Zhang Pengyu, Song Jing, Wang Chao, Li Chen, Guan Haoyang, Du Yiping, Xiao Jiawen, Yan Zhengguang, Wang Li
Institute of Microstructure and Property of Advanced Materials, College of Material Science and Engineering, College of Physics and Optoelectronics Engineering, Beijing University of Technology, Beijing 100124, P. R. China.
Beijing Key Laboratory of Microstructure and Properties of Solids, Beijing University of Technology, Beijing 100124, P. R. China.
ACS Appl Mater Interfaces. 2025 Jul 9;17(27):39383-39393. doi: 10.1021/acsami.5c07102. Epub 2025 Jun 26.
Scintillators, the luminescent materials that convert high-energy radiation into photons with lower energy, act widely as the key component in X-ray imaging systems. The scintillators would typically have high light yield, low detection limit, as well as high environmental stability, which enables them to work in outdoor harsh environments. Herein, we report a novel one-dimensional hybrid copper(I) halide, ,,','-tetramethylethylenediamine copper(I) iodide ([TMEDA]CuI). The bulk single crystals are obtained by solvent evaporation. The sample shows broadband blue emission under UV excitation, attributed to the emission of self-trapped excitonic states, with a photoluminescence quantum yield of nearly 30%. The material shows excellent water stability, virtually unaffected by 120 days of immersion in water under ambient conditions, and the water stability is credited to the structure with organic cations tightly wrapped around inorganic chains through weak hydrogen bonding to insulate water molecules. Working as a scintillator, [TMEDA]CuI shows a light yield of up to 14,400 photons/MeV. A scintillation film of more than 175 cm is fabricated with [TMEDA]CuI powder blended with poly(methyl methacrylate) (PMMA), showing both excellent water stability and excellent irradiation stability, enabling X-ray imaging under underwater conditions.
闪烁体是一种将高能辐射转换为低能光子的发光材料，在X射线成像系统中广泛用作关键部件。闪烁体通常具有高光输出、低检测限以及高环境稳定性，这使其能够在户外恶劣环境中工作。在此，我们报道了一种新型的一维卤化亚铜杂化物，N,N,N',N'-四甲基乙二胺碘化亚铜（[TMEDA]CuI）。通过溶剂蒸发获得块状单晶。该样品在紫外激发下呈现宽带蓝光发射，这归因于自陷激子态的发射，光致发光量子产率接近30%。该材料具有优异的水稳定性，在环境条件下浸泡120天几乎不受影响，其水稳定性归因于有机阳离子通过弱氢键紧密包裹在无机链周围以隔离水分子的结构。作为闪烁体，[TMEDA]CuI的光输出高达14400光子/兆电子伏特。用[TMEDA]CuI粉末与聚甲基丙烯酸甲酯（PMMA）混合制备了超过175厘米的闪烁膜，该闪烁膜兼具优异的水稳定性和优异的辐照稳定性，能够在水下条件下进行X射线成像。
