Author:
Cheng Shuai ,Xu Xu-Hui ,Wang Peng-Jiu ,Qiu Jian-Bei ,
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.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy