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Fluorescence Line Narrowing Studies of Eu3+-Doped Silica Gel-Glasses

Published online by Cambridge University Press:  21 February 2011

M. J. Lochhead  and
K. L. Bray
M. J. Lochhead
Affiliation:
Department of Chemical Engineering, University of Wisconsin, 1415 Johnson Dr., Madison, WI 53706
K. L. Bray
Affiliation:
Department of Chemical Engineering and Materials Science Program, University of Wisconsin, 1415 Johnson Dr., Madison, WI 53706
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Abstract

Broadband fluorescence and fluorescence line narrowing (FLN) spectra are presented for Eu3+ ions in Eu2O3-SiO3 and Eu2O3-Al2O3-SiO3 systems prepared by the sol-gel process. Clustering of rare earth ions in silica glass can be a limiting factor in the design and engineering of optical device materials. The addition of Al2O3 is known to help disperse rare earth ions in sol-gel silica. In order to develop a more detailed understanding of how Eu3+ is incorporated in these materials, time-resolved, laser-induced FLN studies at 77 K have been performed using a pulsed dye laser to selectively excite subsets of ions in the inhomogeneously broadened 7F0⇆ 5D0 manifold. Fluorescence spectra are discussed in terms of rare earth ion clustering, energy transfer, and bonding site symmetry. It is concluded that Eu3+ ions cluster in sol-gel silica and that the addition of alumina assists in dispersing Eu3+ ions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 745
Copyright
Copyright © Materials Research Society 1998

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References

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