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Interfacial electronic properties of pentacene tuned by a molecular monolayer of C-60
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, The Institute of Technology.
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2009 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 80, no 11, 115401-1-115401-7 p.Article in journal (Refereed) Published
Abstract [en]

Fine-tuning charge injection barriers between organic materials and electrodes is critical to optimize organic electronic device performance. Here we demonstrate that by modifying gold substrates with a monolayer of fullerene, significant decrease in the hole-injection barrier into pentacene films can be achieved. The insertion of the fullerene monolayer modifies the interfacial dipole and produces an interface where the pentacene molecules form a standing-up orientation with their long axis parallel to the surface normal. The latter effect lowers the vertical ionization energy of the pentacene molecules at the interface as compared to the pentacene-on-Au case, as well as improves the pi-pi overlap between the pentacene molecules that will likely enhance the transport properties in corresponding devices.

Place, publisher, year, edition, pages
College Park, MD, United States: American Physical Society , 2009. Vol. 80, no 11, 115401-1-115401-7 p.
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Natural Sciences
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URN: urn:nbn:se:liu:diva-51266DOI: 10.1103/PhysRevB.80.115401ISI: 000270383200113OAI: oai:DiVA.org:liu-51266DiVA: diva2:273906
Available from: 2009-10-26 Created: 2009-10-26 Last updated: 2014-03-27Bibliographically approved

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Liu, XianjieZhan, YiqiangBraun, SlawomirLi, FenghongFahlman, Mats

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