Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5403004 | Journal of Luminescence | 2009 | 4 Pages |
Abstract
Yttrium vanadate phosphors co-doped with Bi3+- and Sm3+ ions have been prepared via the solid-state reaction as well as via the sol-gel method. The luminescence studies demonstrate the potential of the prepared phosphors as multi-color emitters, which can be achieved by adjusting the excitation wavelengths. The excitation spectra of Bi3+- and Sm3+ co-doped phosphors clearly revealed energy transfer from Bi3+ to Sm3+ ions. When the co-doped phosphors were excited at 254Â nm, the emission from Bi3+ was dominant. Upon excitation at 365Â nm, the emission from both Bi3+ and Sm3+ was detected. With 410Â nm excitation, Sm3+ ions were selectively excited to yield intense red emission. It is shown that the prepared phosphors with optimal concentrations of Bi3+ and Sm3+ can be excited at 254, 365 and 410Â nm to yield yellow, orange and red emissions, respectively.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
V. Natarajan, A.R. Dhobale, Chung-Hsin Lu,