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Physical structure and optical properties of Co-doped ZnO nanoparticles prepared by co-precipitation

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Abstract

The structural and optical properties of cobalt-doped zinc oxide (Co-doped ZnO) nanoparticles have been investigated. The nanopowder with Co concentrations up to 5 at% was synthesized by a co-precipitation method. The physical structure and the chemical states of the Co-doped ZnO were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, UV–Visible reflectance and cathodoluminescence (CL) spectroscopy. The results show that cobalt ions predominantly occupy Zn2+ sites in the wurtzite crystal lattice and possess a valence state of 2+. CL analysis revealed that the incorporation of Co2+ creates a new emission band at 1.85 eV, but quenched the near-band-edge luminescence.

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Acknowledgments

The authors acknowledge the facilities, and the scientific and technical assistance of the Electron Microscope Facility, Deakin University.

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Authors and Affiliations

  1. Institute for Technology Research and Innovation, Geelong Technology Precinct, Deakin University, Geelong, VIC, 3217, Australia

    Rongliang He, Bin Tang & Takuya Tsuzuki

  2. School of Physics and Advanced Materials, University of Technology Sydney, PO Box 123, Sydney, NSW, 2007, Australia

    Cuong Ton-That & Matthew Phillips

  3. Research School of Engineering, College of Engineering and Computer Science, Australian National University, Building 31, North Road, Canberra, ACT, 0200, Australia

    Takuya Tsuzuki

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  1. Rongliang He
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  2. Bin Tang
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  3. Cuong Ton-That
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Correspondence to Takuya Tsuzuki.

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He, R., Tang, B., Ton-That, C. et al. Physical structure and optical properties of Co-doped ZnO nanoparticles prepared by co-precipitation. J Nanopart Res 15, 2030 (2013). https://doi.org/10.1007/s11051-013-2030-6

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