Photoluminescence Characteristics of Pure and Dy-Doped ZnNb2O6 Nanoparticles Prepared by a Combustion Method

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• 作者：Yuanyuan Zhou ; Zifeng Qiu ; Mengkai L&uuml ; Qian Ma ; Aiyu Zhang ; Guangjun Zhou ; Haiping Zhang ; Zhongsen Yang
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：July 19, 2007
• 年：2007
• 卷：111
• 期：28
• 页码：10190 - 10193
• 全文大小：94K
• 年卷期：v.111,no.28(July 19, 2007)
• ISSN：1932-7455

文摘

Pure and Dy-doped ZnNb₂O₆ nanoparticles have been prepared by a sol-gel combustion method using citricacid as a fuel and complexing agent and nitrates as oxidants at a relatively low temperature as compared tosolid-state reaction methods. X-ray diffraction patterns of the pure ZnNb₂O₆ samples show that the ZnNb₂O₆nanoparticles exhibit an orthorhombic phase. Photoluminescence (PL) properties of all the undoped and Dy-doped samples are studied in detail. For the pure ZnNb₂O₆ samples, a strong blue emission band centered at445 nm and two weak emission bands centered at 525 and 625 nm, respectively, can be observed. For Dy-doped ZnNb₂O₆ samples, the luminescence of Dy³⁺ is observed with the host blue emission remaining andthe host emission intensity varying with the Dy-doping concentrations. This novel PL characteristic of thedoped samples may be attributed to the energy transfer between Dy³⁺ and niobate groups (NbO₆).