日光激发蓝色长余辉材料Ca_(12)Al_(14)O_(33):Eu^(2+),Nd^(3+)的制备与性能研究  

Preparation and Properties of Sunlight Activated Blue Persistent Luminescence Material Ca_(12)Al_(14)O_(33):Eu^(2+),Nd^(3+)

作　　者：田松鹭 冯鹏 乔鑫[2] 王育华[1] Tian Songlu;Feng Peng;Qiao Xin;Wang Yuhua(National Local Joint Engineering Laboratory of Photoconversion Materials and Technologies,School of Materials and Energy,Lanzhou University,Lanzhou 730000,China;Baotou Rare Earth Research Institute,Baotou 014030,China)

机构地区：[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

出　　处：《中国稀土学报》2024年第5期894-900,I0002,共8页Journal of the Chinese Society of Rare Earths

基　　金：北方稀土项目(NERE201908)资助。

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Ca_(12)Al_(14)O_(33):Eu^(2+),Nd^(3+)。材料的发射峰位于446 nm处。在室外太阳光的辐照条件下,在Eu^(2+)掺杂的基础上,通过共掺Nd^(3+),成功地将余辉时间由Ca_(12)Al_(14)O_(33):Eu^(2+)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Nd^(3+)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。In this thesis,aiming at developing blue persistent luminescence(Pers L)materials that can be excited by sunlight,a series of blue PersL phosphors Ca_(12)Al_(14)O_(33):Eu^(2+),Nd^(3+)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 Nd^(3+).By means of the analysis of thermoluminescence curves,it indicates that co-doping of Nd^(3+)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.Finally,a feasible Pers L mechanism was discussed.

关 键 词：蓝色长余辉 陷阱 热释光 稀土 

分 类 号：O614.33[理学—无机化学]