Zn2+ Doping in Organic Manganese(II) Bromide Hybrid Scintillators toward Enhanced Light Yield for X‐Ray Imaging

Abstract Metal halide scintillators have drawn great interest for X‐ray imaging; however, it remains challenging to simultaneously achieve a high light yield (LY) and highly sensitive detection. Herein, Zn 2+ is successfully introduced into [TPPen] 2 MnBr 4 (TPPMB, TPPen = pentyltriphenylphosphonium) and the synthesis of [TPPen] 2 Mn 0.9 Zn 0.1 Br 4 (TPPMZB) is designed. The LY increases from 43 000 for TPPMB to 68 000 photons MeV −1 for TPPMZB in virtue of the Zn atom doping. Additionally, the detection limit of TPPMZB is 204.1 nGy s −1 , showing great improvement to that of TPPMB with the value of 696.9 nGy s −1 . X‐ray imaging is realized by utilizing the large‐scale scintillator film fabricated by mixing polydimethylsiloxane with TPPMZB or TPPMB, and the spatial resolution is enlarged from 4.6 to 11.2 lp mm −1 after Zn 2+ ‐doping. This study provides a design principle by doping engineering for enhancing the LY property of metal halide X‐ray scintillators.