作者
Sangeun Cho, Sungwoo Kim, Jongmin Kim, Yongcheol Jo, Ilhwan Ryu, Seongsu Hong, Jae-Joon Lee, SeungNam Cha, Eun Bi Nam, Sang Uck Lee, Sam Kyu Noh, Hyungsang Kim, Jungwon Kwak, Hyunsik Im
发表日期
2020/9/7
期刊
Light: Science & Applications
卷号
9
期号
1
页码范围
156
出版商
Nature Publishing Group UK
简介
Compared with solid scintillators, liquid scintillators have limited capability in dosimetry and radiography due to their relatively low light yields. Here, we report a new generation of highly efficient and low-cost liquid scintillators constructed by surface hybridisation of colloidal metal halide perovskite CsPbA3 (A: Cl, Br, I) nanocrystals (NCs) with organic molecules (2,5-diphenyloxazole). The hybrid liquid scintillators, compared to state-of-the-art CsI and Gd2O2S, demonstrate markedly highly competitive radioluminescence quantum yields under X-ray irradiation typically employed in diagnosis and treatment. Experimental and theoretical analyses suggest that the enhanced quantum yield is associated with X-ray photon-induced charge transfer from the organic molecules to the NCs. High-resolution X-ray imaging is demonstrated using a hybrid CsPbBr3 NC-based liquid scintillator. The novel X-ray scintillation …
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S Cho, S Kim, J Kim, Y Jo, I Ryu, S Hong, JJ Lee… - Light: Science & Applications, 2020