Comparative study of the luminescence of Al2O3:Ti and Al2O3 crystals under VUV synchrotron radiation excitation |
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| Affiliation: | 1. Institute of Physics, Kazimierz Wielki University in Bydgoszcz, Weyssenhoffa sq. 11, 85-090 Bydgoszcz, Poland;2. Electronic Department, Ivan Franko National University of Lviv, 107 Gen. Tarnavskyj Str., 79017 Lviv, Ukraine;3. Institute for Single Crystals of NAS Ukraine, Lenin Av. 60, 61001 Kharkiv, Ukraine;1. Helmholtz-Zentrum Dresden – Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstr. 400, 01328 Dresden, Germany;2. Dresden University of Technology, D-01062 Dresden, Germany;3. Delft University of Technology, Department of Chemical Engineering, Materials for Energy Conversion and Storage, Julianalaan 136, NL-2628BL Delft, The Netherlands;4. Lomonosov Moscow State University (MSU), Faculty of Physics, 119991 Moscow, Russia;5. University of Duisburg-Essen, Faculty of Physics and CENIDE, Lotharstr. 1, 47048 Duisburg, Germany;6. Helmholtz-Zentrum Dresden – Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany;7. Rossendorf Beamline, European Synchrotron Radiation Facility, F-38043 Grenoble, France;1. Institute of Physics, Kazimierz Wielki University in Bydgoszcz, Poland;2. Laboratory of Optoelectronic Materials, Department of Electronics, Ivan Franko National University of Lviv, Ukraine;3. Institute for Scintillation Materials, National Academy of Sciences of Ukraine, Kharkiv, Ukraine;1. Hubei Province Key Laboratory of Science in Metallurgical Process, Wuhan University of Science and Technology, Wuhan 430081, China;2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;1. Institute of Physics of Kazimierz Wielki University in Bydgoszcz, 85-090 Bydgoszcz, Poland;2. Electronics Department of Ivan Franko National University in Lviv, 79005 Lviv, Ukraine;3. Institute of Nuclear Physics, Polish Academy of Science, 31-342 Krakow, Poland;4. Institute for Scintillation Materials, National Academy of Sciences of Ukraine, 61001 Kharkiv, Ukraine;5. Institute for Single Crystals, National Academy of Sciences of Ukraine, 61178 Kharkiv, Ukraine;1. State Key Laboratory Base of Eco-chemical Engineering, Laboratory of Inorganic Synthesis and Applied Chemistry, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China;2. State Key Laboratory Base of Eco-chemical Engineering, College of Sino-German Science and Technology, Qingdao University of Science and Technology, Qingdao 266042, PR China;1. Japan Atomic Energy Agency, 2-4, shirakata, Tokai, Nakagun, Ibaraki, Japan;2. E&E Techno Service Co., Ltd, 1476-19, Tarazaki Nishihara, Hitachinaka, Ibaraki, Japan |
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| Abstract: | The comparative study of the luminescent properties of Al2O3:Ti crystal in comparison with those for undoped Al2O3 crystal counterpart is performed under synchrotron radiation excitation with an energy of 3.7–25 eV. Apart from the main emission band peaked at 725 nm related to the 2E → 2T2 radiative transitions of Ti3+ ions, the luminescence of excitons localized around Ti ions in the band peaked at 290 nm and the luminescence of F+–Ti and F–Ti centers in the bands peaked at 325 and 434 nm are also found in the emission spectra of Al2O3:Ti crystal. We show also that the luminescence of Ti3+ ions in Al2O3:Ti crystal can be effectively excited by the luminescence of excitons localized around Ti dopant as well as by the luminescence of F–Ti centers. |
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