Genesis, challenges and opportunities for colloidal lead halide perovskite nanocrystals

Abstract

Lead halide perovskites (LHPs) in the form of nanometre-sized colloidal crystals, or nanocrystals (NCs), have attracted the attention of diverse materials scientists due to their unique optical versatility, high photoluminescence quantum yields and facile synthesis. LHP NCs have a 'soft' and predominantly ionic lattice, and their optical and electronic properties are highly tolerant to structural defects and surface states. Therefore, they cannot be approached with the same experimental mindset and theoretical framework as conventional semiconductor NCs. In this Review, we discuss LHP NCs historical and current research pursuits, challenges in applications, and the related present and future mitigation strategies explored.

Unveiling the Photo‐ and Thermal‐Stability of Cesium Lead Halide Perovskite Nanocrystals

“…[1][2][3][4] The first-generation methylammonium lead halide (MAPbX 3 ) perovskites have been shown to degrade rapidly when exposed to ambient conditions with moderate humidity, [5] which led to the increased study of new compositions such as the all-inorganic cesium lead halide (CsPbX 3 ) perovskites. [1][2][3][4] The first-generation methylammonium lead halide (MAPbX 3 ) perovskites have been shown to degrade rapidly when exposed to ambient conditions with moderate humidity, [5] which led to the increased study of new compositions such as the all-inorganic cesium lead halide (CsPbX 3 ) perovskites.…”

Zero-Dimensional Cesium Lead Halides: History, Properties, and Challenges

“…66−68 Therefore, LHPs are often described as “defect-tolerant” materials. 43,66−69 For instance, the superior properties of MAPbI 3 arise from the absence of deep traps, and iodine vacancies (V I ) only form shallow traps. 66−68,70−74 Similarly, in its bromide counterpart, V Br are generally described as shallow defects.…”

Encapsulating Perovskite Quantum Dots in Iron‐Based Metal–Organic Frameworks (MOFs) for Efficient Photocatalytic CO2 Reduction

“…[16] Meanwhile,s ome semiconductor nanocrystals (NCs) have been pursued as photosensitizers,o wing to their large extinction coefficients and flexibly adjustable thermodynamic and optical properties with the regulation of particle sizes. [21][22][23] Most recently,L HP quantum dots (QDs) have also been actively pursued as catalysts in photocatalytic fields. [21][22][23] Most recently,L HP quantum dots (QDs) have also been actively pursued as catalysts in photocatalytic fields.…”