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Issue 8, 2020
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Tunable electrochemiluminescence properties of CsPbBr3 perovskite nanocrystals using mixed-monovalent cations

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Abstract

Herein, we demonstrate a simple approach for tuning the elecrochemiluminescence (ECL) properties of CsPbBr3 perovskite nanocrystals (NCs) by using mixed-monovalent cations. By replacing some of the Cs+ with Rb+, a series of RbxCs1−xPbBr3 NCs were obtained. They exhibit a narrow ECL emission peak with a full width at half-maximum of about 26–34 nm. After continuously injecting holes to produce different charged state radicals, an annihilation ECL was observed, implying that the as-prepared RbxCs1−xPbBr3 NCs are in an electron-rich state. In the presence of 2-dibutyaminoethanol as a co-reactant, strong anodic ECL of RbxCs1−xPbBr3 NCs was obtained. From CsPbBr3 NCs to RbPbBr3 NCs, the ECL peak potential position moved from 1.25 V to 1.80 V with the ECL spectrum peak shifting from 512 to 468 nm, respectively, indicating the tunable ECL properties. The Rb0.2Cs0.8PbBr3 NCs have a higher ECL intensity than the CsPbBr3 NCs.

Graphical abstract: Tunable electrochemiluminescence properties of CsPbBr3 perovskite nanocrystals using mixed-monovalent cations

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Supplementary files

Article information


Submitted
13 Nov 2019
Accepted
19 Jan 2020
First published
20 Jan 2020

New J. Chem., 2020,44, 3323-3329
Article type
Paper

Tunable electrochemiluminescence properties of CsPbBr3 perovskite nanocrystals using mixed-monovalent cations

L. Chen, Q. Kang, Z. Li, B. Zhang, G. Zou and D. Shen, New J. Chem., 2020, 44, 3323
DOI: 10.1039/C9NJ05665C

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