Production method of solar cell and solar cell

A technology of solar cells and solar cells, applied in the field of solar photovoltaics, can solve the problems of low conversion efficiency of solar cells, achieve good masking effect, and improve efficiency

Inactive Publication Date: 2021-04-09
LONGI SOLAR TECH (TAIZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a method for preparing a solar cell and a solar cell, aiming at avoiding the problem that the conversion efficiency of the solar cell is low due to the preparation of a protective oxide layer during the preparation of the solar cell

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  • Production method of solar cell and solar cell
  • Production method of solar cell and solar cell
  • Production method of solar cell and solar cell

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Embodiment Construction

[0047] 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 some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0048] figure 1 A flow chart showing the steps of the first solar cell manufacturing method provided by the embodiment of the present invention, as figure 1 As shown, the method may include:

[0049] Step 101, providing a silicon substrate.

[0050] In the embodiment of the present invention, the silicon substrate may be an N-type silicon substrate or a P-type silicon substrate, which is not specifically limited in the embodiment of the present inven...

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Abstract

The invention provides a production method of a solar cell, and relates to the technical field of solar photovoltaics. In the process of producing the solar cell, an average size of pyramids in a textured structure of a first surface of a silicon substrate is controlled to be larger than or equal to 2 microns and smaller than 5 microns, and due to the fact that the average size of the pyramids is large and the pyramids are distributed dispersedly, the reflectivity of the silicon substrate is ensured to be low and light absorption is good through a pyramid structure. Damage to the textured structure in the process of forming a barrier oxide layer with a thickness greater than 15nm on the textured structure can be avoided, at the moment, the thickness of the barrier oxide layer can achieve a good mask effect, the influence of the thick oxide layer on the performance of the solar cell is also avoided, and the efficiency of the solar cell is significantly improved.

Description

technical field [0001] The invention relates to the field of solar photovoltaic technology, in particular to a method for preparing a solar cell and the solar cell. Background technique [0002] In the preparation process of silicon-based solar cells, in order to reduce the surface reflectance of silicon wafers, increase the absorption of light, so as to improve the efficiency of solar cells. Usually, chemical etching is used to prepare a pyramid-like suede on the surface of the silicon wafer. The pyramid's suede can reflect and refract light twice, thereby increasing the absorption of light. In order to reduce the reflectivity of the suede, you can Reduce the size of the pyramids in the suede, thereby enhancing the secondary reflection and refraction of light. [0003] In the process of solar cell preparation, in order to avoid the pyramidal structure of the textured surface from being destroyed in the subsequent process, it is usually necessary to set an oxide layer on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0236H01L31/06H01L31/18
CPCH01L31/02363H01L31/06H01L31/1804Y02P70/50Y02E10/547
Inventor 童洪波丁超徐新星张洪超李华靳玉鹏
Owner LONGI SOLAR TECH (TAIZHOU) CO LTD
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