期刊
MATERIALS LETTERS
卷 143, 期 -, 页码 209-211出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2014.12.123
关键词
Rare earth; Nanoparticles; Upconversion; Thermometry
资金
- National Natural Science Foundation of China [61378068]
- K.C. Wong Magna Foundation in Ningbo University
Under 980 nm excitation, strong upconversion emissions can be observed in Er3+/Yb3+-codoped Y2O3 nanoparticles at both high and low temperatures. The optical temperature sensing properties based on upconversion emission of Er3+/Yb3+-codoped Y2O3 nanoparticles were investigated. The results demonstrate that the Er3+/Yb3+-codoped Y2O3 nanoparticles can be operated in a wide temperature range of 93-613 K with a maximum sensitivity approximately 0.0044 K-1 at 427 K, indicating that high- and low-temperature thermometry can be simultaneously realized in Er3+/Yb3+-codoped Y2O3 nanoparticles. These characteristics make the Er3+/Yb3+-codoped Y2O3 nanoparticles potential candidate for optical temperature sensor using a fluorescence intensity ratio technique. (C) 2015 Elsevier B.V. All rights reserved.
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