Generation of textured surfaces, manufacturing of tandem solar cells, and tandem solar cell

A method for manufacturing a tandem solar cell, comprising:

• performing a method for generating a textured surface of a semiconductor layer, comprising:
• anisotropic etching of a surface of a semiconductor layer with a first alkaline etching solution to generate a surface of the semiconductor layer comprising pyramid-shaped textures;
• and
• anisotropic etching of the surface comprising the pyramid-shaped textures with a second alkaline etching solution, which differs from the first alkaline etching solution and does not comprise any additive causing the generation of pyramid-shaped structures, to cause material removal of the pyramid-shaped textures, thereby reducing a height difference between peaks and neighboring valleys of the pyramid-shaped textures;
• wherein, by anisotropic etching with the second alkaline etching solution, the height difference between peaks and neighboring valleys of at least some of the pyramid-shaped textures is reduced by at least 5%, preferably by at least 10%;
• and
• generating a first solar cell structure of the tandem solar cell comprising the textured surface;
• and
• generating a second solar cell structure of the tandem solar cell on the side of the first solar cell structure on which the textured surface is arranged.