Dresden 2006 – scientific programme

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CPP: Chemische Physik und Polymerphysik

CPP 23: POSTER Functional Organic Thin Films

CPP 23.47: Poster

Thursday, March 30, 2006, 17:00–19:00, P2

Investigation of excited states in P3HT and P3HT/PCBM composites — •Moritz Liedtke, Johannes Sieger, Carsten Deibel, and Vladimir Dyakonov — Experimental Physics VI, Physical Institute, University of Würzburg, 97074 Würzburg, Germany

Polymere-Fullerene composites exhibit efficient charge carrier generation due to ultrafast electron transfer which can be exploited for photovoltaic applications. Power efficiencies up to 5% have been achieved with bulk heterojunction solar cells fabricated from Poly(3-hexylthiophene) (P3HT) / [6,6] phenyl-C61-butyric acid methyl ester (PCBM) (1). In our work we studied excited states in regio-regular and regio-random P3HT by optical spectroscopy techniques like photoluminescence and photoinduced absorption (PIA) measurements. We discuss our results with respect to the morphology of the P3HT and P3HT / PCBM blend films. (1) Appl Phys Lett 87, 083506, 2005, Marisol Reyes-Reyes, Kyungkon Kim, and David L. Carroll