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DS: Fachverband Dünne Schichten

DS 40: Organic Electronics and Photovoltaics HL-II (jointly with CPP, HL, and O)

DS 40.7: Talk

Wednesday, March 16, 2011, 12:00–12:15, FOE Anorg

Quantitative Description of Electroluminescence Images of Polymer Solar Cells — •Marco Seeland, Roland Rösch, and Harald Hoppe — Institute of Physics, Ilmenau University of Technology, Ilmenau, Germany

We present a quantitative description of electroluminescence images obtained on organic solar cells, which is based on a device modeling employing a network of interconnected microdiodes. The equivalent circuit network model takes interface and bulk resistances as well as the sheet resistance of the transparent electrode into account. The application of this model allows direct calculation of the lateral current and voltage distribution as well as determination of internal resistances and the sheet resistance of the higher resistive electrode. Furthermore, we have extended the microdiode-model to also describe and predict current voltage characteristics for devices under illumation. Finally the local nature of this description enables important conclusions concerning the geometry dependent performance of thin film solar cells.