Investigation of Grain Growth in Chalcopyrite CuInS2 Photoelectrodes Synthesized under Wet Chemical Conditions for Bias-Free Photoelectrochemical Water Splitting

Abstract

Photoelectrochemical Water Splitting

In article number 2400518, Eun Duck Park, Jong Hyeok Park, Oh Shim Joo, and co-workers introduce a CuInS₂ photoelectrode synthesized by a scalable wet chemical spin-coating technique. Ag doping greatly spurred the grain growth of CuInS₂, resulting in high photoelectrochemical activity. Bias-free water splitting was demonstrated in a photovoltaic–photoelectrochemical cell, showing the potential of this approach for efficient hydrogen production.