Improved One- and Multiple-Photon Excited Photoluminescence from Cd-Doped CsPbBr Perovskite NCs

Overview

Journal Nanomaterials (Basel)

Date 2022 Jan 11

PMID 35010101

Authors

Ivan D Skurlov

Wenxu Yin

Azat O Ismagilov

Anton N Tcypkin

Haohang Hua

Haibo Wang

Xiaoyu Zhang

Aleksandr P Litvin

Weitao Zheng

Affiliations

Soon will be listed here.

Abstract

Metal halide perovskite nanocrystals (NCs) attract much attention for light-emitting applications due to their exceptional optical properties. More recently, perovskite NCs have begun to be considered a promising material for nonlinear optical applications. Numerous strategies have recently been developed to improve the properties of metal halide perovskite NCs. Among them, B-site doping is one of the most promising ways to enhance their brightness and stability. However, there is a lack of study of the influence of B-site doping on the nonlinear optical properties of inorganic perovskite NCs. Here, we demonstrate that Cd doping simultaneously improves both the linear (higher photoluminescence quantum yield, larger exciton binding energy, reduced trap states density, and faster radiative recombination) and nonlinear (higher two- and three-photon absorption cross-sections) optical properties of CsPbBr NCs. Cd doping results in a two-photon absorption cross-section, reaching 2.6 × 10 Goeppert-Mayer (GM), which is among the highest reported for CsPbBr NCs.

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