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SYOE: Symposium Organic Thin Film Electronics: From Molecular Contacts to Devices

SYOE 5: Organic Devices

SYOE 5.4: Vortrag

Dienstag, 27. März 2007, 12:30–12:45, H1

Current injection and contacts to Cu(TCNQ) — •Artur Hefczyc, Lars Beckmann, Eike Becker, Hans-Hermann Johannes, and Wolfgang Kowalsky — Institut für Hochfrequenztechnik, Technische Universität Braunschweig, Braunschweig, Germany

The development of organic electronics has caused increasing interest in non-volatile organic memories. Although many groups have reported memory effects in a wide range of material systems, the details of the switching mechanism are still not known. We have investigated the influence of contacts in devices based on the Cu(TCNQ) charge transfer complex by using combinations of different metals as well as metals and oxides. Our results show that the configuration of the contacts as well as the details of current injection have a crucial influence on device properties, e.g. on the polarity of the voltages required for switching. We report on the experimental results and the conclusions that can be drawn for the physics of the switching mechanism.