Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5437780 | Ceramics International | 2017 | 21 Pages |
Abstract
Single-component white-emitting Sr3Y(PO4)3:Dy3+ phosphors were synthesized by a high-energy deformation process. X-ray diffraction patterns showed the resulting crystallized phase to be of cubic structure, space group I-43d (no. 220). The broad-band excitation spectra between 250 and 500Â nm were observed by monitoring the emission wavelength at 576Â nm, which matches well with commercial near-UV or blue LED chips. Under a 352Â nm excitation, the emission peaks were observed at 483Â nm (blue), 576Â nm (yellow), and 666Â nm (red), corresponding to the 4F9/2 â 6H15/2, 4F9/2 â 6H13/2, and 4F9/2 â 6H11/2 transitions of Dy3+ ions. The optimized doping concentration of Dy3+ ion was 8Â mol%. By controlling the Dy3+ ion concentration, tunable colors from white to yellow were obtained in Sr3Y(PO4)3:Dy3+ phosphors. These results reveal that studied materials may be a promising candidate for white LED applications.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yeon Woo Seo, Sung Heum Park, Seo Hyoung Chang, Jung Hyun Jeong, Kwang Ho Kim, Jong-Seong Bae,