Ultrasonication-assisted synthesis of CsPbBr3 and Cs4PbBr6 perovskite nanocrystals and their reversible transformation

Longshi Rao; Xinrui Ding; Xuewei Du; Guanwei Liang; Yong Tang; Kairui Tang; Jin Z. Zhang

doi:10.3762/bjnano.10.66

Beilstein Journal of Nanotechnology (Mar 2019)

Ultrasonication-assisted synthesis of CsPbBr3 and Cs4PbBr6 perovskite nanocrystals and their reversible transformation

Longshi Rao,
Xinrui Ding,
Xuewei Du,
Guanwei Liang,
Yong Tang,
Kairui Tang,
Jin Z. Zhang

Affiliations

Longshi Rao: Engineering Research Centre of Green Manufacturing for Energy-Saving and New-Energy Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China
Xinrui Ding: Engineering Research Centre of Green Manufacturing for Energy-Saving and New-Energy Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China
Xuewei Du: Engineering Research Centre of Green Manufacturing for Energy-Saving and New-Energy Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China
Guanwei Liang: Engineering Research Centre of Green Manufacturing for Energy-Saving and New-Energy Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China
Yong Tang: Engineering Research Centre of Green Manufacturing for Energy-Saving and New-Energy Technology, School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China
Kairui Tang: Mechanical Engineering, Pennsylvania State University, Harrisburg, PA 17057, USA
Jin Z. Zhang: Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064, USA

DOI: https://doi.org/10.3762/bjnano.10.66
Journal volume & issue: Vol. 10, no. 1
pp. 666 – 676

Abstract

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We demonstrate an ultrasonication-assisted synthesis without polar solvent of CsPbBr3 and Cs4PbBr6 perovskite nanocrystals (PNCs) and their reversible transformation. The as-prepared CsPbBr3 PNCs and Cs4PbBr6 PNCs exhibit different optical properties that depend on their morphology, size, and structure. The photoluminescence (PL) emission and quantum yield (QY) of the CsPbBr3 PNCs can be tuned by changing the ultrasound power, radiation time, and the height of the vibrating spear. The optimized CsPbBr3 PNCs show a good stability and high PL QY of up to 85%. In addition, the phase transformation between CsPbBr3 PNCs and Cs4PbBr6 PNCs can be obtained through varying the amount of oleylamine (OAm) and water. The mechanism of this transformation between the CsPbBr3 PNCs and Cs4PbBr6 PNCs and their morphology change are studied, involving ions equilibrium, anisotropic growth kinetics, and CsBr-stripping process.

Published in Beilstein Journal of Nanotechnology

ISSN: 2190-4286 (Online)
Publisher: Beilstein-Institut
Country of publisher: Germany
LCC subjects: Technology: Chemical technology; Science: Physics
Website: http://www.beilstein-journals.org/bjnano/home/home.htm

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