Berlin 2012 – scientific programme

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DS: Fachverband Dünne Schichten

DS 7: Organic electronics and photovoltaics I (jointly with CPP, HL, O)

DS 7.4: Talk

Monday, March 26, 2012, 16:00–16:15, H 2032

Organic Field Effect Transistor Studies on Contact Phenomena and Charge Carrier Injection in Bottom Contact Devices — •Christopher Keil, Dominik Klaus, and Derck Schlettwein — Justus-Liebig-Universität Gießen, Institut für Angewandte Physik, Heinrich-Buff-Ring 16, D-35392, Gießen.

Thin films of the perfluorinated phthalocyanine F₁₆PcCu were prepared under high vacuum conditions. As substrate a SiO₂ insulating layer on a Si gate was chosen. Different metal contacts were evaporated as bottom contacts before the organic layer deposition. Organic thin film transistors of the molecular semiconductors were thereby achieved. The electrical contact behaviour of the organic semiconductor to electrodes of different metals (Au, Ag, Al) was investigated. The contact characteristics and the formation of an injection barrier will be discussed. Modelling of transistor characteristics and charge carrier injection are shown and their influence on the calculation of the intrinsic charge carrier mobility in the semiconductor channel is shown.