Concentration quenching,surface and spectral analyses of SrF2:Pr3+ prepared by different synthesis techniques |
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| Affiliation: | 1. Department of Physics, UFS, Bloemfontein ZA-9300, South Africa;2. Laser Department, National Institute for Laser, Plasma, and Radiation Physics, Bucharest-Magurele, Romania;1. Department of Physics, University of the Free State, Bloemfontein ZA9300, South Africa;2. Department of Physics and Electronics, Rhodes University, Grahamstown ZA6140, South Africa;3. School of Physics, Shri Mata Vaishno Devi University, Katra 182320, Jammu Kashmir, India;1. Ivan Franko National University of Lviv, 8 Kyryla i Mefodiya Str., 79005 Lviv, Ukraine;2. Institute for Scintillation Materials, National Academy of Sciences of Ukraine, Nauka Ave. 60, 61001 Kharkiv, Ukraine;3. Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991 Moscow, Russia;4. Saint-Petersburg State Polytechnical University, 29 Polytekhnicheskaya Str., 195251 Saint-Petersburg, Russia;1. Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, Institutskaya 3, Novosibirsk, Russia;2. A.M. Prokhorov General Physics Institute RAS, Vavilov street 38, 119991, Moscow, Russia;3. Kurnakov Institute of General and Inorganic Chemistry RAS, 31 Leninsky Pr., 119991 Moscow, Russia;4. Institute of Physics, University of Tartu, W.Ostwaldi st.1, Tartu 50411, Estonia;1. College of Physics and Energy, Fujian Normal University, Fuzhou 350007, China;2. Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, Fuzhou 350007, China |
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| Abstract: | Pr3+ doped strontium fluoride (SrF2) was prepared by hydrothermal and combustion methods. The phosphors were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and Photoluminescence (PL) spectroscopy. XRD patterns indicated that the samples were completely crystallized with a pure face-centred cubic (space group: Fm3m) structure. SEM images showed different morphologies which is an indication that the morphology of the SrF2:Pr3+ phosphor strongly depends on the synthesis procedure. Both the SrF2:Pr3+ samples exhibit blue–red emission centred at 488 nm under a 439 nm excitation wavelength (λexc) at room temperature. The emission intensity of Pr3+ was also found to be dependent on the synthesis procedure. The blue–red emission has decreased with an increase in the Pr3+ concentration. The optimum Pr3+ doping level for maximum emission intensity was 0.4 and 0.2 mol% for the hydrothermal and combustion samples, respectively. The reduction in the intensity for higher concentrations was found to be due to dipole–dipole interaction induced concentration quenching effects. |
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| Keywords: | Concentration quenching XPS PL |
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