Abstract

AbstractLow‐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)2MnCl4 (Gua = guanidine, CH6N3+) single crystal scintillator grown by a simple solution‐processing method is reported. (Gua)2MnCl4 crystallizes into a zero‐dimensional (0D) crystal structure consisting of trimeric [Mn3Cl12]6− units. It has a high PLQY of 76% and a large Stokes shift of 125 nm. (Gua)2MnCl4 flexible scintillation screen demonstrates a decent X‐ray detection limit of 145.3 nGyair 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.

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