放射发光
纳米晶
材料科学
等离子体子
光致发光
半最大全宽
纳米颗粒
钙钛矿(结构)
银纳米粒子
纳米技术
光电子学
化学工程
闪烁体
光学
物理
工程类
探测器
作者
Gi Wan Jeon,Sangeun Cho,Sunjung Park,Do Wan Kim,Atanu Jana,Dong Hyuk Park,Jungwon Kwak,Hyunsik Im,Jae Won Jang
标识
DOI:10.1002/adom.202300221
摘要
Abstract Nanocrystals of CsPbBr 3 , a colloidal perovskite, are hybridized with silver nanoparticles (Ag NPs) and organic molecules (2,5‐diphenyloxazole, PPO) to improve X‐ray radioluminescence (RL). It is known that charge transfer from the PPO molecules to the CsPbBr 3 nanocrystals enhances the RL efficiency of the CsPbBr 3 nanocrystals. In this study, Ag NPs are introduced to further enhance the RL efficiency. The plasmonic process of the Ag NPs is activated by the PPO molecules, which contain X‐ray‐induced high‐energy charges. Subsequently, electric fields induced by the plasmonic process of the Ag NPs accelerate the charge transfer from the PPO molecules to the CsPbBr 3 nanocrystals. The plasmonic effect of the Ag NPs is demonstrated by the full‐width half maximum (FWHM): the photoluminescence FWHM of the hybridized CsPbBr 3 nanocrystals is reduced, whereas the RL FWHM remains unchanged. The Ag‐NP‐induced plasmonic effect improves the RL efficiency of the PPO‐decorated CsPbBr 3 nanocrystals by ≈10%. The obtained results demonstrate that a plasmonic process can strengthen the RL of X‐ray scintillators for X‐ray detection and imaging.
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