Spectroscopic properties of the Ce-doped borate glasses |
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| Affiliation: | 1. University of Zielona Góra, Institute of Physics, Division of Spectroscopy of Functional Materials, 4a Szafrana Str., 65-516 Zielona Góra, Poland;2. Vlokh Institute of Physical Optics, Sector of Spectroscopy, 23 Dragomanov Str., 79-005 Lviv, Ukraine;3. University of Gdańsk, Institute of Experimental Physics, Condensed Matter Spectroscopy Division, 57 Wita Stwosza Str., 80-952 Gdańsk, Poland;4. Ivan Franko National University of Lviv, Faculty of Physics, 8 Kyrylo and Mefodiy Str., 79-005 Lviv, Ukraine;1. Institute of Physics, University of Tartu, W. Ostwaldi Str. 1, 50411 Tartu, Estonia;2. A. Alikhanyan National Science Laboratory, 2 Br. Alikhanyan Str., 0036 Yerevan, Armenia;3. College of Sciences, Chongqing University of Posts and Telecommunications, 400065 Chongqing, PR China;4. Institute of Physics, Jan Dlugosz University, Armii Krajowej 13/15, PL-42200 Czestochowa, Poland;5. Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, Konkoly-Thege M. út 29-33, H-1121 Budapest, Hungary;6. Photon Science at DESY, Notkestrasse 85, 22607 Hamburg, Germany;1. Institute of Experimental Physics, University of Gdańsk, 57 Wita Stwosza St., 80-952 Gdańsk, Poland;2. Institute of Physical Optics, 23 Dragomanov St., 79-005 Lviv, Ukraine;3. Division of Spectroscopy of Functional Materials, Institute of Physics, University of Zielona Góra, 4a Szafrana St., 65-516 Zielona Góra, Poland;4. Zhubanov Aktobe Regional State University, 34 Moldagulova av., 030000 Aktobe, Kazakhstan;1. University of Zielona Góra, Institute of Physics, Division of Spectroscopy of Functional Materials, 4a Szafrana Str., 65-516 Zielona Góra, Poland;2. Vlokh Institute of Physical Optics, Department of Optical Materials, 23 Dragomanov Str., 79-005 Lviv, Ukraine;3. Institute of Low Temperature and Structure Research of the Polish Academy of Sciences, Division of Optical Spectroscopy, Department of Spectroscopy of Laser Materials, 2 Okólna Str., 50-422 Wrocław, Poland |
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| Abstract: | The EPR, optical absorption and photoluminescence (emission and excitation) spectra as well as decay kinetics of a series of the Ce-doped glasses with Li2B4O7, LiKB4O7, CaB4O7, and LiCaBO3 compositions have been investigated and analysed. The borate glasses were obtained from the corresponding polycrystalline compounds in the air atmosphere, using standard glass technology. The EPR signals of the isolated Ce3+ and pair Ce3+–Ce3+ centres, coupled by magnetic dipolar and exchange interactions were registered at liquid helium temperatures. The characteristic for glass host broad bands corresponding to the 4f → 5d transitions of the Ce3+centres have been observed in the optical absorption and photoluminescence (emission and excitation) spectra. The obtained luminescence decay curves can be satisfactory described by exponential function with lifetimes in the 19.8–26.1 ns range, which depend on the basic glass composition. The local structure of Ce3+ centres in the investigated glasses has been considered and discussed. |
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| Keywords: | Borate glasses EPR Optical absorption Luminescence spectra Decay kinetics |
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