Issue 5, 2021

Investigation of random lasing from all-inorganic halide perovskite quantum dots prepared under ambient conditions

Abstract

Random lasing from CsPbBr3 quantum dots (QDs) prepared by the hot injection method under ambient conditions has been investigated. The lasing characteristics and performance were related to the thickness and aggregation of the QDs film on a glass substrate. The perovskite emitted linear polarized ASE from the edge of the prepared sample as pump energy above a certain threshold, owing to the gain guiding effect. In comparison to the Q-switched Nd:YAG laser, the prepared perovskite random lasers produced a speckle reduced image with a lower contrast of around 0.051. Through temperature-dependent measurements under a surface normal emission configuration, the photon energy of ASE revealed a red shift as the temperature increased and showed a larger characteristic temperature of around 230 K. This result illustrates that the perovskite prepared under ambient conditions can be a promising material for a microcavity laser in the near future.

Graphical abstract: Investigation of random lasing from all-inorganic halide perovskite quantum dots prepared under ambient conditions

Supplementary files

Article information

Article type
Paper
Submitted
22 Nov 2020
Accepted
08 Jan 2021
First published
03 Feb 2021

Nanoscale, 2021,13, 3246-3251

Investigation of random lasing from all-inorganic halide perovskite quantum dots prepared under ambient conditions

D. Zhang, L. Jian, Z. Tseng, H. Cheng and J. Lin, Nanoscale, 2021, 13, 3246 DOI: 10.1039/D0NR08326G

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