Red‐Emitting Organic–Inorganic Hybrid Manganese(II) Halides for X‐Ray Imaging
Wen Li, Zhengyang Zhou, Chao Wang, Yunyun Li, Shunsuke Kurosawa, Guohao Ren, Xiaoping Ouyang, Yuntao Wu
Abstract
Abstract Low‐dimensional organic–inorganic hybrid manganese(II) halides are emerging as a highly promising class of candidate materials for X‐ray imaging due to their excellent radioluminescence performance. Here, a red‐emitting (Gua) 2 MnCl 4 (Gua = guanidine, CH 6 N 3 + ) single crystal scintillator grown by a simple solution‐processing method is reported. (Gua) 2 MnCl 4 crystallizes into a zero‐dimensional (0D) crystal structure consisting of trimeric [Mn 3 Cl 12 ] 6− units. It has a high PLQY of 76% and a large Stokes shift of 125 nm. (Gua) 2 MnCl 4 flexible scintillation screen demonstrates a decent X‐ray detection limit of 145.3 nGy air s −1 and a superior imaging resolution of 8 lp mm −1 . These results highlight the potential of low‐dimensional red‐emitting Mn‐based hybrids for X‐ray imaging applications.