Barrier formation at organic interfaces in a Cu(100)-benzenethiolate-pentacene heterostructure

M.G. Betti, A. Kanjilal, C. Mariani, Héctor Vázquez, Y.J. Dappe, J. Ortega, F. Flores

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    Abstract

    The energy level alignment at the metal-organic and organic-organic interfaces of the Cu(100)/benzenethiolate/pentacene heterostructure is studied by photoemission spectroscopy and discussed theoretically using a model that includes, in a consistent way, charge transfer, Pauli repulsion, intrinsic molecular dipoles, and interface screening as a function of coverage. Despite the different nature of the two interfaces, our model provides a unified explanation for the work-function changes at both junctions and enables us to determine the benzenethiolate orientation as a function of coverage.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume100
    Issue number2
    Pages (from-to)027601
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2008

    Bibliographical note

    Copyright 2008 American Physical Society

    Keywords

    • METAL
    • DIPOLE
    • ELECTRONIC-STRUCTURE
    • PLANE
    • ENERGY-LEVEL ALIGNMENT
    • SURFACES
    • PENTACENE
    • SELF-ASSEMBLED MONOLAYER

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