@article{Wang2023, 
author = {Chao Wang and Jiawen Xiao and Zhengguang Yan and Xiaowei Niu and Taifeng Lin and Yingchun Zhou and Jingyu Li and Xiaodong Han},
title = {Colloidal synthesis and phase transformation of all-inorganic bismuth halide perovskite nanoplates},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {1},
pages = {1703-1711},
keywords = {nanoplates, morphology control, bismuth-based perovskites, layered double perovskite, scintillators},
url = {https://www.sciopen.com/article/10.1007/s12274-022-4656-0},
doi = {10.1007/s12274-022-4656-0},
abstract = {Lead-free bismuth-based halide perovskites and their analogues have attracted research interest for their high stability and optoelectronic properties. However, the morphology-controlled synthesis of bismuth-based perovskite nanocrystals has been rarely demonstrated. Herein, we report the colloidal synthesis of zero-dimensional (0D) Cs3BiCl6 nanosheets (NSs), Cs3Bi2Cl9 NSs/nanoplates (NPs) and Cs4MnBi2Cl12 NPs through a hot-injection method. We demonstrate that the Cs3BiCl6 NSs, as an initial product of Cs3Bi2Cl9 and Cs4MnBi2Cl12 NPs, can transform into Cs3Bi2Cl9 NSs or Cs4MnBi2Cl12 NPs via Cl-induced metal ion insertion reactions under the templating effect of Cs3BiCl6. This growth mechanism is also applicable for the synthesis of Cs4CdBi2Cl12 nanoplates. Furthermore, the alloying of Cd2+ into Cs4MnBi2Cl12 lattice could weaken the strong coupling effect between Mn and Mn, which leads to a prolonged photoluminescence lifetime and an enhanced photoluminescence quantum yield (PLQY). As a proof of concept, the alloyed Cs4MnxCd1–xBi2Cl12 NPs are used as a scintillator, which show a lowest detection limit of 134.5 nGy/s. The X-ray imaging results display a high spatial resolution of over 20 line pairs per millimeter (lp/mm). These results provide new insights in the synthesis of anisotropic bismuth-based perovskite nanocrystals and their applications in radiation detection.}
}