摘要:
Method for producing solar cells with a two-stage doping (9, 11) comprising the method steps of heavy doping (50) of at least a part of the solar cell substrate (1), of at least temporarily protecting doped areas (8), in which heavily doped areas (9) of the two-stage doping (9, 11) should be formed, from an etching medium and etching back (54; 62, 64; 72, 74) unprotected doped areas (17) of the solar cell substrate (1) by means of the etching medium, whereby, for the purpose of protecting the doped areas, sacrificial structures (7) are applied (52) on the areas (8) to be protected, which are at least partly etched (54; 62, 64; 72, 74) during etching back (54; 62, 64; 72, 74) of the unprotected doped areas.
摘要:
A product is obtained by mixing at least one polyethylene glycol with a base, allowing the mixture to rest in ambient air and at a temperature of approximately 25 degrees Celsius to form two phases, and separating the less dense phase representing the product. The product is used as an additive to etching solutions.
摘要:
Method for producing a silicon solar cell which is smoothly etched on one side, in which a front side and a rear side of a silicon substrate are etched (10) to form a smooth texture, a dielectric coating is then formed (14, 16) on the rear side of the silicon substrate and the front side of the silicon substrate is subsequently textured (20) by means of a texture etching medium, the dielectric coating formed on the rear side of the silicon substrate being used as an etching mask against the texture etching medium.