Improved Luminescence of Lanthanide(III)-Doped Nanophosphors by Linear Aggregation

详细信息    查看全文

• 作者：Ling Li ; Wenge Jiang ; Haihua Pan ; Xurong Xu ; Yinxuan Tang ; Jiangzhou Ming ; Zhude Xu ; Ruikang Tang
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：March 22, 2007
• 年：2007
• 卷：111
• 期：11
• 页码：4111 - 4115
• 全文大小：270K
• 年卷期：v.111,no.11(March 22, 2007)
• ISSN：1932-7455

文摘

The studies and applications of nanophosphors are considerably important, but unfortunately, their luminescenceis always rather poor. Here, we report that the oriented aggregation of nanophosphors can significantly enhancetheir luminescent emissions at the nanoscale. LnPO₄ (Ln = La, Ce, and Tb) is extensively used in luminescentlighting industry, but the total quantum yield of synthesized individual ~20 nm La_0.60Ce_0.26Tb_0.14PO₄ particlesis only ~21%. This value is improved up to ~80% when five to seven of these nanophosphors are linearlyaggregated to form an oriented structure. The luminescence intensities of these linear aggregates ofnanophosphors increase correspondingly. It is suggested that one-dimensional nanoaggregation plays an essentialrole in this luminescence improvement, which might be a useful strategy in the application of nanophosphors.