Studies of ZnxCd1-xS films and ZnxCd1-xS/CuGaSe2heterojunction solar cells

Abstract
Thin film ZnxCd1-xS/CuGaSe2 heterojunction solar cells were prepared by laser evaporating CuGaSe2 onto sprayed ZnxCd1-xS films. The physical properties of ZnxCd1-xS films are discussed to study the influence of zinc content in the ZnxCd1-xS layer on the performance of the heterojunction. The photovoltaic properties of the cells were studied using illuminated current-voltage characteristics and spectral response measurements. The typical cell parameters obtained for a Zn0.5Cd0.5S/CuGaSe2 junction were Voc=710 mV, Jsc=11.8 mA cm-2, FF=0.50 with an efficiency of 4.9% on an active area of 1 cm2 without any antireflection coating.