Regensburg 2013 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 32: Poster: Organic Semiconductors

CPP 32.1: Poster

Mittwoch, 13. März 2013, 16:30–18:30, Poster C

Organic Magnetooptoelectronics: Magnetoresistive Organic Field-Effect Transistors — •Thomas Reichert, Carolin Isenberg, Tobat Saragi, and Josef Salbeck — Macromolecular Chemistry and Molecular Materials (mmCmm), Department of Mathematics and Science and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Strasse 40, 34132, Kassel, Germany.

In organic semiconductors the spin-correlation between quasiparticles can be influenced by low magnetic fields, which leads to large (up to 20% at 10mT) magnetoresistance at room temperature. This organic magnetoresistance (OMAR) is not only highly interesting for addressing fundamental questions about spin-transport and spin-manipulation in organic materials, but also for the realization of lightweight, flexible, multifunctional magnetooptoelectronic applications. We were able to develop different types of magnetoresistive organic field-effect transistors (OFETs) and present an overview about the corresponding magnetic-field dependent effects (Photoinduced magnetoresistance; Magnetoresistance based on donor/acceptor blends; Photoinduced sign change of magnetoresistance) as well as the underlying fundamental physical processes. These results do not only pave the way for the application of organic semiconductors in future multifunctional magnetooptoelectronic devices but also help to identify the details of spin-dependent processes in organic semiconductors.