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
Artikel, Zweitveröffentlichung, Verlagsversion
Kurzbeschreibung (Abstract)
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.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Kashiwaya, Shun ; Morasch, Jan ; Streibel, Verena ; Toupance, Thierry ; Jaegermann, Wolfram ; Klein, Andreas |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | The Work Function of TiO₂ |
| Sprache: | Englisch |
| Publikationsjahr: | 2021 |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Surfaces |
| Jahrgang/Volume einer Zeitschrift: | 1 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.26083/tuprints-00019796 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/19796 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichungsservice |
| Kurzbeschreibung (Abstract): | 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: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-197962 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung |
| Hinterlegungsdatum: | 29 Okt 2021 12:24 |
| Letzte Änderung: | 01 Nov 2021 07:17 |
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