Abstract
Aurivillius oxide Na0.5Bi2.5Ta2O9 inserted by Na0.5Er0.5TiO3 ((1 − x)NBTa-xNET, x = 0, 0.05, 0.1, 0.2, 0.3, 0.5) was synthesized by the conventional solid-state method. The ceramic samples with moderate addition of Na0.5Er0.5TiO3 showed strong green and red emissions under 980 nm radiation excitation at room temperature. In the up-conversion luminous spectra, the sample of x = 0.3 had the strongest green emission. Study on how up-conversion luminous intensity varying with excitation power indicated that the green and red up-conversion luminescence (UCL) were both two-photon absorption processes. The dependence of luminescence intensity on temperature was measured in the temperature range of 83–583 K. It was observed that the fluorescence intensity ratio R(I533.6/I546.8) changed with temperature. The maximum temperature sensitivity was found to be about 20.2 × 10−4 K−1 (425 K). It is believed that Er3+ doped in Na0.5Bi2.5Ta2O9 by the form of perovskite-structured Na0.5Er0.5TiO3 is an effective method to improve the UCL property of this ceramic, which has potential application in optical temperature sensor.
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This work was supported by the National Natural Science Foundation of China (Grant No. 51572195).
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Zheng, F., Li, J., Chai, X. et al. Temperature sensing based on up-conversion luminescence of (1 − x)Na0.5Bi2.5Ta2O9 + xNa0.5Er0.5TiO3 ceramics. J Mater Sci: Mater Electron 27, 7994–8000 (2016). https://doi.org/10.1007/s10854-016-4794-9
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DOI: https://doi.org/10.1007/s10854-016-4794-9