Ultrasonication-assisted Synthesis of CsPbBr and CsPbBr Perovskite Nanocrystals and Their Reversible Transformation

Overview

Journal Beilstein J Nanotechnol

Specialty Biotechnology

Date 2019 Apr 2

PMID 30931208

Citations 7

Authors

Longshi Rao

Xinrui Ding

Xuewei Du

Guanwei Liang

Yong Tang

Kairui Tang

Jin Z Zhang

Affiliations

Soon will be listed here.

Abstract

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

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