Photoluminescence of Ce3+,Tb3+: Y2O3 nanoclusters embedded in SiO2 sol-gelglasses

Authors
Jia, WY Wang, YY Fernandez, F Wang, XJ Huang, SH Yen, WM
Citation
Wy. Jia et al., Photoluminescence of Ce3+,Tb3+: Y2O3 nanoclusters embedded in SiO2 sol-gelglasses, MAT SCI E C, 16(1-2), 2001, pp. 55-58
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS
ISSN journal
09284931 → ACNP
Volume
16
Issue
1-2
Year of publication
2001
Pages
55 - 58
Database
ISI
SICI code
0928-4931(20011020)16:1-2<55:POCYNE>2.0.ZU;2-Y
Abstract
Ce3+ doped and Ce3+,Tb3+ codoped Y2O3 nanoclusters embedded in SiO2 glasses were prepared by sol-gel method. Intensive photoluminescence with a strong blue band at 420 nm and a weaker band at 480 nm was observed from 1% Ce3:10% Y2O3-SiO2 samples, and strong green emission at 543 mn from Tb was obt ained in 1% Ce3+,1% Tb3+ :10% Y2O3-SiO2 samples. Excitation spectra reveal that the 5d state of Ce3+ covers UV range from 240 to 380 nm; energy transf er from 5d state of Ce3+ to Tb3+ is very efficient, and the absorption of C e3+ in UV is the dominant energy source for the green emission of Tb3+. (C) 2001 Elsevier Science B.V. All rights reserved.