Journal
APPLIED PHYSICS LETTERS
Volume 101, Issue 13, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4755763
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The growth, crystal and electronic structures, and photo-electrochemical properties of undoped and Ti doped hematite epitaxial films were studied. We evidence that Ti4+ substitutes Fe3+ in the hematite lattice inducing a slight modification of the oxygen octahedron. Ti doping is shown to induce a shift of the valence band toward higher binding energy due to a movement of the Fermi level toward the conduction band. The resulting modification of electrical conductivity appears as a possible origin of the improvement of photo-electrochemical properties in the doped sample. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4755763]
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