Investigation of spectroscopy and the dual energy transfer mechanisms of Sm3+-doped telluroborate glasses

• Published in: Optical materials Vol. 55; pp. 62 - 67
• Main Authors: Van Do, Phan, Tuyen, Vu Phi, Quang, Vu Xuan, Hung, Le Xuan, Thanh, Luong Duy, Ngoc, Tran, Van Tam, Ngo, Huy, Bui The
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2016
• Subjects: Energy transfer; Hirayama model; Inokuti; Intrinsic defects; Sm3; Telluroborate glass; Sm3; Telluroborate glass; Intrinsic defects; Inokuti; Hirayama model; Energy transfer
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2016.03.023

•Quenching effect of Sm3+ relates to energy transfer by dipole-dipole interaction.•Inokuti-Hirayama model is suitable for estimating energy transfer parameter.•Sm3+ concentration influences on energy transfer probability and lifetime value.•The luminescence intensity increases with increasing of temperature.•The energy transfer between NBO-intrinsic defects and the Sm3+ ions. 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 0.10mol%) 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.