Recent Advances in Lead-Free Halide Perovskites for Photocatalysis

Abstract

Metal halide perovskites have attracted extensive attention in the field of photocatalysis, because of their excellent photophysical properties, including high optical absorption coefficients, tunable band structures, and long carrier diffusion lengths. The application prospect of conventional lead-based halide perovskites is restricted by their toxicity and instability issues. Therefore, it is imperative to develop environmentally friendly and stable lead-free halide perovskites (LFHPs) for photocatalysis. In recent years, the rapid development of LFHPs has provided new opportunities for their photocatalytic applications, ranging from solar-to-chemical energy conversion to photocatalytic organic reactions. In this Review, we summarize the recent progresses of LFHPs for photocatalytic applications, with an emphasis on the strategies available to improve their performance and stability. Furthermore, we present an outlook on future development directions and challenges in this emerging field.

Lead‐Free, Luminescent Perovskite Nanocrystals Obtained through Ambient Condition Synthesis

“…Considering the vast chemical space and application potential of lead-free double perovskite NCs, future studies should look into charge separation in these NCs, a necessary prerequisite, e.g., for photocatalysis. [14,15]…”

Recent Advances and Opportunities in Low‐Dimensional Layered Perovskites for Emergent Applications beyond Photovoltaics

“…Recently, halide perovskites have emerged as a good photocatalyst in water splitting, dye degradation, CO 2 reduction, and organic reactions. [23,[264][265][266][267] Owing to the large absorption coefficient, 137 Cs (662 keV). c) Schematic illustration of X-ray imaging setup.…”

“…Recently, halide perovskites have emerged as a good photocatalyst in water splitting, dye degradation, CO 2 reduction, and organic reactions. [ 23,264–267 ] Owing to the large absorption coefficient, efficient photocarrier generation, and separation, selective redox reaction pure 3D perovskites and their heterostructures with other plasmonic materials/semiconductors have demonstrated excellent photocatalytic activities. [ 268–270 ] However, poor stability in the presence of aqueous medium/polar solvents, oxygen, and prolonged irradiation are the main challenges of conventional 3D halide perovskite catalysts.…”

Recent developments in lead-free bismuth-based halide perovskite nanomaterials for heterogeneous photocatalysis under visible light

“…, solar cells, light-emitting diodes, and photodetectors) and photocatalysis. 42,43,63–71 However, a dedicated review on the comprehensive analysis of BHP-based photocatalysts is still unavailable. Accordingly, this minireview summarizes the synthesis methods and physical–chemical properties of BHPs, with a focus on the fabrication of BHP nanomaterials with various micro-morphologies, band structures and surface chemical environment.…”