Study of electron-vibrational interaction and concentration quenching effect of Cu+ ions in lithium based sulphate phosphors |
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| Institution: | 1. Department of Physics, R.T.M. Nagpur University, Nagpur 440033, India;2. Department of Physics, Barkatullah University, Bhopal 462026, India;1. College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China;2. Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing 210009, China;3. Institute 53 of China''s Ordnance Industry, Ji’nan, Shandong 250031, China;1. Department of Biomedical Engineering and Environmental Sciences, National Tsing-Hua University, Hsinchu, Taiwan;2. Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung, Taiwan;3. Medical Physics Research Center, Institute for Radiological Research, Chang Gung University/Chang Gung Memorial Hospital, Taoyuan, Taiwan;4. Institute of Nuclear Engineering and Science, National Tsing-Hua University, Hsinchu, Taiwan;5. Department of Medical Imaging and Radiological Technology, Yuanpei University of Medical Technology, Hsinchu, Taiwan;1. Government Institute of Science, R.T. Road, Civil Lines, Nagpur, India;2. R.T.M Nagpur University, Nagpur, India;3. C/o RP&AD, BARC, Mumbai, India;4. RP&AD, Bhabha Atomic Research Centre, Mumbai, India;1. Department of Chemistry, Maharshi Dayanand University, Rohtak, 124001, India;2. Centro de Fisica, Universidade of Minho, Braga, 4710057, Portugal;3. Departament de Física Aplicada, Universitat Politècnica de València, València, 46022, Spain |
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| Abstract: | The objective of this work is to study electron-vibrational interaction (EVI) and concentration quenching and their manifestation in experimental photoluminescence spectra of Cu+ ion in various lithium based phosphors namely, Li2SO4, LiNaSO4 and LiKSO4. The main parameters of EVI, such as the Stokes shift, Huang-Rhys factor and zero-phonon line positions, were estimated. The studied systems shows strong electron lattice coupling. The validity of results was established by modeling the shape of the emission spectra, which was found to be in good agreement with experimental photoluminescence spectra. The concentration quenching study is also carried out for these compounds. The studied systems correspond to the nearest neighbor energy transfer mechanism. |
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| Keywords: | Electron-vibrational interaction Optical materials Computer modeling and simulation Photoluminescence spectroscopy Concentration quenching |
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