Photoluminescence and afterglow of Mn2+ doped lithium zinc silicate
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- 作者：Feihong Xue ; Yihua. Hu ; huyh@gdut.edu.cn ; Liumin Fan ; Xiaojuan Wang ; Guifang Ju ; Miao He ; Yang Lv
- 关键词：Long afterglow ; Thermoluminescence ; Trap depth
- 刊名：Journal of Luminescence
- 出版年：2017
- 出版时间：March 2017
- 年：2017
- 卷：183
- 期：Complete
- 页码：68-72
- 全文大小：2122 K
- 卷排序：183
文摘
Novel green emitting long lasting phosphorescence (LLP) Li1.14Zn1.43SiO4:Mn2+ (LZS: Mn2+) was prepared successfully through a conventional solid-state reaction. Phase purity was checked by X-ray diffraction. The photoluminescence and afterglow properties of as-prepared phosphors were studied systematically by diffuse reflectance spectra, photoluminescence spectra, decay curves, afterglow spectra and thermoluminescence glow curves measurements. The photoluminescence spectra and LLP spectra indicated that LZS: Mn2+ phosphors exhibits green emission center at 526 nm originated from 4T1→6A1 transition of Mn2+. The duration of Mn2+ doped Li1.14Zn1.43SiO4 phosphors can last about 1 h. Thermoluminescence glow curves indicated that the LLP of LZS: Mn2+ phosphor was generated by the suitable trap depth. Based on the experimental results, a model was constructed to discuss the mechanism of afterglow briefly.