Robustness to High Temperatures of Al₂O₃-Coated CsPbBr₃ Nanocrystal Thin Films with High-Photoluminescence Quantum Yield for Light Emission.

ABSTRACT: Lead-halide perovskite nanocrystals are a promising material in optical devices due to their high photoluminescence (PL) quantum yield, excellent color purity, and low stimulated emission threshold. However, one problem is the stability of the nanocrystal films under different environmental conditions and under high temperatures. The latter is particularly relevant for device fabrication if further processes that require elevated temperatures are needed after the deposition of the nanocrystal film. In this work, we study the impact of a thin oxide layer of Al₂O₃ on the light emission properties of thin nanocrystal films. We find that nanocrystals passivated with quaternary ammonium bromide ligands maintain their advantageous optical properties in alumina-coated films

SUBMITTER: Palei M 

PROVIDER: S-EPMC8009476 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature