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Synthesis and characterization of three small band gap conjugated polymers for solar cell applications
Chalmers.
Chalmers.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, The Institute of Technology.
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2010 (English)In: POLYMER CHEMISTRY, ISSN 1759-9954, Vol. 1, no 8, 1272-1280 p.Article in journal (Refereed) Published
Abstract [en]

We report on a new series of small band gap conjugated polymers utilizing donor-acceptor-donor substructures in the polymer backbone to broaden and extend the optical absorption to longer wavelengths. Three polymers were prepared by Suzuki polymerization, using the same donor-acceptor-donor segment but with different comonomers. The goal was to investigate how the optical and electronic properties of the polymers were influenced by the different comonomers. Electrochemical spectroscopy, using square-wave voltammetry, shows that increasing the electron-donating strength of the comonomer will raise the HOMO energy level of the polymer, resulting in a decreased band gap. This result is also manifested by comparing open-circuit voltages from the corresponding laboratory fabricated solar cells. The best performing photovoltaic cell, based on APFO-Green15/[60]PCBM (1 : 4 w/w), reached a J(sc) of 4.2 mA cm(-2), a V-oc of 0.73 V, and a FF of 0.54, giving a PCE of 1.7%.

Place, publisher, year, edition, pages
Royal Society of Chemistry , 2010. Vol. 1, no 8, 1272-1280 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-60691DOI: 10.1039/c0py00152jISI: 000282612700014OAI: oai:DiVA.org:liu-60691DiVA: diva2:359876
Available from: 2010-11-01 Created: 2010-10-22 Last updated: 2015-05-29

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Zhou, YiZhang, FenglingInganäs, Olle

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Biomolecular and Organic ElectronicsFaculty of Science & EngineeringThe Institute of Technology
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