A New Polar Lead-Free Hybrid Halide X-Ray Scintillator,Advanced Optical Materials

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A New Polar Lead-Free Hybrid Halide X-Ray Scintillator
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2024-06-25 , DOI: 10.1002/adom.202400190
Yu‐Yin Wang ₁ , Wei‐Ting Song ₂ , Xin‐Ran Yao ₁ , Xiang‐Yu Chen ₁ , Ming‐Tao Cheng ₁ , Guo‐Hao Jia ₁ , He‐Zhi Liu ₁ , Xiao‐Tong Liu ₁ , Hui‐Hui Yang ₁ , Chong‐Hai Qi ₃ , Guo‐Ming Lin _{4,

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Affiliation

X-ray imaging serves a critical role across diverse sectors, including medical diagnostics, industrial surveillance, security, and space exploration. This study delves into the unique properties of a novel polar crystal, [FMPPA]ZnBr₄ (FMPPA = protonated 3-fluoro-4-(4-methyl-1-piperazinyl)aniline), characterized by a 0D metal halide structure. This crystal features [ZnBr₄]²⁻ tetrahedra and A-site organic amine ion [FMPPA]²⁺ rings. With a high photoluminescence quantum yield (≈70%) and minimal self-absorption, [FMPPA]ZnBr₄ demonstrates exceptional scintillation performance under X-ray excitation, producing 29300 ± 600 photons MeV⁻¹ and achieving a low detection limit of 0.352 µGy_air s⁻¹, surpassing conventional 3D perovskite nanocrystals. Beyond superior performance, this scintillator meets the demand for efficient X-ray imaging light emitters. Moreover, it consistently achieves ≈12.5 lp mm⁻¹ high-resolution X-ray imaging. Additionally, [FMPPA]ZnBr₄ exhibits a nonlinear optical response, surpassing the benchmark KH₂PO₄ by 1.8 times. This investigation introduces a new structure framework, paving the way for the development of integrated optoelectronic materials with both nonlinear and linear optical properties.

中文翻译：

新型极性无铅混合卤化物 X 射线闪烁体

X 射线成像在医疗诊断、工业监控、安全和太空探索等多个领域发挥着关键作用。本研究深入探讨了一种新型极性晶体 [FMPPA]ZnBr ₄ （FMPPA = 质子化 3-氟-4-(4-甲基-1-哌嗪基)苯胺）的独特性质，其特征在于 0D 金属卤化物结构。该晶体具有 [ZnBr ₄ ] ²⁻四面体和 A 位有机胺离子 [FMPPA] ²⁺环。 [FMPPA]ZnBr ₄具有高光致发光量子产率（约 70%）和最小的自吸收，在 X 射线激发下表现出出色的闪烁性能，产生 29300 ± 600 个光子 MeV ^-1并实现 0.352 µGy_空气的低检测限s ^-1 ，超越了传统的3D钙钛矿纳米晶体。除了卓越的性能之外，该闪烁体还满足高效 X 射线成像光发射器的需求。此外，它始终能够实现约 12.5 lp mm ^-1高分辨率 X 射线成像。此外，[FMPPA]ZnBr ₄表现出非线性光学响应，超过基准KH ₂ PO ₄ 1.8倍。这项研究引入了一种新的结构框架，为开发具有非线性和线性光学特性的集成光电材料铺平了道路。

更新日期：2024-06-25

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