Influence of polymer solar cell geometry on series resistance and device efficiency
Article first published online: 17 NOV 2009
Copyright © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
physica status solidi (a)
Volume 206, Issue 12, pages 2771–2774, December 2009
How to Cite
Muhsin, B., Renz, J., Drüe, K.-H., Gobsch, G. and Hoppe, H. (2009), Influence of polymer solar cell geometry on series resistance and device efficiency. Phys. Status Solidi A, 206: 2771–2774. doi: 10.1002/pssa.200925315
- Issue published online: 7 DEC 2009
- Article first published online: 17 NOV 2009
- Manuscript Accepted: 19 OCT 2009
- Manuscript Revised: 15 OCT 2009
- Manuscript Received: 17 JUN 2009
- Thuringian ministry of culture
In order to study the influence of the organic solar cell device layout on the photovoltaic parameters, we systematically varied its geometry. By knowledge of all sheet resistances in the device, we were able to correlate the series resistance with the geometry of the device using a simple model for its calculation. Deviations between experiment and calculation could be related with the solar cell geometry and understood by postulating curved transport ways of the current within the largely resistive ITO-layer. Thus, a further refinement of the calculation is required in order to minimize the deviation between calculation and experiment. Short solar cell lengths and ITO-bridges yield minimal series resistance and best conversion efficiency.
A schematic cross-section of a polymer solar cell displays the current flow through the device. The corresponding contributions to the series resistance are depicted as well.