Title: Sol-gel preparation and white up-conversion luminescence in rare-earth doped PbF2 nanocrystals dissolved in silica glass
Authors: del-Castillo, J ×
Yanes, A. C
Mendez-Ramos, J
Tikhomirov, Victor
Moshchalkov, Victor
Rodriguez, V. D #
Issue Date: Mar-2010
Publisher: Springer
Series Title: Journal of sol-gel science and technology vol:53 issue:3 pages:509-514
Abstract: 89.5(SiO2)10(PbF2)0.5(REF3) silicate glasses have been prepared using room temperature sol-gel processing of Si(OCH2CH3)(4), Pb(CH3COO)(2)center dot 3H(2)O, RE(CH3COO)(3)center dot nH(2)O and trifluoroacetic acid as a fluorinating agent, where RE stands for rare-earth ions, such as Yb3+, Er3+, Ho3+, Tm3+, or combinations of those ions. On heat treatment of these glasses at about 300-400 A degrees C, the rare-earth doped spherical PbF2 nanocrystals precipitate within SiO2 glass matrix providing transparent nano-structured glass-ceramics, while the diameter of the nanocrystals can be set in the range from 5 to 25 nm by varying time and temperature of the heat treatment. The structural and photoluminescence studies confirm the incorporation of rare-earth ions into the PbF2 nanocrystals and white and tuneable colour up-conversion luminescence has been detected in case of Yb3+-Er3+-Tm3+ and Yb3+-Ho3+-Tm3+ co-doped nanocrystals by varying dopant ratio and pump power.
ISSN: 0928-0707
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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