Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7839861 | Journal of Luminescence | 2018 | 19 Pages |
Abstract
A novel green-emitting phosphor Ba2Ga2GeO7: Tb3+, Bi3+ was successfully synthesized by solid-state reaction. The photoluminescence (PL), photo-stimulated luminescence (PSL) and long persistent luminescence (LPL) were investigated in detail. After pre-irradiation upon UV light, the PSL spectrum of Ba2Ga2GeO7: Tb3+, Bi3+ exhibits peaks centered at 493, 547, 589, and 627â¯nm under excitation at 980â¯nm, ascribed to the transitions of 5D4â7Fj (jâ¯=â¯3, 4, 5, 6) by tunneling process. While PL spectrum exhibits peaks related to the transitions of 5D3, 5D4â7Fj (jâ¯=â¯3, 4, 5, 6). Thermo-luminescence (TL) curve shows that a large amount of traps can be in Ba2Ga2GeO7: Tb3+ by induced Bi3+, leading to the improvement of PSL spectra performance. These findings open a vista of possible avenues for the understanding of the PSL process.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Shuyu Tian, Lei Zhao, Wenbo Chen, Zhichao Liu, Xiaotong Fan, Qiuhong Min, Huan Yu, Xue Yu, Jianbei Qiu, Xuhui Xu,