Modulating the Rise and Decay Dynamics of Upconversion Luminescence through Controlling Excitations
Modulating the Rise and Decay Dynamics of Upconversion Luminescence through Controlling Excitations
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DOI：
10.1002/ange.202212089
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Ling Huang
中科院分区：
文献类型：
--
作者：
Yingdong Han;Chao Gao;Tian Wei;Kun Zhang;Zhang Jiang;Junhe Zhou;Mengjiao Xu;Lisha Yin;Feng Song;Ling Huang
Different from organic dye/quantum dot possessing one luminescent center, upconversion luminescence (UCL) is actually a temporal statistic of countless individual activators. Our experimental results have shown that the rise and decay dynamics of UCL is directly associated with the relative contribution of sensitizer-to-activator energy transfer and energy migration among sensitizers, which can be physically modulated by tuning the excitation laser. Therefore, dynamic UCL with record-wide 20-fold lifetime, ~70-fold red-to-green intensity ratio, and reversibly definable emission color is easily realized by just modulating the excitation laser. Moreover, this generally applicable strategy only requires a simplest-possible UCL system whereas prevalent material engineering such as complicated composition design, sophisticated core-shell construction, or tedious chemical synthesis, is no longer needed.
