Perovskite photovoltaic module

Abstract

The utility model provides a perovskite photovoltaic assembly. The perovskite photovoltaic assembly comprises front plate glass, a functional layer, a metal electrode, a packaging adhesive film, back plate glass, a first reflective film, a second reflective film and a waterproof layer, the front plate glass, the functional layer, the metal electrode, the packaging adhesive film, the second reflective film and the back plate glass are sequentially stacked; the first reflective film and the water blocking layer are stacked in a gap between the front plate glass and the back plate glass, the water blocking layer is connected with the back plate glass, and the first reflective film is connected with the front plate glass and is arranged in an area, not covered by the functional layer, of the back surface of the front plate glass; the functional layer is provided with an optical active area and a dead zone, and the position of the second reflective film corresponds to the position of the dead zone of the functional layer or the position of the functional layer; the first reflective film is provided with a first light conversion coating, and the second reflective film is provided with a second light conversion coating. According to the photovoltaic module, the utilization efficiency of sunlight in a non-optical active area in the perovskite photovoltaic module can be fully improved, the power of the module is improved, thermal damage is reduced, and the outdoor application requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of perovskite photovoltaic cell components, in particular to a perovskite photovoltaic component. Background Art

[0002] Currently, perovskite photovoltaic cells utilize a laser scribing process to separate and connect sub-cells in series. To improve moisture resistance, the cells are encapsulated using a laminator and hot pressing, mirroring the packaging method for crystalline silicon modules. This creates a significant gap between the active area of ​​the perovskite cell and the edge of the encapsulating glass. For example, in large, mass-produced formats (1.2m x 2.4m), a 2cm gap is reserved at the edge. This gap results in significant light loss (4-5%) around the perimeter. The laser-scribed area (dead zone) in perovskite photovoltaic cells also experiences optical loss (3-4%). ​​Existing technology can increase reflectivity and improve light utilization efficiency by applying a composite passivation layer to the metal back electrode surface. However, this process is challenging to implement, requiring multiple coating steps with precise matching, making it difficult and uneconomical.

[0003] Therefore, it is necessary to provide a perovskite photovoltaic module that improves light utilization efficiency. Utility Model Content

[0004] In order to solve the above problems, the purpose of the present invention is to provide a perovskite photovoltaic module, which can fully improve the utilization efficiency of sunlight in the non-optically active area of ​​the perovskite photovoltaic module, increase the module power, reduce thermal damage, and meet the needs of outdoor applications.

[0005] In order to achieve the above-mentioned objectives, the present invention provides a perovskite photovoltaic module, which includes a front glass, a functional layer, a metal electrode, an encapsulation film, a back glass, a first reflective film, a second reflective film and a water-blocking layer; the front glass, the functional layer, the metal electrode, the encapsulation film, the second reflective film and the back glass are stacked in sequence; the first reflective film and the water-blocking layer are stacked in the gap between the front glass and the back glass, the water-blocking layer is in contact with the back glass, and the first reflective film is in contact with the front glass and is provided in an area on the back of the front glass that is not covered by the functional layer; the functional layer has an optically active area and a dead area, and the position of the second reflective film corresponds to the position of the dead area of ​​the functional layer or corresponds to the position of the functional layer; the first reflective film is provided with a first light-converting coating, and the second reflective film is provided with a second light-converting coating.

[0006] According to a specific embodiment, the first reflective film includes a first base layer, a first microstructure layer, a first reflective layer, a first light-converting coating layer, and a first adhesive layer stacked in sequence; the first adhesive layer is in contact with the front glass.

[0007] According to a specific embodiment, the first microstructure layer includes a first base and several parallel arranged first microprismatic structures protruding from the surface of the first base; the distance between the vertices of adjacent first microprismatic structures is 20~70μm, and the protrusion height of the first microprismatic structure is 8~30μm; the thickness of the first base is 1~5μm.

[0008] According to a specific embodiment, the thickness of the first base layer is 20-100 μm; the thickness of the first light-reflecting layer is 30-100 nm; the thickness of the first light-converting coating layer is 1-10 μm; and the thickness of the first adhesive layer is 10-100 μm.

[0009] According to a specific embodiment, the second reflective film includes a second adhesive layer, a second base layer, a second microstructure layer, a second reflective layer, and a second light-converting coating layer stacked in sequence; the second adhesive layer is in contact with the back panel glass.

[0010] According to a specific embodiment, the second microstructure layer includes a second base and several parallel arranged second microprismatic structures protruding from the surface of the second base; the distance between the vertices of adjacent second microprismatic structures is 10~70μm, and the protrusion height of the second microprismatic structure is 8~30μm; the thickness of the second base is 1~5μm.

[0011] According to a specific embodiment, the thickness of the second base layer is 20-100 μm; the thickness of the second light-reflecting layer is 30-100 nm; the thickness of the second light-converting coating layer is 1-10 μm; and the thickness of the second adhesive layer is 10-100 μm.

[0012] According to a specific embodiment, when the position of the second reflective film corresponds to the dead zone position of the functional layer, the width of the second reflective film is 0.5-4 mm, and the length of the second reflective film matches the overall length of the dead zone of the functional layer; when the position of the second reflective film corresponds to the position of the functional layer, the length of the second reflective film matches the overall length of the functional layer, and the width of the second reflective film matches the overall width of the functional layer.

[0013] According to a specific embodiment, the functional layer includes an electron transport layer, a perovskite film layer, and a hole transport layer stacked in sequence; the thickness of the hole transport layer is 10~30nm; the thickness of the perovskite film layer is 400~800nm; the thickness of the electron transport layer is 10~30nm; the functional layer is scribed to form two or more sub-cells connected in series, and dead zones are formed between adjacent sub-cells.

[0014] According to a specific embodiment, the thickness of the front glass is 1.1-3.6 mm.

[0015] According to a specific embodiment, the thickness of the metal electrode is 30-200 nm.

[0016] According to a specific embodiment, the thickness of the packaging film is 300-800 μm.

[0017] According to a specific embodiment, the thickness of the water-blocking layer is 0.5-2 mm.

[0018] According to a specific implementation scheme, the thickness of the back panel glass is 1~3.5mm.

[0019] The beneficial effects of the utility model include:

[0020] The perovskite photovoltaic module provided by the utility model converts the light incident on the non-optically active area to convert ultraviolet light into visible light and converts near-infrared light into visible light. Then, through optical reflection (directional reflection), a reflective material such as a reflective film is attached to the non-optically active area of ​​the perovskite photovoltaic module (the non-optically active area around the functional layer and the dead zone area of ​​the functional layer), and the incident visible light irradiated to the area and the converted visible light are reflected to the optically active area of ​​the perovskite. This can improve the efficiency of the perovskite photovoltaic module in utilizing sunlight by 2-3%, and is more feasible, economical, and has more significant efficiency improvements. In addition, the perovskite photovoltaic module can reduce the damage of ultraviolet light to the perovskite material, as well as reduce the thermal effect caused by infrared light, reduce thermal damage, and meet the long-term application requirements of the module outdoors. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the perovskite photovoltaic module of the present invention.

[0022] Figure 2 This is a longitudinal cross-sectional view of the front glass, functional layer, and metal electrode of the present invention.

[0023] Figure 3 This is a schematic structural diagram of the first reflective film of the present invention.

[0024] Figure 4 This is a schematic structural diagram of the second reflective film of the present invention.

[0025] Figure 5 This is a transverse cross-sectional view of the perovskite photovoltaic module of the present invention along the functional layer.

[0026] Description of main figures:

[0027] Front glass 1, functional layer 2, metal electrode 3, encapsulation film 4, second reflective film 5, back glass 6, first reflective film 7, water-blocking layer 8; first base layer 71, first microstructure layer 72, first microprismatic structure 721, first base 722, first reflective layer 73, first light-converting coating 74, first adhesive layer 75; second adhesive layer 51, second base layer 52, second microstructure layer 53, second microprismatic structure 531, second base 532, second reflective layer 54, second light-converting coating 55; hole transport layer 21, perovskite film layer 22, electron transport layer 23; glass layer 11, conductive layer 12; optically active area A1, dead area A2, optically inactive area A3. DETAILED DESCRIPTION

[0028] In order to have a clearer understanding of the technical features, objectives and beneficial effects of the present invention, the technical solution of the present invention is now described in detail below, but it should not be understood as limiting the scope of implementation of the present invention.

[0029] In this utility model, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," etc. may explicitly or implicitly include one or more of such features. In the description of this utility model, "several" means two or more.

[0030] In the present invention, near infrared light is light with a wavelength of 780 to 2500 nm; ultraviolet light is light with a wavelength of 10 to 380 nm; and visible light is light with a wavelength of 380 to 780 nm.

[0031] The utility model provides a perovskite photovoltaic module. Figure 1 This is a schematic diagram of the structure of the perovskite photovoltaic module of the present invention. Figure 1 As shown, the perovskite photovoltaic module includes a front glass 1, a functional layer 2, a metal electrode 3, an encapsulating film 4, a back glass 6, a first reflective film 7, a second reflective film 5 and a water-blocking layer 8; the front glass 1, the functional layer 2, the metal electrode 3, the encapsulating film 4, the second reflective film 5 and the back glass 6 are stacked in sequence; the first reflective film 7 and the water-blocking layer 8 are stacked in the gap between the front glass 1 and the back glass 6, the water-blocking layer 8 is in contact with the back glass 6, the first reflective film 7 is in contact with the front glass 1 and is provided on the back of the front glass 1 in an area not covered by the functional layer 2; the functional layer 2 has an optically active area and a dead area, and the position of the second reflective film 5 corresponds to the position of the dead area of ​​the functional layer 2 or to the position of the functional layer 2; the first reflective film 7 is provided with a first light-converting coating 74, and the second reflective film 5 is provided with a second light-converting coating 55.

[0032] According to a specific embodiment, the first light-reflecting film 7 may be a light-reflecting film having a light-converting coating.

[0033] According to the specific implementation plan, Figure 3 This is a schematic structural diagram of the first reflective film of the present invention. Figure 3 As shown, the first reflective film 7 includes a first base layer 71 , a first microstructure layer 72 , a first reflective layer 73 , a first light-converting coating layer 74 , and a first adhesive layer 75 stacked in sequence; the first adhesive layer 75 is in contact with the front glass 1 .

[0034] According to a specific embodiment, the first microstructure layer 72 is disposed on the surface of the first base layer 71 .

[0035] According to a specific embodiment, the first microstructure layer 72 includes a first base 722 and a plurality of first microprism structures 721 protruding from a surface of the first base 722 and arranged in parallel.

[0036] According to a specific embodiment, the arrangement direction of the first micro-prismatic structures 721 is parallel to the length or width direction of the first base 722, and adjacent first micro-prismatic structures 721 are closely arranged (the bottom spacing is 0, and there may be gaps between vertices).

[0037] According to a specific embodiment, the distance between the vertices of adjacent first microprismatic structures 721 is 20-70 μm, for example, 20-60 μm, and the protrusion height of the first microprismatic structures 721 is 8-30 μm. In some specific embodiments, the protrusion heights of the first microprismatic structures 721 are substantially uniform along the extension direction of the first microprismatic structures 721.

[0038] According to a specific embodiment, the first microprismatic structure 721 is shaped like a triangular prism. The cross-section of the first microprismatic structure 721 along the thickness direction of the perovskite photovoltaic module is triangular, and the angle between the sides of the triangle and the first base 722 can be 0-90 degrees. Furthermore, the cross-section of the first microprismatic structure 721 can be an isosceles triangle.

[0039] According to a specific embodiment, the thickness of the first base 722 may be 1-5 μm, for example, 2 μm.

[0040] According to a specific embodiment, the first light reflecting layer 73 covers the surface of the first microstructure layer 72, and the shape of the first light reflecting layer 73 matches the surface shape of the first microstructure layer 72. More specifically, the shape of the first light reflecting layer 73 can be substantially the same as the surface shape of the first microstructure layer 72.

[0041] According to a specific embodiment, the first light-conversion coating 74 covers the surface of the first light-reflecting layer 73. The shape of the first light-conversion coating 74 matches the shape of the first light-reflecting layer 73. More specifically, the shape of the first light-conversion coating 74 can be substantially the same as the shape of the second light-reflecting layer 54. The first light-conversion coating 74 can convert ultraviolet light or near-infrared light into visible light, thereby reducing the surface temperature of the photovoltaic module and improving its resistance to ultraviolet aging.

[0042] According to a specific embodiment, the first adhesive layer 75 covers the surface of the first light-converting coating 74. The shape of the surface of the first adhesive layer 75 facing the first light-converting coating 74 matches the shape of the first light-converting coating 74; the surface of the first adhesive facing away from the first light-converting coating 74 is flat. More specifically, the shape of the surface of the first adhesive layer 75 facing the first light-converting coating 74 is substantially the same as the shape of the first light-converting coating 74.

[0043] According to a specific embodiment, the thickness of the first base layer 71 may be 20-100 μm, further 30-100 μm or 20-70 μm.

[0044] According to a specific embodiment, the thickness of the first light reflecting layer 73 may be 30-100 nm.

[0045] According to a specific embodiment, the thickness of the first light-reflecting coating 74 may be 1-10 μm.

[0046] According to a specific embodiment, the thickness of the first adhesive layer 75 may be 10-100 μm, or further 20-100 μm.

[0047] According to a specific embodiment, the transmittance of the first base layer 71 for light with a wavelength of 300-800 nm may be ≥85%.

[0048] According to a specific embodiment, the transmittance of the first light reflecting layer 73 for light with a wavelength of 300-800 nm may be ≤2%, and the reflectivity of the first light reflecting layer 73 for light with a wavelength of 300-800 nm may be ≥90%.

[0049] According to a specific embodiment, the transmittance of the first light-converting coating 74 for light with a wavelength of 300-800 nm may be ≥90%.

[0050] According to a specific embodiment, the transmittance of the first adhesive layer 75 for light with a wavelength of 300-800 nm may be ≥90%.

[0051] In the first reflective film 7 , the first base layer 71 may be a PET layer.

[0052] In the first reflective film 7 , the first microstructure layer 72 may be a UV curing glue layer.

[0053] In the first light reflecting film 7 , the first light reflecting layer 73 may be a metal layer, such as an aluminum-plated layer.

[0054] In the first reflective film 7, the first light-converting coating 74 may be made of a light-converting agent. The light-converting agent may be one or a combination of two or more selected from the group consisting of organic phosphors, rare earth complexes, and quantum dots. Specifically, the organic phosphor may be a triazine derivative, more specifically, 2-pentene-4,6-bis((1-phenyl)-1,3-butadienyl)-1,3,5-s-triazine. The rare earth complex may be one or a combination of two or more selected from the group consisting of europium ion-doped silicates and sodium yttrium fluoride (NaYF4). The quantum dots may be one or a combination of two or more selected from the group consisting of CdSe quantum dots and perovskite quantum dots. In some specific embodiments, the light-converting agent may be one or a combination of two or more selected from the group consisting of 2-pentene-4,6-bis((1-phenyl)-1,3-butadienyl)-1,3,5-s-triazine, europium ion-doped silicates, sodium yttrium fluoride, CdSe quantum dots, and perovskite quantum dots.

[0055] In the first reflective film 7 , the first adhesive layer 75 may be an EVA layer or a POE layer.

[0056] In the first reflective film 7, the first reflective layer 73 and the first light-converting coating 74 exhibit the following synergistic effect: the first light-converting coating 74 converts ultraviolet light or near-infrared light into visible light by converting light from the optically inactive region surrounding the functional layer 2. The first reflective layer 73 then reflects the visible light incident on the optically inactive region surrounding the functional layer 2 and the visible light converted by the first light-converting coating 74 back to the optically active region of the functional layer 2, thereby improving the utilization rate of sunlight by the perovskite photovoltaic module and reducing thermal damage to the perovskite photovoltaic module caused by infrared rays and module efficiency degradation caused by ultraviolet light.

[0057] According to a specific embodiment, the first reflective film 7 is disposed on the backside of the front glass 1 in an area not covered by the functional layer 2. Specifically, the first reflective film 7 surrounds the optically inactive area surrounding the functional layer 2. More specifically, the first reflective film 7 can be attached to the front glass 1 via a first adhesive layer 75. The lateral dimensions (length and width) of the first reflective film 7 match those of the optically inactive area surrounding the functional layer 2 of the front glass 1. Specifically, the first reflective film 7 covers the optically inactive area surrounding the functional layer 2 of the front glass 1 without obstructing the optically active area of ​​the functional layer 2.

[0058] According to a specific embodiment, the first reflective film 7 and the water-blocking layer 8 can fill the gap between the front glass 1 and the back glass 6. The combined thickness of the first reflective film 7 and the water-blocking layer 8 can match, or even be equal to, the combined thickness of the functional layer 2, the metal electrode 3, the encapsulating film 4, and the second reflective film 5. The thickness of the water-blocking layer 8 can be adjusted based on actual pressure requirements, and the thickness of the first reflective film 7 can be adjusted accordingly.

[0059] According to a specific embodiment, the second light-reflecting film 5 may be a light-reflecting film having a light-converting coating.

[0060] According to the specific implementation plan, Figure 4 This is a schematic diagram of the structure of the second reflective film in Example 1 of the utility model. Figure 4 As shown, the second reflective film 5 includes a second adhesive layer 51 , a second base layer 52 , a second microstructure layer 53 , a second reflective layer 54 , and a second light-converting coating layer 55 stacked in sequence; the second adhesive layer 51 is in contact with the back glass 6 .

[0061] According to a specific embodiment, the second adhesive layer 51 and the second microstructure layer 53 are respectively disposed on two opposite surfaces of the second base layer 52 .

[0062] According to a specific embodiment, the second microstructure layer 53 includes a second base 532 and a plurality of second microprism structures 531 protruding from a surface of the second base 532 and arranged in parallel.

[0063] According to a specific embodiment, the arrangement direction of the second micro-prismatic structures 531 is parallel to the length or width direction of the second base 532, and adjacent second micro-prismatic structures 531 are closely arranged (the bottom spacing is 0, and there may be gaps between vertices).

[0064] According to a specific embodiment, the distance between the vertices of adjacent second microprismatic structures 531 is 10~70μm, further 20~70μm or 20~60μm, and the protrusion height of the second microprismatic structure 531 is 8~30μm, further 8~20μm (i.e., the thickness of the second microprismatic structure 531 layer).

[0065] In some specific embodiments, along the extension direction of the second micro-prismatic structures 531 , the protrusion heights of the second micro-prismatic structures 531 are substantially the same.

[0066] According to a specific embodiment, the second microprismatic structure 531 is shaped like a triangular prism. The cross-section of the second microprismatic structure 531 along the thickness of the perovskite photovoltaic module is triangular, and the angle between the sides of the triangle and the second base 532 can be 0-90 degrees. Furthermore, the cross-section of the second microprismatic structure 531 can be an isosceles triangle.

[0067] According to a specific embodiment, the thickness of the second base 532 may be 1-5 μm, for example, 2 μm.

[0068] According to a specific embodiment, the second light reflecting layer 54 covers the surface of the second microstructure layer 53, and the shape of the second light reflecting layer 54 matches the surface shape of the second microstructure layer 53. More specifically, the shape of the second light reflecting layer 54 can be substantially the same as the surface shape of the second microstructure layer 53.

[0069] According to a specific embodiment, the second light-conversion coating 55 covers the surface of the second light-reflecting layer 54, and the shape of the second light-conversion coating 55 matches the shape of the second light-reflecting layer 54. More specifically, the shape of the second light-conversion coating 55 can be substantially the same as the shape of the second light-reflecting layer 54. The second light-conversion coating 55 can convert ultraviolet light or near-infrared light into visible light, thereby reducing the surface temperature of the photovoltaic module and improving its resistance to ultraviolet aging.

[0070] According to a specific embodiment, the thickness of the second adhesive layer 51 may be 10-100 μm.

[0071] According to a specific embodiment, the thickness of the second base layer 52 may be 20-100 μm, or further 20-70 μm.

[0072] According to a specific embodiment, the thickness of the second light reflecting layer 54 may be 30-100 nm.

[0073] According to a specific embodiment, the thickness of the second light-converting coating 55 may be 1-10 μm.

[0074] According to a specific embodiment, the transmittance of the second adhesive layer 51 for light with a wavelength of 300-800 nm may be ≥90%.

[0075] According to a specific embodiment, the transmittance of the second base layer 52 for light with a wavelength of 300-800 nm may be ≥90%, and the transmittance of the second light reflecting layer 54 for light with a wavelength of 300-800 nm may be ≤1%.

[0076] According to a specific embodiment, the reflectivity of the second light reflecting layer 54 for light with a wavelength of 300-800 nm is ≥90%.

[0077] According to a specific embodiment, the transmittance of the second light-converting coating 55 for light with a wavelength of 300-800 nm may be ≥90%.

[0078] In the second reflective film 5 , the second base layer 52 may be a PET layer.

[0079] In the second reflective film 5 , the second microstructure layer 53 may be a UV curing glue layer.

[0080] In the second light-reflecting film 5 , the second light-reflecting layer 54 may be a metal layer, such as an aluminum-plated layer.

[0081] In the second reflective film 5 , the second light-converting coating 55 may be made of a light-converting agent. Specifically, the light-converting agent may be one or a combination of two or more selected from the group consisting of organic phosphors, rare earth complexes, and quantum dots. The organic phosphor may be a triazine derivative, more specifically 2-pentene-4,6-bis((1-phenyl)-1,3-butadienyl)-1,3,5-s-triazine. The rare earth complex may be one or a combination of two or more selected from the group consisting of europium ion-doped silicates and sodium yttrium fluoride (NaYF4). The quantum dots may be one or a combination of two or more selected from the group consisting of CdSe quantum dots and perovskite quantum dots. In some specific embodiments, the light-converting agent may be one or a combination of two or more selected from the group consisting of 2-pentene-4,6-bis((1-phenyl)-1,3-butadienyl)-1,3,5-s-triazine, europium ion-doped silicates, sodium yttrium fluoride, CdSe quantum dots, and perovskite quantum dots.

[0082] In the second reflective film 5 , the second adhesive layer 51 may be an EVA layer or a POE layer.

[0083] In the second reflective film 5, the second reflective layer 54 and the second light-converting coating 55 exhibit the following synergistic effect: the second light-converting coating 55 converts ultraviolet light or near-infrared light into visible light by converting light incident on the dead zone of the functional layer 2. The second reflective layer 54 then reflects the visible light incident on the dead zone of the functional layer 2 and the visible light converted by the second light-converting coating 55 back to the optically active area of ​​the functional layer 2, thereby improving the utilization rate of sunlight by the perovskite photovoltaic module and reducing thermal damage to the perovskite photovoltaic module caused by ultraviolet or infrared rays.

[0084] According to a specific embodiment, when the position of the second reflective film 5 corresponds to the position of the dead zone of the functional layer 2 , the width of the second reflective film 5 may be 0.5-4 mm, for example, 0.5-1 mm.

[0085] According to a specific embodiment, when the position of the second light reflection film 5 corresponds to the position of the dead zone of the functional layer 2, the length of the second light reflection film 5 can match the length of the dead zone of the functional layer 2, more specifically, the length of the second light reflection film 5 can be substantially the same as the length of the dead zone of the functional layer 2.

[0086] According to a specific embodiment, when the position of the second light reflection film 5 corresponds to the position of the functional layer 2, the length of the second light reflection film 5 matches the overall length of the functional layer 2, more specifically, the length of the second light reflection film 5 is substantially the same as the overall length of the functional layer 2.

[0087] According to a specific embodiment, when the position of the second light reflection film 5 corresponds to the position of the functional layer 2, the width of the second light reflection film 5 matches the overall width of the functional layer 2, more specifically, the width of the second light reflection film 5 is substantially the same as the overall width of the functional layer 2.

[0088] According to a specific embodiment, the functional layer 2 comprises an electron transport layer 23, a perovskite film layer 22, and a hole transport layer 21 which are sequentially stacked; that is, the perovskite film layer 22 is located between the hole transport layer 21 and the electron transport layer 23.

[0089] According to a specific embodiment, the position of the second light reflection film 5 corresponds to the position of the dead zone of the functional layer 2 or the position of the perovskite film layer 22. In some specific embodiments, in the functional layer 2, the electron transport layer 23 can be in contact with the metal electrode 3, and correspondingly, the hole transport layer 21 can be in contact with the front plate glass 1; or, the hole transport layer 21 can be in contact with the metal electrode 3, and correspondingly, the electron transport layer 23 can be in contact with the front plate glass 1.

[0090] According to a specific embodiment, the hole transport layer 21 can be a NiO x layer.

[0091] According to a specific embodiment, the thickness of the hole transport layer 21 can be 10-30 nm.

[0092] According to a specific embodiment, the perovskite film layer 22 can be a FA x Cs 1-x PbI3film.

[0093] According to a specific embodiment, the thickness of the perovskite film layer 22 can be 400-800 nm.

[0094] According to a specific embodiment, the electron transport layer 23 can be a C 60 layer.

[0095] According to a specific embodiment, the thickness of the electron transport layer 23 may be 10-30 nm.

[0096] In the functional layer 2 described above, the functional layer 2 is scribed (e.g., laser-scribed) to form two or more sub-cells connected in series, with a dead zone formed between adjacent sub-cells. Specifically, the dead zone is the optically inactive region formed by the laser-scribed pattern in the functional layer 2. The functional layer 2 can be scribed using P1, P2, and P3 laser lines to achieve series and parallel connection of cells. The P1 and P3 laser lines are used to divide the functional layer 2 into several sub-cells, while the P2 laser line is used to connect two adjacent sub-cells in series. Figure 2 This is a longitudinal cross-sectional view of the front glass, functional layer, and metal electrode of the present invention. Figure 2 The dotted arrow in the figure represents the direction of current. Figure 2 As shown, the area from P1 laser marking to P3 laser marking is dead zone A2 (optically non-active), and the horizontal distance between the side of P1 laser marking away from P2 laser marking area and the side of P3 laser marking away from P2 laser marking area is the width of dead zone A2.

[0097] According to a specific embodiment, the position of the second light-reflecting film 5 corresponding to the dead zone of the functional layer 2 means that, in the thickness direction of the perovskite photovoltaic module, the projection of the second light-reflecting film 5 onto the functional layer 2 covers the position of the dead zone A2 of the functional layer 2. The position of the second light-reflecting film 5 corresponding to the position of the functional layer 2 means that, in the thickness direction of the perovskite photovoltaic module, the position of the second light-reflecting film 5 corresponds to the position of the functional layer 2.

[0098] Figure 5 This is a transverse cross-sectional view of the perovskite photovoltaic module of the present invention along the functional layer. Figure 5 As shown, the functional layer 2 has an optically active area A1 and a dead area A2; the optically inactive area A3 is located around the functional layer 2. According to a specific embodiment, when the second reflective sheeting 5 is positioned corresponding to the dead area A2 of the functional layer 2, the second reflective sheeting 5 can be a grid-type reflective sheeting. This grid-type reflective sheeting is divided into alternating hollow areas and solid areas. The solid areas have the aforementioned layered structure of a second adhesive layer 51, a second base layer 52, a second microstructured layer 53, a second reflective layer 54, and a second light-converting coating layer 55, stacked in this order. The hollow areas of the grid-type reflective sheeting correspond to the optically active area A1 of the functional layer 2, and the solid areas of the grid-type reflective sheeting correspond to the dead area A2 of the functional layer 2 (the projection of the solid areas of the grid-type reflective sheeting onto the functional layer 2 along the thickness direction falls within the dead area A2).

[0099] According to a specific embodiment, when the position of the second reflective film 5 corresponds to the position of the functional layer 2 (for example, corresponds to the position of the perovskite film layer 22 ), the second reflective film 5 may be a whole piece of reflective film.

[0100] According to a specific embodiment, the front glass 1 is FTO glass.

[0101] According to a specific embodiment, the thickness of the front glass 1 may be 1.1-3.6 mm.

[0102] According to a specific embodiment, the front glass 1 may include a stacked glass layer 11 and a conductive layer 12, and the functional layer 2 is in contact with the conductive layer 12 of the front glass 1. In some specific embodiments, the conductive layer 12 in the area on the back of the front glass 1 not covered by the functional layer 2 may be removed. In this case, the first reflective film 7 is in contact with the glass layer 11 of the front glass 1.

[0103] According to a specific embodiment, the metal electrode 3 is one of an Au electrode, an Ag electrode, a Cu electrode or an alloy electrode.

[0104] According to a specific embodiment, the thickness of the metal electrode 3 is 30-200 nm, and can further be 30-100 nm.

[0105] According to a specific embodiment, the packaging film 4 is an EVA layer or a POE layer.

[0106] According to a specific embodiment, the thickness of the packaging film 4 is 300-800 μm.

[0107] According to a specific implementation scheme, the thickness of the back glass 6 is 1-3.5 mm.

[0108] According to a specific embodiment, the back panel glass 6 may be patterned glass.

[0109] According to a specific embodiment, the water-blocking layer 8 may be a butyl rubber layer.

[0110] According to a specific embodiment, the thickness of the water-blocking layer 8 may be 0.5-2 mm.

[0111] Example 1

[0112] This embodiment provides a perovskite photovoltaic module, such as Figure 1As shown, the perovskite photovoltaic module includes a front glass 1, a functional layer 2, a metal electrode 3, an encapsulating film 4, a back glass 6, a first reflective film 7, a second reflective film 5, and a water-blocking layer 8. The front glass 1, the functional layer 2, the metal electrode 3, the encapsulating film 4, the second reflective film 5, and the back glass 6 are stacked in sequence. Along the thickness direction of the perovskite photovoltaic module, the edges of the front glass 1 and the back glass 6 are aligned, as are the edges of the functional layer 2, the metal electrode 3, the encapsulating film 4, and the second reflective film 5. Furthermore, the edges of the front glass 1 and the back glass 6 extend outward relative to the edge of the functional layer 2. Consequently, a gap exists between the front glass 1 and the back glass 6 along the thickness direction of the module.

[0113] The surface of the front glass 1 facing away from the functional layer 2 is the front surface, and the surface facing the functional layer 2 is the back surface. The back surface of the front glass 1 has an area covered by the functional layer 2 and an area not covered by the functional layer 2. The area of ​​the back surface of the front glass 1 not covered by the functional layer 2 is located around the functional layer 2 and is an optically inactive area.

[0114] The first reflective film 7 and the water-blocking layer 8 are stacked in the gap between the front glass 1 and the back glass 6 along the thickness direction of the assembly. The first reflective film 7 is closer to the front glass 1 than the water-blocking layer 8. The first reflective film 7 and the water-blocking layer 8 are arranged around the outside of the functional layer 2, the metal electrode 3, the encapsulating film 4 and the second reflective film 5. The first reflective film 7 is in contact with the front glass 1 and is specifically arranged on the back of the front glass 1 not covered by the functional layer 2 (i.e. Figure 5 The non-optically active area A3 around the functional layer 2 is shown. The water-blocking layer 8 is in contact with the back glass 6.

[0115] In some embodiments, as Figure 1 As shown, the first reflective film 7 is disposed around the outside of the functional layer 2 and the metal electrode 3. The water-blocking layer 8 is disposed around the outside of the encapsulating film 4 and the second reflective film 5 to provide water-blocking protection. Along the thickness of the assembly, the second reflective film 5 is positioned to correspond to the dead zone of the functional layer 2 or to the position of the functional layer 2.

[0116] The front glass 1 is specifically FTO glass, with a thickness of 1.1-3.6 mm.

[0117] FTO glass comprises a laminated glass layer 11 and a conductive layer 12. The conductive layer 12 faces the functional layer 2. The conductive layer 12 can be a TCO electrode layer or an FTO layer; in this embodiment, it is an FTO layer. The conductive layer 12 remains in the area of ​​the front glass 1 covered by the functional layer 2, meaning the functional layer 2 and the conductive layer 12 are in contact. The conductive layer 12 is removed from the surface of the front glass 1 not covered by the functional layer 2, leaving the first reflective film 7 in contact with the glass layer 11. The thickness of the conductive layer 12 is 300-800 nm.

[0118] The functional layer 2 includes a hole transport layer 21, a perovskite film layer 22, and an electron transport layer 23 stacked in sequence. In this embodiment, the hole transport layer 21 can be in contact with the front glass 1, and the electron transport layer 23 can be in contact with the metal electrode 3 (e.g., Figure 1 As shown); in some other specific embodiments, the electron transport layer 23 may be in contact with the front glass 1, and the hole transport layer 21 may be in contact with the metal electrode 3 (not shown).

[0119] The hole transport layer 21 is NiO x layer, with a thickness of 10~30nm; the perovskite film layer 22 is FA x Cs 1-x PbI3 film, thickness is 400~800nm; electron transport layer 23 is C 60 layer with a thickness of 10~30nm.

[0120] The functional layer 2 is divided into several (i.e. more than two) sub-cells by laser scribing P1, P2, and P3, with adjacent sub-cells connected in series and forming dead zones. Figure 2 As shown, the P1 laser-marked area penetrates the conductive layer 12 of the front glass 1, the P2 laser-marked area penetrates the functional layer 2, and the P3 laser-marked area penetrates the metal electrode 3 and the functional layer 2. The P1 laser-marked area, the P2 laser-marked area, and the P3 laser-marked area are arranged in order in the horizontal direction. The P1 laser-marked area to the P3 laser-marked area are non-optically active areas, that is, dead areas A2; the remaining area of ​​the functional layer (unmarked area) is the optically active area A1. Figure 2 As shown, the width of the dead zone A2 is the distance between the side of the P1 laser-scribe region facing away from the P2 laser-scribe region and the side of the P3 laser-scribe region facing away from the P2 laser-scribe region. Figure 2 The area of ​​the dead zone A2 of the middle functional layer 2 accounts for 3%-6% of the total area of ​​the functional layer 2.

[0121] The metal electrode 3 is an Ag electrode with a thickness of 30-100 nm.

[0122] The encapsulation film 4 is a POE layer with a thickness of 300-800 μm. The encapsulation film 4 can be formed by laying a film on the surface of the metal electrode 3.

[0123] The first reflective film 7 is a reflective film with a light-converting coating, such as Figure 3 As shown, the first reflective film 7 includes a first base layer 71, a first microstructure layer 72, a first reflective layer 73, a first light-converting coating layer 74, and a first adhesive layer 75, which are stacked in sequence. The first adhesive layer 75 is in contact with the front glass 1.

[0124] The first base layer 71 is a PET layer, and the thickness of the first base layer 71 is 30-100 μm. The transmittance of the first base layer 71 for light with a wavelength of 300-800 nm can be ≥90%.

[0125] The first microstructure layer 72 is composed of a first base 722 and a plurality of parallel-arranged first microprism structures 721 protruding from the surface of the first base 722. The thickness of the first base 722 is 1-5 μm.

[0126] The arrangement direction of the first micro-prism structures 721 is parallel to the length or width direction of the first base 722 and perpendicular to the thickness direction of the first base 722 .

[0127] The adjacent first micro-prism structures 721 are closely arranged. The distance between the vertices of the adjacent first micro-prism structures 721 is 30-70 μm, and the protrusion height of the first micro-prism structure 721 is 8-30 μm. Figure 3 It can be seen that along the extension direction of the first micro-prism structures 721 , the protrusion heights of the first micro-prism structures 721 are substantially the same.

[0128] The first micro-prismatic structure 721 is in the shape of a triangular prism. Along the thickness direction of the assembly, the cross-section of the first micro-prismatic structure 721 is a triangle. The angle between the sides of the triangle and the first base 722 can be 0-90 degrees. In this embodiment, the cross-section of the first micro-prismatic structure 721 can be an isosceles triangle.

[0129] The material of the first microstructure layer 72 is UV curing glue. That is, the material of the first microprism structure 721 and the first base 722 are both UV curing glue.

[0130] The first light-reflecting layer 73 covers the surface of the first microstructure layer 72. The shape of the first light-reflecting layer 73 matches the surface shape of the first microstructure layer 72 (the surface shape of the first microprismatic structures 721). The first light-reflecting layer 73 is an aluminum-plated layer. The thickness of the first light-reflecting layer 73 is 30-100 nm. The transmittance of the first light-reflecting layer 73 for light with a wavelength of 300-800 nm can be ≤1%, and the reflectivity of the first light-reflecting layer 73 for light with a wavelength of 300-800 nm can be ≥90%.

[0131] The first light-converting coating 74 covers the surface of the first light-reflecting layer 73. The shape of the first light-converting coating 74 matches the shape of the first light-reflecting layer 73. The thickness of the first light-converting coating 74 is 1-10 μm. The transmittance of the first light-converting coating 74 for light with a wavelength of 300-800 nm can be ≥90%.

[0132] The first light-converting coating 74 is made of a light-converting agent. Specifically, the first light-converting coating 74 includes one or a combination of two or more of an organic phosphor layer (such as a triazine derivative layer, more specifically a 2-pentene-4,6-bis((1-phenyl)-1,3-butadienyl)-1,3,5-s-triazine layer), a rare earth complex layer (such as a europium ion-doped silicate layer and / or a sodium yttrium fluoride layer (NaYF4 layer)), or a quantum dot layer (such as a CdSe quantum dot layer and / or a perovskite quantum dot layer). Furthermore, the first light-converting coating 74 can be one or a combination of two or more of a 2-pentene-4,6-bis((1-phenyl)-1,3-butadienyl)-1,3,5-s-triazine layer, a europium ion-doped silicate layer, a sodium yttrium fluoride layer, a CdSe quantum dot layer, or a perovskite quantum dot layer.

[0133] The first adhesive layer 75 covers the surface of the first light-converting coating 74. The surface of the first adhesive layer 75 facing the first light-converting coating 74 matches the shape of the first light-converting coating 74; the surface of the first adhesive layer facing away from the first light-converting coating 74 is flat. The transmittance of the first adhesive layer 75 for light with a wavelength of 300-800 nm can be ≥90%. The first adhesive layer 75 is an EVA layer or a POE layer, and has a thickness of 10-100 μm.

[0134] The first reflective film 7 is disposed around the optically inactive area around the functional layer 2. The first adhesive layer 75 in the first reflective film 7 is in contact with the front glass 1. The size of the first reflective film 7 matches the size of the optically inactive area around the functional layer 2.

[0135] The second reflective film 5 is a reflective film with a light-converting coating. Figure 4 As shown, the second reflective film 5 includes a second adhesive layer 51, a second base layer 52, a second microstructure layer 53, a second reflective layer 54, and a second light-converting coating layer 55 stacked in sequence. The second adhesive layer 51 is in contact with the back glass 6.

[0136] The second adhesive layer 51 and the second microstructure layer 53 are respectively located on two opposite surfaces of the second base layer 52 .

[0137] The second adhesive layer 51 is an EVA layer or a POE layer, and has a thickness of 10-100 μm. The transmittance of the second adhesive layer 51 for light with a wavelength of 300-800 nm can be ≥90%.

[0138] The second base layer 52 is a PET layer, and the thickness of the second base layer 52 is 20-100 μm. The transmittance of the second base layer 52 for light with a wavelength of 300-800 nm can be ≥90%.

[0139] The second microstructure layer 53 is composed of a second base 532 and a plurality of second microprism structures 531 arranged in parallel and protruding from the surface of the second base 532. The thickness of the second base 532 is 1-5 μm.

[0140] The arrangement direction of the second micro-prism structures 531 is parallel to the length or width direction of the second base 532 and perpendicular to the thickness direction of the second base 532 .

[0141] The adjacent second micro-prism structures 531 are closely arranged. The distance between the vertices of the adjacent second micro-prism structures 531 is 10-60 μm, and the protrusion height of the second micro-prism structure 531 is 8-30 μm. Figure 4 It can be seen that along the extension direction of the second micro-prism structures 531 , the protrusion heights of the second micro-prism structures 531 are substantially the same.

[0142] The second micro-prismatic structure 531 is in the shape of a triangular prism. Along the thickness of the assembly, the cross-section of the second micro-prismatic structure 531 is triangular. The angle between the sides of the triangle and the second base 532 can be between 0° and 90°. In this embodiment, the cross-section of the second micro-prismatic structure 531 can be an isosceles triangle.

[0143] The second microstructure layer 53 is made of UV curing glue. That is, the second microprism structure 531 and the second base 532 are both made of UV curing glue.

[0144] The second light-reflecting layer 54 covers the surface of the second microstructure layer 53. The shape of the second light-reflecting layer 54 matches the surface shape of the second microstructure layer 53 (the surface shape of the second microprismatic structure 531). The second light-reflecting layer 54 is an aluminum-plated layer. The thickness of the second light-reflecting layer 54 is 30-100 nm. The transmittance of the second light-reflecting layer 54 for light with a wavelength of 300-800 nm can be ≤1%, and the reflectivity of the second light-reflecting layer 54 for light with a wavelength of 300-800 nm can be ≥90%.

[0145] The second light-converting coating 55 covers the surface of the second light-reflecting layer 54. The shape of the second light-converting coating 55 matches the shape of the second light-reflecting layer 54. The thickness of the second light-converting coating 55 is 1-10 μm. The transmittance of the second light-converting coating 55 for light with a wavelength of 300-800 nm can be ≥90%.

[0146] The second light-conversion coating 55 is made of a light-conversion agent. Specifically, the second light-conversion coating 55 includes one or a combination of two or more of an organic phosphor layer (such as a triazine derivative layer, more specifically a 2-pentene-4,6-bis((1-phenyl)-1,3-butadienyl)-1,3,5-s-triazine layer), a rare earth complex layer (such as a europium ion-doped silicate layer and / or a sodium yttrium fluoride layer (NaYF4 layer)), a quantum dot layer (such as a CdSe quantum dot layer and / or a perovskite quantum dot layer), and the like. Furthermore, the second light-conversion coating 55 can be one or a combination of two or more of a 2-pentene-4,6-bis((1-phenyl)-1,3-butadienyl)-1,3,5-s-triazine layer, a europium ion-doped silicate layer, a CdSe quantum dot layer, or a perovskite quantum dot layer.

[0147] The second reflective film 5 is sandwiched between the encapsulation film 4 and the back glass 6. Specifically, the second adhesive layer 51 of the second reflective film 5 is in contact with the back glass 6. In the thickness direction of the perovskite photovoltaic module, the position of the second reflective film 5 corresponds to the dead zone of the functional layer 2 or the position of the perovskite film layer 22 of the functional layer 2.

[0148] When the position of the second reflective film 5 corresponds to the position of the dead zone of the functional layer 2, the width of the second reflective film 5 is 0.5-4 mm, and the length of the second reflective film 5 can match the length of the dead zone of the functional layer 2. More specifically, the length of the second reflective film 5 can be substantially the same as the length of the dead zone of the functional layer 2. Alternatively, when the position of the second reflective film 5 corresponds to the position of the functional layer 2, the length of the second reflective film 5 matches the overall length of the functional layer 2 (the overall length of the perovskite film layer 22), and the width of the second reflective film 5 matches the overall width of the functional layer 2 (the overall width of the perovskite film layer 22). More specifically, the length of the second reflective film 5 is substantially the same as the overall length of the functional layer 2 (the overall length of the perovskite film layer 22), and the width of the second reflective film 5 is substantially the same as the overall width of the functional layer 2 (the overall width of the perovskite film layer 22).

[0149] from Figure 5 It can be seen that the functional layer 2 has an optically active area A1 (also serving as a perovskite cell area) and a dead area A2 of the functional layer, and the optically inactive area A3 is located around the functional layer 2. Figure 5As shown, when the position of the second reflective sheeting 5 corresponds to the dead zone A2 of the functional layer 2, the second reflective sheeting 5 can be a grid-type reflective sheeting. Specifically, the second reflective sheeting 5 is divided into alternating hollow regions and solid regions. The solid regions comprise the aforementioned layered structure of a second adhesive layer 51, a second base layer 52, a second microstructure layer 53, a second reflective layer 54, and a second light-converting coating layer 55, stacked in sequence. The position of the solid regions corresponds to the dead zone A2 in the functional layer 2, and the shape of the solid regions matches that of the functional layer 2. The position of the hollow regions corresponds to the position of the optically active region A1 in the functional layer 2, and the shape of the hollow regions matches that of the optically active region A1 in the functional layer 2.

[0150] When the area of ​​the second light reflecting film 5 corresponds to the position of the functional layer 2 , the second light reflecting film 5 may be a whole piece of light reflecting film, that is, the second light reflecting film 5 is entirely a solid area.

[0151] The thickness of the back glass 6 is 1-3.5 mm. The back glass 6 can be patterned glass.

[0152] The water-blocking layer 8 is a butyl rubber layer with a thickness of 0.5 to 2 mm.

[0153] Perovskite photovoltaic modules can be packaged by arranging the above structures in position and then hot pressing them using a laminator.

[0154] Test Case

[0155] In the following tests, the perovskite photovoltaic module (test sample) comprising the first reflective film and the second reflective film is the perovskite photovoltaic module of Example 1, and its structure is as follows: Figure 1 The specific structure of each layer is as follows:

[0156] The front glass 1 is FTO glass, with a thickness of 3.0 mm, of which the FTO layer (conductive layer 12) is 600 nm thick. The metal electrode 3 is an Ag electrode, with a thickness of 100 nm. The encapsulating film 4 is a POE layer, with a thickness of 0.5 mm. The back glass 6 is embossed glass, with a thickness of 3.0 mm. The water-blocking layer 8 is a butyl adhesive layer, with a thickness of 1 mm.

[0157] In the functional layer 2, the hole transport layer 21 is NiO x layer, thickness 25nm; perovskite film layer 22 is FA x Cs 1-x PbI3 film, thickness 590nm; electron transport layer 23 is C 60 layer with a thickness of 20 nm.

[0158] In the first reflective film 7, the first base layer 71 is a PET layer with a thickness of 38 μm; the first reflective layer 73 is an aluminum-plated layer with a thickness of 80 nm; and the first light-reflecting coating layer 74 is 5 μm thick. The first adhesive layer 75 is an EVA layer with a thickness of 60 μm. The first microstructure layer 72 is made of UV-curable adhesive. The distance between the vertices of adjacent first microprismatic structures 721 is 50 μm, and the height of the protrusions of the first microprismatic structures 721 is 18 μm. The cross-section of the first microprismatic structures 721 is triangular, and the angle between the sides of the triangle and the first base 722 is 25°-35° (selectable from 0 to 90°). The thickness of the first base 722 is 2 μm.

[0159] In the second reflective film 5, the second adhesive layer 51 is an EVA layer with a thickness of 60 μm, the second base layer 52 is a PET layer with a thickness of 38 μm, the second reflective layer 54 is an aluminum-plated layer with a thickness of 80 nm, and the second light-converting coating layer 55 has a thickness of 5 μm.

[0160] The second microstructure layer 53 is made of UV-curable glue. The distance between the vertices of adjacent second microprism structures 531 is 50 μm, and the protrusion height of each second microprism structure 531 is 18 μm. The cross-section of the second microprism structure 531 is triangular, and the angle between the sides of the triangle and the second base 532 is -25°-35° (selectable from 0 to 90°). The thickness of the second base 532 is 2 μm.

[0161] The power of the perovskite photovoltaic module (0.6m×1.2m) used as the test sample was tested using a solar simulator. The test method was to connect the probe of the solar simulator to the positive and negative electrodes of the perovskite photovoltaic module to ensure a good connection. 2 The irradiation light source illuminates the photovoltaic module, and the IV curve of the module under light is detected to obtain the module power.

[0162] Comparative Sample 1 is an assembly without the first and second reflective films. Its other structural features are the same as those of the aforementioned test sample. The power of Comparative Sample 1 is 135W, while the power of the assembly of the embodiment used as the test sample is 139W, an increase of 2.8%.

[0163] The perovskite photovoltaic modules used as test samples were tested for their resistance to infrared heat damage using infrared temperature measurement equipment. In the perovskite photovoltaic modules of the above-mentioned embodiment used in the test, the first and second reflective coatings of the first and second reflective films were both made of sodium yttrium fluoride (NaYF4), which converts near-infrared light into visible light. Comparative Sample 2 did not include a reflective coating on the first and second reflective films, but otherwise had the same structural features as the test sample. The surface temperature of the module used as the test sample embodiment was 53°C in an ambient temperature of 25°C, which was 1-2°C lower than the reflective film module of Comparative Sample 2, which did not have a reflective coating.

[0164] The UV aging resistance of the perovskite photovoltaic modules used as test samples was tested using a UV aging test chamber. The perovskite photovoltaic modules used in the above-described embodiment had both the first and second light-reflecting coatings of the first and second reflective films made of a triazine derivative, 2-pentene-4,6-bis((1-phenyl)-1,3-butadienyl)-1,3,5-s-triazine, which converts ultraviolet light into visible light. After aging with 120 kWh of UV light, the module's efficiency attenuation was less than 3%. Under the same test conditions, the module in Test Sample 2, which did not have a light-reflecting coating, exhibited a 5% attenuation.

[0165] The above results show that compared with existing perovskite photovoltaic modules, the perovskite photovoltaic modules provided by the present invention have higher efficiency in utilizing sunlight, the power of the modules can be increased by 2%-3%, the ability to resist thermal damage from near-infrared light and ultraviolet light is stronger, and the anti-aging ability is stronger, which meets the needs of long-term outdoor application of the modules.

Claims

1. A perovskite photovoltaic module, characterized in that: The perovskite photovoltaic module comprises a front plate glass (1), a functional layer (2), a metal electrode (3), an encapsulation film (4), a back plate glass (6), a first reflective film (7), a second reflective film (5) and a water-blocking layer (8); The front glass (1), the functional layer (2), the metal electrode (3), the encapsulating film (4), the second reflective film (5), and the back glass (6) are stacked in sequence; the first reflective film (7) and the water-blocking layer (8) are stacked in the gap between the front glass (1) and the back glass (6); the water-blocking layer (8) is in contact with the back glass (6); the first reflective film (7) is in contact with the front glass (1) and is arranged in an area on the back of the front glass (1) that is not covered by the functional layer (2); The functional layer (2) has an optically active area and a dead area, and the position of the second light-reflecting film (5) corresponds to the position of the dead area of ​​the functional layer (2) or corresponds to the position of the functional layer (2); The first light-reflecting film (7) is provided with a first light-reflecting coating (74), and the second light-reflecting film (5) is provided with a second light-reflecting coating (55).

2. The perovskite photovoltaic module according to claim 1, characterized in that The first reflective film (7) comprises a first base layer (71), a first microstructure layer (72), a first reflective layer (73), a first light-converting coating layer (74), and a first adhesive layer (75) stacked in sequence; the first adhesive layer (75) is in contact with the front plate glass (1).

3. The perovskite photovoltaic module according to claim 2, characterized in that: The first microstructure layer (72) comprises a first base (722) and a plurality of first microprism structures (721) arranged in parallel and protruding from the surface of the first base (722); The distance between the vertices of adjacent first micro-prism structures (721) is 20-70 μm, and the protrusion height of the first micro-prism structure (721) is 8-30 μm; The thickness of the first base (722) is 1-5 μm.

4. The perovskite photovoltaic module according to claim 2, characterized in that: The thickness of the first base layer (71) is 20-100 μm; The thickness of the first light reflecting layer (73) is 30-100 nm; The thickness of the first light-converting coating (74) is 1-10 μm; The thickness of the first adhesive layer (75) is 10-100 μm.

5. The perovskite photovoltaic module according to claim 1, characterized in that: The second reflective film (5) comprises a second adhesive layer (51), a second base layer (52), a second microstructure layer (53), a second reflective layer (54), and a second light-converting coating layer (55) stacked in sequence; the second adhesive layer (51) is in contact with the back panel glass (6).

6. The perovskite photovoltaic module according to claim 5, characterized in that: The second microstructure layer (53) comprises a second base (532) and a plurality of second microprism structures (531) arranged in parallel and protruding from the surface of the second base (532); The distance between the vertices of adjacent second micro-prism structures (531) is 10-70 μm, and the protrusion height of the second micro-prism structure (531) is 8-30 μm; The thickness of the second base (532) is 1-5 μm.

7. The perovskite photovoltaic module according to claim 5, characterized in that: The thickness of the second base layer (52) is 20-100 μm; The thickness of the second light reflecting layer (54) is 30-100 nm; The thickness of the second light-converting coating (55) is 1-10 μm; The thickness of the second adhesive layer (51) is 10-100 μm.

8. The perovskite photovoltaic module according to claim 1, characterized in that: When the position of the second reflective film (5) corresponds to the dead zone position of the functional layer (2), the width of the second reflective film (5) is 0.5-4 mm, and the length of the second reflective film (5) matches the overall length of the dead zone of the functional layer (2); When the position of the second reflective film (5) corresponds to the position of the functional layer (2), the length of the second reflective film (5) matches the overall length of the functional layer (2), and the width of the second reflective film (5) matches the overall width of the functional layer (2).

9. The perovskite photovoltaic module according to claim 1, characterized in that: The functional layer (2) includes an electron transport layer (23), a perovskite film layer (22), and a hole transport layer (21) stacked in sequence; The thickness of the hole transport layer (21) is 10-30 nm; the thickness of the perovskite film layer (22) is 400-800 nm; the thickness of the electron transport layer (23) is 10-30 nm; The functional layer (2) is scribed to form two or more sub-cells connected in series, with dead zones formed between adjacent sub-cells.

10. The perovskite photovoltaic module according to claim 1, characterized in that: The thickness of the front glass (1) is 1.1-3.6 mm; And / or, the thickness of the metal electrode (3) is 30-200 nm; And / or, the thickness of the packaging film (4) is 300-800 μm; and / or, the thickness of the water-blocking layer (8) is 0.5-2 mm; And / or, the thickness of the back panel glass (6) is 1-3.5 mm.

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