Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 632, Issue -, Pages 73-77Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.01.130
Keywords
Rare earth; Ferroelectric; Upconversion; Thermometry
Categories
Funding
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2013-010037]
- National Natural Science Foundation of China [61378068]
- K.C. Wong Magna Foundation in Ningbo University
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Ho/Yb-codoped Ba0.77Ca0.23TiO3 ferroelectric ceramics were prepared by a solid-state reaction method. Under the excitation of 980 nm, all the samples exhibited strong green, red and near-infrared upconversion emissions. Upconversion emission intensities of the Ho/Yb-codoped Ba0.77Ca0.23TiO3 ferroelectric ceramics can be enhanced with moderate Yb addition. Additionally, optical temperature sensing properties based on the upconversion emissions of the Ba0.77Ca0.23Ti0.975Ho0.005Yb0.03O3 ferroelectric ceramics were also investigated. The result demonstrated that the optical temperature sensor can be operated in the temperature range of 93-300 K with a maximum sensitivity of about 0.0053 K-1 at 93 K. Compared with other rare-earth doped materials, it is much easier and cheaper to synthesize Ho/Yb-codoped Ba0.77Ca0.23TiO3 ferroelectric ceramics. (C) 2015 Elsevier B.V. All rights reserved.
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