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Issue 6, 2013
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IR sensitization of an indene-C60 bisadduct (ICBA) in ternary organic solar cells

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Abstract

This article presents a smart strategy to successfully tackle two main limitations of organic solar cells (OSCs) in one step: the narrow absorption window of polymers as well as the Voc limitation related to the mono-PCBM. We demonstrate the high OSC performance of >5% in the combination of a fullerene multiadduct, i.e. indene-C60 bisadduct (ICBA) with a low bandgap polymer employing the concept of ternary OSCs. Solar cells achieving a fill factor (FF) of >60% along with high quantum efficiency in the near IR region are demonstrated for ternary composites consisting of P3HT, the fullerene-bisindene adduct of ICBA and a low bandgap copolymer sensitizer. Using P3HT as an efficient transport matrix with non-Langevin recombination dynamics allowed us to limit and overcome the otherwise dominant recombination losses of the indene-C60 bisadduct – low bandgap copolymer blends. The success of this strategy resulted in a relative efficiency improvement of over 25%.

Graphical abstract: IR sensitization of an indene-C60 bisadduct (ICBA) in ternary organic solar cells

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Article information


Submitted
28 Dec 2012
Accepted
11 Mar 2013
First published
28 Mar 2013

Energy Environ. Sci., 2013,6, 1796-1801
Article type
Communication

IR sensitization of an indene-C60 bisadduct (ICBA) in ternary organic solar cells

T. Ameri, T. Heumüller, J. Min, N. Li, G. Matt, U. Scherf and C. J. Brabec, Energy Environ. Sci., 2013, 6, 1796
DOI: 10.1039/C3EE24512H

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