薄膜太陽電池用の層体

摘要

The present invention relates to a layer system (1) for thin-film solar cells (100) and solar modules, comprising an absorber layer (4) that includes a chalcogenide compound semiconductor and a buffer layer (5) that is arranged on the absorber layer (4) and includes halogen-enriched InxSy with ⅔≦̸x/y≦̸1, wherein the buffer layer (5) consists of a first layer region (5.1) adjoining the absorber layer (4) with a halogen mole fraction A1 and a second layer region (5.2) adjoining the first layer region (5.1) with a halogen mole fraction A2 and the ratio A1/A2 is ≧2 and the layer thickness (d1) of the first layer region (5.1) is ≦̸50% of the layer thickness (d) of the buffer layer (5).