Berlin 2012 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 24: Poster: Organic Semiconductors
CPP 24.5: Poster
Mittwoch, 28. März 2012, 11:00–13:00, Poster A
Impedance measurements on organic solar cells based on DIP and C60 — •Theresa Linderl, Stefan Grob, Julia Wagner, and Wolfgang Brütting — Institute of Physics, University of Augsburg, 86135 Augsburg, Germany
Impedance spectroscopy (IS) has turned out to be a powerful tool to study organic semiconductor devices by measuring differential resistances and capacitances. Recently, it was shown that a connection can be established between recombination and series resistances extracted from IS and current-voltage (j-V) curves of polymer solar cells [1]. IS bypasses the influence of the photocurrent, which is assumed to be constant and measures directly the recombination current, that in turn can be used to understand the shape of the j-Vcurve of a solar cell.
In this contribution we apply this method to describe organic solar cells based on diindenoperylene (DIP) and the fullerene C60. By comparing results of IS measurements of planar- and bulk-heterojunction solar cells we investigate the effect of charge carrier recombination on organic solar cell performance.
[1] P. P. Boix et al., Adv. Eng. Mater. 1 (2011) 1073.