Lead Halide Perovskite Photoelectrocatalysis

ABSTRACT Lead halide perovskites have emerged as an outstanding class of light harvesting materials. While much progress has been made in solar cell efficiency, the materials also proved potential for light‐driven conversion of water, CO 2 or organic waste streams into solar fuels and value‐added chemicals. This case study highlights advances made in the rational photoelectrode design to improve solar‐to‐chemical conversion efficiency, product scope, and scalability. To this end, we will explore the interplay between device architecture and performance, strategies to suppress moisture degradation pathways, as well as fundamental mechanisms to steer selectivity of CO 2 reduction products. These insights are generalizable to a wide scope of thin‐film buried‐junction photoelectrodes, highlighting the unique applicability of this technology to real‐world scenarios.