Research progress and perspectives on photocatalysts based on the lead-free double halide perovskite

Abstract

Photocatalytic technology stands as a promising solution to address the current energy and environmental challenges. Halide perovskites, particularly lead-free double halide perovskites, have garnered recognition as next-generation photocatalysts due to...

Band gap engineering and photoluminescence tuning in halide double perovskites

“…A 2 M′ + M′′ 3+ X 6 halide double perovskite (HDP) and A 2 M 4+ X 6 vacancy-ordered HDP bulk powders, thin films, micro- and nanocrystals attract a great deal of interest owing to their broad compositional tunability and valuable optoelectronic properties. 1–7 One of the main advantages of HDPs that have made them attractive for optoelectronic applications is the ability to relatively simply tune their band gap to match the desired spectral range and achieve a high absorption efficiency in the UV-visible range. While it is not uncommon for pristine materials to demonstrate unsatisfactory intrinsic properties due to indirect band gaps or parity-forbidden electronic transitions, 8–10 a wide compositional tunability of HDPs comes in handy.…”

Perovskite Paradigm Shift: A Green Revolution with Lead-Free Alternatives in Photocatalytic CO2 Reduction

“…A series of morphology and surface modifications as well as encapsulation strategies have also been developed to elevate the efficiency and stability of the LFHP-based photocatalytic systems. While several reviews have summarized the current progress of metal halide perovskites in CO 2 photoreduction or LFHPs in the broader context of photocatalysis, − to the best of our knowledge none has focused explicitly on the LFHPs for photocatalytic CO 2 reduction or delved into the challenges of photocatalytic CO 2 reduction from the perspective of LFHP fundamentals and the intricacies of the photocatalytic mechanism. Thus, this Review covers the strategies to tailor and modulate LFHPs specifically for CO 2 photoreduction.…”