Highly efficient eco-friendly X-ray scintillators based on an organic manganese halide
Highly efficient eco-friendly X-ray scintillators based on an organic manganese halide
复制标题
DOI：
10.1038/s41467-020-18119-y
复制
发表时间：
2020-08-28
影响因子：
16.6
通讯作者：
Ma, Biwu
中科院分区：
文献类型：
--
作者：
Xu, Liang-Jin;Lin, Xinsong;Ma, Biwu
基于闪烁的X射线探测因其在从安全到医疗保健等广泛领域的应用而受到极大的关注。在这里，我们报道了一种基于有机金属卤化物的高效X射线闪烁体，它具有最先进的性能，它是一种有机金属卤化物，乙烯双三苯基膦(II)溴((C38H34P2)MnBr4)，它可以用一种简单的溶液生长方法在室温下制备成英寸尺寸的单晶。这种零维有机金属卤化物杂化材料的绿光发射峰值位于517 nm，光致发光量子效率接近95%。它的X射线闪烁特性具有对X射线剂量率的良好的线性响应、相当于8万光子MeV-1的高光产额和72.8nGyS(-1)的低检测下限。X射线成像测试表明，基于(C38H34P2)MnBr4粉末的闪烁体为X射线照相提供了一个很好的可视化工具，(C38H34P2)MnBr4粉末与聚二甲基硅氧烷共混可以制备出高分辨率的柔性闪烁体。
Scintillation based X-ray detection has received great attention for its application in a wide range of areas from security to healthcare. Here, we report highly efficient X-ray scintillators with state-of-the-art performance based on an organic metal halide, ethylenebis-triphenylphosphonium manganese (II) bromide ((C38H34P2)MnBr4), which can be prepared using a facile solution growth method at room temperature to form inch sized single crystals. This zero-dimensional organic metal halide hybrid exhibits green emission peaked at 517 nm with a photoluminescence quantum efficiency of similar to 95%. Its X-ray scintillation properties are characterized with an excellent linear response to X-ray dose rate, a high light yield of similar to 80,000 photon MeV-1, and a low detection limit of 72.8 nGy s(-1). X-ray imaging tests show that scintillators based on (C38H34P2)MnBr4 powders provide an excellent visualization tool for X-ray radiography, and high resolution flexible scintillators can be fabricated by blending (C38H34P2)MnBr4 powders with polydimethylsiloxane.