Monocrystal silicon wafer flocking process liquid and preparation method thereof

Abstract

The invention discloses monocrystal silicon wafer flocking process liquid and a preparation method thereof. The monocrystal silicon wafer flocking process liquid contains the following raw materials in parts by weight: 62-86 parts of industrial pure water, 5-15 parts of electronic-grade potassium hydroxide, 5-15 parts of CP-grade high-radix loop materials and 4-8 parts of electronic-grade sodium silicate. The preparation method of the monocrystal silicon wafer flocking process comprises the following steps: adding 10-30 parts of industrial pure water and 5-15 parts of electronic-grade potassium hydroxide or sodium hydroxide or the mixture of the two into a reactor, stirring and dissolving; adding 5-15 parts of CP-grade high-radix loop materials, stirring and dissolving; adding 4-8 parts of electronic-grade sodium silicate or potassium silicate or the mixture of the two, stirring and dissolving; adding 32-76 parts of hot pure water of 50-80 DEG C, stirring; and naturally cooling and packaging. The monocrystal silicon wafer flocking process liquid adopted the technical scheme has the advantages of removing monocrystal silicon wafer piebald, improving conversion efficiency of batteryplates, lowering production cost of flocking surface and improving quality stability of the flocking surface.

Description

technical field [0001] The invention relates to a monocrystalline silicon chip flocking process liquid and a preparation method thereof. Background technique [0002] Silicon-based solar cells in today's world can be divided into two camps according to materials: polycrystalline and monocrystalline solar cells. The suede process is the first process in the solar cell process, and it is also a very critical process. Generally speaking, the reflectance of silicon-based materials for solar cells is 30-35%, which means that 100% of solar light is projected onto the silicon-based surface, and about 30-35% of solar light is reflected, and this part cannot be effectively used The energy of sunlight. The main function of the suede process is to minimize the reflectivity of silicon-based materials in order to maximize the use of the energy provided by sunlight. At present, the suede process can be divided into acid process and alkali process according to silicon-based materials. ...

AI Technical Summary

Problems solved by technology

However, the biggest defect of the traditional alkali suede process is that due to the large amount of ethylene-propanol used, its low boiling point and volatile chemical properties cause instability between batches of the suede process, and a large number of mottled pieces often appear. And seriously affect the appearance and power generation efficiency of the cell