Heterojunction solar cell and photovoltaic module
A solar cell and heterojunction technology, applied in photovoltaic power generation, electrical components, circuits, etc., can solve the problem of difficulty in improving the bifacial ratio of heterojunction solar cells, and achieve the effect of improving light transmittance and realizing short-circuit current.
Pending Publication Date: 2022-04-15
CSI SOLAR TECH (JIAXING) CO LTD
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Problems solved by technology
[0005] Based on the design method of the prior art, it is difficult to improve the bifaciality of the involved heterojunction solar cells
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[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0035] refer to figure 1 As shown, the heterojunction solar cell involved in the present invention includes: a silicon substrate 10, a first intrinsic amorphous layer 21, a first doped layer 31 and a first transparent The conductive film layer 41 is sequentially laminated with the second intrinsic amorphous layer 22 , the second doped layer 32 and the second transparent conductive film layer 42 disposed on the backlight surface of the silicon substrate 10 .
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Abstract
The invention provides a heterojunction solar cell and a photovoltaic module, in the related heterojunction solar cell, a second transparent conductive film layer of a backlight surface comprises a first TCO film and a second TCO film arranged on one surface of the first TCO film, the dopant content in the first TCO film is smaller than that in the second TCO film, and the dopant content in the second TCO film is smaller than that in the first TCO film. The thickness of the first TCO film is greater than that of the second TCO film; based on the specific structure of the heterojunction solar cell, the light transmission of the second transparent conductive film layer can be improved while the contact resistance between the second transparent conductive film layer and other film layers is prevented from being increased to a great extent, and then the improvement of the short-circuit current of the back surface of the heterojunction solar cell and the optimization of the double-sided rate are realized.
Description
technical field [0001] The invention relates to the field of photovoltaic manufacturing, in particular to a heterojunction solar cell and a photovoltaic module. Background technique [0002] Heterojunction solar cells are currently a relatively efficient crystalline silicon solar cell, which combines the characteristics of crystalline silicon cells and silicon-based thin-film cells, and has the advantages of short manufacturing process, low process temperature, high conversion efficiency and large power generation. Due to the small temperature degradation coefficient of heterojunction solar cells and double-sided power generation, under the same area conditions, the annual power generation can be 15-30% higher than that of ordinary polycrystalline silicon cells, so it has great market potential. [0003] As the outermost layer of the heterojunction solar cell film structure, the transparent conductive film is the first barrier for incident light to enter the interior of the ...
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IPC IPC(8): H01L31/072H01L31/0216
CPCY02E10/50
Inventor 张美荣姚铮吴华德张达奇吴坚蒋方丹
Owner CSI SOLAR TECH (JIAXING) CO LTD