Article ID Journal Published Year Pages File Type
7839861 Journal of Luminescence 2018 19 Pages PDF
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 627 nm under excitation at 980 nm, ascribed to the transitions of 5D4→7Fj (j = 3, 4, 5, 6) by tunneling process. While PL spectrum exhibits peaks related to the transitions of 5D3, 5D4→7Fj (j = 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
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