Synthesis,spectroscopic and structural studies on YOF,LaOF and GdOF nanocrystals doped with Eu3+, synthesized via stearic acid method |
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| Affiliation: | 1. Adam Mickiewicz University, Faculty of Chemistry, Department of Rare Earths, Grunwaldzka 6, 60-780 Poznań, Poland;2. Adam Mickiewicz University, Faculty of Chemistry, Department of Chemical Physics, Umultowska 89b, 61-614 Poznań, Poland;1. PG – Ciência dos Materiais, Universidade Federal do Vale do São Francisco, 48902-300 Juazeiro, BA, Brazil;2. Instituto de Física, Universidade Federal Fluminense, 24210-346 Niterói, RJ, Brazil;1. Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572103, India;2. Department of Physics, Govt. First Grade College, Tumkur 572103, India;3. Department of Physics, Acharya Institute of Graduate Studies, Bangalore 560 107, India;4. Department of Physics, Channabasaveshwara Institute of Technology, VTU Affiliated, Gubbi 572 216, India;5. Department of Physics, BMS Institute of Technology and Management, VTU-Affiliated, Bangalore 560 064, India;6. Avinashilingam Institute for Home Science and Higher Education for Women University, Coimbatore 641043, India;7. Department of Mechanical Engineering, Jain University, Advisor, Jain Group of Institutions, Bangalore 560069, India;8. Department of Biomedical Instrumentation Engineering, Avinashilingam Institute for Home Science and Higher Education for Women University, Coimbatore 641043, India;1. Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572 103, India;2. Department of Physics, Government First Grade College, Tumkur 572 103, India;3. Department of Physics, Acharya Institute of Graduate Studies, Bangalore 560 107, India;4. Department of Mechanical Engineering Jain University, Advisor, Jain Group of Institutions, Bangalore 560069, India;5. Advisor, Avinashilingam Institute for Home Science and Higher Education for Women University, Coimbatore 641 043, India;6. School of Physics, Reva University, Bangalore 560064, India;7. Department of Physics, BMS Institute of Technology and Management, VTU-affiliated, Bangalore 560 064, India;8. Center for Antimatter Matter Studies, Centre for Atomic, Molecular and Surface Physics, School of Physics, University of Western Australia, Perth WA-6009, Australia |
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| Abstract: | Nanocrystalline Eu3+ doped REOF oxofluorides (where RE = Y, La, Gd) were synthesized using stearic acid as the reaction medium. Optimal conditions for the synthesis of pure and single-phased oxyfluorides were found. The obtained products were analysed using thermogravimetric analysis, X-ray analysis, transmission electron microscopy and the Rietveld method. The influence of calcination temperature on the physicochemical properties was studied. Spectroscopic properties of the tetragonal and rhombohedral oxyfluoride nanocrystals were investigated using excitation and emission spectra and luminescence lifetime measurements. Effectiveness of the Eu3+ dopant red emission intensity and energy transfer processes were examined in relation to the structure and the presence of the RE ion in oxyfluorides studied. The highest luminescence efficiency was observed for the GdOF:Eu3+ nanomaterial. Judd–Ofelt intensity parameters were calculated and analysed. |
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| Keywords: | Rare earth oxyfluorides Nanocrystals Luminescence |
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