放射发光
制作
纳米晶
材料科学
光致发光
碘化物
卤化物
辐照
离子
纳米技术
闪烁
光电子学
化学
光学
无机化学
物理
病理
探测器
有机化学
核物理学
医学
替代医学
作者
Xudong Hu,Ping Yan,Peng Ran,Linpeng Lu,Jinsong Leng,Yang Yang,Xiaoming Li
标识
DOI:10.1021/acs.jpclett.2c00456
摘要
Cs3Cu2I5 nanocrystals (NCs) are considered to be promising materials due to their high photoluminescence efficiency and X-ray hardness. However, the present strategy depends on tedious fabrication with excessive chemical waste. The evasive iodide ion dissociation, inadaptable ligand system, low stability, and relatively low light yield severely impede their applications. Herein, we develop an in situ fabrication strategy for a flexible and large-area Tl-doped Cs3Cu2I5 NC-polymer composite scintillation film with a high light yield (∼48800 photons/MeV) and improved stability. Tween 80 and phosphinic acid successfully inhibit the oxidation of iodide ions, and the films can be stored for at least six months. As a result, a high spatial resolution of 16.3 lp mm-1 and a low detection limit of 305 nGyair s-1 were achieved. A radioluminescence intensity of >80% was maintained after a total irradiation dose of 604.8 Gy. These results indicate the promising application of these copper halide NCs in low-cost, flexible, and high-performance medical imaging.
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