Controlled Fabrication and Shape-Dependent Luminescence Properties of Hexagonal NaCeF4, NaCeF4:Tb3+ Nanorods via Polyol-Mediated Solvothermal Route

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• 作者：Xuesong Qu ; Hyun Kyoung Yang ; Guohui Pan ; Jong Won Chung ; Byung Kee Moon ; Byung Chun Choi ; Jung Hyun Jeong
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：April 18, 2011
• 年：2011
• 卷：50
• 期：8
• 页码：3387-3393
• 全文大小：960K
• 年卷期：v.50,no.8(April 18, 2011)
• ISSN：1520-510X

文摘

Hexagonal monodisperse NaCeF₄ and NaCeF₄:Tb³⁺ nanorods have been successfully synthesized by a polyol-mediated solvothermal route with ethylene glycol (EG) as solvent. The crystalline phase, size, morphology, and luminescence properties were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and photoluminescence (PL) spectra as well as dynamic decays. The experimental results indicate that the content of NH₄F and NaNO₃ are crucial in controlling product morphology and size. Nanorods with different aspect ratios could be controllably obtained under settled conditions. Shape-dependent luminescence and energy transfer routes from Ce³⁺ to Tb³⁺ in NaCeF₄:Tb³⁺ nanorods were observed by the modified local crystal field environment around rare earth ions. The 4f鈭?d transitions of Ce³⁺ ions have much higher sensitivity to the anisotropic shape of samples than that of Tb³⁺ ions.