Dresden 2009 – wissenschaftliches Programm

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SYOP: Symposium Organic Photovoltaics: From Single Molecules to Devices

SYOP 4: Organic Photovoltaics: from Single Molecules to Devices

SYOP 4.36: Poster

Donnerstag, 26. März 2009, 16:30–19:00, P1A

Photocurrent in organic solar cells obtained by pulsed IV-measurements — •Moritz Limpinsel1, Daniel Rauh2, Markus Mingebach1, Carsten Deibel1, and Vladimir Dyakonov1,21Julius-Maximilians-University of Würzburg, Institute of Physics, Experimental Physics VI, D-97074 Würzburg — 2Bavarian Centre for Applied Energy Research e.V. (ZAE Bayern), D-97074 Würzburg

The photocurrent in organic solar cells gives insight into fundamental device physics, as it allows determination of the field dependence of the photogeneration of charges. Its dependence on factors like absorber thickness and light intensity were observed and analysed. The magnitude of the photocurrent was obtained by IV-measurements under illumination by pulsed LEDs, which eliminate the overestimation of the device performance due to temperature effects made by sequential IV-measurements under constant illumination. We investigated bulk heterojunction solar cells with P3HT:PCBM blends as absorber layers, prepared by spin-coating. The built-in potential and the saturation photocurrent will be discussed in view of the internal field necessary to dissociate polaron-pairs.

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