Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5403123 | Journal of Luminescence | 2009 | 4 Pages |
Abstract
A new long afterglow phosphor Y2O2S:Ti4+, Mg2+ co-doped with Gd3+ and Lu3+ was synthesized by solid-state reaction in inert gas ambient. Its properties were systematically analyzed by X-ray diffraction (XRD), luminescence spectra, afterglow decay curves and thermoluminescence (TL) spectra. It was found that the long afterglow performance of Y2O2S:Ti4+, Mg2+ such as brightness and persistent time was largely improved when co-doped with Gd3+ and Lu3+. By analyzing the TL curve the activation energy E were calculated to be 0.64Â eV for 388Â K peak and 0.98Â eV for 508Â K peak, and the trap intensity related to 388Â K peak is much stronger than that related to 508Â K peak. The mechanism of the long afterglow was also discussed in this paper.
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Authors
Luxiang Wang, Li Zhang, Yudai Huang, Dianzeng Jia, Juanjuan Lu,