Halide perovskite quantum dots for photocatalytic CO2 reduction

Abstract

Halide perovskite quantum dots have recently attracted increasing research interest in photocatalytic CO₂ reduction due to their high light absorption coefficient, tunable bandgap, and long charge diffusion length. However, the intrinsic high radiative recombination and instability of perovskite quantum dots limit the development of perovskite-based photocatalysis, which is under investigation by different research groups. This review is focused on the current progress and challenges of halide perovskite quantum dots for photocatalytic CO₂ reduction. The structures and properties of perovskite quantum dots as well as the mechanism and obstacles for photocatalytic CO₂ reduction are first summarized in detail. Subsequently, composition optimization, surface modification, and heterojunction construction of perovskite-based photocatalysts are introduced to enhance photogenerated carrier separation and photocatalytic CO₂ activity. Finally, we discuss the challenges and opportunities of perovskite quantum dots for photocatalytic CO₂ reduction and further propose several prospective directions for future research.