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Proceedings Paper

Lathanide-doped hybrid organic-inorganic nanocomposites
Author(s): Bruno Viana; Eloisa Cordoncillo; Clotilde Philippe; Clement Sanchez; F. Javier Guaita; Purificiation Escribano
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Paper Abstract

Sol-gel matrices have been investigated for some years as potential matrices for rare earth luminescence. The design of sol-gel matrices inside which the hydroxyl content can be minimized and/or inside which the rare earth is protected via complexation or encapsulation is desirable to avoid the RE3+ luminescence quenching. We have investigated the Nd3+ Sm3+, Dy3+, Er3+ and Tm3+ optical properties in siloxane-zirconium hybrid matrices prepared at room temperature. In these hydrophobic matrices, RE3+ fluorescence is always observed but lifetimes and quantum yields are strongly dependent on the synthetic procedure. By using the reducing power of the hydridosilanes precursors, it is also possible to prepare hybrid materials with cations in different valence states. The in situ formation of hydrogen, provided by the cleavage of the Si-H bonds during hydrolysis and condensation reactions, reduces the europium and cerium in Eu2+ and Ce3+ leading to a broad visible emission. In addition to this emission, a blue emission of the sol-gel matrices under UV excitation is also observed.

Paper Details

Date Published: 2 May 2000
PDF: 11 pages
Proc. SPIE 3943, Sol-Gel Optics V, (2 May 2000); doi: 10.1117/12.384330
Show Author Affiliations
Bruno Viana, Univ. Pierre et Marie Curie (France)
Eloisa Cordoncillo, Univ. Jaume I (Spain)
Clotilde Philippe, Univ. Pierre et Marie Curie (France)
Clement Sanchez, Univ. Pierre et Marie Curie (France)
F. Javier Guaita, Univ. Jaume I (Spain)
Purificiation Escribano, Univ. Jaume I (Spain)


Published in SPIE Proceedings Vol. 3943:
Sol-Gel Optics V
Bruce S. Dunn; Edward J. A. Pope; Helmut K. Schmidt; Masayuki Yamane, Editor(s)

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