Stabilisation and Performance Enhancement Strategies for Halide Perovskite Photocatalysts.

Solar energy-powered photocatalytic fuel production and chemical synthesis have been widely recognised 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 utilisation efficiencies, exceptionally-long charge-carrier diffusion length-faciliated charge transport, and readily tailorable compositional, structural and morphological properties, have emerged as a new class of photocatalysts for efficient hydrogen evolution, CO 2 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 induced instability and an unsatifactory activity due to the need for a co-active component to realise redox processes. Herein, the recently developed advanced strategies to enhance the stability and photocatalytic activity of the HPPs are comprehensively reviewed. We firstly articulate the widely applicable stability enhancement strategies, and then explore the activity improvement strategies for fuel production and chemical synthesis. 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. This article is protected by copyright. All rights reserved.