Alqurashy, B.A., Iraqi, A. orcid.org/0000-0003-3060-6663, Zhang, Y. et al. (1 more author) (2016) Preparation and photovoltaic properties of pyrene-thieno[3,4-c]pyrrole-4,6-dione-based donor-acceptor polymers. European Polymer Journal, 85. C. pp. 225-235. ISSN 0014-3057
Abstract
Four new donor-acceptor conjugated copolymers, containing pyrene moieties flanked by thienyl or bithienyl groups as a donor units and thieno[3,4-c]pyrrole-4,6-dione (TPD) as acceptor units, were successfully prepared via a direct arylation polymerisation method. While all polymers prepared had 2-ethylhexyloxy-substituents on the pyrene repeat units, two different alkylsusbtituents (octyl or 4-hexylphenyl groups) were attached to their TPD moieties. The influence of these different substituents as well as the number of thienyl units linking the pyrene and TPD units along polymer chains on the photophysical, electronic and photovoltaic properties of these materials was investigated. All polymers displayed good thermal stability up to 315°C. The optical band gap of the four polymers, PPEHDT-TPDO, PPEHDT-TPDHP, PPEHDT2-TPDO and PPEHDT2-TPDHP, were estimated to be 2.00, 2.06, 1.94 and 1.91 eV, respectively. Polymers that possessed a single thiophene unit attached to the pyrene unit, PPEHDT-TPDO and PPEHDTTPDHP, displayed deeper HOMO levels compared to those with bithiophene units, PPEHDT2- TPDO and PPEHDT2-TPDHP. Photovoltaic devices were fabricated from all polymers. PPEHDT2-TPDO boasted the highest efficiency with a PCE (2.06 %), a FF of 53.07 %, a Jsc of 4.66 mA/cm2 and a Voc of 0.83 V.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 Elsevier. This is an author produced version of a paper subsequently published in European Polymer Journal. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/) |
Keywords: | Pyrene; thieno[3,4-c]pyrrole-4,6-dione; conjugated polymers; BHJ solar cells. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Chemistry (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 14 Nov 2016 15:49 |
Last Modified: | 12 Apr 2018 00:38 |
Published Version: | http://doi.org/10.1016/j.eurpolymj.2016.10.018 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.eurpolymj.2016.10.018 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:107266 |