Upconversion emission,cathodoluminescence and temperature sensing behaviors of Yb3+ ions sensitized NaY(WO4)2:Er3+ phosphors |
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| Affiliation: | 1. Department of Electronics and Radio Engineering, Institute for Wearable Convergence Electronics, Kyung Hee University, Yongin 446-701, Republic of Korea;2. Department of Microelectronic Science and Engineering, Ningbo University, 315211 Ningbo, China;1. Coherent Light and Atomic and Molecular Spectroscopy Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries, College of Physics, Jilin University, Changchun 130012, China;2. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 3888 Eastern South Lake Road, Changchun, 130033, China;3. School of Media Mathematics & Physics, Jilin Engineering Normal University, Changchun, 130012, China;1. Department of Physics, Dalian Maritime University, Dalian 116026, China;2. School of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, China |
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| Abstract: | A series of Yb3+ ions sensitized NaY(WO4)2:Er3+ phosphors were synthesized through a solid-sate reaction method. The X-ray diffraction (XRD), upconversion (UC) emission and cathodoluminescence (CL) measurments were applied to characterize the as-prepared samples. Under the excitation of 980 nm light, bright green UC emissions corresponding to (2H11/2,4S3/2)→4I15/2 transitions of Er3+ ions were observed and the UC emission intensities showed an upward trend with increasing the Yb3+ ion concentration, achieving its optimum value at 25 mol%. Furthermore, the temperature sensing behavior based on the thermally coupled levels (2H11/2,4S3/2) of Er3+ ions was analyzed by a fluorescence intensity ratio technique. It was found that the obtained samples can be operated in a wide temperature range of 133–773 K with a maximum sensitivity of approximately 0.0112 K−1 at 515 K. Ultimately, strong CL properties were observed in NaY(WO4)2:0.01Er3+/0.25Yb3+ phosphors and the CL emission intensity increased gradually with the increment of accelerating voltage and filament current. |
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| Keywords: | Phosphors Luminescence Cathodoluminescence Temperature sensors |
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