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Investigation of spectroscopic properties in OH- free tellurite glasses

Abstract

The aim of this project is to investigate the influence of hydroxyl (OH) content in the excited states lifetime and emission quantum efficiency of fluorescence in Nd3+ doped TeO2-WO3 and Er3+/Yb3+ co-doped TeO2-Li2O-TiO2 glass systems. Samples will be melted in an electric furnace with atmosphere control. The structural study of the glasses will be done by the infrared, Raman, and X-ray diffraction techniques. The spectroscopic parameters will be assessed by Thermal Lens and Photoluminescence techniques, whose results will be compared with that obtained by Judd-Ofelt method. It is expected that co-doping and decreasing the hydroxyl content in the glass increases the quantum efficiency, especially of the emission at 1.5 microns. Furthermore, it is expected to elucidate the mechanisms that generate the up- and down-conversion processes in the co-doped samples. (AU)

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VEICULO: TITULO (DATA)

Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
COSTA, F. B.; YUKIMITU, K.; NUNES, L. A. O.; FIGUEIREDO, M. S.; ANDRADE, L. H. C.; LIMA, S. M.; MORAES, J. C. S.. Spectroscopic properties of Nd3+-doped tungsten tellurite glasses. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, v. 88, p. 54-59, . (13/19747-9)
LIMA, S. M.; SOUZA, A. K. R.; LANGARO, A. P.; SILVA, J. R.; COSTA, F. B.; MORAES, J. C. S.; FIGUEIREDO, M. S.; SANTOS, F. A.; BAESSO, M. L.; NUNES, L. A. O.; et al. Fluorescence quantum yield of Yb3+-doped tellurite glasses determined by thermal lens spectroscopy. Optical Materials, v. 63, n. SI, p. 19-25, . (13/19747-9)
RUFINO SOUZA, ANA KELY; LANGARO, ANA PAULA; SILVA, JUNIOR REIS; COSTA, FRANCINE BETTIO; YUKIMITU, KEIZO; SILOS MORAES, JOAO CARLOS; DE OLIVEIRA NUNES, LUIZ ANTONIO; DA CUNHA ANDRADE, LUIS HUMBERTO; LIMA, SANDRO MARCIO. On the efficient Te4+-> Yb3+ cooperative energy transfer mechanism in tellurite glasses: A potential material for luminescent solar concentrators. Journal of Alloys and Compounds, v. 781, p. 1119-1126, . (13/19747-9)
COSTA, FRANCINE BETTIO; YUKIMITU, KEIZO; DE OLIVEIRA NUNES, LUIZ ANTONIO; FIGUEIREDO, MARCIO DA SILVA; SILVA, JUNIOR REIS; DA CUNHA ANDRADE, LUIS HUMBERTO; LIMA, SANDRO MARCIO; SILOS MORAES, JOAO CARLOS. High Nd3+Yb3+ energy transfer efficiency in tungsten-tellurite glass: A promising converter for solar cells. Journal of the American Ceramic Society, v. 100, n. 5, p. 1956-1962, . (13/19747-9)
LIMA, S. M.; SOUZA, A. K. R.; LANGARO, A. P.; SILVA, J. R.; COSTA, F. B.; MORAES, J. C. S.; FIGUEIREDO, M. S.; SANTOS, F. A.; BAESSO, M. L.; NUNES, L. A. O.; et al. Fluorescence quantum yield of Yb3+-doped tellurite glasses determined by thermal lens spectroscopy. Optical Materials, v. 63, p. 7-pg., . (13/19747-9)

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