Layer System for Thin-Film Solar Cells

摘要

A layer system (1) for thin-film solar cells (100), comprising an absorber layer (4), which contains a chalcogenide compound semiconductor, and a buffer layer (5), which is arranged on the absorber layer (4), wherein the buffer layer (5) has a semiconductor material of the formula A xIn yS z, where A is potassium (K) and/or cesium (Cs), with 0.015≤x/ (x+y+z) ≤0.25 and 0.30≤y/ (y+z) ≤0.45.