Morphology control and temperature sensing properties of micro-rods NaLa(WO4)2:Yb3+,Er3+ phosphors |
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| Authors: | Qi Xiao Xinyao Dong Xiumei Yin Hong Wang Weiguang Yu Hua Zhong Mingming Xing Ying Tian Yao Fu Bin Dong Xixian Luo |
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| Affiliation: | 1. Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, Key Laboratory of Photosensitive Materials & Devices of Liaoning Province, School of Physics and Materials Engineering, Dalian Minzu University, Dalian, Liaoning, P. R. China;2. Department of Physics, Dalian Maritime University, Dalian, Liaoning, P. R. China |
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| Abstract: | Uniform spindle-like micro-rods NaLa(WO4)2:Yb3+,Er3+ phosphors are prepared by the solvothermal method in the text. Controllable morphology of NaLa(WO4)2 crystal can be obtained by adjusting the prepared temperature, PH value, complexing agent content, and solvent ratio. Uniform NaLa(WO4)2:Yb3+,Er3+ micro-rods of 1.8 μm in length and 0.5 μm in width are synthesized at a low temperature of 120°C. The prepared NaLa(WO4)2:Yb3+,Er3+ phosphors present green upconversion luminescence under 980 nm excitation, luminescence intensity reaches to maximum at the Yb3+ and Er3+ concentration of 6 and 2 mol%. The temperature performance of the NaLa(WO4)2:Yb3+,Er3+ phosphors are evaluated based on thermal coupling technology. Temperature dependence of the two green emissions ratio of Er3+ ion is obtained, and the sensitivity of the sample can be calculated, the maximum sensitivity of NaLa(WO4)2:Yb3+,Er3+ is up to 0.019 K−1 at the sample temperature of 564 K. |
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| Keywords: | controllable morphology NaLa(WO4)2:Yb3+/Er3+ micro-rods temperature sensing upconversion luminescence |
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