Journal
JOURNAL OF LUMINESCENCE
Volume 117, Issue 2, Pages 141-146Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2005.05.001
Keywords
after low; energy transfer; erbium ion; titanium ion
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A series of new long-lasting phosphor Gd2O2S:XEr,Ti are prepared by the conventional high-temperature solid-state method and their luminescent properties are systematically investigated in this paper. The characteristic afterglow emission of Er, which is due to the transition of F-4(9/2) -> I-4(15/2) and S-4(3/2) -> I-4(15/2), is reported for the first time. XRD, photoluminescence, long-lasting phosphorescence and decay curves are used to characterize the synthesized phosphors. The possible energy transfer mechanism of Gd2O2S:xEr,Ti is also investigated. (c) 2005 Elsevier B.V. All rights reserved.
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