Ionic Liquid-Based Approach to Monodisperse Luminescent LaF3:Ce,Tb Nanodiskettes: Synthesis, Structural and Photoluminescent Properties
Ionic Liquid-Based Approach to Monodisperse Luminescent LaF3:Ce,Tb Nanodiskettes: Synthesis, Structural and Photoluminescent Properties
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基于离子液体的单分散发光 LaF3:Ce,Tb 纳米盘的方法：合成、结构和光致发光特性
DOI：
10.1166/jnn.2010.2066
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发表时间：
2010-03-01
影响因子：
--
通讯作者：
Li, ZhengQuan
中科院分区：
文献类型：
--
作者：
Guo, Hai;Zhang, Tian;Li, ZhengQuan
本文报道了一种新颖、简便的离子液体水热法合成高发光、水溶性LaF3：Ce、Tb纳米软盘(直径25 nm)。利用X射线衍射仪、透射电子显微镜和场发射扫描电子显微镜对LaF3，：Ce，Tb纳米软盘的结构进行了表征。离子液体[bmim]BF4在合成过程中既是助溶剂又是反应物。研究和讨论了EDTA-2Na对LaF3：Ce，Tb纳米发光材料形成的影响。研究了LaF3：Ce，Tb纳米软盘在254 nm激发下的固态和分散状态下的发光特性。与商用绿色荧光粉相比，其量子效率(固态)约为20%。光致发光性能表明，所制备的La0.8Ce0.15Tb0.05F3纳米软盘可以作为高分辨率显示器的荧光粉和生物分子的荧光标记。
In this paper, a novel and easy synthesis of highly luminescent, water-soluble LaF3:Ce,Tb nanodiskettes (25 nm in diameter) by ionic liquid-based hydrothermal process is reported. X-ray diffraction (XRD), transmission electron microscopy (TEM) and field emission scanning electron microscopy (FE-SEM) were used to characterize the structural properties of the LaF3,:Ce,Tb nanodiskettes. Ionic liquid [bmim]BF4 acts as both a co-solvent and a reactant during the synthesis. The effects of EDTA-2Na on the formation of green LaF3:Ce,Tb nanodiskette phosphors were studied and discussed. The luminescent properties of LaF3:Ce,Tb nanodiskettes have been investigated under 254 nm excitation both in solid state and dispersed in solution. The quantum efficiency (in solid state) is about 20% compared with commercial green phosphor. The photoluminescent properties show that the as-prepared La0.8Ce0.15Tb0.05F3 nanodiskettes may be applied as phosphors for high-resolution displays and fluorescent labels for biomolecules.