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Texturing method for polycrystalline silicon solar cells

A solar cell and polysilicon technology, which is applied to the growth of polycrystalline materials, chemical instruments and methods, and crystal growth, can solve the problems of unfavorable photoelectric conversion efficiency of polysilicon solar cells and poor uniformity of the suede surface of silicon wafers, etc. The effect of conversion efficiency

Active Publication Date: 2011-10-12
JETION SOLAR HLDG
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Problems solved by technology

However, after the polycrystalline silicon solar cell is textured according to the prior art, the uniformity of the textured surface of the obtained silicon wafer is relatively poor, which is not conducive to improving the photoelectric conversion efficiency of the polycrystalline silicon solar cell.

Method used

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  • Texturing method for polycrystalline silicon solar cells
  • Texturing method for polycrystalline silicon solar cells
  • Texturing method for polycrystalline silicon solar cells

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Embodiment Construction

[0035] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0036] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

[0037] As mentioned in the background technology section, according to the prior art, after texturizing polycrystalline silicon solar cells (which may be referred to as polycrystalline silicon wafers or silicon wafers), the uniformity of the textured surface of the obtained silicon wafers is poor, which is not c...

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Abstract

The embodiment of the invention discloses a texturing method for polycrystalline silicon solar cells, which comprises the following steps of: texturing the polycrystalline silicon solar cells by using mixed solution of nitric acid and hydrofluoric acid for the first time; and texturing the polycrystalline silicon solar cells by using mixed solution of nitric acid and hydrofluoric acid for the second time, wherein a mass concentration ratio of the nitric acid to the hydrofluoric acid during the second-time texturing of the polycrystalline silicon solar cell is less than that of the nitric acidto the hydrofluoric acid during the first-time texturing of the polycrystalline silicon solar cells. By the method provided by the invention, a uniform textured structure can be formed on the surfaceof the polycrystalline silicon solar cells so as to improve the photoelectric conversion efficiency of the polycrystalline silicon solar cells.

Description

technical field [0001] The invention relates to the technical field of solar cell manufacturing technology, and more specifically, relates to a texturing method for polycrystalline silicon solar cells. Background technique [0002] A solar cell, also known as a photovoltaic cell, is a semiconductor device that converts the sun's light energy directly into electrical energy. Because it is a green product, does not cause environmental pollution, and is a renewable resource, solar cells are a new energy source with broad development prospects in today's energy shortage situation. [0003] At present, the manufacturing process of solar cells has been standardized, and its main steps are as follows: [0004] 1. Texturing: Through chemical reaction, the originally bright silicon wafer surface (including the front and back) forms an uneven structure to prolong the propagation path of light on its surface, thereby improving the light absorption efficiency of solar cells. [0005] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B33/10C30B29/06
CPCY02P70/50
Inventor 王守志
Owner JETION SOLAR HLDG
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