Efficient Hydrogen Evolution On (Cuins2)(X)(Zns)(1-X) Solid Solution-Based Photocathodes Under Simulated Sunlight

A thin film of (CuInS2)(x)(ZnS)(1-x) has been developed as a photocathode for solar water splitting for the first time. A superior photoelectrochemical performance has been achieved, mainly attributed to the formation of a solid solution by CuInS2 and ZnS, which proved to be an effective strategy to improve the onset potential and efficiency of CuInS2 photocathodes.