Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1528920 | Materials Science and Engineering: B | 2013 | 7 Pages |
Abstract
A novel reddish orange emitting long persistent phosphor CaO:Pr was prepared by a high temperature solid-state reaction method. All as-prepared phosphors were studied systematically by X-ray diffraction, photoluminescence (PL) spectra, decay curves, afterglow spectra and thermoluminescence (TL) glow curves. The intensity of PL and the performance of afterglow are dependent on the concentration of Pr3+ ions. The trap depth in the range between 0.5 and 0.7Â eV is suitable for long afterglow (LAG). The optimal concentrations of Pr3+ ions for the best characteristic PL emission and afterglow were experimentally calculated to be 0.05Â mol%. After irradiation by 273Â nm for 3Â min, the duration of reddish orange afterglow can last nearly 1Â h. The decay processes and mechanism of LAG in CaO:Pr3+ were also discussed in detail.
Keywords
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Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Yahong Jin, Yihua Hu, Li Chen, Xiaojuan Wang, Zhongfei Mou, Guifang Ju, Feng Liang,