Issue 36, 2017

Optical properties of Mn2+ doped cesium lead halide perovskite nanocrystals via a cation–anion co-substitution exchange reaction

Abstract

The emission colors of cesium lead halide perovskite nanocrystals (NCs) can be controlled by dynamic ion exchange and Mn2+ doping. Herein we report a novel strategy for the synthesis of Cs(PbxMn1−x)(ClyBr1−y)3 NCs via a post-synthetic cation–anion cosubstitution exchange reaction to tailor their optical properties in a wide range. Colloidal CsPbBr3 and CsPb1−xMnxCl3 NCs are firstly prepared, separately, and then mixed together in hexane solution. The Pb2+ and Br ions in the CsPbBr3 NCs are simultaneously exchanged for the Mn2+ and Cl ions in the CsPb1−xMnxCl3 NCs, resulting in homogeneous Cs(PbxMn1−x)(ClyBr1−y)3, with preservation of the shape and crystal structure of the initial NCs. This in situ ion exchange method avoids the degradation of photoluminescence originating from the additional purification process of the NCs, and in situ Mn2+ substitution also greatly enhances the emission intensity and quantum yield of the as-obtained NCs, which is found to be related to the bound exciton effect.

Graphical abstract: Optical properties of Mn2+ doped cesium lead halide perovskite nanocrystals via a cation–anion co-substitution exchange reaction

Supplementary files

Article information

Article type
Paper
Submitted
08 avq 2017
Accepted
27 avq 2017
First published
29 avq 2017

J. Mater. Chem. C, 2017,5, 9281-9287

Optical properties of Mn2+ doped cesium lead halide perovskite nanocrystals via a cation–anion co-substitution exchange reaction

F. Li, Z. Xia, Y. Gong, L. Gu and Q. Liu, J. Mater. Chem. C, 2017, 5, 9281 DOI: 10.1039/C7TC03575F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements