All‐Inorganic Manganese‐Based CsMnCl<sub>3</sub> Nanocrystals for X‐Ray Imaging
Linquan Guan, Shuo Shi, Xiaowei Niu, Shichen Guo, Jian Zhao, Tian‐Meng Ji, Hao Dong, Fengyan Jia, Jiawen Xiao, Ling‐Dong Sun, Chun‐Hua Yan
Abstract
Abstract Lead‐based halide perovskite nanomaterials with excellent optical properties have aroused great attention in the fields of solar cells, light‐emitting diodes, lasing, X‐ray imaging, etc. However, the toxicity of lead prompts researchers to develop alternatives to cut down the usage of lead. Herein, all‐inorganic manganese‐based perovskite derivatives, CsMnCl 3 nanocrystals (NCs), with uniform size and morphology have been synthesized successfully via a modified hot‐injection method. These NCs have a direct bandgap of 4.08 eV and a broadband emission centered at 660 nm. Through introducing modicum lead (1%) into the CsMnCl 3 NCs, the photoluminescence intensity greatly improves, and the quantum yield (PLQY) increases from 0.7% to 21%. Furthermore, the CsMnCl 3 :1%Pb NCs feature high‐efficiency of X‐ray absorption and radioluminescence, which make these NCs promising candidates for X‐ray imaging.