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Temperature dependent behavior of flat and bulk heterojunction organic solar cells

Published online by Cambridge University Press:  01 February 2013

Johannes Widmer ,
Karl Leo  and
Moritz Riede
Johannes Widmer*
Affiliation:
Institut für Angewandte Photophysik (IAPP), Technische Universität Dresden George-Bähr-Straße 1, 01062 Dresden, Germany
Karl Leo*
Affiliation:
Institut für Angewandte Photophysik (IAPP), Technische Universität Dresden George-Bähr-Straße 1, 01062 Dresden, Germany
Moritz Riede*
Affiliation:
Institut für Angewandte Photophysik (IAPP), Technische Universität Dresden George-Bähr-Straße 1, 01062 Dresden, Germany
*
*E-Mail: [email protected], [email protected], [email protected]
*E-Mail: [email protected], [email protected], [email protected]
*E-Mail: [email protected], [email protected], [email protected]
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Abstract

The open-circuit voltage of an organic solar cell is increasing with decreasing temperature and with increasing illumination intensity. These dependencies are quantitatively investigated for two types of organic solar cells, one with a flat donor-acceptor heterojunction and one with a mixed layer bulk heterojunction. Zinc-phthalocyanine and C60 are used as donor and acceptor, respectively. A qualitative difference is found for the two geometries. We find that a logarithmic illumination intensity dependence with temperature as a linear pre-factor of the logarithm, which is commonly reported and observed, is applicable for the bulk heterojunction. The flat heterojunction, in contrast, shows a constant illumination intensity pre-factor which is independent of the temperature, and the temperature can be modeled as additional linear summand.

Keywords

organicphotovoltaicdevices
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1493: Symposium E/H – Photovoltaic Technologies, Devices and Systems Based on Inorganic Materials, Small Organic Molecules and Hybrids , 2013 , pp. 269 - 273
Copyright
Copyright © Materials Research Society 2013 

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References

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