Laminated solar cell module and photovoltaic system

Abstract

The utility model is suitable for the technical field of solar cells, and provides a laminated solar cell module and a photovoltaic system. The first packaging layer is arranged on the back plate; the perovskite crystalline silicon laminated cell is arranged on the first packaging layer; the antireflection packaging layer is arranged on the perovskite crystalline silicon laminated cell and comprises an antireflection region with an antireflection structure and a non-reflection region arranged on the periphery of the antireflection region; the second packaging layer is arranged on the non-reflection area, and the second packaging layer is arranged in a hollowed-out mode corresponding to the anti-reflection area; and the cover plate is arranged on the second packaging layer, and the cover plate and the anti-reflection region are spaced. According to the laminated solar cell module, the antireflection packaging layer is used for packaging, an antireflection film does not need to be prepared when the perovskite crystalline silicon laminated cell is prepared, the processing technology of the perovskite crystalline silicon laminated cell is simplified, the cover plate and the antireflection packaging layer are separated through the second packaging layer, and the good antireflection effect of the antireflection packaging layer is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cells, in particular to a laminated solar cell assembly and a photovoltaic system. Background Art

[0002] Since perovskite solar cells have high photoelectric conversion efficiency and low manufacturing cost, crystalline silicon cells and perovskite cells are made into stacked solar cells to maximize the absorption spectrum and improve cell efficiency. Therefore, the application prospects of perovskite solar cells and crystalline silicon solar cells stacked together are very broad.

[0003] In the prior art, since the transparent conductive film / air interface on the front surface of the perovskite top cell of the perovskite crystalline silicon tandem cell has severe reflection of light, it will reduce the short-circuit current of the tandem cell. Therefore, in order to reduce the reflection on the front surface of the tandem cell, it is necessary to evaporate a layer of anti-reflection film on the upper surface of the perovskite top cell when preparing the perovskite top cell, which makes the cell processing technology complicated. After the perovskite crystalline silicon tandem cell is packaged into a component, the anti-reflection film is in direct contact with the cover plate, which easily causes the anti-reflection structure of the anti-reflection film to be damaged, thereby affecting the anti-reflection effect of the anti-reflection film. Utility Model Content

[0004] The utility model provides a laminated solar cell assembly, aiming to solve the problems of the laminated solar cell assembly in the prior art that an anti-reflection film needs to be prepared on the laminated cell, the cell processing technology is complicated, and the anti-reflection structure of the anti-reflection film is easily damaged during cell packaging, thus affecting the anti-reflection effect.

[0005] The utility model is implemented by providing a laminated solar cell assembly, comprising:

[0006] Back panel;

[0007] a first packaging layer disposed on the backplane;

[0008] A perovskite crystalline silicon stacked cell disposed on the first packaging layer;

[0009] An anti-reflection packaging layer is provided on the perovskite crystalline silicon stacked cell, wherein the anti-reflection packaging layer includes an anti-reflection area provided with an anti-reflection structure, and a non-reflection area provided on the periphery of the anti-reflection area;

[0010] A second packaging layer is disposed on the non-reflective region, wherein the second packaging layer is hollowed out corresponding to the anti-reflective region; and

[0011] A cover plate is disposed on the second packaging layer, wherein the cover plate is spaced apart from the anti-reflection region.

[0012] Preferably, the anti-reflection structure is one or a combination of a pyramid-shaped texture, a sawtooth-shaped texture or a hemispherical texture.

[0013] Preferably, the anti-reflection packaging layer is made of EVA material or POE material.

[0014] Preferably, it also includes:

[0015] The edge sealing layer is arranged around the outer side surfaces of the first packaging layer, the perovskite crystalline silicon stacked cell, the anti-reflection packaging layer and the second packaging layer, and the edge sealing layer is bonded to the back plate and the cover plate.

[0016] Preferably, the edge sealing layer is one or a combination of PIB or butyl rubber.

[0017] Preferably, the back plate and the cover plate are made of one or a combination of glass, PC, PVF, and ETFE.

[0018] Preferably, the first encapsulation layer and the second encapsulation layer are made of EVA material or POE material.

[0019] Preferably, the perovskite crystalline silicon stacked cell includes a crystalline silicon bottom cell, a conductive bonding layer arranged on the crystalline silicon bottom cell, and a perovskite top cell arranged on the conductive bonding layer, and the anti-reflective packaging layer is arranged on the top of the perovskite top cell.

[0020] Preferably, the perovskite top cell includes a hole transport layer, a perovskite layer, an electron transport layer, a transparent conductive layer, and a top electrode arranged in sequence from bottom to top, and the anti-reflection packaging layer is stacked on the top electrode.

[0021] The utility model also provides a photovoltaic system, comprising the laminated solar cell assembly.

[0022] The utility model provides a laminated solar cell assembly that provides an anti-reflection packaging layer. When preparing a perovskite crystalline silicon laminated cell, there is no need to prepare an anti-reflection film. Only the anti-reflection packaging layer needs to be used for packaging the perovskite crystalline silicon laminated cell, thereby reducing the light reflection of the perovskite crystalline silicon laminated cell. The processing technology of the perovskite crystalline silicon laminated cell is simplified, and the processing difficulty and cost are reduced. Moreover, a second packaging layer is provided between the cover plate and the anti-reflection packaging layer, and the position of the second packaging layer corresponding to the anti-reflection area is hollowed out so that the area of ​​the second packaging layer corresponding to the anti-reflection area can transmit light. At the same time, the second packaging layer separates the cover plate from the anti-reflection packaging layer, thereby avoiding direct contact between the cover plate and the anti-reflection packaging layer to damage the anti-reflection structure on the anti-reflection packaging layer, thereby ensuring a good anti-reflection effect of the anti-reflection packaging layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a laminated solar cell assembly provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] A stacked solar cell assembly provided by an embodiment of the utility model is provided with an anti-reflection packaging layer. When the perovskite crystalline silicon stacked cell is packaged, the anti-reflection packaging layer is used to reduce the light reflection of the perovskite crystalline silicon stacked cell. There is no need to prepare an anti-reflection film when preparing the perovskite crystalline silicon stacked cell, which simplifies the processing technology of the perovskite crystalline silicon stacked cell. Moreover, a second packaging layer is provided between the cover plate and the anti-reflection packaging layer, and the cover plate and the anti-reflection packaging layer are separated by the second packaging layer, so as to avoid direct contact between the cover plate and the anti-reflection packaging layer and damage to the anti-reflection structure on the anti-reflection packaging layer, thereby ensuring a good anti-reflection effect of the anti-reflection packaging layer.

[0026] Please refer to Figure 1 The utility model provides a laminated solar cell assembly, comprising:

[0027] Back panel 1;

[0028] A first encapsulation layer 2 disposed on the back plate 1;

[0029] A perovskite crystalline silicon stacked cell 3 disposed on the first encapsulation layer 2;

[0030] An anti-reflection packaging layer 4 is provided on the perovskite crystalline silicon stacked cell 3, wherein the anti-reflection packaging layer 4 includes an anti-reflection region 41 provided with an anti-reflection structure 40, and a non-reflection region (not numbered) provided outside the anti-reflection region 41;

[0031] A second packaging layer 5 is disposed on the non-reflective region, and the second packaging layer 5 is hollowed out corresponding to the anti-reflective region 41; and

[0032] The cover plate 6 is disposed on the second packaging layer 5 , and the cover plate 6 is spaced apart from the anti-reflection region 41 .

[0033] The stacked solar cell assembly of the embodiment of the utility model is provided with an anti-reflection encapsulation layer 4. When preparing the perovskite crystalline silicon stacked cell 3, there is no need to prepare an anti-reflection film. Only the anti-reflection encapsulation layer 4 needs to be used for encapsulation of the perovskite crystalline silicon stacked cell 3, so that the light reflection of the perovskite crystalline silicon stacked cell 3 can be reduced, thereby simplifying the processing technology of the perovskite crystalline silicon stacked cell 3. Moreover, a second encapsulation layer 5 is provided between the cover plate 6 and the anti-reflection encapsulation layer 4, and the area of ​​the second encapsulation layer 5 corresponding to the anti-reflection area 41 is hollowed out so that the area of ​​the second encapsulation layer 5 corresponding to the anti-reflection area 41 can transmit light. The second encapsulation layer 5 is used to space the cover plate 6 from the anti-reflection encapsulation layer 4, so as to avoid direct contact between the cover plate 6 and the anti-reflection encapsulation layer 4 and damage the anti-reflection structure 40 on the anti-reflection encapsulation layer 4, thereby ensuring a good anti-reflection effect of the anti-reflection encapsulation layer 4.

[0034] In the embodiment of the utility model, the specific preparation process of the anti-reflection packaging layer 4 includes: using an etching solution to etch an anti-reflection structure on a silicon wafer, cleaning the silicon wafer, and using the silicon wafer as a mold; contacting the anti-reflection packaging layer 4 with the silicon wafer mold, and hot pressing and demolding to obtain an anti-reflection packaging layer 4 with an anti-reflection structure on the surface. The preparation process of the anti-reflection packaging layer 4 is simple and the implementation cost is low.

[0035] As an embodiment of the utility model, the back plate 1 and the cover plate 6 are one or a combination of glass, PC (Polycarbonate), PVF (polyvinyl fluoride), and ETFE (ethylene-tetrafluoroethylene copolymer). The specific materials of the back plate 1 and the cover plate 6 can be selected according to actual needs.

[0036] As an embodiment of the present invention, the anti-reflection structure 40 is one or a combination of a pyramid texture, a sawtooth texture or a hemispherical texture. Preferably, the anti-reflection structure 40 is a pyramid texture, which is easy to process and has a good anti-reflection effect.

[0037] As an embodiment of the present invention, the anti-reflection encapsulation layer 4 is EVA (Ethylene Vinyl Acetate Copolymer) material or POE (Polyolefin Elastomer) material. In practical applications, the anti-reflection encapsulation layer 4 can be EVA material, POE material, or a mixture of EVA material and POE material.

[0038] In practical applications, the thickness of the anti-reflection encapsulation layer 4 can also be flexibly set as needed, and the specific thickness is not limited. For example, the thickness of the anti-reflection encapsulation layer 4 is 60-100 nm, and the refractive index is 1.9-2.5, which can achieve good anti-reflection performance of the anti-reflection encapsulation layer 4 and enhance the absorption rate of the perovskite crystalline silicon stacked cell 3 to sunlight.

[0039] As an embodiment of the utility model, it also includes:

[0040] The edge sealing layer 7 is arranged around the outer side surfaces of the first encapsulation layer 2 , the perovskite crystalline silicon stacked cells 3 , the anti-reflection encapsulation layer 4 and the second encapsulation layer 5 , and the edge sealing layer 7 is bonded to the back plate 1 and the cover plate 6 .

[0041] In this embodiment, the edge sealing layer 7 is used to encapsulate the first encapsulation layer 2, the perovskite crystalline silicon stacked cell 3, the anti-reflection encapsulation layer 4 and the outer side of the second encapsulation layer 5, the gap between the back plate 1 and the first encapsulation layer 2, and the gap between the cover plate 6 and the second encapsulation layer 5, to ensure a good sealing effect of the perovskite stacked cell assembly.

[0042] As an embodiment of the present invention, the edge sealing layer 7 is one or a combination of PIB (Polyisobutylene) or butyl rubber.

[0043] In practical applications, the edge sealing layer 7 can be made of PIB material, or butyl rubber material, or a mixture of PIB material and butyl rubber material.

[0044] As an embodiment of the present invention, the first encapsulation layer 2 and the second encapsulation layer 5 are EVA (Ethylene Vinyl Acetate Copolymer) material or POE (Polyolefin Elastomer) material. The first encapsulation layer 2 and the second encapsulation layer 5 are EVA material or POE material.

[0045] As an embodiment of the utility model, the perovskite crystalline silicon stacked cell 3 includes a crystalline silicon bottom cell 31, a conductive bonding layer 32 arranged on the crystalline silicon bottom cell 31, and a perovskite top cell 33 arranged on the conductive bonding layer 32, and the anti-reflection packaging layer 4 is arranged on the top of the perovskite top cell 33.

[0046] Among them, the crystalline silicon bottom cell 31 can specifically be a silicon heterojunction cell, and the silicon heterojunction cell can include a bottom electrode, a transparent conductive layer, a boron-doped nanocrystal or a boron-doped nanocrystalline silicon oxide layer, a first intrinsic amorphous silicon, a silicon substrate, a second intrinsic amorphous silicon, a phosphorus-doped nanocrystal or a phosphorus-doped nanocrystalline silicon oxide layer, which are arranged in sequence from bottom to top.

[0047] In this embodiment, the phosphorus-doped nanocrystal or phosphorus-doped nanocrystalline silicon oxide layer on the front of the silicon heterojunction cell can reduce parasitic absorption and increase current; the boron-doped nanocrystal or boron-doped nanocrystalline silicon oxide layer on the back of the silicon heterojunction cell can reduce contact resistance and increase current. The first intrinsic amorphous silicon and the second intrinsic amorphous silicon respectively play a passivation role to improve cell efficiency. Of course, the crystalline silicon bottom cell 31 can also be other crystalline silicon cells.

[0048] As an embodiment of the utility model, the perovskite top cell 33 includes a hole transport layer 331, a perovskite layer 332, an electron transport layer 333, a transparent conductive layer 334, and a top electrode 335 arranged in sequence from bottom to top, and the anti-reflection packaging layer 4 is stacked on the top electrode 335.

[0049] As an embodiment of the present invention, the material of the transparent conductive layer 334 includes but is not limited to ITO (IndiumTinOxide), IZO (IndiumZincOxide) or AZO (AluminumdopedZincOxide).

[0050] As an embodiment of the present invention, the material of the hole transport layer 331 includes but is not limited to Spiro-OMeTAD (Chinese name: 2,2',7,7'-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene), PTAA (Chinese name: poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine]), PEDOT:PSS (Chinese name: (poly(3,4-ethylenedioxythiophene):polystyrene sulfonate)) or NiOx.

[0051] As an embodiment of the present invention, the material of the electron transport layer 333 includes but is not limited to SnO2, ZnO, TiO2, PCBM (Chinese name: fullerene derivative) or C60.

[0052] As an embodiment of the present invention, the material of the transparent conductive layer 334 includes but is not limited to ITO or IZO.

[0053] As an embodiment of the present invention, the material of the top electrode 335 includes but is not limited to Au, Ag, Cu or Al.

[0054] The packaging process of the laminated solar cell module of the embodiment of the utility model is as follows: the first packaging layer 2, the perovskite crystalline silicon laminated cell 3, the anti-reflection packaging layer 4, and the second packaging layer 5 are placed on the back plate 1 in sequence, butyl glue is applied to the edge of the back plate 1 as an edge sealing layer 7, and then the cover plate 6 is covered, and hot pressing packaging is performed to obtain the perovskite laminated cell module.

[0055] The embodiment of the utility model also provides a photovoltaic system, including the laminated solar cell assembly of the above embodiment. By setting the above laminated solar cell assembly, the photovoltaic system can reduce the processing technology of the perovskite crystalline silicon laminated cell, reduce the processing difficulty and cost, and because the anti-reflection encapsulation layer 4 can maintain a good anti-reflection effect, the photovoltaic system has a high light conversion efficiency and a high power generation efficiency.

[0056] A laminated solar cell assembly provided by an embodiment of the utility model is provided with an anti-reflection encapsulation layer 4. It only needs to use the anti-reflection encapsulation layer 4 to encapsulate the perovskite crystalline silicon laminated cell 3, so as to reduce the light reflection of the perovskite crystalline silicon laminated cell 3. There is no need to prepare an anti-reflection film when preparing the perovskite crystalline silicon laminated cell 3, thereby simplifying the processing technology of the perovskite crystalline silicon laminated cell 3; moreover, a second encapsulation layer 5 is provided between the cover plate 6 and the anti-reflection encapsulation layer 4, and the second encapsulation layer 5 corresponding to the anti-reflection area 41 is hollowed out so that the area of ​​the second encapsulation layer 5 corresponding to the anti-reflection area 41 can be light-transmissive. At the same time, the second encapsulation layer 5 separates the cover plate 6 from the anti-reflection encapsulation layer 4 to avoid direct contact between the cover plate 6 and the anti-reflection encapsulation layer 4 and damage to the anti-reflection structure 40 on the anti-reflection encapsulation layer 4, so that the anti-reflection encapsulation layer 4 maintains a good anti-reflection effect.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laminated solar cell module, characterized in that: include: Back panel; a first packaging layer disposed on the backplane; A perovskite crystalline silicon stacked cell disposed on the first packaging layer; An anti-reflection packaging layer is provided on the perovskite crystalline silicon stacked cell, wherein the anti-reflection packaging layer includes an anti-reflection area provided with an anti-reflection structure, and a non-reflection area provided on the periphery of the anti-reflection area; A second packaging layer is disposed on the non-reflective area, wherein the second packaging layer is hollowed out corresponding to the anti-reflective area; and A cover plate is disposed on the second packaging layer, wherein the cover plate is spaced apart from the anti-reflection region.

2. The laminated solar cell assembly according to claim 1, characterized in that: The anti-reflection structure is one or a combination of a pyramid-shaped texture, a sawtooth-shaped texture or a hemispherical texture.

3. The laminated solar cell assembly according to claim 1, characterized in that: The anti-reflection packaging layer is made of EVA material or POE material.

4. The laminated solar cell assembly according to claim 1, characterized in that: Also includes: The edge sealing layer is arranged around the outer side surfaces of the first packaging layer, the perovskite crystalline silicon stacked cell, the anti-reflection packaging layer and the second packaging layer, and the edge sealing layer is bonded to the back plate and the cover plate.

5. The laminated solar cell assembly according to claim 4, characterized in that: The edge sealing layer is one or a combination of PIB and butyl rubber.

6. The laminated solar cell assembly according to claim 1, characterized in that: The back plate and the cover plate are made of one or a combination of glass, PC, PVF, and ETFE.

7. The laminated solar cell module according to claim 1, characterized in that: The first encapsulation layer and the second encapsulation layer are made of EVA material or POE material.

8. The laminated solar cell assembly according to claim 1, characterized in that: The perovskite crystalline silicon stacked cell includes a crystalline silicon bottom cell, a conductive bonding layer arranged on the crystalline silicon bottom cell, and a perovskite top cell arranged on the conductive bonding layer, and the anti-reflection packaging layer is arranged on the top of the perovskite top cell.

9. The laminated solar cell assembly according to claim 8, characterized in that: The perovskite top cell includes a hole transport layer, a perovskite layer, an electron transport layer, a transparent conductive layer, and a top electrode arranged in sequence from bottom to top, and the anti-reflection packaging layer is stacked on the top electrode.

10. A photovoltaic system, characterized in that: It comprises the laminated solar cell module as claimed in any one of claims 1 to 9.

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