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Photoluminescence of cerium–europium co‐doped SiO 2 phosphor prepared by a sol–gel process
Author(s) -
Ntwaeaborwa O. M.,
Swart H. C.,
Kroon R. E.,
Holloway P. H.,
Botha J. R.
Publication year - 2006
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.2145
Subject(s) - photoluminescence , phosphor , europium , cerium , activator (genetics) , analytical chemistry (journal) , doping , sol gel , ultraviolet , materials science , fluorescence , luminescence , ion , energy transfer , chemistry , optics , optoelectronics , nanotechnology , metallurgy , chromatography , biochemistry , physics , organic chemistry , molecular physics , gene
Ce 3+ and Eu 3+ ions were simultaneously incorporated into a SiO 2 matrix by a sol–gel process, resulting in a phosphor that could be used in applications such as fluorescent lamps, solid state lasers, optical waveguides and field emission displays. Variation between blue and red emissions was obtained when co‐doped SiO 2 :Ce,Eu powders with concentrations ranging from 0 to 5 mol% were exposed to ultraviolet light. An enhanced photoluminescence (PL) intensity from Ce 3+ , probably due to energy transfer from Eu 3+ , was observed for activator concentrations ranging from 0 to 1 mol%. Comparatively low PL intensities, especially from Ce 3+ , associated with concentration‐quenching were observed for activator concentrations in the range of 2–5 mol%. Copyright © 2006 John Wiley & Sons, Ltd.