Advances in the Stability of Halide Perovskite Nanocrystals

Abstract

Colloidal halide perovskite nanocrystals are promising candidates for next-generation optoelectronics because of their facile synthesis and their outstanding and size-tunable properties. However, these materials suffer from rapid degradation, similarly to their bulk perovskite counterparts. Here, we survey the most recent strategies to boost perovskite nanocrystals stability, with a special focus on the intrinsic chemical- and compositional-factors at synthetic and post-synthetic stage. Finally, we review the most promising approaches to address the environmental extrinsic stability of perovskite nanocrystals (PNCs). Our final goal is to outline the most promising research directions to enhance PNCs’ lifetime, bringing them a step closer to their commercialization.

The Two-Photon Absorption Cross-Section Studies of CsPbX3 (X = I, Br, Cl) Nanocrystals

“…Although we kept the synthesized NCs in the anhydrous solvent in the glovebox and the optical measurements were performed in sealed cells, some exposure of the nanoparticles to the humid ambient air during the transfer of samples and while performing some of the optical measurements could have occurred. Although perovskite materials are promising, the stability of the perovskite nanostructures is a major problem, which can limit their applications and much work has already been done concerning this issue [ 37 , 38 ].…”

Octahedral distortion driven by CsPbI3 nanocrystal reaction temperature – the effects on phase stability and beyond

“…It is well-known that the NC films are more prone to degradation than their colloidal counterparts due to the weaker protective abilities of the ligands in the solid state. 35 Nevertheless, studies on films are essential to screen the potential of these materials for real optoelectronic applications, such as photovoltaics. Therefore, we examined the stability of NC films to gain insights on the degradation of their corresponding solar cells (see section 2.4).…”

Halide Perovskite Nanocrystal Emitters

“…As of today, there are a significant number of review articles covering the synthesis, optoelectronic properties, and related applications of halide PNCs. [ 21–27 ] However, a comprehensive review with a specific focus on the luminescence properties of halide perovskite materials at the nanoscale is still missing and we want to fill this knowledge gap.…”