Recent Progress on Synthesis, Characterization, and Applications of Metal Halide Perovskites@Metal Oxide

Abstract

Metal halide perovskites (MHPs) have become a promising candidate in a myriad of applications, such as light-emitting diodes, solar cells, lasing, photodetectors, photocatalysis, transistors, etc. This is related to the synergy of their excellent features, including high photoluminescence quantum yields, narrow and tunable emission, long charge carrier lifetimes, broad absorption spectrum along with high extinction absorptions coefficients, among others. However, the main bottleneck is the poor stability of the MHPs under ambient conditions. This is imposing severe restrictions with respect to their industrialized applications and commercialization. In this context, metal oxide (MO x ) coatings have recently emerged as an efficient strategy toward overcoming the stabilities issues as well as retaining the excellent properties of the MHPs, and therefore facilitate the development of the related devices' stabilities and performances. This review provides a summary of the recent progress on synthetic methods, enhanced features, the techniques to assess the MHPs@MO x composites, and applications of the MHPs@MO x . Specially, novel approaches to fabricate the composites and new applications of the composites are also reported in this review for the first time. This is rounded by a critical outlook about the current MHPs' stability issues and the further direction to ensure a bright future of MHPs@MO x .

Synthesis of cesium lead bromide nanoparticles by the ultrasonic bath method: A polar-solvent-free approach at room temperature

“…In contrast, the CsPbBr 3 phase was dominantly present in CPB8, and this was evident from the stronger BE peak at 68.0 eV. The XPS binding energy spectra of the O 1s region of CPB8 comprise three deconvoluted peaks located at 530.7 eV, 532.1 eV, and 532.8 eV assigned to Pb–O 25 and O–H adsorption, 26,27 and O 2− and carbon via sp 2 orbitals, 28 respectively. But, the O 1s region of CPB12 also split into three peaks.…”

Colloidal CsPbX3 Nanocrystals with Thin Metal Oxide Gel Coatings

“…The obvious choice that remained for us was oxide-based coatings. Recently, many groups have focused on encapsulating LHP NCs in an oxide-based inorganic matrix − or tried to synthesize stable LHP core/inorganic shell NCs. ,− A vast majority of these publications are based on SiO 2 and related oxides, showing that they are indeed chemically inert toward the LHP and that the optical properties of coated NCs remain virtually unchanged. ,, However, most of these works focus on rather thick coatings in an attempt to create fully environmentally stable LHP compounds. On the contrary, in this work, we sought to realize colloidally and environmentally stable LHP NCs coated with a thin inorganic layer and free of bulky organic ligands.…”

Holy Water: Photo‐Brightening in Quasi‐2D Perovskite Films under Ambient Enables Highly Performing Light‐Emitting Diodes

“…[ 13 ] Unfortunately, the stability of the MHPs under ambient conditions still remains as the biggest obstacle for the commercialization. [ 14 ]…”