Recent progress in metal halide perovskite-based photocatalysts: physicochemical properties, synthetic strategies, and solar-driven applications

Abstract

Metal halide perovskite (MHP) materials have garnered significant interest in the realm of energy conversion and storage amid the push for carbon-neutral energy solutions due to the tunable band gap, high light collection efficiency, high photogenerated carrier mobility, and high defect tolerance.

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

“…Commonly, a 3D perovskite has a cubic structure at high temperatures and transforms into other crystalline phases such as tetragonal phase, orthorhombic phase, monoclinic phase, and rhombohedral phase with less symmetry at lower temperatures due to octahedral tilting. 65,129,130 Optoelectronic Properties. LFHPs are endowed with tunable bandgap, long carrier lifetime, and unique optoelectronic properties.…”

“…As opposed to the hot-injection method, the solvothermal approach stands out for its facile operation and ease of control over the growth rate and morphology as well as high crystallinity and reproducibility. 65 For example, methylammonium bismuth iodide (CH 3 NH 2 ) 3 Bi 2 I 9 or MA 3 Bi 2 I 9 ) and tri(dimethylammonium) hexa-iodobismuthate ([(CH 3 ) 2 -NH 2 ] 3 [BiI 6 ] or DMA 3 BiI 6 ) can be synthesized via the solvothermal route. 171 First, methylamine iodide is added into an isopropanol (IPA) solution containing dissolved bismuth precursor, and a mixture of hydroiodic acid and N,N-dimethylformamide (DMF) are added thereafter.…”

“…According to the bond angle of B–X–B, the LFHP structure can also be categorized into optically active phases including cubic, tetragonal, and orthorhombic phases. Commonly, a 3D perovskite has a cubic structure at high temperatures and transforms into other crystalline phases such as tetragonal phase, orthorhombic phase, monoclinic phase, and rhombohedral phase with less symmetry at lower temperatures due to octahedral tilting. ,, …”

“…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.…”

Lead-free Cs2AgBiBr6 double perovskite microcrystals for effective visible-light photocatalytic thio/selenocyanation

“…Due to remarkable optoelectronic and photophysical properties, lead halide perovskite nanocrystals (NCs) have been utilized in versatile realms including solar cells, 19,20 photodetectors, 21 and light-emitting diodes. 22 Meanwhile, lead halide perovskite NCs have also shown great promise as efficient photocatalysts for organic reactions, 23 especially in C–C, 24–26 C–O, 24 or C–P bond-forming reactions, 27 taking advantage of their high extinction coefficients, excellent charge transport properties, low exciton binding energy, and tunable band gaps. Compared with transition metal complexes or organic dyes, perovskite NCs as photocatalysts exhibit several appealing superiorities, such as lower economic costs, tunable electronic structures, relatively simple synthetic preparations and mild reaction conditions, which provide the possibility for large-scale production and commercial applications.…”