Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 73: [DS] Organic Electronics and Photovoltaics III (jointly with CPP, HL, and O)
O 73.2: Vortrag
Donnerstag, 17. März 2011, 14:15–14:30, GER 38
Local analysis on organic field effect transistors — •Harald Graaf1, Franziska Lüttich1, Daniel Lehmann2, Dietrich R.T. Zahn2, and Christian von Borczyskowski1 — 1Optische Spektroskopie und Molekülphysik, Institut für Physik, Technische Universität Chemnitz, 09107 Chemnitz — 2Halbleiterphysik, Institut für Physik, Technische Universität Chemnitz, 09107 Chemnitz
Within the last decade the interest on organic electronics increased tremendously and reaches even industrial applications. Nevertheless, there are still a lot of open questions concerning e.g. the charge transport in the organic materials especially on a local scale. Here the focus is on the influence of trap states at interfaces and within the bulk provided e.g. by grain boundaries. By the combination of diverse measurement techniques a deeper insight and a better understanding of the local properties of the materials can be obtained.
We will present recent results on organic materials gained by electrical DC-measurements, Kelvin probe force microscopy on operating devices, optical and topographical investigations. By the results one obtain on the one hand information about the orientation and the coupling of the chromophoric systems (which is responsible also for the charge transport) within the film. On the other hand the electrical and electronical characterizations permit insight in the properties especially at the relevant interfaces (electrode/semiconductor and semiconductor/isolator) and on the local transport characteristics of the charges.