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Preparation method of heterojunction solar cell

A solar cell and heterojunction technology, which is applied in the field of solar cells to achieve the effects of simple process, short process and favorable for thinning

Active Publication Date: 2021-10-01
ANHUI HUASUN ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the present invention provides a method for preparing a heterojunction solar cell and a heterojunction solar cell to improve the photoelectric conversion efficiency

Method used

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  • Preparation method of heterojunction solar cell
  • Preparation method of heterojunction solar cell
  • Preparation method of heterojunction solar cell

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Embodiment 1

[0036] refer to Figure 2-Figure 3 , this embodiment provides a method for preparing a heterojunction solar cell, including the following steps in sequence:

[0037] S100 provides a semiconductor substrate 1 .

[0038] S200 pre-cleaning.

[0039] S300 performs double-sided texturing on the semiconductor substrate 1 .

[0040] S400 first wet chemical cleaning.

[0041] S500 forming a mask layer on the front surface 11 of the semiconductor substrate 1 .

[0042] S600 performs etching on the back surface 12 of the semiconductor substrate 1 .

[0043] S700 second wet chemical cleaning.

[0044] Each step of the method for preparing the heterojunction solar cell will be described in detail below.

[0045]S100 provides a semiconductor substrate 1 .

[0046] In a heterojunction solar cell, the semiconductor substrate 1 used is usually an N-type silicon wafer.

[0047] S200 pre-cleaning.

[0048] In this embodiment, before performing double-sided texturing on the semiconducto...

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Abstract

The invention provides a preparation method of a heterojunction solar cell. The preparation method comprises the following steps of providing a semiconductor substrate, performing double-sided texturing treatment on the semiconductor substrate, forming a mask layer on the front surface of the semiconductor substrate after performing double-sided texturing treatment on the semiconductor substrate, after the mask layer is formed, carrying out corrosion treatment on the back surface of the semiconductor substrate, and after the corrosion treatment, cleaning the back surface of the semiconductor substrate, and removing the mask layer on the front surface of the semiconductor substrate while cleaning the back surface of the semiconductor substrate. According to the preparation method of the heterojunction solar cell, the mask layer formed on the single side after double-sided texturing is removed in the cleaning step after corrosion treatment, single-side corrosion of the semiconductor substrate can be achieved and the semiconductor substrate with the single-side textured surface can be formed without independently setting a process step for removing the mask, the process is simple, and the flow is short.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a method for preparing heterojunction solar cells. Background technique [0002] Solar cells have the advantages of clean and pollution-free, renewable, and stable working performance. According to the difference of solar cell structure, preparation process and materials used, solar cells are divided into different types. Including: silicon-based solar cells, multi-component compound thin-film solar cells, polymer multilayer modified electrode solar cells, organic solar cells, etc. Among them, silicon-based solar cells are the most mature, including P-type solar cells, N-type solar cells, For example, heterojunction solar cells, etc. Taking heterojunction solar cells as an example, semiconductor layers, transparent conductive layers and metal electrodes are prepared on one or both sides of the N-type substrate to form cells, and then multiple cells are interconnected and packaged to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/20
CPCH01L31/202H01L31/208Y02P70/50Y02E10/50
Inventor 龚道仁张良周肃徐晓华王文静姚真真魏文文
Owner ANHUI HUASUN ENERGY CO LTD