Correlation between Molecular Packing and Surface Potential at Vanadyl Phthalocyanine/HOPG Interface
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AbstractWe report on the thickness-dependent morphology and surface potential of vanadyl phthalocyanine (VOPc) ultrathin films due to the variations between lying-down and tilted molecular packing configurations at the interface of VOPc film/highly ordered pyrolytic graphite (HOPG). Transition from a bilayer-thickness-dependent distribution to an orientation-dependent inhomogeneity of surface potential is observed in the same film. The surface potential change in the initial lying-down bilayers can be described by the abrupt junction model. In areas thicker than ca. 6 urn, a potential energy difference of about 100 meV between differently oriented VOPc molecular layers is found, indicating that the boundaries act as significant barriers for hole transport.
All Author(s) ListXie WG, Xu JB, An J, Xue K
Journal nameJournal of Physical Chemistry C
Volume Number114
Issue Number44
Pages19044 - 19047
LanguagesEnglish-United Kingdom
Web of Science Subject CategoriesChemistry; Chemistry, Physical; CHEMISTRY, PHYSICAL; Materials Science; Materials Science, Multidisciplinary; MATERIALS SCIENCE, MULTIDISCIPLINARY; Nanoscience & Nanotechnology; NANOSCIENCE & NANOTECHNOLOGY; Science & Technology - Other Topics

Last updated on 2020-24-11 at 23:58