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Dresden 2011 – scientific programme

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DS: Fachverband Dünne Schichten

DS 13: Organic Electronics and Photovoltaics CPP-I (jointly with CPP, HL, and O)

DS 13.12: Talk

Monday, March 14, 2011, 17:15–17:30, ZEU 222

Time resolved microwave conductivity reveals charge carrier dynamics in organic semiconductors — •Johannes Erben1, Andreas Sperlich1, Hannes Kraus1, Tom J. Savenije1,3, Carsten Deibel1, and Vladimir Dyakonov1,21Experimental Physics VI, Julius-Maximilians-University of Würzburg, D-97074 Würzburg — 2ZAE Bayern, D-97074 Würzburg — 3Department of Chemical Engineering, Delft University of Technology, NL-2628 BL Delft, The Netherlands

Understanding of the light induced charge carrier dynamics in organic semiconductors is essential to improve material properties and processing parameters, and, at long sight, device performance. Time Resolved Microwave Conductivity (TRMC) gives direct access to the microscopic transport properties, as the high frequency alternating electric field limits the drift of the charge carriers. After laser pulse excitation TRMC signal decays in P3HT:PCBM blends with varying PCBM content have been observed exhibiting a power law time dependence. The influence of morphology and temperature on the charge carrier recombination and mobility on a microscopic scale can thus be investigated.

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