ZNXCD1-XS-CU2S HETEROJUNCTION SOLAR-CELLS .1. FABRICATION AND PERFORMANCE

Alloy films of ZnxCd1-xS have been prepared by both vacuum evaporation and spray pyrolysis. Junctions of these films with Cu2S have been formed by the solid state reaction for the evaporated alloy films and by the conventional chemiplating technique for the spray deposited alloy films. The current-voltage characteristics, diffusion length of minority carriers and spectral response of the cells have been determined. Highest conversion efficiency for the evaporated cells is 6.5% corresponding to x = 0 and for the sprayed cells is 5.6% corresponding to x = 0.1. The cell performance has been analysed and further scope of improvement indicated. © 1979.