Berlin 2012 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 6: Poster: Structural Ordering and Electronic Transport (joint focus with HL)

CPP 6.10: Poster

Monday, March 26, 2012, 17:30–19:30, Poster A

Time resolved microwave conductivity (TRMC) and transient absoption (TAS) measurements reveal charge carrier dynamics in organic semiconductors — •Andreas Fritze¹, Andreas Sperlich¹, Carsten Deibel¹, Tom J. Savenije³, and Vladimir Dyakonov^1,2 — ¹Experimental Physics VI, Julius Maximilian 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 self arranged organic semiconductors is essential to improve material properties and processing parameters and, at long sight, device performance. We performed combined TRMC and TAS measurements on organic semiconductors to gain direct access to the microscopic transport properties and charge carrier densities, respectively comparing both data yields us a complete picture about the generation, transport and recombination of charges on a microscopic length-scale. After laser pulse excitation TRMC and TAS signal decay in the blend of PCPDTBT:PCBM with varying PCBM content have been observed at different temperatures. This polymer:fullerene blend is a promising candidate for new high efficiency organic photovoltaic devices. We discuss the influence of morphology on light induced charge carrier density, recombination and mobility on a microscopic scale.