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 4.14: Poster

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

Surface effects on organic solar cell characteristics — •Alexander Wagenpfahl, Carsten Deibel, and Vladimir Dyakonov — Experimental Physics VI, Julius-Maximilians-University of Würzburg, Am Hubland, D-97074 Würzburg

For an economic competition with other energy sources, the power conversion efficiency of polymer:fullerene solar cells has to be increased. Limiting factors on this efficiency are diverse and range from influence of the charge carrier mobility, gaussian disorder of energies to recombination effects of charges and excited states. Surface effects, however, have been mostly neglected so far. Using a numerical device simulation, we examine the influence of the surface recombination on the solar cell characteristics. Under consideration of different models, such as the well known injection model of Scott and Malliaras (Chem. Phys. Lett. 299 (1999) 115), we discuss the relevance of surface recombination for bulk heterojunction photovoltaic devices.