Heavy metal-free visible-to-UV photon upconversion with over 20% efficiency sensitized by a ketocoumarin derivative
Heavy metal-free visible-to-UV photon upconversion with over 20% efficiency sensitized by a ketocoumarin derivative
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重%20不含金属%20可见光到紫外%20光子%20上转换%20with%20over%2020%%20效率%20敏化%20by%20a%20酮香豆素%20衍生物
DOI：
10.1039/d1tc05526g
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发表时间：
2022
影响因子：
6.4
通讯作者：
Yanai Nobuhiro
中科院分区：
文献类型：
--
作者：
Uji Masanori;Harada Naoyuki;Kimizuka Nobuo;Saigo Masaki;Miyata Kiyoshi;Onda Ken;Yanai Nobuhiro
有效的三重态-三重态湮灭光子上转换（TTA-UC）从可见光到紫外光，而不使用重金属仍然是一个具有挑战性的任务。在这里，我们实现了创纪录的高TTA-UC效率为20.3%之间的100%的最大值，通过采用香豆素酮衍生物作为三重态敏化剂，它显示出强的可见光吸收，弱的紫外吸收，和有效的系间交叉。
Efficient triplet–triplet annihilation-based photon upconversion (TTA-UC) from visible to UV light without using heavy metals is still a challenging task. Here we achieve a record-high TTA-UC efficiency of 20.3% among 100% maximum by employing a ketocoumarin derivative as a triplet sensitizer, which shows strong visible absorption, weak UV absorption, and efficient intersystem crossing.