期刊
OPTICAL MATERIALS
卷 55, 期 -, 页码 62-67出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2016.03.023
关键词
Telluroborate glass; Sm3+; Energy transfer; Intrinsic defects; Inokuti; Hirayama model
资金
- Vietnam National Foundation for Science and Technology Development (NAFOSTED) [104.03-2014.27]
The absorption, luminescence, Raman spectra and lifetimes of Sm-doped alkali telluroborate glasses (TB glasses) TB:Sm3+ have been investigated. The dual energy transfers including energy transfer between Sm3+ - Sm3+ pairs and Sm3+ - non-bridging oxygen (NBO) intrinsic defects were investigated. The concentration quenching of luminescence intensity was explained by the non-radiative energy transfer between the Sm3+ ions through the cross-relaxation mechanism. The decay curves are single exponentials with low concentrations (lower 0.10 mol%) and become non-exponentials at higher concentrations. The non-exponential decay curves are fitted to the Inokuti and Hirayama model to give the energy transfer parameters between Sm3+ ions. The dominant interaction mechanism for energy transfer process is dipole-dipole interaction. The energy transfer induced Sm3+ photoluminescence enhancement in tellurite glass was experimentally studied and confirmed. (C) 2016 Elsevier B.V. All rights reserved.
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