期刊
NANOTECHNOLOGY
卷 33, 期 45, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-6528/ac84e4
关键词
Nd3+ and Yb3+; fluorescence intensity ratio; the low-temperature region; the high-temperature region; the fibre optic temperature sensor
资金
- National Science Foundation of China [51362006]
- Guangxi Key Scientific Research Project [2016GXNSFCDA380026]
- China Scholarship Council foundation under the 2021 plan [CSC 201908450006]
NaYF4:Yb3+/Tm3+@NaGdF4:Nd3+/Yb3+ upconversion nanoparticles were prepared using a solvothermal method, and the effects of sensitiser Nd3+ and Yb3+ content on luminescence properties were investigated. The nanoparticles exhibited homogeneous size and good dispersion, and could produce strong upconversion fluorescence under 808 nm excitation. Additionally, the nanoparticles showed good temperature sensing properties at the thermally coupled energy levels of Tm3+.
NaYF4:Yb3+/Tm3+@NaGdF4:Nd3+/Yb3+ upconversion nanoparticles were prepared using a solvothermal method, and the effects of key factors such as the content of sensitiser Nd3+ and Yb3+ on their luminescence properties were investigated. The nanoparticles are homogeneous in size and well dispersed. Under 808 nm excitation, it can produce strong upconversion fluorescence. At the same time, the nanoparticles have good temperature sensing properties at the thermally coupled energy levels of 700 and 646 nm for Tm3+. Using its fluorescence intensity ratio, accurate temperature measurements can be performed, and it has been found that it exhibits different temperature sensing properties in low and high-temperature regions. The maximum relative sensitivity was found to be 0.88% K-1 and 1.89% K-1 for the low-temperature region of 285-345 K and the high-temperature region of 345-495 K. The nanoparticles were applied to the internal temperature measurement of lithium batteries and the actual high-temperature environment, respectively, and were found to have good temperature measurement performance.
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