Preparation method of textured structure of crystalline silicon solar cell
A technology of solar cells and crystalline silicon, applied in the field of solar cells, can solve problems such as crystal flower comparison, poor uniformity, and color difference in texture, achieve open circuit voltage and short circuit current improvement, ensure stability and uniformity, and ensure stability The effect of sex and uniformity
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Embodiment 1
[0089] see figure 1 Shown, a kind of preparation method of textured structure of crystalline silicon solar cell comprises the steps:
[0090](1) Put the silicon wafer into a hydrofluoric acid solution containing an oxidizing agent and a metal salt to form a porous layer structure; the temperature is 50°C, and the time is 10-1000s;
[0091] (2) washing with water; then cleaning with alkaline chemical liquid;
[0092] The alkaline chemical liquid is selected from sodium hydroxide solution; the cleaning time is 5-250s;
[0093] The volume concentration of the alkaline chemical liquid is 10%, and the temperature is 20-80°C;
[0094] (3) washing with water; then using the first cleaning solution to remove residual metal particles;
[0095] The first cleaning liquid is selected from any mixed liquid in the mixed liquid of nitric acid, ammonia water, hydrochloric acid and hydrogen peroxide, and the mixed liquid of ammonia water and hydrogen peroxide;
[0096] (4) washing with wat...
Embodiment 2
[0103] A method for preparing a textured structure of a crystalline silicon solar cell, comprising the steps of:
[0104] (1) Put the silicon wafer into a hydrofluoric acid solution containing an oxidizing agent and a metal salt to form a porous layer structure; the temperature is 50°C, and the time is 10-1000s;
[0105] (2) Washing with water; then wash with alkaline chemical solution to remove residual metal particles at the bottom of the hole; the washing time is 5-250s;
[0106] The volume concentration of alkaline substances in the alkaline chemical liquid is 10%, and the temperature is 20-80°C;
[0107] The alkaline chemical liquid is a mixed liquid of ammonia water and hydrogen peroxide;
[0108] (3) washing with water; then using the first cleaning solution to remove residual metal particles;
[0109] The first cleaning liquid is selected from any mixed liquid in the mixed liquid of nitric acid, ammonia water, hydrochloric acid and hydrogen peroxide, and the mixed li...
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