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B and P Glass Formers as Stabilizers of Luminescent Ce(III) in Silica-Based Glasses

Published online by Cambridge University Press:  01 February 2011

C. Canevali
Affiliation:
INSTM, Dept. Scienza dei Materiali, Univ. Milano-Bicocca, via Cozzi, 53, 20125 Milano, Italy
M. Mattoni
Affiliation:
INSTM, Dept. Scienza dei Materiali, Univ. Milano-Bicocca, via Cozzi, 53, 20125 Milano, Italy
F. Morazzoni
Affiliation:
INSTM, Dept. Scienza dei Materiali, Univ. Milano-Bicocca, via Cozzi, 53, 20125 Milano, Italy
R. Scotti
Affiliation:
INSTM, Dept. Scienza dei Materiali, Univ. Milano-Bicocca, via Cozzi, 53, 20125 Milano, Italy
R. Krsmanovic
Affiliation:
Dept. Chimica Fisica, Univ. Ca’ Foscari, via Torino, 155/b, 30172 Venezia-Mestre, Italy
S. Polizzi
Affiliation:
Dept. Chimica Fisica, Univ. Ca’ Foscari, via Torino, 155/b, 30172 Venezia-Mestre, Italy
M. Bettinelli
Affiliation:
Dept. Scientifico e Tecnologico, Univ. Verona, strada le Grazie, 15, 37134 Verona, Italy
A. Speghini
Affiliation:
Dept. Scientifico e Tecnologico, Univ. Verona, strada le Grazie, 15, 37134 Verona, Italy
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Abstract

Ce3+-doped boro, phospho and borophosphosilicate monolithic glasses (BSG, PSG and BPSG) were prepared by sol-gel method. The inclusion of the glass formers P and B in silica lowered the tendency of rare earth (RE) to segregate as CeO2 with respect to pure SiO2 matrix (SG). In PSG and BPSG, Ce3+ co-ordination to P=O groups was responsible for the inhibition of both CeO2 segregation and oxidation of isolated Ce3+ ions to Ce4+. The better ion dispersion in the host matrix and the stabilization of Ce3+ oxidation state improved PSG and BPSG luminescence properties with respect to BSG and SG.

Type
Research Article
Copyright
Copyright © Materials Research Society 2005

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B and P Glass Formers as Stabilizers of Luminescent Ce(III) in Silica-Based Glasses
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