Issue 19, 2022

Massive amplification of photoluminescence and exceptional water stability of MAPbBr3 nanocrystals through core–shell nanostructure formation in a self-defence mechanism

Abstract

Vulnerability to atmospheric conditions and their associated toxicity limit the practical/industrial use of perovskites despite their tremendous promise in optoelectronics. This study utilized an ionic liquid-like solvent to synthesize methylammonium lead bromide (MAPbBr3) nanocrystals (NCs). The synthesized NCs showed a moderate photoluminescence quantum yield (PLQY) of ∼19% and high environmental stability of at least six months. Further, the entire visible range was tuned through the anion-exchange method. More interestingly, the synthesized NCs formed a core–shell structure in a unique self-defence mechanism in the presence of water, which was proposed to be MAPbBr3@lead laurate. This core–shell structure was found to be beneficial for (a) preventing further degradation of the NC, and making it water stable (at least for two months), (b) improving the PLQY by surface modification inducing a massive five-fold amplification, and (c) restricting the anion-exchange reaction. Moreover, these unique properties were achieved without any special control. Moreover, the successful synthesis of other MAPbX3 (X = Cl, I) demonstrated its potential applicability.

Graphical abstract: Massive amplification of photoluminescence and exceptional water stability of MAPbBr3 nanocrystals through core–shell nanostructure formation in a self-defence mechanism

Supplementary files

Article information

Article type
Paper
Submitted
14 Jun 2022
Accepted
16 Jul 2022
First published
26 Jul 2022
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2022,3, 7360-7369

Massive amplification of photoluminescence and exceptional water stability of MAPbBr3 nanocrystals through core–shell nanostructure formation in a self-defence mechanism

S. Chatterjee, T. Khan, A. Sen, N. Das and P. Sen, Mater. Adv., 2022, 3, 7360 DOI: 10.1039/D2MA00684G

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