Thin-film Solar Cells Having Combined Textures
The surface of the substrate has a micrometric pyramidal texture together with a superimposed nanometric random texture formed on the surface of the substrate of a layer of metal or of a layer of transparent conductive oxide (TCO). The corresponding laminas can be prepared by hot-embossing lithography (HEL) with a master having pyramids obtained through chemical attack (etching) of silicon (100) in alkaline medium, or with the corresponding pyramids thereof inverted. The combination of a nanometric pyramidal texture and a nanometric random texture provides novel optical light confinement throughout the entire spectral range, which is useful for increasing the efficiency/cost ratio of thin-film solar cells, both on rigid substrates (for example, glass) and on flexible substrates (for example, polymers or stainless steel).
ESCARRE PALOU JORDI [ES]; BERTOMEU BALAGUERO JOAN [ES]; ANTONY ALDRIN [ES]; ANDREU BATALLE JORDI [ES]; CARRERAS SEGUI MARIA PAZ
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