Modulating the Rise and Decay Dynamics of Upconversion Luminescence through Controlling Excitations
Modulating the Rise and Decay Dynamics of Upconversion Luminescence through Controlling Excitations
复制标题
通过控制激发来调节上转换发光的上升和衰减动力学
DOI：
10.1002/anie.202212089
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发表时间：
2022-10-07
影响因子：
16.6
通讯作者：
Huang, Ling
中科院分区：
文献类型：
--
作者：
Han, Yingdong;Gao, Chao;Huang, Ling
Different from organic dye/quantum dot possessing one luminescent center, upconversion luminescence (UCL) is actually a statistic of temporal behaviors 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 simply tuning the excitation laser. Therefore, dynamic UCL with record-wide 20-fold lifetime, approximate to 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.
