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Solar cell and texturing cleaning method thereof

A technology of solar cells and solar panels, applied in the field of solar cells, can solve the problems affecting the efficiency of cells, uneven distribution of suede surface, and reduced lifetime of minority carriers, and achieve the effects of enhancing light trapping effect, reducing surface area, and improving lifetime of minority carriers

Pending Publication Date: 2022-07-29
ZHEJIANG AIKO SOLAR ENERGY TECH CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the suede surface obtained by direct one-step texturing is often unevenly distributed, and there will be no flower flakes on the surface, whitening, or small broken crystals on the surface, which will lead to a decrease in the minority carrier life and seriously affect the efficiency of the cell.

Method used

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  • Solar cell and texturing cleaning method thereof
  • Solar cell and texturing cleaning method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] This embodiment provides a method for making and cleaning solar cells for texturing:

[0062] S1. Remove the contaminants on the surface of the solar cell panel to obtain a first solar cell panel.

[0063] S2, using the first alkali texturing solution at 70°C to perform the first alkali texturing treatment on the first solar cell panel for 300s to obtain a second solar cell panel;

[0064] The first alkaline texturing solution includes a first texturing agent, KOH and deionized water, and the mass ratio of the first texturing agent, KOH and deionized water is 0.7:7:100;

[0065] The first texturing agent comprises in parts by weight: 2 parts of sodium lignosulfonate, 0.002 parts of tartaric acid, 0.003 parts of boric acid and 100 parts of water.

[0066] S3, using the second alkali texturing solution at 70°C to perform the second alkali texturing treatment on the second solar cell panel for 180s to obtain a third solar cell panel;

[0067] The second alkaline texturin...

Embodiment 2

[0075] This embodiment provides a method for making and cleaning solar cells for texturing:

[0076] S1. Remove the contaminants on the surface of the solar cell panel to obtain a first solar cell panel.

[0077] S2, using the first alkali texturing solution at 70°C to perform the first alkali texturing treatment on the first solar cell panel for 300s to obtain a second solar cell panel;

[0078] The first alkaline texturing solution includes a first texturing agent, KOH and deionized water, and the mass ratio of the first texturing agent, KOH and deionized water is 0.7:7:100;

[0079] The first texturing agent comprises in parts by weight: 3 parts of sodium lignosulfonate, 0.005 part of tartaric acid, 0.001 part of boric acid and 100 parts of water.

[0080] S3, using the second alkali texturing solution at 70°C to perform the second alkali texturing treatment on the second solar cell panel for 180s to obtain a third solar cell panel;

[0081] The second alkaline texturing ...

Embodiment 3

[0089] This embodiment provides a method for making and cleaning solar cells for texturing:

[0090] S1. Remove the contaminants on the surface of the solar cell panel to obtain a first solar cell panel.

[0091] S2, using the first alkali texturing solution at 70°C to perform the first alkali texturing treatment on the first solar cell panel for 300s to obtain a second solar cell panel;

[0092] The first alkaline texturing solution includes a first texturing agent, KOH and deionized water, and the mass ratio of the first texturing agent, KOH and deionized water is 0.7:7:100;

[0093] The first texturing agent includes in parts by weight: 1 part of sodium lignosulfonate, 0.001 part of tartaric acid, 0.005 part of boric acid and 100 parts of water.

[0094] S3, using the second alkali texturing solution at 70°C to perform the second alkali texturing treatment on the second solar cell panel for 180s to obtain a third solar cell panel;

[0095] The second alkaline texturing so...

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Abstract

The invention discloses a solar cell texturing cleaning method comprising the following steps: removing pollutants on the surface of a solar cell panel to obtain a first solar cell panel; performing first alkali texturing treatment on the first solar cell panel by using a first alkali texturing solution to obtain a second solar cell panel; performing second alkali texturing treatment on the second solar cell panel by adopting second alkali texturing liquid to obtain a third solar cell panel; performing first acid texturing treatment on the third solar cell panel by using a first acid texturing solution to obtain a fourth solar cell panel; performing second acid texturing treatment on the fourth solar cell panel by adopting second acid texturing liquid to obtain a fifth solar cell panel; and the fifth solar cell panel is cleaned and dried, and texturing is completed. The obtained textured surface is low in reflectivity, long in minority carrier lifetime and high in cell conversion efficiency.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a solar cell and a method for making and cleaning the same. Background technique [0002] With the continuous advancement of high-efficiency solar cell research and development, the preparation of high-quality suede has become an indispensable technical link for high-conversion efficiency solar cells. The texturing method of high-efficiency cells has undergone the development of rough throwing + texturing to direct one-step texturing, and the suede has also developed from large suede to small suede, which improves the efficiency of solar cells by about 0.1%. However, the textured surface obtained by the current direct one-step texturing is often unevenly distributed, and the surface will have no pattern, whitish, or small fragmented crystals, which will reduce the life of the minority carrier and seriously affect the efficiency of the cell. SUMMARY OF THE INVENTION [0003...

Claims

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Application Information

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IPC IPC(8): H01L31/18H01L31/0236C30B33/10
CPCH01L31/1804H01L31/02363C30B33/10
Inventor 张陈明张欣盛健林纲正陈刚
Owner ZHEJIANG AIKO SOLAR ENERGY TECH CO LTD
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