Rapid, Large-Scale, Morphology-Controllable Synthesis of YOF:Ln3+ (Ln = Tb, Eu, Tm, Dy, Ho, Sm) Nano-/Microstructures with Multicolor-Tunable Emission Properties

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• 作者：Yang Zhang ; Dongling Geng ; Xiaojiao Kang ; Mengmeng Shang ; Yuan Wu ; Xuejiao Li ; Hongzhou Lian ; Ziyong Cheng ; Jun Lin
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：November 18, 2013
• 年：2013
• 卷：52
• 期：22
• 页码：12986-12994
• 全文大小：703K
• 年卷期：v.52,no.22(November 18, 2013)
• ISSN：1520-510X

文摘

YOF:Ln³⁺ (Ln = Tb, Eu, Tm, Dy, Ho, Sm) nano-/microstructures with a variety of novel and well-defined morphologies, including nanospheres, nanorod bundles, and microspindles, have been prepared through a convenient modified urea-based homogeneous precipitation (UBHP) technique followed by a heat treatment. The sizes and morphologies of the YOF products could be easily modulated by changing the pH values and fluoride sources. XRD, TG-DTA, FT-IR, SEM, and TEM, as well as photoluminescence (PL) and cathodoluminescence (CL) spectra, were used to characterize the prepared samples. The YOF:Ln³⁺ nanospheres show the characteristic f鈥揻 transitions of Ln³⁺ (Ln = Tb, Eu, Tm, Dy, Ho, Sm) ions and give bright green, red, blue, yellow, blue-green, and yellow-orange emission, respectively, under UV light and low-voltage electron beam excitation. Furthermore, YOF:0.03Tb³⁺ phosphors exhibit green luminescence with superior properties in comparison with the commercial phosphor ZnO:Zn to a degree, which is advantageous for improving display quality. Because of the simultaneous luminescence of Ln³⁺ in the YOF host, the luminescence colors of YOF:Ln³⁺ phosphors can be precisely adjusted by changing the doped Ln³⁺ ions and corresponding concentrations, which makes these materials hold great promise for applications in field-emission displays.