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Eu和Dy包覆纳米ZnO的发光特性的研究
  • 期刊名称：光谱学与光谱分析
  • 时间：0
  • 页码：1185-1188
  • 语言：中文
  • 分类：O482.3[理学—固体物理;理学—物理]
  • 作者机构：[1]广东工业大学物理与光电工程学院,广东广州510006
  • 相关基金：国家自然科学基金项目（20871033 10774031）资助
  • 相关项目：长余辉量子点的制备及发光性能研究
作者： 廖臣兴|张伟|王银海|罗莉|胡义华|
关键词： ZnO, 稀土, 光致发光, 能量传递, ZnO, Rare-earths, Photoluminescence, Energy transfer
中文摘要：

通过共沉淀法制备了Eu和Dy包覆的纳米ZnO材料。X射线衍射被用来测量样品的结构和粒径。光致发光测量显示325 nm的紫外光能很好激发Eu3＋的612 nm的红光发射和Dy3＋的484和575 nm发射,显示氧化锌基质与Eu3＋和Dy3＋之间实现了能量传递,并对能量传递的机制进行了讨论。在Eu和Dy共同包覆的样品中,通过能量传递可能在紫外激发下实现白光发射。

英文摘要：

Some kinds of phosphors were synthesized with Eu/Dy coating ZnO nanocrystals by co-precipitation approach derived from Zn（AC）2·2H2O,NaOH as precursors.The crystal structure and size were characterized by the X-ray diffraction.Photoluminescence（PL） measurements show an intense red luminescence at 612 nm caused by transition of Eu3＋ ions in ZnO∶Eu3＋ and intense luminescence band at 484 and 575 nm caused by transition of Dy3＋ ions in ZnO∶Dy3＋.The results show that the energy transfer was realized from the host to the rare earth ions.The mechanism of the energy transfer was discussed.Meanwhile Eu/Dy co-coating nano ZnO can be achieved white light emission by energy transfer.

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