摘要
由于胶体量子点的荧光间歇性问题，传统的指数荧光寿命无法完美表征量子点的复杂荧光行为．通过使用时间标记、时间分辨（TTTR）模式记录量子点荧光光子，设计了一个方法来计算光子平均探测时间（AAT）．这个方法计算出的平均探测时间与传统的荧光寿命是一致的，而且其含时轨迹及分布可以揭示量子点荧光行为的细节，特别是其荧光寿命随时间的变化.
Due to photoluminescence intermittency of single tional exponential fluorescence lifetime analysis is colloidal quantum dots （QDs）, the tradinot perfect to characterize QDs＇ fluores- cent emission behavior. In this work we used the time-tagged time-resolved （TTTR） mode to record the fluorescent photons from single QDs. We showed that this method is compatible with the traditional lifetime analysis. In addition, by constructing the trajectory over time and the distribution of average arrival time （AAT） of the fluorescent photons, inore details about the emission behavior of QDs were revealed.
作者
孙咏雷
赵晶
Yong-lei Sun;Jing Zhao(Institute of Materials Science,University of Connecticut,Storrs,Connecticut 0626P,USA;Department of Chemistry,University of Connecticut,Storrs,Connecticut 05259,USA)
基金
supported by the National Science Foundation CAREER award(CHE-1554800)
关键词
量子点
荧光寿命
时间标记时间分辨模式
平均到达时间
Quantum dots
Fluorescence lifetime
Time-tagged time-resolved mode
Aver-age arrival time
