Deoiling and dewaxing monocrystalline silicon wafer texturing liquid and preparing method thereof

Abstract

The invention discloses deoiling and dewaxing monocrystalline silicon wafer texturing liquid. The deoiling and dewaxing monocrystalline silicon wafer texturing liquid is characterized by being prepared from, by weight, 0.5-1 part of sodium hydroxide, 0.5-1 part of borax, 3-5 parts of auxiliaries, 0.3-0.5 part of potassium cocamidopropyl glycinate, 0.3-0.5 part of polyvinylpyrrolidone, 0.1-0.2 part of sodium stearate, 0.1-0.2 part of octyl phenol polyoxyethylene ether, 0.5-1 part of tricaprylin and 80-100 parts of water. The uniformity and repeatability of the texturing technology are improved by means of the texturing liquid, and the textured face density is increased, so that the efficiency of a solar cell is improved, and product quality is improved; the deoiling and dewaxing performance is high, the effect of treating fingerprints, oil dirt, white point and other raw materials is excellent, and the texturing liquid is free from IPA, which is beneficial for environmental protection and human health.

Description

technical field [0001] The invention relates to silicon wafer texturing technology, in particular to a degreasing and waxing 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 meth...

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.

In addition, texturing has high requirements on the surface state of the original silicon wafer. Oil and stain residue on the surface of the silicon wafer will cause white spots on the surface of the silicon wafer and affect product quality.