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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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Article information


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

New J. Chem., 2020, Advance Article
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, Advance Article , DOI: 10.1039/C9NJ05665C

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