Journal article

Highly efficient radiative recombination in intrinsically zero-dimensional perovskite micro-crystals prepared by thermally-assisted solution-phase synthesis

Wei-Long Xu, Siobhan J Bradley, Yang Xu, Fei Zheng, Christopher R Hall, Kenneth P Ghiggino, Trevor A Smith

RSC ADVANCES | ROYAL SOC CHEMISTRY | Published : 2020

Abstract

Zero-dimensional (0D) quantum confinement can be achieved in perovskite materials by the confinement of electron and hole states to single PbX64- perovskite octahedra. In this work, 0D perovskite (Cs4PbBr6) micro-crystals were prepared by a simple thermally-assisted solution method and thoroughly characterized. The micro-crystals show a high level of crystallinity and a high photoluminescence quantum yield of 45%. The radiative recombination coefficient of the 0D perovskite micro-crystals, 1.5 × 10-8 s-1 cm3, is two orders of magnitude higher than that of typical three-dimensional perovskite and is likely a strong contributing factor to the high emission efficiency of 0D perovskite materials..

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Grants

Awarded by ARC Centre of Excellence in Exciton Science


Awarded by National Natural Science Foundation of China


Awarded by Natural Science Foundation of Jiangsu Province


Funding Acknowledgements

This work was supported by the ARC Centre of Excellence in Exciton Science (CE170100026), National Natural Science Foundation of China (No. 61804015), Natural Science Foundation of Jiangsu Province (No. BK20180181) and the Qing Lan Project of the Jiangsu Education Department.