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Technology for cleaning solar monocrystalline wafer

A monocrystalline silicon wafer and solar energy technology, applied in liquid cleaning methods, cleaning methods and utensils, sustainable manufacturing/processing, etc., can solve problems such as chromatic aberration, solar silicon wafer white spot, affecting yield and product quality, etc. Achieve the effect of preventing white spots, improving yield and product quality

Inactive Publication Date: 2011-11-02
ZHEJIANG XINGYU ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are too many chemicals, metal impurities, acid and alkali residues on the surface of the monocrystalline silicon wafer cleaned by this process, which will cause white spots and chromatic aberrations when the solar silicon wafer is textured, reduce the conversion efficiency of the cell, and even fail to reach To the technical requirements of the cell, affect the yield and product quality

Method used

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Examples

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with specific examples.

[0012] The present embodiment carries out according to the following steps:

[0013] 1. According to the routine, the solar monocrystalline silicon wafers are sprayed, degummed, rinsed with tap water, super-washed with detergent, and rinsed with pure water in sequence;

[0014] 2. Make a mixed solution with a volume percentage of 1:0.4-0.6% by ionic water with a resistance of more than 15 megaohms and hydrofluoric acid above reagent grade, and then place the solar monocrystalline silicon wafer after step 1. Soak in the mixture for more than 3 minutes.

[0015] 3. Make a mixed solution with a volume percentage of 1:0.4-0.6% by the ionized water with a resistance of more than 15 megaohms and the hydrogen peroxide with analytical purity, and then put the solar monocrystalline silicon chip after step 2 into the Soak in the mixture for 3 minutes or more.

[0016] 4. Rinse the so...

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PUM

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Abstract

The invention relates to a technology for cleaning a solar monocrystalline wafer. The technology is characterized by comprising the following steps: carrying out spraying, degumming, tap-water washing, cleaning agent washing and pure water washing on a solar monocrystalline wafer in sequence; soaking the processed solar monocrystalline wafer in a mixed solution of ionized water and hydrofluoric acid for a while; then soaking in a mixed solution of ionized water and hydrogen peroxide for a while; carrying out pure water washing again; and finally drying. The technology is utilized to sufficiently wash chemicals, metal impurities and acid and base residuals away from the surface of the solar monocrystalline wafer, and prevent chromatic aberration due to hickie on the solar monocrystalline wafer when the solar monocrystalline wafer is textured, thus improving the yield and the product quality.

Description

technical field [0001] The invention relates to a cleaning process for a solar monocrystalline silicon chip. Background technique [0002] At present, the technical route of the cleaning process of solar monocrystalline silicon wafers is: spraying, degumming, rinsing with tap water, super-washing with cleaning agent, rinsing with pure water, and spin-drying. There are too many chemicals, metal impurities, acid and alkali residues on the surface of the monocrystalline silicon wafer cleaned by this process, which will cause white spots and chromatic aberrations when the solar silicon wafer is textured, reduce the conversion efficiency of the cell, and even fail to reach To the technical requirements of the cell, affect the yield and product quality. Contents of the invention [0003] The object of the present invention is to provide a cleaning process for solar monocrystalline silicon wafers that can improve the surface cleanliness of solar silicon wafers. [0004] The tec...

Claims

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Application Information

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IPC IPC(8): H01L31/18B08B3/00
CPCY02P70/50
Inventor 牛小群
Owner ZHEJIANG XINGYU ENERGY TECH
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