Morphology and luminescence of (GdY)(2)O-3 : Eu particles prepared by colloidal seed-assisted spray pyrolysis

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(GdxY1-x)(2)O-3:Eu [x=0, 0.25, 0.5, 0.75, 1.0] phosphor particles with 6 at.% Eu dopant of total concentration were prepared using spray pyrolysis. The effects of composition on the morphology, crystallinity, and photoluminescence characteristics of composite particles were investigated. The morphological control of (GdxY1-x)(2)O-3:Eu particles in spray pyrolysis was also attempted by using colloidal and aqueous solutions. The particles prepared from colloidal solutions containing small amounts of Gd or Y hydroxy carbonate sol as seed material had spherical and filled morphology after the post-treatment at high temperature. On the other hand, the (GdxY1-x)(2)O-3:Eu particles prepared from aqueous solutions were hollow and porous after post-treatment in all compositions. Particles prepared from colloidal solutions had photoluminescence emission intensities higher than those of particles prepared from aqueous solutions. (C) 2000 Academic Press.
Publisher
ACADEMIC PRESS INC
Issue Date
2000-08
Language
ENG
Article Type
Article
Keywords

PHOSPHOR PARTICLES; SUBMICRON SIZE; SOL

Citation

JOURNAL OF COLLOID AND INTERFACE SCIENCE, v.228, no.2, pp.195 - 199

ISSN
0021-9797
URI
http://hdl.handle.net/10203/9596
Appears in Collection
CBE-Journal Papers(저널논문)

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