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Influence of Molecular Weight on the Performance of Organic Solar Cells Based on a Fluorene Derivative
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
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.
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2010 (English)In: ADVANCED FUNCTIONAL MATERIALS, ISSN 1616-301X, Vol. 20, no 13, 2124-2131 p.Article in journal (Refereed) Published
Abstract [en]

The performance of organic photovoltaic (OPV) bulk-heterojunction blends comprising a liquid-crystalline fluorene derivative and a small-molecular fullerene is found to increase asymptotically with the degree of polymerization of the former. Similar to various thermodynamic transition temperatures as well as the light absorbance of the fluorene moiety, the photocurrent extracted from OPV devices is found to strongly vary with increasing oligomer size up to a number average molecular weight, M-n approximate to 10 kg mol(-1), but is rendered less chain-length dependent for higher M-n as the fluorene derivative gradually adopts polymeric behavior.

Place, publisher, year, edition, pages
John Wiley and Sons, Ltd , 2010. Vol. 20, no 13, 2124-2131 p.
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Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-58539DOI: 10.1002/adfm.201000224ISI: 000280276900013OAI: oai:DiVA.org:liu-58539DiVA: diva2:343390
Available from: 2010-08-13 Created: 2010-08-13 Last updated: 2015-05-29

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Müller, ChristianAndersson, MattiasTvingstedt, KristoferZhou, YiInganäs, Olle

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Biomolecular and Organic ElectronicsFaculty of Science & EngineeringThe Institute of Technology
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