Preparation method of crystalline silicon solar cell textured structure
A technology of solar cells and crystalline silicon, applied in the field of solar cells, can solve the problems of crystal flower comparison, short life, poor uniformity, etc., and achieve the improvement of open circuit voltage and short circuit current, stability and uniformity, and photoelectric conversion efficiency Improved effect
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[0040] Example 1:
[0041] see figure 1 As shown, a method for preparing a textured structure of a crystalline silicon solar cell includes the following steps:
[0042] (1) Put the silicon wafer into a hydrofluoric acid solution containing an oxidant and a metal salt to form a porous layer structure; the temperature is 50°C, and the time is 10-1000s;
[0043] (2) Washing with water;
[0044] Then use the first chemical etching solution for surface etching; the first chemical etching solution is a mixed solution of hydrofluoric acid, nitric acid and citric acid; the temperature is 40°C, and the time is 10min;
[0045] The concentration of hydrofluoric acid is 1mol / L, the concentration of nitric acid is 5mol / L, and the concentration of citric acid is 0.05mol / L;
[0046] (3) Washing with water;
[0047] Then, the above-mentioned silicon wafer is put into a second chemical etching solution for dipping to form a textured structure; the second chemical etching solution is alkaline...
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