磷光
材料科学
发光
猝灭(荧光)
激子
解吸
纳米点
光化学
光电子学
吸附
纳米技术
化学
光学
荧光
有机化学
物理
量子力学
作者
Ya‐Chuan Liang,Hao‐Chun Shao,Kai‐Kai Liu,Qing Cao,Liying Jiang,Chongxin Shan,Le‐Man Kuang,Hui Jing
出处
期刊:Small
[Wiley]
日期:2024-05-08
被引量:2
标识
DOI:10.1002/smll.202312218
摘要
Abstract Room‐temperature phosphorescent materials, renowned for their long luminescence lifetimes, have garnered significant attention in the field of optical materials. However, the challenges posed by thermally induced quenching have significantly hindered the advancement of luminescence efficiency and stability. In this study, thermally enhanced phosphorescent carbon nanodots (CND) are developed by incorporating them into fiber matrices. Remarkably, the phosphorescence lifetime of the thermally enhanced CND exhibits a twofold enhancement, increasing from 326 to 753 ms, while the phosphorescence intensity experienced a tenfold enhancement, increasing from 25 to 245 as the temperature increased to 373 K. Rigid fiber matrices can effectively suppress the non‐radiative transition rate of triplet excitons, while high temperatures can desorb oxygen adsorbed on the surface of the CND, disrupting the interaction between the CND and oxygen. Consequently, a thermally enhanced phosphorescence is obtained. In addition, benefiting from the thermally enhanced phosphorescence property of CND, a warning indicator with an anti‐counterfeiting function for monitoring cold‐chain logistics is demonstrated based on CND.
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