Synthesis,Characterization and Luminescent Properties of La2Zr2O7:Eu3+ Nanorods |
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Authors: | He-juan Song Li-qun Zhou Ying Huang Ling Li Ting Wang Lan Yang |
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Institution: | Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China |
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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. |
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Keywords: | La2Zr2O7:Eu3+ Pyrochlore structure Nanorod Luminescence |
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