Dresden 2011 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 45: Joint Poster Session

HL 45.8: Poster

Tuesday, March 15, 2011, 18:00–21:00, P1

Temperature dependent studies of the recombination process in organic bilayer solar cells — •Thiemo Gerbich¹, Alexander Foertig¹, David Cheyns², Paul Heremans², Carsten Deibel¹, and Vladimir Dyakonov^1,3 — ¹Experimental Physics VI, Physical Institute, Julius-Maximilians-University of Würzburg, Am Hubland, D-97074 Würzburg — ²IMEC v.z.w., Kapeldreef 75, 3001 Leuven, Belgium — ³Bavarian Centre for Applied Energy Research (ZAE Bayern e.V.), Am Hubland, D-97074 Würzburg, Germany

In spite of organic solar cells having reached more than 8 % power conversion efficiencies recently, fundamental processes such as the recombination dynamics are still not fully understood. Therefore we investigated evaporated copper phthalocyanine (CuPC):C60 bilayer devices with a well defined donor-acceptor interface. The technique of Transient Photovoltage (TPV) and Photocurrent (TPC) was used to study the recombination dynamics in dependence of temperature and active layer thickness. We found recombination orders higher than two, and discuss the relevant fundamental contributions of internal processes.