Table of Contents
Journal of Photonics
Volume 2014 (2014), Article ID 684601, 5 pages
http://dx.doi.org/10.1155/2014/684601
Research Article

Wet Chemical Preparation of Nanoparticles ZnO:Eu3+ and ZnO:Tb3+ with Enhanced Photoluminescence

1Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
2Duy Tan University, 182 Nguyen Van Linh, Da Nang, Vietnam
3Advanced Institute of Science and Technology, HUT, 1 Dai Co Viet, Hanoi, Vietnam
4Department of Physics, Quy Nhon University, Vietnam

Received 30 October 2013; Revised 9 March 2014; Accepted 20 March 2014; Published 17 April 2014

Academic Editor: Patrick Kung

Copyright © 2014 Tran Kim Anh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

ZnO doped with Eu3+ and Tb3+ had been successfully prepared by wet chemical method with the assistance of microwave. The influence of reaction conditions such as temperature, time, content of Eu3+, Tb3+ ion, and annealing treatment on the structure and luminescent characteristics was studied. The analysis of energy dispersive spectroscopy (EDS) and photoluminescence spectra measurements indicated that Eu3+ and Tb3+ exist in host lattice and create the new emission region compared to ZnO crystalline host lattice. The field emission scanning electron microscope (FE-SEM) studies show the Eu3+, Tb3+ doped ZnO nanoparticles have a pseudohexagonal shape. The particle size was 30–50 nm for ZnO:Eu3+ and 40–60 nm for ZnO:Tb3+. Photoluminescence excitation (PLE) and photoluminescence (PL) spectra at room temperature have been studied to recognize active centers for characteristic luminescence of ZnO:Eu3+ and ZnO:Tb3+. The characteristic luminescent lines of Eu3+ (5D0-7Fj) and Tb3+ (5D4-7Fj) were determined. It has been demonstrated that the wet chemical synthesis method with microwave assistance can strongly enhance the luminescent intensity of nanoparticles ZnO:Eu3+ in red and ZnO:Tb3+ in green.