Model of luminescence and delayed luminescence correlated blinking in single CsPbBr${}_3$ nanocrystals

Abstract

Cesium lead halide nanocrystals and quantum dots are prominent materials for different types of applications because of their remarkable photophysical properties. However, they are also known to exhibit the same effects observed for non-perovskite colloidal semiconductor quantum dots such as blinking, photobleaching, delayed luminescence, etc. In this study we reveal the correlations between fast and delayed emission components for both the intensity and characteristic decay time for single CsPbBr${}_3$ nanocrystals. In order to explain the phenomena observed, we propose a novel model of single CsPbBr${}_3$ nanocrystals luminescence blinking based on the hypothesis of slow variations in the electron-phonon coupling.

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References in corpus (6)

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• Single Photon Emission from Single Perovskite Nanocrystals of Cesium Lead Bromide
• Explanation of quantum dot blinking without long-lived trap hypothesis
• Model of fluorescence intermittency of single colloidal semiconductor quantum dots using multiple recombination centers
• Contribution of electron-phonon coupling to the luminescence spectra of single colloidal quantum dots
• Models of semiconductor quantum dots blinking based on spectral diffusion