Eliminating the “decoupling” effect of fluorescence intensity ratio thermometry for an upconversion pumped system

To eliminate the “decoupling” effect, which causes the fluorescence intensity ratios (FIR) to deviate from the pure Boltzmann distribution law, a correcting method for an upvonversion pumped system was theoretical derived and experimentally verified. Theoretical results indicated that the double exp...

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Bibliographic Details
Published in:Journal of luminescence 2017-12, Vol.192, p.184-187
Main Authors: Qin, Feng, Zhao, Hua, Lv, Moyang, Zhou, Yuan, Li, Leipeng, Wang, Zhengjia, Zheng, Yangdong, Zhang, Zhiguo, Cao, Wenwu
Format: Article
Language:English
Subjects:
Boltzmann distribution law
Fluorescence intensity ratio
Spectroscopy
Thermal population
Thermometry
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Summary:To eliminate the “decoupling” effect, which causes the fluorescence intensity ratios (FIR) to deviate from the pure Boltzmann distribution law, a correcting method for an upvonversion pumped system was theoretical derived and experimentally verified. Theoretical results indicated that the double exponential decay of the lower level was entirely involved in the decay of the upper level, which could be used to determine the thermal population degree (η). Taking Tm3+ ions as examples, by analyzing the temperature dependence of the fluorescent dynamic curves originating from the thermally coupled pair, the η values at different temperatures were obtained and the corresponding correcting curve is given. The corrected FIR abides by the Boltzmann law, even in the lower temperature range.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2017.06.018