Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 19: Clean surfaces I
O 19.3: Vortrag
Montag, 26. März 2012, 18:00–18:15, A 053
Bulk and Surface Characterization of In2O3(001) Single Crystals — •Daniel Hagleitner1, Manfred Menhart1, Peter Jacobson1, Sara Blomberg2, Karina Schulte2, Edvin Lundgren2, Frank Kubel3, Christoph Puls3, Andreas Limbeck3, Herbert Hutter3, Lynn Boatner4, Michael Schmid1, and Ulrike Diebold1 — 1Institute of Applied Physics, TU Wien, Austria — 2Division of Synchrotron Radiation Research, Lund University, Sweden — 3Institute of Chemical Technologies and Analytics, TU Wien, Austria — 4Materials Science and Technology Division, Oak Ridge National Laboratory, USA
Indium oxide, In2O3, has drawn increased attention from researchers over recent years. When doped with SnO2, the material is commonly referred to as Indium Tin Oxide (ITO), which is the prototypical Transparent Conducting Oxide (TCO). ITO combines high optical transparency in the visible range with a conductivity approaching that of a metal. Despite the technological importance of ITO, surprisingly little is known about its surface properties or those of pure indium oxide. We will present STM, STS, PES, LEIS and XRD results of high-quality single crystals grown by the flux method. In particular, we will discuss atomically-resolved STM images of the In2O3(001) single crystal surface depending on the surface preparation (reduced/oxidized/hydrogenated) conditions. PES and STS data show a significant difference of the electronic structure (surface states, band bending) depending on the surface preparation.