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MOF-Confined Sub-2 nm Stable CsPbX3 Perovskite Quantum Dots

State Key Laboratory of Heavy Oil Processing, College of New Energy and Material, Beijing Key Laboratory of Biogas Upgrading Utilization, China University of Petroleum (Beijing), Beijing 102249, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Nanomaterials 2019, 9(8), 1147; https://doi.org/10.3390/nano9081147
Received: 13 July 2019 / Revised: 7 August 2019 / Accepted: 8 August 2019 / Published: 10 August 2019
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Abstract

The metal halide with a perovskite structure has attracted significant attention due to its defect-tolerant photophysics and optoelectronic features. In particular, the all-inorganic metal halide perovskite quantum dots have potential for development in future applications. Sub-2 nm CsPbX3 (X = Cl, Br, and I) perovskite quantum dots were successfully fabricated by a MOF-confined strategy with a facile and simple route. The highly uniform microporous structure of MOF effectively restricted the CsPbX3 quantum dots aggregation in a synthetic process and endowed the obtained sub-2 nm CsPbX3 quantum dots with well-dispersed and excellent stability in ambient air without a capping agent. The photoluminescence emission spectra and lifetimes were not decayed after 60 days. The CsPbX3 quantum dots maintained size distribution stability in the air without any treatment. Because of the quantum confinement effect of CsPbX3 quantum dots, the absorption and photoluminescence (PL) emission peak were blue shifted to shorter wavelengths compare with bulk materials. Furthermore, this synthetic strategy provides a novel method in fabricating ultra-small photoluminescence quantum dots. View Full-Text
Keywords: MOF; sub-2 nm; CsPbX3 quantum dots; photoluminescence; stable MOF; sub-2 nm; CsPbX3 quantum dots; photoluminescence; stable
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Li, Z.; Yu, C.; Wen, Y.; Wei, Z.; Chu, J.; Xing, X.; Zhang, X.; Hu, M.; He, M. MOF-Confined Sub-2 nm Stable CsPbX3 Perovskite Quantum Dots. Nanomaterials 2019, 9, 1147.

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