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Broad-band lead halide perovskite quantum dot single-mode lasers

Abstract

Perovskite colloidal quantum dots (CQDs) enable the solution-processed approach toward laser, simultaneously providing tunable wavelength, high quantum efficiency, large absorption cross-section, and long Auger lifetimes. However, broad-band single-mode lasers based on such CQDs have proven to be challenging. Here we report broad-band single-mode lasers from solution-processed CsPbX3 (X=Cl, Br, I) CQDs based on high-quality zinc oxide microrod hexagonal whispering-gallery microcavity. A typical single-mode laser with ultra-narrow linewidth (~ 0.21 nm, quality factor ~ 3000) at 11.7 μJ.cm-2 was obtained at 636 nm based on the conformal deposition of CsPb(BrxI1-x)3 CQDs on an individual hexagonal zinc oxide microrod cavity with radius size about ~ 776 nm. Moreover, by tuning the halogen ratio, synthesized temperature and the size of the zinc oxide microrods, broad-band tunable single-mode lasers are obtained across the entire visible spectrum from 417 nm to 723 nm. These results represent a significant step towards easy solution-processed broad-band tunable single-mode lasers.

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Supplementary files

Article information


Submitted
28 May 2020
Accepted
28 Aug 2020
First published
28 Aug 2020

J. Mater. Chem. C, 2020, Accepted Manuscript
Article type
Paper

Broad-band lead halide perovskite quantum dot single-mode lasers

C. Zhou, J. Yu, H. Dong, F. Yuan, X. Zheng, M. Jiang and L. Zhang, J. Mater. Chem. C, 2020, Accepted Manuscript , DOI: 10.1039/D0TC02551H

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