Dresden 2009 – scientific programme

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SYOP: Symposium Organic Photovoltaics: From Single Molecules to Devices

SYOP 4: Organic Photovoltaics: from Single Molecules to Devices

SYOP 4.34: Poster

Thursday, March 26, 2009, 16:30–19:00, P1A

Transient photovoltage and photocurrent of polymer:fullerene solar cells — •Alexander Förtig¹, Daniel Rauh¹, Carsten Deibel², and Vladimir Dyakonov^1,2 — ¹Bavarian Centre for Applied Energy Research e.V. (ZAE Bayern), D-97074 Würzburg — ²Julius-Maximilians-University of Würzburg, Institute of Physics, Experimental Physics VI, D-97074 Würzburg

Improvements in the performance of organic solar cells based on polymer:fullerene blends are strongly dependent on understanding dominant loss processes within these devices, such as bimolecular recombination. Especially measurements under working conditions of the solar cell are attracting legitimate interest. Therefore, we used transient photovoltage and transient photocurrent measurements in order to determine the charge carrier lifetime and density of poly(3-hexylthiophene):[6,6]-phenyl-C₆₁ butyric acid methyl ester solar cells. Transients were performed over a wide range of light intensities. The experimental results are discussed with respect to recent findings concerning the order of the charge carrier decay rate in organic solar cells.