Li Gao-Ren, Dawa Ci-Ren, Lu Xi-Hong, Yu Xiao-Lan, Tong Ye-Xiang
MOE Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Institute of Optoelectronic and Functional Composite Materials, Sun Yat-Sen University, Guangzhou 510275, China.
Langmuir. 2009 Feb 17;25(4):2378-84. doi: 10.1021/la801601g.
Rare-earth ion-doped ZnO has been the focus of numerous investigations because of its unique optical properties and promising applications in optoelectronic devices. Here we presented a facile electrochemical deposition route for the controllable preparation of Eu3+/ZnO nanostructures on a large scale. The prepared Eu3+/ZnO deposits were characterized by scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, selected area electron diffraction, and X-ray photoelectron spectroscopy. Herein, the growth mechanisms of Eu3+/ZnO nanosheets and nanorods were discussed. The formation process of Eu3+/ZnO foam-like nanostructures is illuminated in this paper. The room temperature photoluminescence properties of the Eu3+/ZnO foam-like nanostructures were investigated. The sharp 4f-4f transition emissions of Eu3+ can be directly observed at 593, 617, and 698 nm. An energy transfer between ZnO and Eu3+ is shown to occur under UV excitation.
稀土离子掺杂的ZnO因其独特的光学性质以及在光电器件中的应用前景而成为众多研究的焦点。在此，我们展示了一种简便的电化学沉积路线，用于大规模可控制备Eu3+/ZnO纳米结构。通过扫描电子显微镜、能量色散光谱、X射线衍射、选区电子衍射和X射线光电子能谱对制备的Eu3+/ZnO沉积物进行了表征。本文讨论了Eu3+/ZnO纳米片和纳米棒的生长机制。阐述了Eu3+/ZnO泡沫状纳米结构的形成过程。研究了Eu3+/ZnO泡沫状纳米结构的室温光致发光性质。在593、617和698 nm处可直接观察到Eu3+尖锐的4f-4f跃迁发射。结果表明，在紫外激发下，ZnO和Eu3+之间发生了能量转移。
