Journal
OPTICAL MATERIALS
Volume 50, Issue -, Pages 199-203Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2015.10.024
Keywords
Photostimulated luminescence; Upconversion; Optical material; Electron-phonon interaction; Huang-Rhys factor
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Funding
- National Science Foundation Partnerships for Research and Education in Materials NSF (PREM) [DMR-0934218]
- Recruitment Program of High-end Foreign Experts [GDW20145200225]
- Institute of Physics, Polish Academy of Sciences
- Ministry of Education and Research of Estonia [PUT430]
- National Natural Science Foundation of China [11204393]
- Natural Science Foundation Project of Chongqing [CSTC2014JCYJA50034]
- Research Training Program for Undergraduates of CQUPT [A2013-70]
- National Training Program of Innovation and Entrepreneurship for Undergraduates [201410617001]
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Several alkaline earth sulfides doped with Eu2+ and Er3+ ions have been synthesized and shown to be potential phosphors for applications in the visible spectral range. The excitation and emission spectra corresponding to the 4f-5d interconfigurational transitions of Eu2+ were analyzed with an aim of extraction of the main parameters of the electron-vibrational interaction. The values of the Huang-Rhys factor, effective phonon energies, and zero-phonon line positions were systematically compared for all studied materials; physical trends were discussed. As a test for the validity of the obtained parameters, the Eu2+ 5d-4f emission bands were modeled to yield good agreement with the experimental spectra. (C) 2015 Elsevier B.V. All rights reserved.
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