humidity on battery performance.

[0100] Buildings using the photovoltaic glass provided in the embodiments of this application can utilize sunlight to generate electricity on a portion of their surface area, providing clean photovoltaic power to the building's internal power supply system. This reduces reliance on traditional non-renewable energy sources, helping to reduce carbon emissions and environmental pollution. Furthermore, it can improve the building's ability to self-sufficient in electricity and reduce its reliance on external power grids.

[0101] The various embodiments in this specification are described in a progressive, parallel, or combined manner. Each embodiment focuses on the differences from other embodiments, and reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For relevant parts, refer to the description of the methods.

[0102] It should be noted that in the description of this application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a centrally located component.

[0103] It should also be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the article or device comprising the aforementioned elements.

[0104] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A photovoltaic glass, characterized in that: include: A first glass substrate and a second glass substrate are relatively fixed, wherein the first glass substrate is arranged to face outdoors, and the second glass substrate is arranged to face indoors; A perovskite thin-film solar cell, wherein the perovskite thin-film solar cell is arranged on a surface of the first glass substrate facing the second glass substrate; an organic thin-film solar cell, the organic thin-film solar cell being disposed on a surface of the second glass substrate facing the first glass substrate; A surface of the perovskite thin film solar cell facing the organic thin film solar cell has a plurality of first scattering points.

2. The photovoltaic glass according to claim 1, characterized in that: The surfaces of the organic thin-film solar cell facing the perovskite thin-film solar cell and the second glass substrate are respectively provided with semi-reflective and semi-transparent layers, and the two layers of the semi-reflective and semi-transparent layers are constructed into an optical micro-vibration cavity, which is used to make light reflect multiple times between the two layers of the semi-reflective and semi-transparent layers.

3. The photovoltaic glass according to claim 1, characterized in that: There is a distance between the perovskite thin film solar cell and the organic thin film solar cell; The distance is at least used for thermal isolation between the perovskite thin-film solar cell and the organic thin-film solar cell.

4. The photovoltaic glass according to claim 3, characterized in that: Based on the distance, a sound insulation material is filled between the perovskite thin film solar cell and the organic thin film solar cell.

5. The photovoltaic glass according to claim 3, characterized in that: Based on the distance, there is a gas gap between the perovskite thin film solar cell and the organic thin film solar cell; Wherein, a desiccant is further provided in the gas gap; and / or, the gas gap is filled with an inert gas.

6. The photovoltaic glass according to claim 3, characterized in that: The spacing ranges from 10 nm to 100 nm.

7. The photovoltaic glass according to claim 1, characterized in that: An anti-reflection layer is provided on one side surface of the first glass substrate.

8. The photovoltaic glass according to claim 1, characterized in that: Also includes: The frame is used as a window frame, and is used to fix and seal the first glass substrate and the second glass substrate around.

9. The photovoltaic glass according to claim 1, characterized in that: The perovskite thin film solar cell and the organic thin film solar cell are both capable of transmitting a portion of visible light.

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