Regensburg 2010 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 62: Poster II: Photovoltaics and Organic Semiconductors

HL 62.1: Poster

Donnerstag, 25. März 2010, 18:00–20:00, Poster D2

Charge transport in organic semiconductors — •Vera Stehr¹, Carsten Deibel¹, Vladimir Dyakonov¹, Johannes Pfister², and Reinhold Fink² — ¹Experimentalphysik 6, Institut für Physik und Astronomie, Universität Würzburg — ²theoretische organische Chemie, Institut für organische Chemie, Universität Würzburg

We have analysed the mobility and the diffusion of charge carriers in organic semiconductors by means of a Monte Carlo simulation and the master equation approach. In disordered amorphous materials, deviations from the Einstein relation, which states that the ratio of the diffusion constant to the mobility equals the thermal voltage, are found. The impact of our findings on experimental charge transport measurements will be discussed. We furthermore determined the anisotropy of the mobility in organic crystals by means of quantum chemical calculations and the Marcus theory for charge carrier hopping.