Formation and luminescence of ZnO nanoparticles embedded in MgO films

J. G. Ma, Y. C. Liu, C. L. Shao, J. Y. Zhang, Y. M. Lu, D. Z. Shen, and X. W. Fan
Phys. Rev. B 71, 125430 – Published 30 March 2005

Abstract

ZnO nanoparticles embedded in MgO thin films were prepared by a simple coevaporation method, and the subsequent thermal annealing in oxygen ambient at 3001100°C. X-ray diffraction and optical absorption spectra revealed that the size of ZnO nanoparticles embedded in MgO decreased with increasing annealing temperature, and MgZnO interlayers were formed between ZnO nanoparticles and MgO matrix. Analysis of Raman scattering spectra showed that the strain originated from lattice mismatch between ZnO and MgO was relaxed by annealing processes, and the MgZnO alloy layers between ZnO nanoparticles and MgO matrix were formed. In photoluminescence spectra, the exciton emissions of ZnO nanoparticles shift to shorter wavelengths with increasing annealing temperature. When the annealing temperatures exceeded 700°C, a strong emission appeared at 3.58eV, while the deep level emission band in the visible light region was dramatically quenched.

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  • Received 9 August 2004

DOI:https://doi.org/10.1103/PhysRevB.71.125430

©2005 American Physical Society

Authors & Affiliations

J. G. Ma

  • Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 16 East-south Lake Avenue, Changchun 130033, China

Y. C. Liu* and C. L. Shao

  • Center for Advanced Optoelectronic Functional Material Research, Northeast Normal University, Changchun 130024, China

J. Y. Zhang, Y. M. Lu, D. Z. Shen, and X. W. Fan

  • Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 16 East-south Lake Avenue, Changchun 130033, China

  • *Email address: ycliu@nenu.edu.cn

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Issue

Vol. 71, Iss. 12 — 15 March 2005

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