Kwak, C.K., Perez, G.E., Freestone, B.G. et al. (4 more authors) (2016) Improved efficiency in organic solar cells via conjugated polyelectrolyte additive in the hole transporting layer. Journal of Materials Chemistry C , 4 (45). pp. 10722-10730. ISSN 2050-7526
Abstract
An anionic conjugated polyelectrolyte poly[(9,9-bis(4-sulfonatobutyl sodium) fluorene-alt-phenylene)- ran-(4,7-di-2-thienyl-2,1,3-benzothiadiazole-alt-phenylene)] which exhibits good solubility in water was synthesised via Suzuki-cross coupling. This conjugated polyelectrolyte was used as an additive in the hole transporting layer within organic photovoltaic devices. There is an efficiency gain as a result of an improved carrier generation and charge transport across the interface into the hole transport layer when the work function of the hole transport later is well matched to the active layer of the solar cell. The best performances were achieved using 5 mg ml1 of the polyelectrolyte additive added to the hole transport layer solution in which case the average power conversion efficiency increased from 4.63% for reference devices without any additive to 5.26% when the additive is present which is a 13% improvement. The reproducibility of device performance was also significantly improved with the variation in fill factor, short circuit current and open circuit voltage all improving when the additive is present.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 The Royal Society of Chemistry. This is an author produced version of a paper subsequently published in Journal of Materials Chemistry C. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Chemical and Biological Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 09 Nov 2016 14:37 |
Last Modified: | 30 Jun 2023 15:40 |
Status: | Published |
Publisher: | Royal Society of Chemistry |
Refereed: | Yes |
Identification Number: | 10.1039/C6TC03771B |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:107177 |