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La2Zr2O7:Eu3+纳米棒的合成、表征及其荧光性能
宋荷娟,周立群*,黄莹,李玲*,王婷,杨兰
作者单位E-mail
宋荷娟 湖北大学有机功能分子合成与应用教育部重点实验室湖北大学化学化工学院武汉 430062  
周立群* 湖北大学有机功能分子合成与应用教育部重点实验室湖北大学化学化工学院武汉 430062 zlq@hubu.edu.cn 
黄莹 湖北大学有机功能分子合成与应用教育部重点实验室湖北大学化学化工学院武汉 430062  
李玲* 湖北大学有机功能分子合成与应用教育部重点实验室湖北大学化学化工学院武汉 430062 liling402431@hotmail.com 
王婷 湖北大学有机功能分子合成与应用教育部重点实验室湖北大学化学化工学院武汉 430062  
杨兰 湖北大学有机功能分子合成与应用教育部重点实验室湖北大学化学化工学院武汉 430062  
摘要:
采用传统固相法和水热法成功地制备出棒状La2Zr2O7:Eu3+荧光粉. 利用X射线粉末衍射仪、透射电镜和荧光光谱仪等分析了产物的结构、形貌和发光特性. 结果表明红色荧光粉La2Zr2O7:Eu3+有良好的晶相,属于立方结构,空间点群为Fd3m; 其形貌主要为纳米棒, 平均直径约47 nm, 长度为50~700 nm. 并对纳米棒的生长机理进行了探讨. 在466 nm蓝光激发下,La2Zr2O7:Eu3+荧光粉能发射出Eu3+的特征红色荧光,发射主峰位于616 nm处,归属于Eu3+5DO7F2超灵敏电偶极跃迁.此外,在产物的发射光谱中能够观察到5D17FJ (J=0, 1, 2)跃迁和5D17FJ (J=1, 2, 4)跃迁的劈裂峰,这说明Eu3+处在低对称性的晶体场格位中.
关键词:  La2Zr2O7:Eu3+,烧绿石结构,纳米棒荧光性能
DOI:10.1063/1674-0068/26/01/83-87
分类号:
基金项目:
Synthesis, Characterization and Luminescent Properties of La2Zr2O7:Eu3+ Nanorods
He-juan Song,Li-qun Zhou*,Ying Huang,Ling Li*,Ting Wang,Lan Yang
Abstract:
The Eu3+-doped La2Zr2O7 phosphor with rod-like morphology was successfully synthesized by conventional solid state reaction and hydrothermal method. X-ray diffraction patterns, transmission electron microscopy, and photoluminescence spectra were employed to charac-terize its structure and morphology as well as luminescent properties. The results indicated that the red-emitting phosphor La2Zr2O7:Eu3+ had well crystallized and belonged to the cubic structure with space group of Fd3m. The as-obtained product mainly appeared as straight nanorods with an average diameter of 47 nm and length of 50-700 nm. The pos-sible growth mechanism was also discussed. It was found that under blue excitation with a wavelength of 466 nm, the La2Zr2O7:Eu3+ phosphor exhibited a characteristic red emission at 616 nm that was attributed to the hypersensitive 5DO7F2 electric dipole transition of Eu3+ ions. Meanwhile, it was more interesting to note that the emission of 5D17FJ (J=0, 1, 2) transitions and the splitting patterns of 5D07FJ (J=1, 2, 4) transitions of Eu3+ ions can be observed in the luminescent spectra of La2Zr2O7:Eu3+. It was demonstrated that Eu3+ preferred to occupy a low symmetry site.
Key words:  La2Zr2O7:Eu3+, Pyrochlore structure, Nanorod, Luminescence