Dual-mode temperature sensitive fluorescence phenomenon based on reconstruction of multi-level system in BaCaLu2F10 micro-nanocrystals
Dual-mode temperature sensitive fluorescence phenomenon based on reconstruction of multi-level system in BaCaLu2F10 micro-nanocrystals
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基于BaCaLu2F10微纳米晶多能级系统重构的双模温敏荧光现象
DOI：
10.1016/j.jallcom.2019.153190
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发表时间：
2020-04
影响因子：
6.2
通讯作者：
Zhipeng Ci
中科院分区：
文献类型：
--
作者：
Mimi Li;Youkui Xu;Guoqiang Peng;Jintao Liu;Shusheng Li;Lili Han;Zhipeng Ci
In this work, we mainly focus on the design of dual-mode temperature (T) sensitive fluorescence phenomenon in single fluoride materials. The compound BaCaLu2F10with low phonon energy is used as the host to expectantly construct the programmable energy system based on Yb3+-Er3+-Tm3+rare earth ions, thereby achieving dual-mode fluorescence features of the thermal coupling phenomenon of Er3+between2H11/2and4S3/2energy levels, and energy transfer between4F9/2energy level of Er3+and3F2energy level of Tm3+. Whereas theT-dependent spectrum indicates that the Yb3+-Er3+-Tm3+system exhibits excellent thermal stability under the excitation of 980 nm, which is not conducive to the application inTsensors. The V5+/Mo6+have rich charge transitions between their d0electronic structure and ligand orbits could be effective choice to bridge the different energy levels. Consequently, we attempt to reconstruct the Yb3+-Er3+-Tm3+-V5+/Mo6+energy level system and successful change the fluorescence intensity ratios of 521nm/540 nm and 700nm/654 nm as theTrises. Meanwhile, the UC emission intensities of BaCaLu2F10:Yb3+, Er3+, Tm3+UCPs are sharply enhanced up to 104 and 4.14 times by doping 3mol% V5+or 3mol% Mo6+, respectively, which is beneficial to improve the sensitivity ofTsensors.
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