@article{Yang2020, 
author = {Hanjun Yang and Tong Cai and Exian Liu and Katie Hills-Kimball and Jianbo Gao and Ou Chen},
title = {Synthesis and transformation of zero-dimensional Cs3BiX6 (X = Cl, Br) perovskite-analogue nanocrystals},
year = {2020},
journal = {Nano Research},
volume = {13},
number = {1},
pages = {282-291},
keywords = {perovskite nanocrystals, zero-dimensional perovskite-analogue, bismuth-based perovskite, post-synthetic reactions, anion exchange},
url = {https://www.sciopen.com/article/10.1007/s12274-019-2611-5},
doi = {10.1007/s12274-019-2611-5},
abstract = {The unique structure of zero-dimensional (0D) perovskite-analogues has attracted a great amount of research interest in recent years. To date, the current compositional library of 0D perovskites is largely limited to the lead-based Cs4PbX6 (X = Cl, Br, and I) systems. In this work, we report a new synthesis of lead-free 0D Cs3BiX6 (X = Cl, Br) perovskite-analogue nanocrystals (NCs) with a uniform cubic shape. We observe a broad photoluminescence peak centered at 390 nm for the 0D Cs3BiCl6 NCs at low temperatures. This feature originates from a self-trapped exciton mechanism. In situ thermal stability studies show that Cs3BiX6 NCs remain stable upon heating up to 200 °C without crystal structural degradation. Moreover, we demonstrate that the Cs3BiX6 NCs can transform into other bismuth-based perovskite-analogues via facile anion exchange or metal ion insertion reactions. Our study presented here offers the opportunity for further understanding of the structure-property relationship of 0D perovskite-analogue materials, leading toward their future optoelectronic applications.}
}