磷光
材料科学
系统间交叉
兴奋剂
猝灭(荧光)
复合数
光电子学
光学
光化学
纳米技术
荧光
复合材料
单重态
原子物理学
化学
激发态
物理
作者
Gang Hu,Yixuan Xie,Xiaokai Xu,Bingfu Lei,Jianle Zhuang,Xuejie Zhang,Haoran Zhang,Chaofan Hu,Wenshi Ma,Yingliang Liu
出处
期刊:Optics Express
[The Optical Society]
日期:2020-06-18
卷期号:28 (13): 19550-19550
被引量:9
摘要
C-dot-based composites with phosphorescence have been widely reported due to their attractive potential in various applications. But easy quenching of phosphorescence induced by oxygen or instability of matrices remained a tricky problem. Herein, we reported a Si-doped-CD (Si-CD)-based RTP materials with long lifetime by embedding Si-CDs in sulfate crystalline matrices. The resultant Si-CD@sulfate composites exhibited a long lifetime up to 1.07 s, and outstanding stability under various ambient conditions. The intriguing RTP phenomenon was attributed to the C = O bond and the doping of Si element due to the fact that sulfates could effectively stabilize the triplet states of Si-CDs, thus enabling the intersystem crossing (ISC). Meanwhile, we confirmed that the ISC process and phosphorescence emission could be effectively regulated based on the heavy atom effect. This research introduced a new perspective to develop materials with regulated RTP performance and high stability.
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