Issue 41, 2021, Issue in Progress

Growth of hopper-shaped CsPbCl3 crystals and their exciton polariton emission

Abstract

CsPbCl3 is an attractive wide-bandgap perovskite semiconductor. Herein, we have grown hopper-shaped CsPbCl3 crystals in a solution droplet dripped on a heated substrate. During the growth, we have observed the impacts of the coffee ring effect and Marangoni flow, which may result in the hopper shape. Their photoluminescence spectra feature double peaks, which are located at 413.9 nm and 422.0 nm, respectively, and the latter increases faster in intensity than the former as the excitation power increases. We believe that the higher-energy peak originates from the excitonic emission and the lower-energy one is from the polaritons' emission, where the polaritons are generated in the exciton–exciton inelastic scattering process. Based on such an explanation, the exciton binding energy of CsPbCl3 is estimated to be 76.7 meV in our experiments, consistent with the previous reports.

Graphical abstract: Growth of hopper-shaped CsPbCl3 crystals and their exciton polariton emission

Supplementary files

Article information

Article type
Paper
Submitted
22 May 2021
Accepted
20 Jul 2021
First published
26 Jul 2021
This article is Open Access
Creative Commons BY license

RSC Adv., 2021,11, 25653-25657

Growth of hopper-shaped CsPbCl3 crystals and their exciton polariton emission

S. Zhao, T. Guo, Z. Chu, Y. Li, W. Xu and G. Ran, RSC Adv., 2021, 11, 25653 DOI: 10.1039/D1RA03977F

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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