Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/242791
Type: Artigo
Title: Study of optical absorption, visible emission and NIR-vis luminescence spectra of Tm3+/Yb3+, Ho3+/Yb3+ and Tm3+/Ho3+/Yb3+ doped tellurite glasses
Author: Seshadri, M.
Barbosa, L. C.
Cordeiro, C. M. B.
Radha, M.
Sigoli, F. A.
Ratnakaram, Y. C.
Abstract: Tm3+/Yb3+, Ho3+/Yb3+ co-doped and Tm3+/Ho3+/Yb3+ triply doped TeO2-Bi2O3-ZnO-Li2O-Nb2O5 (TBZLN) tellurite glasses were prepared by melt quenching method. Judd-Ofelt intensity parameters (Omega(lambda), lambda=2, 4 and 6), radiative transition probabilities, branching ratios and radiative lifetimes of Tm3+, Ho3+ ions in co-doped TBZLN glasses were calculated from the optical absorption spectra. Excitation, visible luminescence and decay lifetimes in visible region were also investigated. The stimulated emission and gain cross-sections for the Tm3+:F-3(4) -> H-3(6) (1700 nm) and Ho3+:I-5(7) -> I-5(8) (1956 nm) transitions in co-doped TBZLN glasses have been analyzed and compared with those of other reported glasses. Up-conversion luminescence was observed in TBZLN glasses under 980 nm laser excitation and energy transfer mechanisms have been discussed. Finally, CIE color co-ordinates were calculated and it is observed that the color co-ordinates fall in blue and green regions for Tm3+/Yb3+ and Ho3+/Yb3+ co-doped TBZLN glasses, respectively. A subsequent shift in color co-ordinates from green to greenish-yellow region has been observed with an increase in the concentration (0.1, 0.5 and 1.0 mol%) of Tm3+ ions in Tm3+/Ho3+/Yb3+ triply doped TBZLN glasses. (C) 2015 Elsevier B.V. All rights reserved.
Tm3+/Yb3+, Ho3+/Yb3+ co-doped and Tm3+/Ho3+/Yb3+ triply doped TeO2-Bi2O3-ZnO-Li2O-Nb2O5 (TBZLN) tellurite glasses were prepared by melt quenching method. Judd-Ofelt intensity parameters (Omega(lambda), lambda=2, 4 and 6), radiative transition probabilities, branching ratios and radiative lifetimes of Tm3+, Ho3+ ions in co-doped TBZLN glasses were calculated from the optical absorption spectra. Excitation, visible luminescence and decay lifetimes in visible region were also investigated. The stimulated emission and gain cross-sections for the Tm3+:F-3(4) -> H-3(6) (1700 nm) and Ho3+:I-5(7) -> I-5(8) (1956 nm) transitions in co-doped TBZLN glasses have been analyzed and compared with those of other reported glasses. Up-conversion luminescence was observed in TBZLN glasses under 980 nm laser excitation and energy transfer mechanisms have been discussed. Finally, CIE color co-ordinates were calculated and it is observed that the color co-ordinates fall in blue and green regions for Tm3+/Yb3+ and Ho3+/Yb3+ co-doped TBZLN glasses, respectively. A subsequent shift in color co-ordinates from green to greenish-yellow region has been observed with an increase in the concentration (0.1, 0.5 and 1.0 mol%) of Tm3+ ions in Tm3+/Ho3+/Yb3+ triply doped TBZLN glasses.
Subject: Íons das terras raras, Vidros teluritos, Luminescência
Country: Holanda
Editor: Elsevier
Citation: Study Of Optical Absorption, Visible Emission And Nir-vis Luminescence Spectra Of Tm3+/yb3+, Ho3+/yb3+ And Tm3+/ho3+/yb3+ Doped Tellurite Glasses. Elsevier Science Bv, v. 166, p. 8-16 OCT-2015.
Rights: fechado
Identifier DOI: 10.1016/j.jlumin.2015.04.022
Address: https://www.sciencedirect.com/science/article/pii/S0022231315002136
Date Issue: 2015
Appears in Collections:IQ - Artigos e Outros Documentos
IFGW - Artigos e Outros Documentos

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