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Licensed Unlicensed Requires Authentication Published by De Gruyter May 24, 2016

Thiophene-free diphenyl-amino-stilbene-diketo-pyrrolo-pyrrole derivatives as donors for organic bulk heterojunction solar cells

  • Jana Honová , Stanislav Luňák , Martin Vala , Stanislav Stříteský , Ladislav Fekete , Martin Weiter and Alexander Kovalenko EMAIL logo
From the journal Chemical Papers

Abstract

An extended study on a group of four soluble diphenyl-amino-stilbene based diphenyl-diketopyrrolo-pyrrole molecules has been carried out. Using the materials in thin-film transistors it was shown that the above-mentioned compounds can be successfully used as donors in organic photovoltaic devices. Influence of the molecular symmetry and solubilizing chain on the morphology and solar cell performance are described. It was shown that a shorter and non-branched ethyl acetate chain leads to higher charge carrier mobility, short circuit current, and better fill factor. After the basic optimization, a power conversion efficiency of about 1.5 % was reached. This, to the best of our knowledge, is the highest reported efficiency of thiophene-free small-molecule diketo-pyrrolopyrroles.

Acknowledgements

This work was supported by the Czech Science Foundation under project No. 15-05095S. Research infrastructure was supported by project MSMT No. LO1211. L.F. acknowledges MEYS: SAFMAT LM2015088 a LO1409.


Supplementary data

Supplementary data associated with this article can be found in the online version of this paper (DOI: 10.1515/chempap-2016-0068).


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Received: 2015-12-16
Revised: 2016-2-23
Accepted: 2016-2-23
Published Online: 2016-5-24
Published in Print: 2016-10-1

© 2016 Institute of Chemistry, Slovak Academy of Sciences

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