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Proceedings Paper

Fluorescent properties of Tb-doped borosilicate glass films prepared by a sol-gel method
Author(s): Kazuhiko Tonooka; Katsuyoshi Shimokawa; Okio Nishimura
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Paper Abstract

Rare earth elements have been used as optical dopants in glasses for many years. Boro-silicate glass films doped with rare-earths were deposited on glass substrates by using a simple sol-gel method. To avoid the undesirable precipitation due to the different hydrolysis rates between silicon and boron alkoxides, two solutions were used for dip-coating separately. One solution consisted of silicon tetraethoxide, ethanol, water and terbium nitrate as the Tb dopant. Another consisted of triethyl borate. Layer-by-layer deposition was applied by dipping into solutions containing metal alkoxides in sequence. The fluorescence properties of Tb3+ were investigated for the boro-silicate samples in relation to the firing effect. As-deposited silicate and boro-silicate samples showed similar fluorescence spectra under UV excitation. After firings at about 800 degrees C, a remarkable increase of the Tb3+-ion fluorescence was observed for the boro-silicate samples, while the silicate sample showed a little increase in fluorescence intensity. These experimental results suggested the formation of boro- silicate network and the incorporation of Tb3+ into the boro-silicate matrix. The multilayer process was found useful to fabricate multi-component sol-gel films.

Paper Details

Date Published: 27 April 2001
PDF: 7 pages
Proc. SPIE 4282, Rare-Earth-Doped Materials and Devices V, (27 April 2001); doi: 10.1117/12.424776
Show Author Affiliations
Kazuhiko Tonooka, Hokkaido National Industrial Research Institute (Japan)
Katsuyoshi Shimokawa, Hokkaido National Industrial Research Institute (Japan)
Okio Nishimura, Hokkaido National Industrial Research Institute (Japan)

Published in SPIE Proceedings Vol. 4282:
Rare-Earth-Doped Materials and Devices V
Shibin Jiang, Editor(s)

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