Photo and thermoluminescence of KMgSO4F: Ce and :Mn phosphors |
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| Authors: | Anuradha Poddar S C Gedam S J Dhoble |
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| Institution: | 1. Department of Physics, Sindhu Mahavidyalaya, Nagpur, India;2. Department of Physics, K.Z.S. Science College, Kalmeshwar, Nagpur, India;3. Department of Physics, RTM Nagpur University, Nagpur, India |
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| Abstract: | KMgSO4F:Ce and KMgSO4F:Mn phosphors were prepared by a wet chemical method and studied for their photoluminescence (PL) and thermoluminescence (TL) characteristics. PL emission of KMgSO4F:Ce peaked at around 440 nm for the excitation at 377 nm due to 5d → 4f transition, while KMgSO4F:Mn had a peak at 540 nm for an excitation at 363 nm and 247 nm due to 4T1g → 6A1g transition. The phosphors also showed good thermoluminescence characteristics when they were exposed to γ‐rays at a 5 Gy dose at the rate of 0.36 kGyh?1. KMgSO4F:Ce exhibited a single thermoluminescence (TL) peak at around 167 °C and KMgSO4F:Mn also exhibited a single TL peak at around 177 °C. Possible trapping parameters such as order of kinetics (b), the geometrical factor (μg), the frequency factor (s) and the activation energy were also evaluated by Chen's half width method. This article discusses fundamental PL and TL characteristics in inorganic fluoride material activated by Ce3+ and Mn2+ ions and prepared by a wet chemical method. Copyright © 2014 John Wiley & Sons, Ltd. |
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| Keywords: | fluoride inorganic material optical material photoluminescence thermoluminescence wet chemical synthesis |
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