Synthesis and Luminescent Properties of Violet-Ultraviolet Long Afterglow Phosphors

Abstract:

The M1.99MgSi2O7: Ce3+0.01 (M: Ba, Sr, Ca) phosphors were prepared by the solid-state reaction method. All the samples emit the violet-ultraviolet light with a broad emission band from about 330 nm to 500 nm. All the phosphors samples show a long afterglow. The strongest afterglow intensity and the longest decay duration of the afterglow come from the Ca1.99MgSi2O7: Ce3+0.01 sample. It is attributed to the suitable trap depth and the high trap concentration of this sample. The traps of these phosphors are induced by the lattice defects. A suitable model involving the cation vacancies and the oxygen vacancies, which act as the hole traps and the electron traps respectively, is proposed.

• Periodical: Materials Science Forum (Volumes 663-665)
• Pages: 170-176
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.663-665.170
• Online since: November 2010
• Authors: Hao Yi Wu, Yi Hua Hu, Yin Hai Wang, Chu Jun Fu, Feng Wen Kang, Xiang Li
• Keywords: Lattice Defect, Long Afterglow, Violet-Ultraviolet

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DOI: 10.1016/j.jallcom.2003.11.064