Single crystalline silicon solar cell piece surface texture solution containing pomegranate bark extract and preparation method thereof

Abstract

The invention discloses a single crystalline silicon solar cell piece surface texture solution containing a pomegranate bark extract. The single crystalline silicon solar cell piece surface texture solution is prepared from, by weight, 0.1-0.2 part of xylitol, 1.5-2.5 parts of styrene, 1-2 parts of a 5-10% ammonium persulfate solution, 3-5 parts of pomegranate bark powder, 0.1-0.15 part of cocoanut fatty acid diethanolamide, 0.1-0.2 part of sodium lauryl sulfate, 0.1-0.15 part of dodecafluoroheptyl-propyl-trimethoxysilane, 3-5 parts of sodium hydroxide, 0.3-0.5 part of citric acid, 0.05-0.1 part of tea polyphenol and 100-120 parts of water. The silicon slice texture solution is high in reaction speed, moderate in corrosion, small in thickness reduction and high in repeated utilization factor, the obtained texture pyramid is uniform in size, granules are small, the repeatability is good, and the single crystalline silicon solar cell piece surface texture solution is good in technological processing quality stability, high repeatability, low in cost and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a monocrystalline silicon solar cell surface texture liquid containing pomegranate peel extract and a preparation method thereof. Background technique [0002] As the world's energy crisis becomes more serious, solar energy has become the most potential alternative energy source, and a solar cell is an electronic component that directly converts solar energy into electrical energy. The main problem hindering the development of solar cell technology is its high manufacturing cost. At present, in order to reduce the cost of monocrystalline silicon solar cells and improve the photoelectric conversion efficiency, silicon surface texturing is the easiest and most efficient method. Texture, also known as velvet, uses the principle of light trapping to make the incident light reflect multiple times to prolong its propagation path on the surface of the battery, thereby improving the...

AI Technical Summary

Problems solved by technology

[0003] At present, chemical etching is the most commonly used method for surface texture of single crystal silicon, and the commonly used texturing liquid is NaOH / isopropanol system, but isopropanol is expensive, volatilizes quickly, costs high and is not conducive to environmental protection

Patent 201010161287.8 discloses a monocrystalline silicon additive texturing solution, which is composed of alkaline corrosion solution, surfactant and organic acid or salt, does not contain isopropanol and is fast and efficient, but it has the problem of poor uniformity of reaction, which is easy to cause After texture, the pyramids on the silicon surface are too large and local over-corrosion, etc., the quality of the silicon wafers needs to be further improved