INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Luminescence Properties and Temperature Characteristics of Er3+/Yb3+ Co-doped Ca0.5Gd(WO4)2 Phosphor |
YU Xiaochen*, LI Huajian, GAO Boyang, JIANG Yinlin, LI Xiaojie, ZHENG Rongfang, WU Han, SONG Zeyu, FAN Jibin, ZHAO Peng
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School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China |
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Abstract Up-conversion luminescent materials have been applied in non-contact optical temperature sensing technology due to their unique thermal sensitivity characteristics. Ca0.5Gd(WO4)2, with good thermal stability and optical properties, is suitable for the preparation of temperature-sensitive sensors. In this work, the Er3+/Yb3+ co-doped Ca0.5Gd(WO4)2 phosphors were successfully prepared by high-temperature solid-phase method, and the influences of different Yb3+ doping concentrations on the phase structure, morphology and luminescence properties of the samples were studied. With the increase of Yb3+ doping concentration, the up-conversion and near-infrared luminescence intensity of Ca0.5-Gd(WO4)2∶Er3+/Yb3+ sample first increased and then decreased, and achieved a maximum value when the Yb3+ doping concentration is 10 mol%. According to the relationship between pump power and luminescence intensity, it can be concluded that the up-conversion luminescence of Er3+ is a two-photon absorption process. In addition, the up-conversion luminescence of Ca0.5Gd(WO4)2∶0.5%Er3+/10%Yb3+ was measured in the temperature range of 313—573 K, and it was found that the relative sensitivity reached the maximum value of 0.014 2 K-1 at 548 K. In conclusion, the Ca0.5Gd(WO4)2∶Er3+/Yb3+ phosphor has potential application value in the field of optoelectronic materials, especially in non-contact optical temperature sensors.
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Received: 25 September 2202
Published: 25 September 2022
Online: 2022-09-26
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Fund:China Postdoctoral Science Foundation (2016M602746), the National College Students’ Innovation and Entrepreneurship Training Program (201910710572), and the National Natural Science Foundation of China (61604016). |
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