Article ID Journal Published Year Pages File Type
5403123 Journal of Luminescence 2009 4 Pages PDF
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 0.64 eV for 388 K peak and 0.98 eV for 508 K peak, and the trap intensity related to 388 K peak is much stronger than that related to 508 K peak. The mechanism of the long afterglow was also discussed in this paper.
Related Topics
Physical Sciences and Engineering Chemistry Physical and Theoretical Chemistry
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