Surface-functionalized perovskite films for stable photoelectrochemical water splitting

Organometal halide perovskite has attracted intensive research interest for its unlimited potential in solar energy conversion. In this work, a rationally designed perovskite film with surface functionalization and an ultrathin Ni proactive layer delivers a stable photocurrent of 2.08 mA cm−2 for nearly 30 min during photoelectrochemical measurements.