Surface potentials of magnetron sputtered transparent conducting oxides

A. Klein, C. Körber, A. Wachau, F. Säuberlich, Y. Gassenbauer, R. Schafranek, S. P. Harvey, Thomas O Mason

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106 Citations (Scopus)

Abstract

Work functions, ionization potentials (electron affinities) and Fermi level positions measured in-situ by photoelectron spectroscopy at surfaces of transparent conducting oxides are presented. Thin films of ZnO, ZnO:Al, SnO2, SnO2:Sb, In2O3, In2O3:Sn, and In2O3:(Zn,Sn) are prepared by magnetron sputtering. The Fermi level position is strongly affected by the oxygen content in the sputter gas. The ionization potential and work function of ZnO are strongly affected by surface orientation. In contrast, SnO2-based and In2O3-based materials show pronounced changes of ionization potential and work function induced by surface oxidation and reduction. Unlike SnO2, the oxidation of the In2O3-based TCO surfaces does not occur during deposition but can be induced by post-deposition treatments.

Original languageEnglish
Pages (from-to)1197-1203
Number of pages7
JournalThin Solid Films
Volume518
Issue number4
DOIs
Publication statusPublished - Dec 15 2009

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Keywords

  • InO
  • Magnetron sputtering
  • Photoemission
  • SnO
  • TCO
  • Thin film
  • Work function
  • ZnO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Klein, A., Körber, C., Wachau, A., Säuberlich, F., Gassenbauer, Y., Schafranek, R., ... Mason, T. O. (2009). Surface potentials of magnetron sputtered transparent conducting oxides. Thin Solid Films, 518(4), 1197-1203. https://doi.org/10.1016/j.tsf.2009.05.057