Structural and photoluminescence properties of europium-doped titania nanofibers prepared by electrospinning method

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• 作者：Jianguo Zhao ; Changwen Jia ; Huigao Duan ; Zhiwen Sun ; Xiaoming Wang ; Erqing Xie
• 关键词：Europium-doped titania ; Electrospinning ; Nanofiber ; Energy transfer ; Photoluminescence
• 刊名：Journal of Alloys and Compounds
• 出版年：2008
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：8 May 2008
• 卷：455
• 期：1-2
• 页码：497-500
• 文件大小：868 K

摘要

In this letter, we have studied photoluminescence (PL) properties of europium-doped titania (TiO₂:Eu³⁺) nanofibers fabricated by electrospinning. The nanostructured TiO₂:Eu³⁺ is characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Raman spectrum. When TiO₂:Eu³⁺ nanofibers are excited by 325 nm, their emission spectrum show emission lines associated with intra-4f transitions from ⁵D₁ and ⁵D₀ levels to ⁷F_j level of Eu³⁺ ions. In addition, the concentration quench effect, energy transfer and photoluminescence mechanism in TiO₂:Eu³⁺ nanofibers are also discussed.