One‐Step Preparation of Ion‐Doped Cesium Lead Halide Perovskite Nanocrystals by Ultrasonication

CsPbX3 (X = Cl, Br, I) nanocrystals (NCs) are competitive materials for a wide range of applications because of their outstanding optoelectronic properties. Ion doping has been demonstrated as one powerful method for improving the optical properties of CsPbX3 NCs. However, the conventional ion‐dopin...

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Bibliographic Details
Published in:Particle & particle systems characterization 2023-08, Vol.40 (8), p.n/a
Main Authors: Jiang, Hao, Zang, Chenxi, Dong, Yixiu, Lai, Min, Xu, Shuhong, Xu, Jingkun
Format: Article
Language:English
Subjects:
Cesium
Competitive materials
doped nanocrystals
Doping
High temperature
Inert atmospheres
Lead compounds
Metal halides
Nanocrystals
one‐step approaches
Optical properties
Optoelectronics
Perovskites
Phase stability
Photoluminescence
ultrasonication
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Summary:CsPbX3 (X = Cl, Br, I) nanocrystals (NCs) are competitive materials for a wide range of applications because of their outstanding optoelectronic properties. Ion doping has been demonstrated as one powerful method for improving the optical properties of CsPbX3 NCs. However, the conventional ion‐doping approaches are tedious, and generally performed under an inert atmosphere and high temperature. In this work, a one‐step ultrasonic‐assisted approach is demonstrated to prepare doped CsPbX3 NCs. To demonstrate the universality of the ultrasonic‐assisted ion‐doping approach, three ion‐doped perovskite NCs are prepared, which represent three common improvements effects of ion doping on perovskite NCs, namely improved stability, PL emission, and photoluminescence quantum yields (PLQYs) of perovskite NCs. Sr‐doped CsPbI3 NCs showed improved phase stability. Mn‐doped CsPbCl3 NCs showed dual‐color emissions at 406 and 580 nm. The PLQYs of the as‐prepared Ni‐doped CsPbCl3 NCs are greatly improved, from 10.1% to 71%. Such a simple and versatile ion‐doping approach may promote the practical applications of all‐inorganic perovskite NCs. Synthesis of high‐quality all‐inorganic perovskite nanocrystals by a simple and cost‐effective way is a key factor to promote its practical application. One‐step ultrasonic‐assisted approach is demonstrated as a simple and versatile strategy to prepare high‐quality ion‐doped all‐inorganic perovskite nanocrystals. Such an efficient approach may promote the practical applications of all‐inorganic perovskite nanocrystals.
ISSN:0934-0866
1521-4117
DOI:10.1002/ppsc.202300032