Ultrastrong Absorption Meets Ultraweak Absorption: Unraveling the Energy-Dissipative Routes for Dye-Sensitized Upconversion Luminescence
Ultrastrong Absorption Meets Ultraweak Absorption: Unraveling the Energy-Dissipative Routes for Dye-Sensitized Upconversion Luminescence
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超强吸收遇上超弱吸收：揭示染料敏化上转换发光的能量耗散途径
DOI：
10.1021/acs.jpclett.8b01931
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发表时间：
2018
影响因子：
5.7
通讯作者：
Kong Xianggui
中科院分区：
文献类型：
--
作者：
Xue Bin;Wang Dan;Tu Langping;Sun Dapeng;Jing Pengtao;Chang Yulei;Zhang Youlin;Liu Xiaomin;Zuo Jing;Song Jun;Qu Junle;Meijer Evert Jan;Zhang Hong;Kong Xianggui
染料敏化是提高镧系元素掺杂上转换发光纳米粒子（UCNPs）发光性能的一个新途径。然而，仍然缺乏对染料-UCNPs相互作用的一般理解，特别是输入和输出之间的混淆的大失配。以染料敏化的NaYF4：Yb/Er@NaYF4：Nd UCNPs为模型体系，不仅揭示了染料敏化UCL的深层能量耗散过程，而且首次证实了染料敏化UCL中的能量反向转移（EBT）现象.此外，这种能量耗散的EBT限制了染料与UCNP的最佳比例。通过揭示EBT、能量转移和能量迁移过程背后的所有能量损失，本文揭示了进一步设计用于UCL甚至下转换发光的有效染料敏化纳米系统。
Dye sensitization is becoming a new dimension to highly improve the upconversion luminescence (UCL) of lanthanide-doped upconversion nanoparticles (UCNPs). However, there is still a lack of general understanding of the dye–UCNPs interactions, especially the confused large mismatch between the inputs and outputs. By taking dye-sensitized NaYF4:Yb/Er@NaYF4:Nd UCNPs as a model system, we not only revealed the in-depth energy-dissipative process for dye-sensitized UCL but also confirmed the first ever experimental observation of the energy back transfer (EBT) in the dye-sensitized UCL. Furthermore, this energy-dissipative EBT restricted the optimal ratio of dyes to UCNP. By unearthing all of the energy loss behind the EBT, energy transfer, and energy migration processes, this paper sheds light on the further design of effective dye-sensitized nanosystems for UCL or even downconversion luminescence.