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, Zn²⁺ is successfully introduced into [TPPen]₂MnBr₄ (TPPMB, TPPen = pentyltriphenylphosphonium) and the synthesis of [TPPen]₂Mn_0.9Zn_0.1Br₄ (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 Zn²⁺-doping. This study provides a design principle by doping engineering for enhancing the LY property of metal halide X-ray scintillators.

中文翻译：

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有机溴化锰 (II) 混合闪烁体中的 Zn2+ 掺杂可增强 X 射线成像的光产额

金属卤化物闪烁体引起了 X 射线成像的极大兴趣；然而，同时实现高光产量（LY）和高灵敏度检测仍然具有挑战性。在此，成功地将Zn ²⁺引入到[TPPen] ₂ MnBr ₄ (TPPMB，TPPen = 戊基三苯基鏻)中，并设计了[TPPen] ₂ Mn _0.9 Zn _0.1 Br ₄ (TPPMZB)的合成。由于Zn原子掺杂，LY从TPPMB的43 000光子增加到TPPMZB的68 000光子MeV ^{-1 。}此外，TPPMZB的检测限为204.1 nGy s ^-1，与TPPMB的696.9 nGy s ^{-1的检测限相比有了很大的提高。}。利用聚二甲基硅氧烷与TPPMZB或TPPMB混合制备的大尺寸闪烁体薄膜实现X射线成像，Zn ²⁺掺杂后空间分辨率从4.6 lp mm -1 扩大到11.2 lp mm ^{-1 。}本研究提供了通过掺杂工程增强金属卤化物X射线闪烁体的LY性能的设计原理。