Sizing Up Metal Halide Perovskite Photocatalysts: From Nano to Bulk

Abstract Photocatalysts are developed in the pursuit of enabling more efficient chemical processes. Perovskites are uniquely situated for the role of a photocatalyst given their favorable optoelectronic properties and tailorable energetic features. While perovskites can be synthesized in a wide range of sizes, from quantum‐confined nanocrystals to bulk single crystals, research to date has primarily focused on perovskite nanocrystals. In this review, recent advancements in perovskite photocatalysts throughout various size regimes are outlined and emerging developments in the field are highlighted. Future directions for perovskite photocatalytic research, including a focus on larger dimensions, with more efficient photocatalysis enabled by the improvements discussed herein are proposed.