Journal
OPTICAL MATERIALS
Volume 29, Issue 12, Pages 1591-1594Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2006.06.021
Keywords
Eu3+; red-emitting phosphors; white LEDs
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It has been found that charge compensated CaMoO4:Eu3+ phosphors show greatly enhanced red emission under 393 and 467 nm-excitation, compared with CaMoO4:Eu3+ without charge compensation. Two approaches to charge compensation, (a) 2Ca(2+) -> EU3+ + M+, where M+ is a monovalent cation like Li+, Na+ and K+ acting as a charge compensator; (b) 3Ca(2+) -> 2EU(3+) + vacancy, are investigated. The influence of sintering temperature and Eu3+ concentration on the luminescent property of phosphor samples is also discussed. (c) 2006 Published by Elsevier B.V.
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