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Side-Chain Architectures of 2,7-Carbazole and Quinoxaline-Based Polymers for Efficient Polymer Solar Cells
Chalmers.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
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2011 (English)In: MACROMOLECULES, ISSN 0024-9297, Vol. 44, no 7, 2067-2073 p.Article in journal (Refereed) Published
Abstract [en]

Three polymers bearing a common carbazole thiophene quinoxaline thiophene backbone, but different side chains, were designed and synthesized in order to investigate the effect of side chains on their photovoltaic performance. Their photophysical, electrochemical, and photovoltaic properties were investigated and compared. The polymer EWC3, with the largest amount of side chains, showed the highest power conversion efficiency of 3.7% with an open-circuit voltage (V-oc) of 0.92 V. The atomic force microscopy images of the active layers of the devices showed that the morphology was highly influenced by the choice of the solvent and processing additive. It is worth noting that polymer solar cells (PSCs) fabricated from EWC3, with branched side chains on the carbazole units, gave a much higher V-oc than the devices made from EWC1, which bears the same electron-deficient segment as EWC3 but straight side chains on carbazole units. This study offered a useful and important guideline for designing 2,7-carbazole-based polymers for high-performance PSCs.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA , 2011. Vol. 44, no 7, 2067-2073 p.
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Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-67710DOI: 10.1021/ma102783dISI: 000289028500046OAI: oai:DiVA.org:liu-67710DiVA: diva2:412596
Available from: 2011-04-26 Created: 2011-04-26 Last updated: 2015-05-29

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Hou, LintaoWang, ZhongqiangMa, ZaifeiZhang, FenglingInganäs, Olle

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Hou, LintaoWang, ZhongqiangMa, ZaifeiZhang, FenglingInganäs, Olle
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Biomolecular and Organic ElectronicsThe Institute of TechnologyFaculty of Science & Engineering
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