Shape and phase evolution from CsPbBr3 perovskite nanocubes to tetragonal CsPb2Br5 nanosheets with an indirect bandgap

Guopeng Li; Hui Wang; Zhifeng Zhu; Yajing Chang; Ting Zhang; Zihang Song; Yang Jiang

doi:10.1039/C6CC05877A

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Shape and phase evolution from CsPbBr₃ perovskite nanocubes to tetragonal CsPb₂Br₅ nanosheets with an indirect bandgap†

Guopeng Li,^a Hui Wang,^a Zhifeng Zhu,^a Yajing Chang,^a Ting Zhang,^a Zihang Song^a and Yang Jiang*^a

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* Corresponding authors

^a School of Materials Science and Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China
E-mail: apjiang@hfut.edu.cn
Fax: +86-551-62904358
Tel: +86-551-62904358

Abstract

Tetragonal CsPb₂Br₅ nanosheets were obtained by an oriented attachment of orthorhombic CsPbBr₃ nanocubes, involving a lateral shape evolution from octagonal to square. Meanwhile, the experimental results, together with DFT simulation results, indicated that the tetragonal CsPb₂Br₅ is an indirect bandgap semiconductor that is PL-inactive with a bandgap of 2.979 eV.

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Article information

DOI: https://doi.org/10.1039/C6CC05877A
Article type: Communication
Submitted: 17 Jul 2016
Accepted: 22 Aug 2016
First published: 22 Aug 2016

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Chem. Commun., 2016,52, 11296-11299

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Shape and phase evolution from CsPbBr₃ perovskite nanocubes to tetragonal CsPb₂Br₅ nanosheets with an indirect bandgap

G. Li, H. Wang, Z. Zhu, Y. Chang, T. Zhang, Z. Song and Y. Jiang, Chem. Commun., 2016, 52, 11296 DOI: 10.1039/C6CC05877A

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