CuIn1-xGaxS2 thin film solar cells with ZnxCd1-xS as heterojunction partner

Copper indium gallium sulfide, CuIn1-xGaxS2 (CIGS2) solar cells prepared with chemical bath deposited heterojunction partner zinc-cadmium sulfide (ZnxCd1-xS) layer has exhibited better blue photon response and in turn, higher currents. This can be attributed to its higher bandgap than that of CdS. The open circuit voltages for CIGS2/ZnxCd1-xS were also higher than those of the CIGS2/CdS devices, indicating improved junction properties. A cross-over effect was indicated by J-V curves at different temperatures showing the need for further optimization.