Eco‐Friendly and Highly Efficient Light‐Emission Ferroelectric Scintillators by Precise Molecular Design

Abstract

AbstractHybrid manganese halide has attracted much attention in the field of environment friendly ferroelectric and photo‐responsive multifunctional materials. Here, the highly efficient photoluminescent inorganic framework MnBr42− is utilized to conceive and synthesize a series of hybrid manganese bromide compounds [RQ]2MnBr4 by introducing precisely designed quasi‐spherical cations [RQ]+ (R = H, Me, Et, FEt, Q = quinuclidine). The accurate and effective modification of cations not only achieves the satisfactory ferroelectricity, but also enhances the photoluminescence quantum yield from 38.7% to 83.65%. Moreover, [FEtQ]2MnBr4 shows a highly efficient X‐ray scintillator performance, including a large range of linear response to X‐ray dose rate from 0.3 to 414.2 μGyair s−1, a high light yield of 34 438 photons per MeV, and a low detection limit of 258 nGyair s−1. This work provides an efficient strategy for the preparation of hybrid manganese halide ferroelectrics with highly efficient light‐emission and X‐ray detection.