Perovskite photovoltaic device

Abstract

The utility model provides a perovskite photovoltaic device which comprises a first substrate, a battery assembly, a packaging layer and a second substrate, the battery assembly is located between the first substrate and the second substrate, and the packaging layer is located between the battery assembly and the first substrate or the second substrate; a sealing layer is arranged along the edge of the first substrate and the edge of the second substrate, the sealing layer is arranged between the first substrate and the second substrate, a water vapor expelling layer is arranged on the periphery of the sealing layer, and the water vapor expelling layer comprises a photothermal conversion layer. Water vapor isolation packaging is carried out on the battery, the density of water vapor in an air thin layer in contact with the battery is reduced, water vapor is prevented from entering materials in the battery, and the stability of a device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaics and relates to a perovskite photovoltaic device. Background Art

[0002] With the development of photovoltaic technology, the research and development of various types of batteries has become more in-depth, making the battery technology line flourish. Perovskite batteries have become one of the most eye-catching batteries due to their low production cost and relatively simple manufacturing process.

[0003] CN105845829A discloses a perovskite solar cell, comprising an electron transport substrate, a perovskite photoactive layer, a hole transport layer and a counter electrode, wherein the electron transport substrate is selected from zinc oxide single crystals, heteroatom-doped zinc oxide single crystals, zinc oxide single crystals with microstructures on the surface, and heteroatom-doped zinc oxide single crystals with microstructures on the surface; the electron transport substrate serves as both a light-transmitting conductive material and an electron transport material; sunlight is incident from one side of the electron transport substrate into the perovskite active layer.

[0004] CN220873589U discloses a perovskite stacked solar cell structure, comprising: a perovskite bottom cell, the perovskite bottom cell comprises a first electrode layer, a first transmission layer, a first perovskite absorption layer and a second transmission layer which are stacked; a composite layer, the composite layer is arranged on a side of the second transmission layer away from the first perovskite absorption layer; a perovskite top cell, the perovskite top cell comprises a third transmission layer, a second perovskite absorption layer, a fourth transmission layer and a second electrode layer which are stacked, the third transmission layer is arranged on a side of the composite layer away from the second transmission layer, and the first transmission layer, the second transmission layer, the third transmission layer and the fourth transmission layer are inorganic metal oxides, and the first perovskite absorption layer is an all-inorganic perovskite material.

[0005] Research on the stability of existing perovskite battery devices is becoming more and more in-depth. Since the absorption layer of perovskite batteries is sensitive to water vapor, once the internal materials of perovskite batteries come into contact with water vapor and oxygen, they are prone to react, causing the device stability to deteriorate or even fail to function. Therefore, the water vapor barrier capability of perovskite devices has become a significant shortcoming and urgently needs to be improved. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a perovskite photovoltaic device, which can convert light energy into heat energy and reduce the water vapor density in the thin layer of air in contact with it, thereby preventing water vapor from invading the photovoltaic device by setting a sealing layer and a water vapor repellent layer to isolate and package the battery components.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides a perovskite photovoltaic device, which comprises a first substrate, a battery assembly, a packaging layer and a second substrate, wherein the battery assembly is located between the first substrate and the second substrate, and the packaging layer is located between the battery assembly and the first substrate or the second substrate; a sealing layer is arranged along the edge of the first substrate and the second substrate, the sealing layer is placed between the first substrate and the second substrate, a water vapor repelling layer is arranged around the outer periphery of the sealing layer, and the water vapor repelling layer comprises a light-to-heat conversion layer.

[0009] That is, the utility model provides the following three packaging layer setting schemes: (1) a packaging layer is set between the battery assembly and the first substrate; (2) a packaging layer is set between the battery assembly and the second substrate; (3) a packaging layer is set between the battery assembly and the first substrate, and between the battery assembly and the second substrate. The sealing layer is placed between the first substrate and the second substrate along the edge of the first substrate and the second substrate, sealingly connecting the first substrate and the second substrate to confine the battery assembly and the packaging layer inside, which is conducive to improving the water vapor isolation performance.

[0010] The perovskite photovoltaic device of the utility model adds a sealing layer and a water vapor repelling layer arranged around the outer peripheral edge of the battery component to form a double-layer isolation barrier. The sealing layer is used to seal the edges of the first substrate and the second substrate to prevent external water vapor from directly contacting the battery component. The arranged water vapor repelling layer converts light energy into heat energy, reduces the water vapor density in the thin layer of air in contact with it, and thereby reduces the water vapor permeability of the component, effectively improving the water vapor barrier performance of the photovoltaic device, and enhancing the packaging effect and component stability.

[0011] As a preferred technical solution of the utility model, the water vapor removal layer also includes a plurality of photothermal particles dispersedly arranged inside the photothermal conversion layer.

[0012] The total volume of several of the photothermal particles accounts for 40% to 70% of the volume of the photothermal conversion layer, for example, it can be 40%, 43%, 45%, 48%, 50%, 52%, 55%, 58%, 60%, 63%, 65%, 68% or 70%, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0013] The outer edge of the light-to-heat conversion layer is flush with the outer edge of the first substrate and / or the second substrate.

[0014] The photothermal conversion layer described in the utility model is a transparent adhesive film, which can play the role of bonding and fixing the photothermal particles. Under light irradiation, the electron or atomic vibration of the photothermal particles is significantly enhanced and converted into heat energy, so that the temperature of the water vapor expulsion layer is increased, so as to heat and dry the thin layer of air in contact with the water vapor expulsion layer at the periphery of the photovoltaic device, evaporate and drive away the water vapor, thereby reducing the water vapor density in the thin layer of air in contact with it, and reducing the water vapor from invading the inside through the side edge of the photovoltaic device.

[0015] As a preferred technical solution of the present invention, the distance between the outer edge of the encapsulation layer and the outer edge of the first substrate or the second substrate is 10 to 15 mm, for example, it can be 10 mm, 10.5 mm, 11 mm, 11.5 mm, 12 mm, 12.5 mm, 13 mm, 13.5 mm, 14 mm, 14.5 mm or 15 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0016] As a preferred technical solution of the utility model, the battery assembly includes a plurality of electrically connected sub-batteries.

[0017] The sub-cell includes a first transmission layer, a perovskite absorption layer, a second transmission layer and an internal electrode layer which are sequentially stacked from the first substrate to the second substrate.

[0018] The first transport layer and the second transport layer of the neutron battery of the present invention are different from each other and can be electron transport layers or hole transport layers.

[0019] As a preferred technical solution of the present invention, the distance between the outer edge of the sealing layer and the outer edge of the first substrate or the second substrate is 1 to 3 mm, for example, it can be 1 mm, 1.2 mm, 1.5 mm, 1.6 mm, 2 mm, 2.3 mm, 2.5 mm, 2.8 mm or 3 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0020] As a preferred technical solution of the utility model, the thickness of the sealing layer is greater than or equal to the thickness of the encapsulation layer.

[0021] The difference in thickness between the sealing layer and the encapsulation layer is 0 to 0.1 mm.

[0022] The thickness of the packaging layer is 0.5-1 mm.

[0023] As a preferred technical solution of the utility model, the encapsulation layer is an EVA adhesive layer (ethylene-vinyl acetate copolymer), a PVB adhesive layer (polyvinyl butyral), a POE adhesive layer (ethylene-octene copolymer) or a TPU adhesive layer (thermoplastic polyurethane elastomer rubber, Thermoplastic Polyurethanes).

[0024] The sealing layer is one or more of a butyl rubber layer, a silicone rubber layer or an epoxy resin layer.

[0025] It should be noted that the butyl rubber layer, silicone rubber layer and epoxy resin layer in the present invention are all materials known to those skilled in the art, and when the sealing layer is composed of the above-mentioned multiple types, the butyl rubber layer, silicone rubber layer and epoxy resin layer are stacked and exist independently of each other without any reaction between them.

[0026] The water vapor permeability of the sealing layer is less than or equal to the water vapor permeability of the encapsulation layer.

[0027] The water vapor transmission rate of the encapsulation layer in the utility model is less than 2g / m 2 ·day, the water vapor transmission rate of the sealing layer is less than 0.1g / m 2 ·day, effectively blocking the passage of water vapor.

[0028] As a preferred technical solution of the present utility model, the first substrate, the packaging layer and the sealing layer form a receiving cavity, and the battery assembly is located in the receiving cavity.

[0029] That is, the encapsulation layer completely covers the battery assembly.

[0030] A conductive layer is also provided on a surface of the first substrate or the second substrate on a side close to the battery assembly.

[0031] In the utility model, a layer of transparent conductive oxide commonly used by those skilled in the art is sputtered on the surface of the first substrate or the second substrate to form a conductive layer, which is used as the conductive layer of the battery component.

[0032] As a preferred technical solution of the present invention, the first substrate is ultra-clear non-tempered glass, and the second substrate is tempered glass.

[0033] The thickness of the first substrate is 2.5 to 3.2 mm, for example, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, 3.1 mm or 3.2 mm, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0034] The thickness of the second substrate is 2 to 4 mm, for example, it can be 2 mm, 2.1 mm, 2.2 mm, 2.5 mm, 2.6 mm, 2.8 mm, 3 mm, 3.2 mm, 3.5 mm, 3.6 mm, 3.8 mm or 4 mm, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0035] As a preferred technical solution of the utility model, the encapsulation layer includes a first encapsulation layer and a second encapsulation layer, the first encapsulation layer is located between the battery assembly and the first substrate, the second encapsulation layer is located between the battery assembly and the second substrate, and a junction box is also provided on the side of the second substrate away from the first substrate.

[0036] The numerical range described in the present invention not only includes the point values ​​listed above, but also includes any point values ​​between the above numerical ranges that are not listed. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values ​​included in the range.

[0037] Compared with the prior art, the beneficial effects of the utility model are:

[0038] The utility model provides a perovskite photovoltaic device, which adds a sealing layer and a water vapor repelling layer arranged around the outer peripheral edge of the battery component to form a double-layer isolation barrier. The sealing layer is used to seal the edges of the first substrate and the second substrate to prevent external water vapor from directly contacting the battery component. The water vapor repelling layer converts light energy into heat energy, reduces the water vapor density in the thin layer of air in contact with it, effectively improves the water vapor barrier performance of the photovoltaic device, and enhances the packaging effect and component stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic structural diagram of the perovskite photovoltaic device provided in Example 1 of the utility model.

[0040] Among them, 1-first substrate; 2-battery assembly; 3-packaging layer; 4-sealing layer; 5-water vapor removal layer; 6-second substrate; 7-junction box. DETAILED DESCRIPTION

[0041] It should be understood that, in the description of the present utility model, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0042] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0043] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0044] In a specific embodiment, the utility model provides a perovskite photovoltaic device, including a first substrate, a battery assembly, an encapsulation layer and a second substrate, wherein the battery assembly is located between the first substrate and the second substrate, and the encapsulation layer is located between the battery assembly and the first substrate and / or the second substrate; a sealing layer is arranged along the edge of the first substrate and the second substrate, the sealing layer is arranged between the first substrate and the second substrate, and a water vapor repelling layer is arranged around the outer periphery of the sealing layer, and the water vapor repelling layer includes a light-heat conversion layer. The sealing layer is arranged between the first substrate and the second substrate along the edge of the first substrate and the second substrate to confine the battery assembly and the encapsulation layer inside thereof, to prevent external water vapor from directly contacting the battery assembly, and the arranged water vapor repelling layer converts light energy into heat energy, and reduces the water vapor density in the thin layer of air in contact with it.

[0045] In some embodiments, the water vapor detachment layer also includes a plurality of photothermal particles dispersed inside the photothermal conversion layer. The total volume of the plurality of photothermal particles accounts for 40 to 70% of the volume of the photothermal conversion layer. The outer edge of the photothermal conversion layer is flush with the outer edge of the first substrate and / or the second substrate. The photothermal conversion layer described in the utility model is a transparent adhesive film, which can play a role in bonding and fixing the photothermal particles. Under light irradiation, the electronic or atomic vibrations of the photothermal particles are significantly enhanced and converted into thermal energy, so that the temperature of the water vapor detachment layer is increased, so as to heat and dry the thin layer of air in contact with the water vapor detachment layer at the periphery of the photovoltaic device, evaporate and drive away the water vapor, thereby reducing the water vapor density in the thin layer of air in contact with it, and reducing the water vapor intrusion into the interior through the side edges of the photovoltaic device.

[0046] Specifically, the water vapor detachment layer includes but is not limited to EVA, POE, PVB, acrylic resin, epoxy resin or organosilane commonly used by those skilled in the art. The photothermal particles can select Cu-CAT-1 metal organic framework materials, Zr-Fc metal organic framework materials, zirconium metallocene organic framework materials, or TPAD-CO and other materials well known to those skilled in the art. Compared with the adhesive film that does not contain photothermal particles, the photothermal particles of the utility model can be heated to above 60°C within 5 minutes under the irradiation of sunlight, and the warming effect is significantly improved, so that the temperature of the water vapor detachment layer under actual working conditions is 5 to 15°C higher than that of the non-water vapor detachment layer, effectively heating and drying the surroundings. Furthermore, the height of the water vapor detachment layer is 0.4 to 1 mm.

[0047] Depending on the material of the adhesive film, different preparation methods can be used to prepare the water vapor repellent layer. In order to help those skilled in the art better understand the overall technical solution and working process of the utility model, the utility model provides the following two preparation methods as examples: (1) Provide EVA, POE or PVB colloid, directly mix the photothermal particles into the colloid, stir evenly, and use the mixed material extrusion film forming method to obtain the water vapor repellent layer. (2) Provide acrylic resin, epoxy resin or organic silicone liquid, add the photothermal particles and perform ultrasonic dispersion treatment to make the photothermal particles evenly dispersed in the glue liquid, and then perform vacuum spray drying to obtain the water vapor repellent layer.

[0048] It should be noted that the present invention does not specifically limit the shape of the photothermal particles, which may be regular spherical, cylindrical or powdery, and those skilled in the art may adjust according to actual conditions.

[0049] In some embodiments, a conductive layer is further disposed on a surface of the first substrate close to the battery assembly. The utility model sputters a layer of transparent conductive oxide on the surface of the first substrate to form a conductive layer as the conductive layer of the battery assembly. The conductive oxide includes but is not limited to indium zinc oxide, indium tin oxide, indium hydroxide-doped indium, aluminum-doped zinc oxide, or zinc-doped tin oxide, etc., which are well known to those skilled in the art.

[0050] In some embodiments, the battery assembly includes a first transmission layer, a perovskite absorption layer, a second transmission layer and an internal electrode layer stacked in sequence from the first substrate to the second substrate. The first transmission layer is connected to the conductive layer on the surface of the first substrate, and the perovskite absorption layer, the second transmission layer and the internal electrode layer are sequentially deposited on the surface of the first transmission layer away from the conductive layer, and the internal electrode layer is connected to the encapsulation layer and is led out from the side by a wire. The first transmission layer and the second transmission layer are different from each other and can be an electron transmission layer or a hole transmission layer. That is, a conductive layer, an electron transmission layer, a perovskite absorption layer, a hole transmission layer, an internal electrode layer and an encapsulation layer are sequentially stacked between the first substrate and the second substrate, or a conductive layer, a hole transmission layer, a perovskite absorption layer, an electron transmission layer, an internal electrode layer and an encapsulation layer.

[0051] In some embodiments, the distance between the outer edge of the encapsulation layer and the outer edge of the first substrate or the second substrate is 10-15 mm. The distance between the outer edge of the sealing layer and the outer edge of the first substrate or the second substrate is 1-3 mm.

[0052] In some embodiments, the thickness of the sealing layer is greater than or equal to the thickness of the encapsulation layer. Specifically, the difference between the thickness of the sealing layer and the encapsulation layer is 0 to 0.1 mm. The thickness of the encapsulation layer is 0.5 to 1 mm.

[0053] In some embodiments, the encapsulation layer is an EVA adhesive layer, a PVB adhesive layer, a POE adhesive layer or a TPU adhesive layer, preferably a POE adhesive layer, and the water vapor permeability of the sealing layer is ≤ the water vapor permeability of the encapsulation layer. Specifically, the water vapor permeability of the POE adhesive layer is <2 g / m 2 ·day, packaging temperature <125℃, mild manufacturing conditions and low cost. The sealing layer is a butyl rubber layer with a water vapor transmission rate of <0.1g / m 2 ·day, effectively blocking the passage of water vapor, with low cost and good economy.

[0054] In the present invention, the length and width of the first substrate and the second substrate are greater than the length and width of the packaging layer. At the same time, the length and width of the packaging layer are not less than the length and width of the battery assembly, so that the packaging layer can completely cover the battery assembly.

[0055] In some embodiments, the first substrate is ultra-clear non-tempered glass, and the second substrate is tempered glass. Specifically, the thickness of the first substrate is 2.5-3.2 mm, and the thickness of the second substrate is 2-4 mm.

[0056] In some embodiments, the encapsulation layer includes a first encapsulation layer and a second encapsulation layer, the first encapsulation layer is located between the battery assembly and the first substrate, and the second encapsulation layer is located between the battery assembly and the second substrate, which can be applied to crystalline silicon and perovskite stacked cell photovoltaic devices to achieve double-sided encapsulation protection. A junction box is also provided on the side of the second substrate away from the first substrate for extracting the photoelectric energy of the photovoltaic device.

[0057] Example 1

[0058] This embodiment provides a perovskite photovoltaic device, such as Figure 1 As shown, it includes a first substrate 1, a battery assembly 2, an encapsulation layer 3 and a second substrate 6. The battery assembly 2 is located between the first substrate 1 and the second substrate 6, and the encapsulation layer 3 is located between the battery assembly 2 and the first substrate 1. A sealing layer 4 is arranged along the edge of the first substrate 1 and the second substrate 6, and the sealing layer 4 is placed between the first substrate 1 and the second substrate 6 to seal and connect the first substrate 2 and the second substrate 6. The first substrate 1, the encapsulation layer 3 and the sealing layer 4 form a receiving cavity, and the battery assembly 2 is located in the receiving cavity. A water vapor removal layer 5 is arranged around the outer periphery of the sealing layer 4, and its outer edge is flush with the outer edge of the first substrate 1. The first substrate 1 is ultra-white non-tempered glass with a thickness of 3mm, and the second substrate 6 is tempered glass with a thickness of 3.2mm. A junction box 7 is also arranged on the side of the second substrate 6 away from the first substrate 1, which is used to lead out the photoelectric energy of the photovoltaic device. The encapsulation layer 3 is a POE adhesive layer with a thickness of 1mm. The sealing layer 4 is a butyl adhesive layer with a thickness of 1mm. The water vapor repelling layer 5 is a light-heat conversion layer, and the light-heat conversion layer adopts an EVA adhesive layer. In this embodiment, a sealing layer and a water vapor repelling layer are added around the outer edge of the battery assembly to form a double-layer isolation barrier to prevent external water vapor from directly contacting the battery assembly.

[0059] Example 2

[0060] The present embodiment provides a perovskite photovoltaic device, comprising a first substrate 1, a battery assembly 2, an encapsulation layer 3 and a second substrate 6. The battery assembly 2 is located between the first substrate 1 and the second substrate 6, and the encapsulation layer is located between the battery assembly 2 and the first substrate 1. A sealing layer 4 is provided along the edge of the first substrate 1 and the second substrate 6, and the sealing layer is placed between the first substrate 1 and the second substrate 6 to seal and connect the first substrate 2 and the second substrate 6. A water vapor repelling layer 5 is provided around the outer periphery of the sealing layer 4, and the outer edge of the water vapor repelling layer 5 is flush with the outer edge of the first substrate 1. The first substrate 1, the encapsulation layer 3 and the sealing layer 4 form a receiving cavity, and the battery assembly 2 is located in the receiving cavity. The battery assembly 2 includes a plurality of sub-cells, and the sub-cells include a hole transport layer, a perovskite absorption layer, an electron transport layer and an internal electrode layer stacked in sequence from the first substrate 1 to the second substrate 6.

[0061] The first substrate 1 is TCO glass with a thickness of 3mm, and the second substrate 6 is tempered glass with a thickness of 3.5mm. A junction box 7 is also provided on the side of the second substrate 6 away from the first substrate 1, which is used to lead out the photoelectric energy of the photovoltaic device. The encapsulation layer 3 is a TPU adhesive layer with a thickness of 0.9mm. The sealing layer 4 is a butyl adhesive layer with a thickness of 1mm. The water vapor repellent layer 5 is a POE adhesive film, and a plurality of photothermal particles are dispersed inside the POE adhesive film. The photothermal particles are made of Cu-CAT-1 metal organic framework material, and their total volume accounts for 60% of the volume of the POE adhesive film. In this embodiment, a double-layer isolation barrier is formed on the peripheral edge of the battery assembly to prevent external water vapor from directly contacting the battery assembly. At the same time, by dispersing photothermal particles in the POE adhesive film, the thin layer of air in contact with the water vapor repellent layer on the periphery of the photovoltaic device is heated and dried under light irradiation, and the water vapor is evaporated and driven away, thereby reducing the water vapor density in the thin layer of air in contact with it, and reducing the water vapor from invading the inside through the side edge of the photovoltaic device.

[0062] Example 3

[0063] This embodiment provides a perovskite photovoltaic device, including a first substrate 1, a battery assembly 2, an encapsulation layer 3 and a second substrate 6. The battery assembly 2 is located between the first substrate 1 and the second substrate 6, and the encapsulation layer is located between the battery assembly 2 and the first substrate 1. A sealing layer 4 is arranged along the edge of the first substrate 1 and the second substrate 6, and the sealing layer is placed between the first substrate 1 and the second substrate 6 to seal and connect the first substrate 2 and the second substrate 6. A water vapor repelling layer 5 is arranged around the outer periphery of the sealing layer 4, and the outer edge of the water vapor repelling layer 5 is flush with the outer edge of the first substrate 1. The first substrate 1, the encapsulation layer 3 and the sealing layer 4 form a receiving cavity, and the battery assembly 2 is located in the receiving cavity. The first substrate 1 is TCO glass with a thickness of 2.5 mm, and the second substrate 6 is tempered glass with a thickness of 3 mm. A junction box 7 is also arranged on the side of the second substrate 6 away from the first substrate 1, which is used to lead out the photoelectric energy of the photovoltaic device. The battery assembly 2 includes a plurality of sub-cells, and the sub-cells are stacked in sequence from the first substrate 1 to the second substrate 6, including an electron transport layer, a perovskite absorption layer, a hole transport layer and an internal electrode layer. The water vapor expelling layer 5 includes an organic silane film, and a plurality of photothermal particles are dispersed inside the organic silane film. The photothermal particles are made of zirconium metallocene organic framework material, and their total volume accounts for 70% of the volume of the water vapor expelling layer 5. The outer edge of the water vapor expelling layer 5 is flush with the outer edge of the first substrate 1. The encapsulation layer 3 is a POE adhesive layer with a thickness of 0.8 mm. The sealing layer 4 is a butyl adhesive layer with a thickness of 0.8 mm. This embodiment forms a double-layer isolation barrier at the peripheral edge of the battery assembly to prevent external water vapor from directly contacting the battery assembly. At the same time, by dispersing photothermal particles in the POE adhesive film, the thin layer of air in contact with the water vapor expelling layer at the periphery of the photovoltaic device is heated and dried under light irradiation, and the water vapor is evaporated and driven away, thereby reducing the water vapor density in the thin layer of air in contact with it, and reducing the water vapor from invading the inside through the side edge of the photovoltaic device.

[0064] The applicant declares that the above is only a specific implementation method of the present utility model, but the protection scope of the present utility model is not limited thereto. The technicians in the relevant technical field should understand that any changes or substitutions that can be easily thought of by the technicians in the relevant technical field within the technical scope disclosed in the present utility model fall within the protection scope and disclosure scope of the present utility model.

Claims

1. A perovskite photovoltaic device, characterized in that: The perovskite photovoltaic device comprises a first substrate, a battery component, a packaging layer and a second substrate, wherein the battery component is located between the first substrate and the second substrate, and the packaging layer is located between the battery component and the first substrate or the second substrate; A sealing layer is arranged along the edges of the first substrate and the second substrate, the sealing layer is placed between the first substrate and the second substrate, a water vapor repelling layer is arranged around the outer periphery of the sealing layer, and the water vapor repelling layer includes a light-to-heat conversion layer.

2. The perovskite photovoltaic device according to claim 1, characterized in that: The water vapor expulsion layer further includes a plurality of photothermal particles dispersedly arranged inside the photothermal conversion layer; The total volume of the plurality of photothermal particles accounts for 40 to 70% of the volume of the photothermal conversion layer; The outer edge of the light-to-heat conversion layer is flush with the outer edge of the first substrate and / or the second substrate.

3. The perovskite photovoltaic device according to claim 1, characterized in that: The distance between the outer edge of the encapsulation layer and the outer edge of the first substrate or the second substrate is 10-15 mm.

4. The perovskite photovoltaic device according to claim 1, characterized in that: The battery assembly includes a plurality of electrically connected sub-batteries; The sub-cell includes a first transmission layer, a perovskite absorption layer, a second transmission layer and an internal electrode layer which are sequentially stacked from the first substrate to the second substrate.

5. The perovskite photovoltaic device according to claim 1, characterized in that: The distance between the outer edge of the sealing layer and the outer edge of the first substrate or the second substrate is 1 to 3 mm.

6. The perovskite photovoltaic device according to claim 1, characterized in that: The thickness of the sealing layer is greater than or equal to the thickness of the encapsulation layer.

7. The perovskite photovoltaic device according to claim 1, characterized in that: The encapsulation layer is an EVA adhesive layer, a PVB adhesive layer, a POE adhesive layer or a TPU adhesive layer; The sealing layer is one or more of a butyl rubber layer, a silicone rubber layer or an epoxy resin layer; The water vapor permeability of the sealing layer is less than or equal to the water vapor permeability of the encapsulation layer.

8. The perovskite photovoltaic device according to claim 1, characterized in that: The first substrate, the packaging layer and the sealing layer form a receiving cavity, and the battery assembly is located in the receiving cavity; A conductive layer is also provided on a surface of the first substrate or the second substrate on a side close to the battery assembly.

9. The perovskite photovoltaic device according to claim 1, characterized in that: The first substrate is ultra-clear non-tempered glass, and the second substrate is tempered glass; The thickness of the first substrate is 2.5 to 3.2 mm; The thickness of the second substrate is 2-4 mm.

10. The perovskite photovoltaic device according to claim 1, characterized in that: The encapsulation layer includes a first encapsulation layer and a second encapsulation layer, the first encapsulation layer is located between the battery assembly and the first substrate, the second encapsulation layer is located between the battery assembly and the second substrate, and a junction box is further provided on a side of the second substrate away from the first substrate.

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