Synthesis and near-infrared luminescence properties of LaOCl:Nd3+/Yb3+ |
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| Institution: | 1. National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China;2. The Key Laboratory of Photonic Devices and Materials, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;1. University of Silesia, Institute of Chemistry, Szkolna 9, 40-007 Katowice, Poland;2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wrocław, Poland;1. School of Information Science and Engineering, Dalian Polytechnic University, Dalian 116034, China;2. Department of Electronic Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China;1. School of Electronics Engineering, Kyungpook National University, Republic of Korea;2. Department of Electrical and Computer Engineering, The University of Texas at Austin, United States;3. Samsung-Austin, United States;1. Department of Chemistry, National Institute of Technology, Silchar, 788010, Assam, India;2. Department of Physics, National Institute of Technology, Silchar, 788010, Assam, India |
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| Abstract: | Near-infrared emitting phosphors LaOCl:Nd3+/Yb3+ were prepared by the solid-state method, and their structures and luminescent properties were investigated by using X-ray diffraction and photoluminescence analysis, respectively. The studies shows that tetragonal LaOCl:Nd3+/Yb3+ can be synthesized by the solid-state reaction at 600 °C for 3 h. Upon 353 nm UV excitation, LaOCl:Nd3+/Yb3+ sample shows strong near-infrared emission lines in the region of 1060–1150 nm (corresponding to 4F3/2 → 4IJ′ transition of Nd3+, J′ = 9/2, 11/2, 13/2, 15/2) and 980–1050 nm (corresponding to 2F5/2 → 2F7/2 transition of Yb3+). The decreasing emission intensity of Nd3+ with increasing doping concentration of Yb3+ proved the energy transfer in LaOCl:Nd3+/Yb3+. The possible near-infrared emission and energy transfer mechanism between Nd3+ and Yb3+, as well as the energy transfer efficiency of LaOCl:Nd3+/Yb3+ were discussed. |
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| Keywords: | Near-infrared luminescence Down-conversion Energy transfer |
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