Radio-luminescence, time resolved photo-luminescence and Raman spectroscopy measurements were performed on Ce-doped sol-gel silica glasses. Quenching of the 5d-4f Ce3+ emission transition was observed by increasing Ce 3+ concentration above 0.04 mol%, evidenced by a decrease of the emission intensity accompanied by the appearance of a fast component in the photoluminescence time decay. Raman measurements revealed the formation of CeO2 clusters, which can be considered a cause of the observed luminescence quenching.
Vedda, A., Chiodini, N., DI MARTINO, D., Fasoli, M., Martini, M., Paleari, A., et al. (2005). Rare-earth aggregates in sol-gel silica and their influence on optical properties. PHYSICA STATUS SOLIDI C, 2(1), 620-623 [10.1002/pssc.200460249].
Rare-earth aggregates in sol-gel silica and their influence on optical properties
VEDDA, ANNA GRAZIELLA;CHIODINI, NORBERTO;DI MARTINO, DANIELA;FASOLI, MAURO;MARTINI, MARCO;PALEARI, ALBERTO MARIA FELICE;SPINOLO, GIORGIO MARIO;
2005
Abstract
Radio-luminescence, time resolved photo-luminescence and Raman spectroscopy measurements were performed on Ce-doped sol-gel silica glasses. Quenching of the 5d-4f Ce3+ emission transition was observed by increasing Ce 3+ concentration above 0.04 mol%, evidenced by a decrease of the emission intensity accompanied by the appearance of a fast component in the photoluminescence time decay. Raman measurements revealed the formation of CeO2 clusters, which can be considered a cause of the observed luminescence quenching.
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