Indium-Gallium Segregation in CuIn${}_x$Ga${}_{1-x}$Se${}_2$: An ab initio based Monte Carlo Study

Christian D. R. Ludwig, Thomas Gruhn, Claudia Felser +3

Thin-film solar cells with CuIn${}_x$Ga${}_{1-x}$Se${}_2$ (CIGS) absorber are still far below their efficiency limit, although lab cells reach already 19.9%. One important aspect is the…