Ultra-thin silicon substrates for nanostructured solar cells

Textured ultra-thin silicon wafers were obtained by means of chemical etching in potassium hydroxide solution. The surface morphology and roughness of ultra-thin silicon wafers were investigated depend on their thickness, doping level and texturing. Based on thinned silicon substrates the heterojunction solar cells were produced. It was determined clear dependence of photovoltaic properties on surface morphology.