Work function of fluorine doped tin oxide

M. G. Helander, M. T. Greiner, Z. B. Wang, Wing Man Tang, Z. H. Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

167 Citations (Scopus)


Fluorine doped tin oxide (FTO) is a commonly used transparent conducting oxide in optoelectronic device applications. The work function of FTO is commonly cited as 4.4 eV, which is incommensurate with recent device performance results. Using x-ray photoelectron spectroscopy, the authors measured the work function of commercial FTO to be 5.0±0.1 eV. UV ozone treatment was found to increase the work function by ∼0.1 eV due to surface band bending. The origins of the much lower work function previously reported are also discussed and are found to be a result of carbon contamination and UV induced work function lowering.
Original languageEnglish
Article number011019
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Issue number1
Publication statusPublished - 1 Jan 2011
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films


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