Absorption and photoluminescence spectroscopy of Er3+-doped SrAl2O4 ceramic phosphors |
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| Authors: | M. Ayvacıklı A. Khatab A. Ege İ. Şabikoğlu M. Henini |
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| Affiliation: | 1. Physics Department, Faculty of Arts and Sciences , Celal Bayar University , 45140 Muradiye-Manisa , Turkey;2. School of Physics and Astronomy, Nottingham Nanotechnology and Nanoscience Center, University of Nottingham , Nottingham NG7 2RD , UK;3. National Institute of Laser Enhanced Sciences, Cairo University , Cairo , Egypt;4. School of Physics and Astronomy, Nottingham Nanotechnology and Nanoscience Center, University of Nottingham , Nottingham NG7 2RD , UK |
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| Abstract: | A spectroscopic characterization of Er3+-doped SrAl2O4 phosphor materials synthesized by a solid-state reaction method with Er concentrations varying from 0.1 to 1?mol% has been performed by studying photoluminescence (PL) in the temperature range 10 to 360?K and absorption spectra. PL signals containing five emission bands at 1492, 1529, 1541, 1558, and 1600?nm, respectively, have been observed at room temperature for Er3+ transitions in the near infrared region. The samples exhibit a main luminescence peak at 1.54?µm, which is assigned to recombination via an intra-4f Er3+ transition. Sharp bands centered at around 378, 488, 521, 651, 980, 1492, and 1538?nm in the absorption spectra can be associated with transitions from 4I15/2 level to 2H9/2, 4F7/2, 2H11/2, 4F9/2, 4I11/2, 2H11/2, and 4I13/2 levels, respectively. The sharp emission peaks and excellent luminescence properties show that SrAl2O4 is a suitable host for rare-earth-doped phosphors, which may be suitable for optical applications. |
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| Keywords: | photoluminescence solid-state reaction method phosphors SrAl2O4 rare earths optical spectroscopy optical properties |
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