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Customized Electronic Coupling in Self-Assembled Donor–Acceptor Nanostructures

Authors

  • Dimas G. de Oteyza,

    Corresponding author
    1. Donostia International Physics Center Paseo Manuel Lardizabal 4, 20018 San Sebastián (Spain)
    2. Advanced Electronic Materials Center National Institute for Materials Science 1-1 Namiki, Tsukuba 305-0044 (Japan)
    • Donostia International Physics Center Paseo Manuel Lardizabal 4, 20018 San Sebastián (Spain).
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  • Juan M. García-Lastra,

    1. Nano-Bio Spectroscopy group and European Theoretical Spectroscopy Facility (ETSF) Departamento Fisica de Materiales UPV/EHU Apdo. 1072, San Sebastián (Spain)
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  • Martina Corso,

    1. Donostia International Physics Center Paseo Manuel Lardizabal 4, 20018 San Sebastián (Spain)
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  • Bryan P. Doyle,

    1. Laboratorio Nazionale TASC INFM-CNR National Area Science Park, I-34012 Basovizza, Trieste (Italy)
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  • Luca Floreano,

    1. Laboratorio Nazionale TASC INFM-CNR National Area Science Park, I-34012 Basovizza, Trieste (Italy)
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  • Alberto Morgante,

    1. Laboratorio Nazionale TASC INFM-CNR National Area Science Park, I-34012 Basovizza, Trieste (Italy)
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  • Yutaka Wakayama,

    1. Advanced Electronic Materials Center National Institute for Materials Science 1-1 Namiki, Tsukuba 305-0044 (Japan)
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  • Angel Rubio,

    1. Nano-Bio Spectroscopy group and European Theoretical Spectroscopy Facility (ETSF) Departamento Fisica de Materiales UPV/EHU Apdo. 1072, San Sebastián (Spain)
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  • J. Enrique Ortega

    1. Donostia International Physics Center Paseo Manuel Lardizabal 4, 20018 San Sebastián (Spain)
    2. Centro de Fisica de Materiales Materials Physics Center, CSIC-UPV/EHU Paseo Manuel Lardizabal 3, 20018 San Sebastián (Spain)
    3. Departamento de Fisica Aplicada, UPV/EHU Plaza de Oñate 2, 20018 San Sebastián (Spain)
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Abstract

Charge transfer processes between donor–acceptor complexes and metallic electrodes are at the heart of novel organic optoelectronic devices such as solar cells. Here, a combined approach of surface-sensitive microscopy, synchrotron radiation spectroscopy, and state-of-the-art ab initio calculations is used to demonstrate the delicate balance that exists between intermolecular and molecule–substrate interactions, hybridization, and charge transfer in model donor–acceptor assemblies at metal-organic interfaces. It is shown that charge transfer and chemical properties of interfaces based on single component layers cannot be naively extrapolated to binary donor–acceptor assemblies. In particular, studying the self-assembly of supramolecular nanostructures on Cu(111), composed of fluorinated copper-phthalocyanines (F16CuPc) and diindenoperylene (DIP), it is found that, in reference to the associated single component layers, the donor (DIP) decouples electronically from the metal surface, while the acceptor (F16CuPc) suffers strong hybridization with the substrate.

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