Optical and structural properties of neodymium-doped KPO3-MoO3 glasses

Autor(es)

Galleani, Gustavo ; Santagneli, Silvia H. ; Ribeiro, Sidney J. L. ; Messaddeq, Younes ; Maia, Lauro J. Q. ; Nunes, Luiz A. O.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Non-Crystalline Solids; v. 458, p. 65-68, FEB 15 2017.
• Citações Web of Science: 4

Resumo

Glasses of composition (mol%) 75KPO(3)-(25-x)MoO3-xNd(3+), with 0 <= x <= 1.0, have been prepared and characterized. Thermal and structural properties of the glasses were studied by Differential Scanning Calorimetry (DSC) and Raman scattering spectroscopy. The thermal stability against crystallization on heating was evaluated. Absorption spectra in the visible and infrared regions were collected and analysed, and photoluminescence excitation and emission spectra were obtained under 804 nm diode laser excitations. Using the Judd-Ofelt formalism, the Omega(2), Omega(4), and,Omega(6) parameters and the radiative lifetime (tau(r)) were calculated for the F-4(3/2) excited state. A fluorescence quantum efficiency for this level (QE = tau f /tau(r)) of 58% was determined for glass with x = 0.6. (C) 2016 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 08/53680-0 - Estudo do efeito da substituição iônica do processo de oxirredução na estrutura dos vidros fosfatos contendo molibdênio e tungstênio
• Beneficiário: Silvia Helena Santagneli
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado