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Behenyl alcohol - sodium lignin sulfonate surface texture liquid of monocrystalline silicon solar cell and preparation method thereof

A technology of sodium lignosulfonate and solar cells, which is applied in the field of solar cells, can solve problems such as poor reaction uniformity, high price of isopropanol, and large pyramids, and achieve fast reaction speed, small particles, and reduced excessive corrosion Effect

Inactive Publication Date: 2016-11-09
CHINALAND SOLAR ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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Embodiment Construction

[0014] A kind of behenyl alcohol-sodium lignosulfonate monocrystalline silicon solar cell surface texturing liquid, is prepared from the component raw material of following weight (kg):

[0015] Behenyl Alcohol 0.1, Sodium Lignosulfonate 0.1, Styrene 1.5, 5% Ammonium Persulfate Solution 1, Sodium Lauryl Sulfate 0.1, Dodecafluoroheptylpropyltrimethoxysilane 0.1, Triethanolamine 0.1, Hydrogen Sodium oxide 3, citric acid 0.3, phosphate-2-ethylhexyl 0.05, water 100.

[0016] A preparation method of behenyl alcohol-sodium lignosulfonate monocrystalline silicon solar cell surface texture liquid, comprising the following steps:

[0017] (1) Weigh raw materials by weight, first add sodium lauryl sulfate to 1 / 3 weight of water and stir evenly, then slowly add the mixture of styrene and dodecafluoroheptylpropyltrimethoxysilane and stir for 0.5h , and finally slowly add ammonium persulfate solution dropwise and stir at 70°C for 2 hours, keep warm for 3 hours and then cool to obtain a co...

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Abstract

The invention discloses a behenyl alcohol - sodium lignin sulfonate surface texture liquid of a monocrystalline silicon solar cell. The behenyl alcohol - sodium lignin sulfonate surface texture liquid is prepared from the following raw materials in parts by weight: 0.1 to 0.15 part of behenyl alcohol, 0.1 to 0.15 part of sodium lignin sulfonate, 1.5 to 2.5 parts of styrene, 1 to 2 parts of 5-10% ammonium persulfate solution, 0.1 to 0.2 part of lauryl sodium sulfate, 0.1 to 0.15 part of dodecafluoroheptyl-propyl-trimethoxysilane, 0.1 to 0.2 part of triethanolamine, 3 to 5 parts of sodium hydroxide, 0.3 to 0.5 part of citric acid, 0.05 to 0.1 part of phosphoricacidethylhexylester, and 100 to 120 parts of water. The behenyl alcohol - sodium lignin sulfonate surface texture liquid has the advantages that the reaction speed is higher, the corrosion is moderate, the thinning amount is little, the repeated utilization rate is high, the prepared suede pyramid has uniform size, the particle size is small, the reaction controllability is good, and the surface quality of a silicon chip is high.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a behenyl alcohol-sodium lignosulfonate monocrystalline silicon solar cell surface texture liquid 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 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B33/10H01L31/0236
CPCC30B33/10H01L31/02363Y02E10/50
Inventor 李尚荣王可胜程晓民孟祥法郭万东袁艺琴
Owner CHINALAND SOLAR ENERGY
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