A novel blue emitting europium doped lanthanum magnesium hexaaluminate long persistent phosphor and analysis of traps distribution

作者：Yu, Jing; Luo, Xingliang; Wang, Ziqi; Yu, Shuaishuai; Wu, Junxiao; Li, Ming; Li, Xinyu; Tang, Tao; Wen, Jianfeng^*; Zhao, Lei^*

来源：Journal of Luminescence, 2022, 243: 118671.

DOI：10.1016/j.jlumin.2021.118671

• LaMgAl11O19
• Eu2+
• Blue LPL
• Traps

Long persistent luminescent (LPL) materials are highly anti attention due to its energy conservation and environmental protection. Here, a novel blue LPL material LaMgAl11O19: Eu2+ (LMAO: Eu2+) have been synthesized successfully by high temperature solid state method, and its LPL properties was studied for the first time. The X-ray diffraction, refinement and crystal structure were used to characterize the phase composition of the synthesized samples. The LMAO: Eu2+ phosphor mainly exhibits blue center at 454 nm, which was mainly attributed to the 5 d-4f transition of Eu2+. The LPL properties were characterized by the LPL decay curves, LPL spectrum and the thermoluminescence (TL) curves. After removing the excitation source, a blue LPL is produced approximately 9 min. Finally, the trap distribution and LPL mechanism are analyzed in detail through TL spectroscopy.

• 单位
  桂林理工大学