Efficient sensitization of Tb3+ emission by Dy3+ in CaMoO4 phosphors: Energy transfer,tunable emission and optical thermometry |
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| Affiliation: | 1. Department of Physics, University of Science and Technology of China, Hefei 230026, China;2. The Center of Physics Experiment, School of Physical Sciences, University of Science and Technology of China, Hefei, China;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. Department of Applied Physics, Indian School of Mines, Dhanbad 826004, India;2. Inter University Accelerator Center, New Delhi 1100067, India;1. School of Materials Science and Technology, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, China University of Geosciences, Beijing 100083, China;2. Laboratory of Crystal Physics, Institute of Physics, SB RAS, Krasnoyarsk 660036, Russia;3. Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia;1. King Abdullah Institute for Nanotechnology, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;2. Department of Physics, Banaras Hindu University, Varanasi 221005, India;3. Research Center, College of Science, King Saud University, P.O. Box 2455, Riyadh, Saudi Arabia;1. Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China;2. Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China;1. Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, 4800 Cao''an Road, Shanghai, 201804, China;2. Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China;3. University of Chinese Academy of Sciences, Beijing, 100049, China |
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| Abstract: | Dy3+/Tb3+ codoped CaMoO4 phosphors were synthesized by a simple sol–gel method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence spectroscopy. The energy transfer process of Dy3+→Tb3+ was confirmed by excitation and emission spectra and luminescence decay curves, and the energy transfer efficiency was also estimated. The results verified that the efficient emission of Tb3+ was sensitized by Dy3+ under the excitation of 354 nm, realizing tunable emission in CaMoO4 phosphors. Furthermore, optical thermometry was achieved by the fluorescence intensity ratio between Tb3+: 5D4→7F5 (~546 nm) and Dy3+: 4F9/2→6H13/2 (~575 nm). It is expected that the investigated CaMoO4 nanograins doped with Dy3+/Tb3+ have prospective applications in display technology and optical thermometry. |
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| Keywords: | Energy transfer process Tunable emission Optical thermometry |
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