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The Work Function of TiO₂

Kashiwaya, Shun ; Morasch, Jan ; Streibel, Verena ; Toupance, Thierry ; Jaegermann, Wolfram ; Klein, Andreas (2021)
The Work Function of TiO₂.
In: Surfaces, 1 (1)
doi: 10.26083/tuprints-00019796
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: The Work Function of TiO₂
Language: English
Date: 2021
Place of Publication: Darmstadt
Publisher: MDPI
Journal or Publication Title: Surfaces
Volume of the journal: 1
Issue Number: 1
DOI: 10.26083/tuprints-00019796
Corresponding Links:
Origin: Secondary publication service

Polycrystalline anatase thin films, (001)- and (101)-oriented anatase TiO₂ single crystals and (001)- and (110)-oriented rutile TiO₂ single crystals with various surface treatments were studied by photoelectron spectroscopy to obtain their surface potentials. Regardless of orientations and polymorph, a huge variation of the Fermi level and work function was achieved by varying the surface condition. The most strongly oxidized surfaces are obtained after oxygen plasma treatment with a Fermi level ∼2.6 eV above the valence band maximum and ionization potentials of up to 9.5 eV (work function 7.9 eV). All other treated anatase surfaces exhibit an ionization potential independent of surface condition of 7.96±0.15 eV. The Fermi level positions and the work functions vary by up to 1 eV. The ionization potential of rutile is ∼0.56 eV lower than that of anatase in good agreement with recent band alignment studies.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-197962
Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Surface Science
Date Deposited: 29 Oct 2021 12:24
Last Modified: 14 Aug 2023 09:49
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/19796
PPN: 495611522
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