Regensburg 2007 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 13: Poster 1

HL 13.77: Poster

Monday, March 26, 2007, 15:00–17:30, Poster A

Open circuit voltage of organic solar cells - experiment and simulation — •Matthias Roosz¹, Carsten Deibel¹, Ingo Riedel², Vladimir Dyakonov^1,2, David Cheyns³, Jan Genoe³, and Paul Heremans³ — ¹Experimental Physics VI, Physical Institute, Julius-Maximilians-University of Würzburg, Am Hubland, D-97074 Würzburg, Germany — ²Div. Functional Materials for Energy Technology, ZAE Bayern e.V., Am Hubland, D-97074 Würzburg, Germany — ³IMEC, Polymer & Molecular Electronics, Kapeldreef 75, B-3001 Leuven, Belgium

Polymer photovoltaic devices are promising alternatives to inorganic solar cells due to their low-cost fabrication of large areas. However, as the power conversion efficiency of organic solar cells needs to be further increased, investigations of the basic principles are indispensible.

The open-circuit voltage as a key parameter of organic solar cells is studied by both simulation and device characterization. We present an analytic model for bilayer devices employing Poisson-equation and the balance between drift/diffusion-current which is compared to bilayer polymer-fullerene solar cells. Light intensity and temperature dependance will be discussed.