| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5402385 | Journal of Luminescence | 2010 | 4 Pages |
Abstract
Ce3+ and Dy3+ activated Li2CaGeO4 phosphors were prepared by a solid-state reaction method, and characterized by XRD (X-ray diffraction) and photoluminescence techniques. The characteristic emission bands of Dy3+ due to 4F9/2â6H15/2 (blue) and 4F9/2â6H13/2 (yellow) transitions were detected in the emission spectra of Li2CaGeO4:Dy3+. Ce3+ broad band emission was observed in Li2CaGeO4:Ce3+ phosphors at 372 and 400Â nm due to 5dâ4f transition when excited at 353Â nm. Co-doping of Ce3+ enhanced the luminescence of Dy3+ significantly and concentration quenching occurs when Dy3+ is beyond 0.04Â mol%. White-light with different hues can be realized by tuning Dy3+ concentration in the phosphors.
Related Topics
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Physical and Theoretical Chemistry
Authors
Meng Jian-Xin, Yang Chuang-Tao, Chen Qing-Qing,