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Abstract

A series of β-Sr2SiO4: Eu2+, La3+ phosphors have been synthesized via high temperature solid state reaction. Photoluminescence (PL), long persistent luminescence (LPL), and the photo-stimulated luminescence (PSL) suggest that Eu2+ ions occupy Sr(1) and Sr(2) sites. Significant enhancement of PL, LPL and PSL has been observed by co-doping La3+ in β-Sr2SiO4: Eu2+, La3+. Meanwhile, the introduction of La3+ ions increases significantly the intensities of the TL bands (T1 and T3 regions), and promotes the formation of a large number of traps in LPL and PSL. In addition, the observation of the PSPL(photo-stimulated long persistent luminescence) phenomenon demonstrates the occurrence of electrons which are retrapped by the shallow traps in the LPL process.

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1.
Funds:Project supported by the National Natural Science Foundation of China (Grant Nos. 51272097, 61265004, 11204113), and the Natural Science Foundation of Yunnan Province, China (Grant No. 2011C13211709).

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Vol. 64, Issue 1 - 2015-01-05

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