Berlin 2012 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 44: Poster IV: Thin film photovoltaics; Organic electronics and photovoltaics (jointly with CPP, HL, O); Organic thin films; Trends in atomic layer deposition (Focused session)

DS 44.14: Poster

Freitag, 30. März 2012, 09:30–12:00, Poster E

Use of PEDOT:PSS as Gate Electrode on a PMMA Gate Dielectric in Transparent Organic Field Effect Transistors — •Steffen Heuser, Jan Hartel, Christopher Keil, and Derck Schlettwein — Justus-Liebig-Universität Gießen, Institut für Angewandte Physik, Heinrich-Buff-Ring 16, D-35392 Gießen

Indium tin oxide (ITO) on glass was patterned to provide a transparent interdigitated source-drain electrode array. As an organic semiconductor, semitransparent 40 nm pentacene were prepared by physical vapor deposition (PVD) under fine vacuum conditions. As gate dielectric, a thin transparent polymer layer (500 nm) of PMMA (poly(methyl methacrylate)) was deposited by spin-coating on top of the pentacene layer. Finally, a layer of PEDOT:PSS was prepared by spin-coating and used as gate-electrode. The transistor structures were measured and as the characteristic properties the threshold voltage and the on/off ratio of the structures will be discussed.