Development of strongly absorbing S,N-heterohexacene-based donor materials for efficient vacuum-processed organic solar cells

Christoph Wetzel; Amaresh Mishra; Elena Mena-Osteritz; Karsten Walzer; Martin Pfeiffer; Peter Bäuerle

doi:10.1039/C5TC03539B

Development of strongly absorbing S,N-heterohexacene-based donor materials for efficient vacuum-processed organic solar cells

Christoph Wetzel,^a Amaresh Mishra,^a Elena Mena-Osteritz,^a Karsten Walzer,^b Martin Pfeiffer^b and Peter Bäuerle*^a

Author affiliations

* Corresponding authors

^a Institute of Organic Chemistry II and Advanced Materials, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany
E-mail: peter.baeuerle@uni-ulm.de

^b Heliatek GmbH, Treidlerstrasse 3, 01139 Dresden, Germany

Abstract

A series of terminal dicyanovinylene (DCV)-substituted S,N-heterohexacenes with variable lengths of alkyl chains were synthesized and characterized for application in vacuum-processed planar-heterojunction and bulk-heterojunction organic solar cells. X-ray single crystal analysis of hexyl-substituted derivative 4 revealed that the molecules are ordered in columns via π–π-stacking. While the influence of the alkyl chain length is negligible on the optoelectronic properties, an odd–even effect was observed with respect to the photovoltaic performance. Vacuum-processed planar-heterojunction organic solar cells prepared using DCV-substituted S,N-heterohexacenes as electron donors and C₆₀ as the acceptor showed extraordinary high efficiencies of up to 5.0%. Bulk-heterojunction solar cells incorporating pentyl derivative 3 and C₆₀ led to excellent power conversion efficiencies of up to 7.1% exceeding those of previously reported S,N-heteropentacenes.

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Publication details

The article was received on 28 Oct 2015, accepted on 21 Dec 2015 and first published on 22 Dec 2015

Article type: Paper

DOI: 10.1039/C5TC03539B

Author version available: Download Author version (PDF)

Citation: J. Mater. Chem. C, 2016,4, 3715-3725

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Development of strongly absorbing S,N-heterohexacene-based donor materials for efficient vacuum-processed organic solar cells

C. Wetzel, A. Mishra, E. Mena-Osteritz, K. Walzer, M. Pfeiffer and P. Bäuerle, J. Mater. Chem. C, 2016, 4, 3715
DOI: 10.1039/C5TC03539B
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Journal of Materials Chemistry C

Development of strongly absorbing S,N-heterohexacene-based donor materials for efficient vacuum-processed organic solar cells

Abstract

Supplementary files

Publication details

Development of strongly absorbing S,N-heterohexacene-based donor materials for efficient vacuum-processed organic solar cells

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