日光激发蓝色长余辉材料Ca12Al14O33∶Eu2+,Nd3+的制备与性能研究
Preparation and Properties of Sunlight Activated Blue Persistent Luminescence Material Ca12Al14O33∶Eu2+,Nd3+
田松鹭 1冯鹏 1乔鑫 2王育华1
作者信息
- 1. 兰州大学材料与能源学院光转换材料与技术国家地方联合工程实验室,甘肃兰州 730000
- 2. 包头稀土研究院,内蒙古包头 014030
- 折叠
摘要
以开发日光激发的蓝色长余辉材料为研究目标,采用高温固相反应法成功制备了系列蓝色长余辉发光材料Ca12Al14O33∶Eu2+,Nd3+.材料的发射峰位于446 nm处.在室外太阳光的辐照条件下,在Eu2+掺杂的基础上,通过共掺Nd3+,成功地将余辉时间由Ca12Al14O33:Eu2+的400 s提升至约6000 s,余辉初始亮度可超500 mcd·m-2.借助热释光曲线分析可知,共掺Nd3+可以使适合余辉产生的浅陷阱的浓度大幅提高,陷阱深度大约0.7 eV,更有利于余辉的产生.最后,探讨了长余辉机制.
Abstract
In this thesis,aiming at developing blue persistent luminescence(Pers L)materials that can be ex-cited by sunlight,a series of blue PersL phosphors Ca12Al14O33∶Eu2+,Nd3+was successfully synthesized through high-temperature solid-state reaction method.The emission peak of this material is located at 446 nm.Under the condition of simulated solar radiation,the duration time is increased from 400 to about 6000 s while the initial brightness of material can exceed 500 mcd·m-2 by co-doping Nd3+.By means of the analysis of thermolumines-cence curves,it indicates that co-doping of Nd3+can greatly increase the concentration of shallow traps suitable for Pers L.The trap depth is about 0.7 eV,which is more conducive to the generation of Pers L.F inally,a fea-sible Pers L mechanism was discussed.
关键词
蓝色长余辉/陷阱/热释光/稀土Key words
blue persistent luminescence/traps/thermoluminescence/rare earths引用本文复制引用
出版年
2024
NETL
NSTL
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