DataVXAdvanced Materials InterfacesPaper
journal article·2017-03Open access

Unexpected Equilibrium Ionic Distribution in Cyanine/C60 Heterojunctions

Sandra Jenatsch, Jan Groenewold, Max Döbeli, Roland Hany, Rowena Crockett, Jörn Lübben, Frank Nüesch, Jakob Heier

Advanced Materials Interfaces· Volume 4· Issue 5
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Source abstract

Abstract

The equilibrium ionic distribution in cyanine donor–fullerene acceptor bilayer systems is investigated using Rutherford backscattering spectroscopy, elastic recoil detection analysis, and time‐of‐flight secondary ion mass spectroscopy. Simultaneously, the potential profile inside the C60 layer is followed by Kelvin probe force microscopy. Experimental verifications are obtained by using different device architectures, different mobile counter ions, and alternative acceptor layers. The unexpected constant iodide profile inside C60 and the potential shift close to the donor–acceptor interface can be explained by an exchange of electrons and ions from acceptor to donor and vice versa. The proposed model explaining all of the observed experimental findings is supported by a thermodynamic model.
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Research context

OpenAlex topics: Diamond and Carbon-based Materials Research · Fullerene Chemistry and Applications · Graphene research and applications

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Affiliations

Empa, Swiss Federal Institute for Materials Science and Technology Laboratory for Functional Polymers CH‐8600 Dübendorf Switzerland

Ecole Polytechnique Fédérale de Lausanne EPFL Institut des Matériaux Station 12 CH‐1015 Lausanne Switzerland

Electronic Paper Display Institute South China Normal University Higher Education Mega Center Guangzhou 510006 P. R. China

Van t‘Hoff Laboratory for Physical and Colloid Chemistry Debye Research Institute Utrecht University Padualaan 8 3584 CH Utrecht The Netherlands

Ion Beam Physics ETH Zürich Otto‐Stern‐Weg 5 CH‐8093 Zürich Switzerland

Empa Swiss Federal Institute for Materials Science and Technology Nanoscale Materials Science CH‐8600 Dübendorf Switzerland

Empa Swiss Federal Institute for Materials Science and Technology Laboratory for Joining Technologies and Corrosion CH‐8600 Dübendorf Switzerland

Material and Process Engineering Albstadt‐Sigmaringen University Albstadt DE‐72458 Germany

Funding

Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

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