Synthesis, Characterization and Luminescent Properties of La2Zr2O7:Eu3+ Nanorods
- Received Date: 2012-11-18
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 5DO→7F2 electric dipole transition of Eu3+ ions. Meanwhile, it was more interesting to note that the emission of 5D1→7FJ (J=0, 1, 2) transitions and the splitting patterns of 5D0→7FJ (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.
|Citation:||He-juan Song, Li-qun Zhou, Ying Huang, Ling Li, Ting Wang, Lan Yang. Synthesis, Characterization and Luminescent Properties of La2Zr2O7:Eu3+ Nanorods[J]. Chinese Journal of Chemical Physics , 2013, 26(1): 83-87. doi: 10.1063/1674-0068/26/01/83-87|