Enhanced photoelectrochemical and photocatalytic performance of CsPb2Br5/g-C3N4 p-n heterojunction

Inorganic lead halide perovskites have attracted wide attention in photovoltaic and photocatalytic applications due to their high photoelectric conversion efficiency. However, improving the stability and charge transfer ef-ficiency of perovskites remains a significant challenge, especially in polarity solvent-based photocatalytic ap-plications. Here, we successfully grew CsPb2Br5 particles on g-C3N4 to construct p-n heterojunctions in an aqueous solution. The prepared CsPb2Br5/g-C3N4 p-n heterojunctions exhibited enhanced photoelectrochemical and photocatalytic performance, as well as better environmental stability in polar solvents (such as water). This enhancement is considered that p-n heterojunctions can effectively promote the separation and transfer of photogenerated carriers and no ligands that hinder the charge transfer are used. The successful synthesis of ligand-free CsPb2Br5/g-C3N4 p-n heterojunction extends the application of perovskite materials in the fields of photoelectrochemistry and photocatalysis.