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Customized electronic coupling in self-assembled donor-acceptor nanostructures

AutorOteyza, D. G. de ; García-Lastra, J. M.; Corso, M.; Doyle, Bryan P.; Floreano, Luca; Morgante, Alberto; Wakayama, Yutaka; Rubio, Angel; Ortega, J. Enrique
Palabras claveDensity functional calculations
Self-assembly
Supramolecular chemistry
X-ray spectroscopy
Electronic structure
Fecha de publicación2009
EditorWiley-VCH
CitaciónAdvanced Functional Materials 19(22): 3567-3573 (2009)
ResumenCharge 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 iuorinated copperphthalocyanines (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 © 2009 WILEY-VCH Verlag GmbH & Co. KGaA.
URIhttp://hdl.handle.net/10261/95906
DOI10.1002/adfm.200901374
Identificadoresdoi: 10.1002/adfm.200901374
issn: 1616-301X
e-issn: 1616-3028
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