Formula of single-crystal silicon texturing additive containing polysaccharide and alcohol

Abstract

The invention relates to an additive of a single-crystal silicon texturing liquid. The components of the additive are a polysaccharide, an alcohol, an organic acid sodium salt, sodium silicate and deionized water, wherein the polysaccharide is one or a mixture of more of water-soluble chitin, polyfructose, water-soluble starch, beta-cyclodextrin, and dextrin, and a weight ratio of the polysaccharide to water is 0.1-1.0:100; the alcohol is a lower alcohol, and is one or a mixture of more of n-propanol, 1,2-propanediol, n-butanol, 1,2-butanediol and tert-butanol, and a weight ratio of the alcohol to water is 1.0-3.0:100; the organic acid sodium salt is one or a mixture of more of sodium acetate, sodium formate, sodium propionate, sodium benzoate, and sodium phenylacetate, and a weight ratioof the organic aicd sodium salt to water is 0.1-1.0:100; and a weight ratio of sodium silicate to water is 0.1-1.0:100. A formula of a single-crystal silicon surface texturing agent is as follows: 30.0-50.0 mL of a NaOH solution with a concentration of 30% by weight is added into 1 L of deionized water, and 8.0-18.0 mL of the additive is added.

Description

technical field [0001] The invention belongs to the technical field of monocrystalline silicon wafers for solar cells, and in particular relates to the effect of the types and contents of polysaccharides and alcohols on the texturing of monocrystalline silicon wafers. Background technique [0002] Renewable energy refers to energy that can be continuously regenerated and reused in the natural environment, and is inexhaustible and inexhaustible. At present, the renewable energy sources discovered mainly include solar energy, water energy, wind energy, biomass energy, wave energy, tidal energy, and geothermal energy. The impact of renewable energy on the environment is harmless or minimal, and the resources are widely distributed, suitable for local development and utilization. Solar energy is the most basic energy in our world. All biomass energy, water energy, geothermal energy, and wind energy come from solar energy. Every year, the earth can obtain 173,000TW of energy fr...

AI Technical Summary

Problems solved by technology

If the degree of corrosion is too low, the air bubbles on the surface of the silicon wafer cannot be released effectively, which will lead to the inability to form uniform surface grooves and pyramid structures on the entire surface of the silicon wafer, which will lead to high reflectivity of the silicon wafer to sunlight; if the degree of corrosion is too high , the already formed pyramid structure will be destroyed and eventually become a relatively large pyramid structure, which is also not conducive to reducing the light reflectivity of the silicon wafer

Therefore, the degree of corrosion is very important for the texture reaction. Finding the optimal corrosion degree has an important impact on the formation of the pyramid structure, and the pyramid structure will also affect the light absorption effect of the texture, and ultimately affect the photoelectric conversion efficiency of the solar cell.

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