High-efficiency heterojunction battery structure
A heterojunction battery and high-efficiency technology, applied in the direction of circuits, electrical components, semiconductor devices, etc., can solve problems such as inability to continue to break through, natural defects in the structure, and large frontal recombination problems, so as to improve the problem of dark saturation current recombination and improve battery performance. Opening voltage and cell efficiency, effects of reduced diffusion layer recombination and metal contact recombination
Pending Publication Date: 2022-07-01
SUZHOU TALESUN SOLAR TECH CO LTD
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Problems solved by technology
[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a high-efficiency heterojunction battery structure to solve the problem of low battery efficiency and failure to continue due to the large frontal recombination problem caused by natural structural defects in the current N-Topcon battery structure. breakthrough problem
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[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0025] The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.
[0026] like figure 1 As shown, an embodiment of the present invention provides a high-efficiency heterojunction cell structure, which is stacked and arrange...
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Abstract
The invention relates to a high-efficiency heterojunction cell structure, which is sequentially stacked from bottom to top: a back cell structure; the middle battery structure is provided with an n-type monocrystalline silicon layer; and the front cell structure comprises an intrinsic amorphous silicon layer, a p-type doped hydrogenated silicon oxide layer, a p-type doped amorphous silicon layer and a TCO layer which are sequentially stacked from bottom to top. By means of the arrangement, the problems that in an existing N-Topcon battery structure, due to the natural defects of the structure, the front face recombination problem is large, the battery efficiency is low, and breakthrough cannot be continued can be solved.
Description
technical field [0001] The present invention relates to the technical field of stacked solar cells, in particular to a high-efficiency heterojunction cell structure. Background technique [0002] A solar cell, or photovoltaic cell, is an electrical device that converts light energy directly into electrical energy through the photovoltaic effect. Among them, the TOPCon solar cell (Tunnel Oxide Passivated Contact) is a solar cell using an ultra-thin oxide layer as a passivation layer structure on the back of the cell. [0003] At present, in the industry, the mass production efficiency of N-Topcon batteries has been continuously improved, and the open circuit voltage of the battery is generally around 700mV, which has gradually approached its theoretical limit. The efficiency loss of existing N-Topcon cells generally comes from the front of the cell, including boron diffusion recombination on the front and Ag / Si metal contact recombination on the front. However, the above pro...
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IPC IPC(8): H01L31/0725H01L31/074
CPCH01L31/0725H01L31/074
Inventor 赵保星张树德符欣连维飞魏青竹倪志春
Owner SUZHOU TALESUN SOLAR TECH CO LTD