Environment-friendly high-efficient silicon chip texturing agent and preparation method thereof

Abstract

The invention discloses an environment-friendly high-efficient silicon chip texturing agent, which is characterized by being prepared from the following raw materials in parts by weight: 1.5 to 2.5 parts of sodium hydroxide, 0.5 to 1 part of sodium cocoyl methyl taurate, 0.3 to 0.5 part of castor oil-polyoxyethylene ether, 0.2 to 0.4 part of hydroxyethylidene diphosphonic acid, 1 to 2 parts of sodium polyacrylate, 0.3 to 0.5 part of sodium oleate, 0.3 to 0.5 part of sodium silicate, 5 to 10 parts of texturing conditioning agent, and 100 to 150 parts of water. The provided silicon chip texturing agent can improve the texturing efficiency and stability of texturing technology, effectively improves the conversion efficiency of battery chips, reduces the texturing time, improves the production efficiency, reduces the using amount of chemical products, has a good degradable property, is pollution-free to the environment, reduces the production cost and wastewater treatment cost, and generates good economic benefits and environment benefits.

Description

technical field [0001] The invention relates to silicon wafer texturing technology, in particular to an environment-friendly and high-efficiency silicon wafer texturing agent and a preparation method thereof. Background technique [0002] Texturing is an important process in the production process of solar cells. Using the principle of anisotropic corrosion of single crystal silicon by low-concentration alkaline etching solution, a "pyramid" structure is formed on the surface of the silicon wafer to reduce the reflectivity of the silicon wafer surface and increase Absorb light, reduce reflectivity, and improve conversion efficiency of solar cells. At present, the conventional texturing process generally uses sodium hydroxide or potassium hydroxide, and adds a suitable mixed solution of isopropanol and sodium silicate for texturing. The isopropanol and other components used in the existing texturing liquid have large volatilization, poor environmental protection, short servi...

AI Technical Summary

Problems solved by technology

The isopropanol and other components used in the existing texturing liquid have large volatilization, poor environmental protection, short service life, large chemical consumption, low reaction controllability, and poor texturing repeatability, which directly affect product quality

Moreover, common texturing liquid generally has the problem of long texturing time, which cannot realize fast and efficient texturing, and the production efficiency is low