放射发光
闪烁体
光致发光
材料科学
量子产额
卤化物
钙钛矿(结构)
吸收(声学)
光电子学
产量(工程)
光学
荧光
物理
无机化学
化学
结晶学
探测器
冶金
复合材料
作者
Bo Yang,Lixiao Yin,Guangda Niu,Jun‐Hui Yuan,Kan‐Hao Xue,Zhifang Tan,Xiangshui Miao,Ming Niu,Xinyuan Du,Haisheng Song,Efrat Lifshitz,Jiang Tang
标识
DOI:10.1002/adma.201904711
摘要
Abstract Scintillators are widely utilized for radiation detections in many fields, such as nondestructive inspection, medical imaging, and space exploration. Lead halide perovskite scintillators have recently received extensive research attention owing to their tunable emission wavelength, low detection limit, and ease of fabrication. However, the low light yields toward X‐ray irradiation and the lead toxicity of these perovskites severely restricts their practical application. A novel lead‐free halide is presented, namely Rb 2 CuBr 3 , as a scintillator with exceptionally high light yield. Rb 2 CuBr 3 exhibits a 1D crystal structure and enjoys strong carrier confinement and near‐unity photoluminescence quantum yield (98.6%) in violet emission. The high photoluminescence quantum yield combined with negligible self‐absorption from self‐trapped exciton emission and strong X‐ray absorption capability enables a record high light yield of ≈91056 photons per MeV among perovskite and relative scintillators. Overall, Rb 2 CuBr 3 provides nontoxicity, high radioluminescence intensity, and good stability, thus laying good foundations for potential application in low‐dose radiography.
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