Perspectives of Soft Lattice Halide Perovskite Photocatalysts, Mechanisms and Applications

Metal halide perovskites (MHPs) have shown significant promise in the realm of photocatalysis due to their distinctive optical and electrical properties. In this Perspective, we review the latest advancements in MHPs for photocatalysis, summarizing common modification methods aimed at enhancing photocatalytic efficiency and stability. We then highlight the changes in lattice and band structures exhibited by MHPs before and after photoexcitation, with a particular focus on the intricate and varied transformations observed in lead-free perovskite materials (LFPMs). By emphasizing the importance of these lattice and band changes, we demonstrate how they can be leveraged to construct effective heterostructures and rationally design and synthesize novel perovskite materials with robust photocatalytic capabilities. We hope that this perspective can offer researchers new insights into MHPs photocatalysis and advance the application of LFPMs in the field of photocatalysis.