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Journal of Materials Science

, Volume 29, Issue 6, pp 1497–1500 | Cite as

Morphology of polycrystalline ZnO and its physical properties

  • L. Koudelka
  • J. Horák
  • P. Jariabka
Papers

Abstract

Five commercial polycrystalline ZnO samples with different morphologies (nodular and needle-like) have been studied. Nodular ZnO crystallites reveal lower polydispersity, higher ultraviolet luminescence (380 nm), low green luminescence (500 nm), a small ESR signal with g=1.96 and a density close to the theoretical value for ZnO with the wurtzite structure. Needle-like ZnO crystallites have a higher polydispersity, higher green luminescence, higher ESR signal with g=1.96 and lower values of density. The observed differences in the physical properties are associated with the presence of oxygen vacancies in needle-like particles and probably also interstitial zinc atoms in nodular particles.

Keywords

Wurtzite Zinc Atom Green Luminescence Lower Polydispersity Interstitial Zinc 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • L. Koudelka
    • 1
  • J. Horák
    • 1
  • P. Jariabka
    • 2
  1. 1.University of Chemical TechnologyPardubiceCzech Republic
  2. 2.SlovlakKošecaSlovakia

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