Low-volatility monocrystalline silicon slice texturing solution and preparation method thereof

Abstract

The invention discloses a low-volatility monocrystalline silicon slice texturing solution which is characterized by being prepared from the following raw materials in parts by weight: 0.5-1 part of sodium hydroxide, 3-5 parts of an auxiliary agent, 0.2-0.4 part of sodium gluconate, 0.5-1 part of raffinose, 0.3-0.5 part of sodium citrate, 0.3-0.5 part of polyvinylpyrrolidone, 0.5-1 part of cocamidopropyl betaine, 0.3-0.5 part of propylene glycol alginate, 0.1-0.2 part of dimethyl silicone, and 80-100 parts of water. The texturing solution effectively improves the consistency and repeatability of a texturing technology, increases the textured surface density, thereby increasing the efficiency of solar cells and improving the quality of the product; and the texturing solution does not contain IPA and other volatile components, is beneficial to environmental protection and human health, is safe and environmentally friendly, can be reused more frequently, is strong in durability, and saves costs.

Description

technical field [0001] The invention relates to silicon wafer texturing technology, in particular to a low-volatility 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...

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.

The velvet liquid is highly volatile, so it needs to be added, which not only increases the production cost, but also has a negative impact on the velvet effect because the additional amount is difficult to control