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

Publisher:
Springer
Publication Type:
Journal article
Citation:
He, Rongliang et al. 2013, 'Physical structure and optical properties of Co-doped ZnO nanoparticles prepared by co-precipitation', Journal of nanoparticle Research, vol. 15, no. 1, pp. 2030-1-2030-8.
Issue Date:
2013
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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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