Characterization of nano-size YVO4 : Eu and (Y, Gd)VO4 : Eu phosphom by low voltage cathodo- and photoluminescence

Low voltage cathodoluminescence (LVCL) and photoluminescence measurement were carried out to better understand the role of Gd in (Y,Gd)VO4:Eu phosphor and to compare two different synthesis methods (solid-state reaction, coprecipitation reaction) and their preparing conditions. From the analysis of LVCL measurement, it is understood that the luminescence of YVO4: Eu and (Y,Gd)VO4:Eu phosphors might be interpreted as originating from a two-level system and for reasons of enhanced luminescence intensity of (Y,Gd)VO4:Eu phosphor, the effect of Gd on the symmetry of Eu sites dominates over that of interaction between Gd and Eu. It is also found that nano-size phosphor Of YVO4:Eu synthesized by coprecipitation reaction shows lower quantum yield in comparison with that synthesized by solid-state reaction due to the presence of secondary phase produced after heat treatment. (c) 2005 American Vacuum Society.
Publisher
A V S AMER INST PHYSICS
Issue Date
2005-03
Language
ENG
Keywords

LUMINESCENCE PROPERTIES; COLLOIDAL YVO4-EU

Citation

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, v.23, no.2, pp.843 - 848

ISSN
1071-1023
URI
http://hdl.handle.net/10203/3260
Appears in Collection
MS-Journal Papers(저널논문)
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