Stabilization and Performance Enhancement Strategies for Halide Perovskite Photocatalysts

Abstract

Solar‐energy‐powered photocatalytic fuel production and chemical synthesis are widely recognized as viable technological solutions for a sustainable energy future. However, the requirement of high‐performance photocatalysts is a major bottleneck. Halide perovskites, a category of diversified semiconductor materials with suitable energy‐band‐enabled high‐light‐utilization efficiencies, exceptionally long charge‐carrier‐diffusion‐length‐facilitated charge transport, and readily tailorable compositional, structural, and morphological properties, have emerged as a new class of photocatalysts for efficient hydrogen evolution, CO2 reduction, and various organic synthesis reactions. Despite the noticeable progress, the development of high‐performance halide perovskite photocatalysts (HPPs) is still hindered by several key challenges: the strong ionic nature and high hydrolysis tendency induce instability and an unsatisfactory activity due to the need for a coactive component to realize redox processes. Herein, the recently developed advanced strategies to enhance the stability and photocatalytic activity of HPPs are comprehensively reviewed. The widely applicable stability enhancement strategies are first articulated, and the activity improvement strategies for fuel production and chemical synthesis are then explored. Finally, the challenges and future perspectives associated with the application of HPPs in efficient production of fuels and value‐added chemicals are presented, indicating the irreplaceable role of the HPPs in the field of photocatalysis.

Organolead Halide-Based Coordination Polymers: Intrinsic Stability and Photophysical Applications

“…19 Last, encapsulation of lead halide hybrids into a solid-state matrix (e.g., silica, 20 titania, 21 MOFs 22 ) is able to avoid the direct contact with polar and/or oxidizing molecules. However, in many cases, the surface/interface modification and/or the formation of heterostructures will influence light absorption, 23 photocarrier diffusion, 24 and surface activity of organolead halides. 25 For example, emission quenching, 26 nanocrystal aggregation, 27 and carrier confinement 28 have been observed in heterostructures.…”

Structural, electronic, optical, elastic, thermodynamic and thermal transport properties of Cs2AgInCl6 and Cs2AgSbCl6 double perovskite semiconductors using a first-principles study

“…Optoelectronics has recently seen a remarkable emergence of organic-inorganic hybrid halide perovskites (APbX 3 ), specifically CH 3 NH 3 PbI 3 , due to their exceptional properties. [1][2][3] These properties include a favorable optical band gap, high bonding of the organic cation CH 3 NH 3+ and its inherent instability. [27][28][29][30][31][32][33][34] Organic components and the harmful nature of lead (Pb 2+ ), which are both essential parts of the widely used halide-based organic-inorganic hybrid perovskites, make them chemically unstable, which is the biggest problem.…”

Halide perovskite quantum dots for photocatalytic CO2reduction

“…Finally, we discuss the challenges and opportunities of perovskite QDs for photocatalytic CO 2 reduction and further propose several prospective directions for future research. 29 Fig. 1 Schematic illustrations of halide perovskite QDs for CO 2 reduction: structure and properties, photocatalytic mechanism and obstacles, current strategies, challenges, and opportunities.…”

“…Finally, we discuss the challenges and opportunities of perovskite QDs for photocatalytic CO 2 reduction and further propose several prospective directions for future research. 29…”