Berlin 2012 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 7: Organic electronics and photovoltaics I (jointly with CPP, HL, O)
DS 7.1: Hauptvortrag
Montag, 26. März 2012, 15:00–15:30, H 2032
Three-dimensional hybrid organic/inorganic heterojunctions based on rolled-up nanomembranes — •Carlos Cesar Bof Bufon1, Dominic J. Thurmer1, Christoph Deneke1, and Oliver G. Schmidt1,2 — 1Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany — 2Material Systems for Nanoelectronics, Chemnitz University of Technology, Reichenhainerstrasse 70, 09107 Chemnitz, Germany
In this work we present a method based on self-released strained nanomembranes (metallic and/or semiconducting) for electrically contact single molecular layers [1]. During release of the nanomembrane, the strain relaxation gives rise to a self-rolling process in which the membrane bonds back to substrate top surface where the thin organic layer was previously deposited. By this means, we are able to fabricate semiconductor-molecule-semiconductor heterojunctions. In this last case, the type of doping and its concentration can be independently and precisely set for each electrode in order to tune the device electronic properties. Such a novel hybrid devices was observed to display completely different electric characteristics which are not expected or possible to be demonstrated by using their elements separately. In addition, the strained nanomembrane based electrodes provide a soft and robust contact on top of the organic film. Furthermore, applying the self-rolling phenomenon, we achieve an approach that is fully integrative on a chip, and several components can be fabricated in parallel using well-established semiconductor processing technologies. [1] Bufon,C.C.B., Nano Lett.11,3727(2011)