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Easy-to-clean monocrystalline silicon wafer texturing solution and preparation method thereof

A single-crystal silicon wafer, easy-to-clean technology, applied in chemical instruments and methods, crystal growth, post-processing details, etc., can solve the problems of easy volatilization of IPA, adverse environmental effects, human body hazards, etc., to improve product quality, enhance Anisotropic, easy-to-clean effect

Inactive Publication Date: 2015-12-16
CHINALAND SOLAR ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

IPA is quite toxic and harmful to the human body. At the same time, IPA is easy to volatilize in the process of making wool and has adverse effects on the environment.

Method used

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Examples

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Embodiment Construction

[0015] Non-limiting examples of the present invention are as follows:

[0016] An easy-to-clean texturing solution for monocrystalline silicon wafers, prepared from the following components by weight (kg):

[0017] Sodium Hydroxide 0.5, Mannitol 2, Additive 3, Triethanolamine 1, Fatty Acid Methyl Ethoxylate Sodium Sulfonate 0.5, Castor Oil Maleate 0.1, Disodium EDTA 1, Carboxymethyl Fiber Sodium 0.1, water 80;

[0018] Among them, the auxiliary agent is made of the following raw materials by weight (kg): saponin 10, nano-titanium dioxide 0.1, ammonium persulfate 0.1, vinyl acetate 1, sodium bicarbonate 0.2, dodecyl glucoside 1, water 100; The preparation method of the agent is to grind the saponins into powder, add the obtained saponins powder, sodium bicarbonate and lauryl glucoside into water at 80°C and 200r / min and stir for 4h, filter after cooling, and add acetic acid to the filtrate Vinyl ester and nano-titanium dioxide were dispersed ultrasonically for 5 minutes, then...

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PUM

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Abstract

The invention discloses an easy-to-clean monocrystalline silicon wafer texturing solution which is characterized by being prepared from raw materials in parts by weight as follows: 0.5-1 part of sodium hydroxide, 2-4 parts of mannitol, 3-5 parts of an aid, 1-2 parts of triethanolamine, 0.5-1 part of FMES, 0.1-0.2 parts of castor oil maleate, 1-2 parts of ethylene diamine tetraacetic acid disodium, 0.1-0.2 parts of sodium carboxymethyl cellulose and 80-100 parts of water. The texturing solution improves the consistency and repeatability of the texturing technology and increases the suede density, so that the solar cell efficiency is improved and the product quality is improved; the texturing solution contains no IPA (iso propyl alcohol), is safe, environment-friendly and easy to clean, is beneficial to environmental protection and human health, causes no pollution to silicon wafer surfaces and is beneficial to proceeding of the next procedure.

Description

technical field [0001] The invention relates to silicon wafer texturing technology, in particular to an easy-to-clean monocrystalline silicon wafer texturing liquid and a preparation method thereof. Background technique [0002] With the increasingly serious energy crisis, solar energy has become the most potential alternative energy in the future, and the solar cell industry is developing rapidly. One of the problems restricting its development is how to improve the photoelectric conversion efficiency of solar cells and reduce costs. Among them, the texturing process is an important step to improve the photoelectric conversion efficiency. [0003] Texturing is also called "surface texturing". The effective textured structure makes the incident light reflect and refract multiple times on the surface of the silicon wafer, which increases the light absorption and reduces the reflectivity, which helps to improve the performance of the battery. The chemical etching method is m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B33/10
Inventor 郭万东孟祥法董培才陈伏洲
Owner CHINALAND SOLAR ENERGY
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