Texturization method of monocrystalline silicon chip for solar cells
A technology of solar cells and monocrystalline silicon wafers, applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problems of low efficiency, achieve high efficiency, narrow distribution, and improve the effect of texturing efficiency
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Embodiment 1
[0012] The process steps are as follows:
[0013] 1. Configure texturing additives: 0.5 g of vinylpyrrolidone-vinylimidazole copolymer (number average molecular weight is ), 1 g of polyethylene glycol-polypropylene glycol-polyethylene glycol copolymer, 0.5 g of ethylenediaminetetra Acetic acid, 2 g monoethanolamine, 0.1 g sodium benzoate, and 0.25 g sodium p-toluenesulfonate were sequentially dissolved in 100 ml deionized water.
[0014] 2. Prepare lye: dissolve 10 g of sodium hydroxide in 990 g of deionized water to obtain an aqueous solution of sodium hydroxide with a mass fraction of 1%.
[0015] 3. Prepare alkaline texturing solution: mix the texturizing additive obtained in step 1 and the lye obtained in step 2 evenly at a mass ratio of 0.5:100.
[0016] 4. Texturing process: immerse the monocrystalline silicon wafer for solar cells into the alkaline texturing solution prepared in step 3 for surface texturing, and the texturing temperature is 85 o C, the texturing time ...
Embodiment 2
[0018] The process steps are as follows:
[0019] 1. Configure texturizing additives: 1 g of vinylpyrrolidone-vinylimidazole copolymer, 2 g of polyethylene glycol-polypropylene glycol-polyethylene glycol copolymer, 0.1 g of ethylenediaminetetraacetic acid, 0.5 g of monoethanolamine , 0.05 g sodium benzoate and 0.5 g sodium p-toluenesulfonate were successively dissolved in 100 ml deionized water.
[0020] 2. Prepare lye: dissolve 15 g of potassium hydroxide in 985 g of deionized water to obtain an aqueous solution of potassium hydroxide with a mass fraction of 1.5%.
[0021] 3. Prepare alkaline texturing solution: mix the texturizing additive obtained in step 1 and the lye obtained in step 2 evenly at a mass ratio of 1:100.
[0022] 4. Texturing process: immerse the monocrystalline silicon wafer for solar cells into the alkaline texturing solution prepared in step 3 for surface texturing, and the texturing temperature is 75 o C, the texturing time is 420 s.
Embodiment 3
[0024] The process steps are as follows:
[0025] 1. Configure texturizing additives: 2 g of vinylpyrrolidone-vinylimidazole copolymer, 1 g of polyethylene glycol-polypropylene glycol-polyethylene glycol copolymer, 0.5 ethylenediaminetetraacetic acid, monoethanolamine 3, benzene Dissolve 0.1 g of sodium formate and 0.5 g of sodium p-toluenesulfonate into 100 ml of deionized water in turn.
[0026] 2. Prepare lye: dissolve 20 g of sodium hydroxide in 980 g of deionized water to obtain an aqueous solution of sodium hydroxide with a mass fraction of 2%.
[0027] 3. Prepare alkaline texturing solution: mix the texturizing additive obtained in step 1 and the lye obtained in step 2 evenly in a mass ratio of 0.1:100.
[0028] 4. Texturing process: immerse the monocrystalline silicon wafer for solar cells into the alkaline texturing solution prepared in step 3 for surface texturing, and the texturing temperature is 88 o C, the texturing time is 300 s.
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