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Ultrahigh Photo-stable All-Inorganic Perovskite Nanocrystals and Their Robust Random Lasing

Abstract

Photo-instability has prevented further commercialization of all-inorganic perovskite nanocrystals (NCs) in the field of high-power optoelectronic applications. Here, an accelerated process from non-luminescent Cs4PbBr6 to be CsPbBr3 NCs with bright green emission is explored with the irradiation of 365 nm during the water-triggered structural transformation. The photoelectric field provided by the photon energy of 365 nm promotes the rapid stripping of CsBr and atomic reconstruction, contributing to the production of ultrahigh photo-stable defect-free CsPbBr3 NCs. Robust emission output of the as-obtained CsPbBr3 NCs is well preserved even recorded after 160 min, moreover, a long-term stable random lasing could be achieved excited by ~800 nm femtosecond laser for at least 8.6×107 laser shots. Our results not only elucidate the photo-induced the accelerated phase transformation process of the all-inorganic perovskites, but also open up opportunities to synthesize highly stable CsPbBr3 NCs for their practical applications in photovoltaics and optoelectronics.

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Article information


Submitted
12 Dec 2019
Accepted
15 Jan 2020
First published
15 Jan 2020

This article is Open Access

Nanoscale Adv., 2020, Accepted Manuscript
Article type
Paper

Ultrahigh Photo-stable All-Inorganic Perovskite Nanocrystals and Their Robust Random Lasing

X. Xu, L. Yang, T. Wang, Q. Min, C. Pi, F. Li, X. Yang, K. Li, D. Zhou, J. Qiu and Y. X. Yu, Nanoscale Adv., 2020, Accepted Manuscript , DOI: 10.1039/C9NA00775J

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