LAYER SYSTEM FOR THIN-FILM SOLAR CELLS

摘要

The invention relates to a layer system (1) for thin-film solar cells (100) and solar panels, said system comprising an absorber layer (4) containing a chalcogenide semiconductor and a buffer layer (5) which is arranged on the absorber layer (4) and contains halogen-enriched ZnxIn1-xSy where 0.01 <= x <= 0.9 and 1 <= y <= 2. The buffer layer (5) consists of a first layer region (5.1) adjoining the absorber layer (4) and containing a halogen mole fraction Ai and a second layer region (5.1) adjoining the first layer region (5.2) and containing a halogen mole fraction A2. The ratio of A1/A2 is >= 2 and the layer thickness (d1) of the first layer region (5.1) <= 50% of the layer thickness (d) of the buffer layer (5).