Solvent‐Assisted Kinetic Trapping in Quaternary Perovskites

Abstract

featuring Cs 1−x Rb x PbCl 3 (CRPC), a perovskite alloy that is not readily synthesized using standard solution-processing. We synthesize CRPC from a hot precursor solution that is rapidly cooled and crystallized to obtain a kinetically trapped perovskite-phase CRPC thin film. The CRPC alloy constitutes the first report of UV emission from halide perovskite thin films.

Halide perovskite quantum dots for photocatalytic CO2reduction

“…Although an A-site cation was thought to hardly influence optoelectronic properties of perovskite materials, some recent studies have confirmed that A-site doping (such as K + , 67 Rb + , 68,69 and so on) could improve stability and facilitate carrier transport. Because X-site anions directly affect the bandgap, we will discuss the X-site dopants in bandgap adjustment.…”

Surface Restructuring of Zeolite‐Encapsulated Halide Perovskite to Activate Lattice Oxygen Oxidation for Water Electrolysis

“…Compared with perovskite oxides, metal‐halide perovskites with an ionic crystal structure feature an intrinsically soft lattice, rendering greater flexibility of electronic and crystal structures for activating the LOM. [ 41–43 ] Given the instability of halide perovskites at high humidity, the major challenge of making halide perovskites water‐stable must first be overcome to realize this opportunity. [ 44–46 ]…”

“…[11,15,40] Compared with perovskite oxides, metal-halide perovskites with an ionic crystal structure feature an intrinsically soft lattice, rendering greater flexibility of electronic and crystal structures for activating the LOM. [41][42][43] Given the instability of halide perovskites at high humidity, the major challenge of making halide perovskites water-stable must first be overcome to realize this opportunity. [44][45][46] Halide-perovskite nanocrystals (NCs) stabilized through porous templates (such as mesoporous silica and metal-organic framework) have recently gained tremendous attention for protecting perovskite NCs from ambient moisture and enabling quantum-confinement of perovskites via a facile and scalable method.…”

High‐Resolution Multicolor Patterning of Metal Halide Perovskite Nanocrystal Thin Films through Rapid‐Evaporation‐Assisted Strategy

“…Moreover, the synthesized cubic phase of CsPbCl 3 and CsPbI 3 PeNCs is spontaneously converted to thermodynamically stable monoclinic or non-perovskite phases upon external stimuli involved in the conventional patterning technique, introducing poor optical properties. [23,24] Material integrations with the desired shape, size, and dimension allow for the fabrication of high resolution and high performance devices. However, the patterning of all-inorganic halide perovskite nanocrystals (NCs), promising building blocks for optics and optoelectronics, has been a fundamental challenge owing to their unstable and reactive structures and properties.…”

“…Moreover, the synthesized cubic phase of CsPbCl 3 and CsPbI 3 PeNCs is spontaneously converted to thermodynamically stable monoclinic or non‐perovskite phases upon external stimuli involved in the conventional patterning technique, introducing poor optical properties. [ 23,24 ] Therefore, introducing a benign technique for patterning PeNCs would greatly contribute to the development of PeNC‐based industrial fields.…”