Cathodoluminescence mapping and thermoluminescence of Pr3+ doped in a CaTiO3/CaGa2O4 composite phosphor |
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| Affiliation: | 1. Department of Physics, University of South Africa, P.O. Box 392, Pretoria ZA0003, South Africa;2. Department of Physics, Islamic University, Gaza, P.O. Box 108, Palestine;3. Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein ZA9300, South Africa;4. Lumilab, Department of Solid State Sciences, Ghent University, Krijgslaan 281, S1, B-9000 Gent, Belgium;1. Institute of Physics of NAS of Belarus, Minsk, Belarus;2. Institute of Physics of NAS of Azerbaijan, Baku, Azerbaijan;3. M.V. Lomonosov department of MSU in Baku, Baku, Azerbaijan;1. Department of Metallurgical and Materials Engineering, VNIT, Nagpur 440010, India;2. Department of Physics, R.T.M. Nagpur University, Nagpur 440033, India;1. Faculty of Chemistry, University of Wroc?aw, 14. F. Joliot-Curie Street, 50-383, Wroc?aw, Poland;2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 2 Okólna Street, 50-422, Wroc?aw, Poland;1. Optics and Optoelectronics Laboratory, Department of Physics, Ocean University of China, Qingdao 266100, PR China;2. College of Physics, Qingdao University, Qingdao 266071, PR China;3. Industrial Research Institute of Nonwovens and Technical Textiles, College of Textiles and Clothing, Qingdao University, Qingdao 266071, PR China;4. Collaborative Innovation Center for Eco-Textiles of Shandong Province, Qingdao University, Qingdao 266071, PR China;5. Physics and Electronic Engineering School, Jiangsu Second Normal University, Nanjing 210013, PR China;6. State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, PR China;1. Department of Physics, University of The Free State, P.O. Box 339, Bloemfontein ZA 9300, South Africa;2. Physics Department, Kenyatta University, P.O. Box 43844-0100, Nairobi, Kenya;3. LumiLab, Department of Solid State Sciences, Ghent University, Krijgslaan 281, S1, B-9000 Ghent, Belgium;4. Center for Nano- and Biophotonics, Ghent University, Belgium |
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| Abstract: | In order to probe the properties of the one pot prepared composite phosphor of CaTiO3 and CaGa2O4, cathodoluminescence mapping, thermoluminescence and lifetime measurements were carried out. The structural study showed both irregular and rod shaped particles, which match with CaTiO3 and CaGa2O4, respectively, according the x-ray maps. The cathodoluminescence spectrum showed emission peaks from 3P0→3H4 and 1D2→3H4 transitions, with the earlier transition completely absent in CaTiO3:Pr emission at room temperature. The diffuse reflectance spectrum showed a shifted band of the inter-valence charge transfer from 360 nm to 388 nm, which is not observable for CaTiO3:Pr3+and CaGa2O4:Pr3+. Additionally, the phosphorescence decay curve was recorded and the presence of electron trapping centers was confirmed using thermoluminescence spectroscopy. |
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| Keywords: | Cathodoluminescence Thermoluminescence |
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