A novel rare-earth free red long-persistent phosphor: Mg2GeO4:Mn4+

作者：Xue, Feihong; Hu, Yihua^*; Chen, Li; Wu, Haoyi; Ju, Guifang; Wang, Tao; Yang, Lv

来源：Ceramics International, 2017, 43(17): 15141-15145.

DOI：10.1016/j.ceramint.2017.08.044

• Luminescence
• Phosphors
• Defects
• Long afterglow

Red-emitting long-persistent phosphor Mg2GeO4: Mn4+ was prepared by a high-temperature solid-state reaction. The photoluminescence and afterglow properties of Mg2GeO4: Mn4+ phosphors were studied systematically. Furthermore, to improve the afterglow performance, co-doped Re3+ (Re = Pr, Er, Nd and Yb) ions into Mg2GeO4: Mn4+ separately to adjust the trap depth or increase the trap density was performed. The duration of Mg2GeO4: Mn4+ can be observed 30 min by naked eyes, and the initial brightness and afterglow duration are significantly improved after Re3+ ions are doped respectively. Especially, the afterglow emission of Mg2GeO4: Mn4+, Yb3+ can last for 2 h. This investigation shows up a rare Mn4+-doped long afterglow phenomenon, and provides a new and efficient red afterglow material for potential application.

• 出版日期2017-12-1
• 单位广东工业大学