Fluorescence line-narrowing study of Eu{sup 3+}-doped sol-gel silica: Effect of modifying cations on the clustering of Eu{sup 3+}

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Chemistry of Materials

DOI:https://doi.org/10.1021/cm9504910· OSTI ID:285011

Costa, V C; Lochhead, J; Bray, K L ^[1]

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1. Univ. of Wisconsin, Madison, WI (United States)

Fluorescence line-narrowing spectroscopy is used to characterize the effect of metal cation codopants (Sr{sup 2+}, La{sup 3+}, Gd{sup 3+}, Y{sup 3+}, Lu{sup 3+}, Sc{sup 3+}, and Ga{sup 3+}) on the state of aggregation of Eu{sup 3+} in sol-gel silica. Significant Eu{sup 3+} clustering occurs in samples doped only with Eu{sup 3+}. The addition of codopants inhibits the clustering of Eu{sup 3+} and promotes better dispersion of Eu{sup 3+} in the glasses. The extent of the inhibition of clustering increases with field strength of the codopant and levels off at high field strength. The inhibition of clustering is correlated with the generation of strong crystal field bonding sites for Eu{sup 3+} in the presence of codopants. Characteristics of these sites include the presence of Eu-O-M (M=codopant) linkages and stronger interactions with the network-forming regions of the glass. Supporting luminescence decay and Raman spectroscopy measurements are also presented. 61 refs., 7 figs., 2 tabs.

• OSTI ID: 285011
• Journal Information: Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 3 Vol. 8; ISSN CMATEX; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
CATIONS
CRYSTAL DOPING
EUROPIUM
FLUORESCENCE SPECTROSCOPY
GADOLINIUM
GALLIUM
LANTHANUM
LUMINESCENCE
LUTETIUM
RAMAN SPECTROSCOPY
SCANDIUM
SILICA GEL
STRONTIUM
YTTRIUM