Low-reflectivity monocrystalline silicon piece texture surface making liquid and preparation method thereof

A single crystal silicon wafer, low reflectivity technology, applied in the field of low reflectivity single crystal silicon wafer texturing liquid and its preparation, can solve the problems of easy volatilization of IPA, adverse effects on the environment, and harm to the human body, so as to improve product quality , Improve anisotropy, reduce the effect of surface reflectivity

Inactive Publication Date: 2015-12-02
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

Experimental program
Comparison scheme
Effect test

Embodiment Construction

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

[0016] A low-reflectivity single-crystal silicon wafer texturing liquid is prepared from the following weight (kg) components:

[0017] Sodium Hydroxide 0.5, Adjuvant 3, Hydroxyethyl Urea 2, Xanthan Gum 0.1, Sodium Lauroyl Sarcosinate 0.5, Decyl Glucoside 0.1, Isopropyl Myristate 0.1, N-β-Hydroxyethyl Ethyl Diamine triacetic acid 0.01, water 80;

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

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Abstract

The invention discloses low-reflectivity monocrystalline silicon piece texture surface making liquid. The low-reflectivity monocrystalline silicon piece texture surface making liquid is characterized by being prepared from, by weight, 0.5-1 part of sodium hydroxide, 3-5 parts of auxiliaries, 2-4 parts of ethoxy urea, 0.1-0.2 part of xanthan gum, 0.5-1 part of sodium lauroyl sarcosine, 0.1-0.2 part of decyl glucoside, 0.1-0.2 part of isopropyl myristate, 0.01-0.02 part of N-beta-hydroxyethyl ethylenediamine triacetate and 80-100 parts of water. According to the texture surface making liquid, the consistency and repeatability of a texture surface making process are effectively improved, the density of a fabric surface is increased, the dense fabric surface is formed, the surface reflectivity of silicon pieces is reduced, the photoelectric conversion efficiency is improved, and therefore the efficiency of a solar cell is improved, and product quality is improved. No IPA is included, environmental protection and human health are facilitated, and safety and environment friendliness are achieved.

Description

technical field [0001] The invention relates to a silicon wafer texturing technology, in particular to a low-reflectivity single crystal 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 the cost. 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 absorption of light, reduces the reflectivity, and helps to improve the performance of the battery. The low reflectivity of solar cells and ...

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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