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Low bandgap alternating polyfluorene copolymers in plastic photodiodes and solar cells
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics .
Materials and Surface Chemistry, Chalmers University of Technology, 412 96 Göteborg, Sweden.
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 .
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2004 (English)In: Applied Physics A: Materials Science & Processing, ISSN 0947-8396, E-ISSN 1432-0630, Vol. 79, no 1, 31-35 p.Article in journal (Refereed) Published
Abstract [en]

We report a comparative study of plastic photodiodes using four different copolymers of fluorene, with a variation of alkyl side chain length and chemical structure. Photodiode materials are formed by blending the polymers with a fullerene derivative and spincoating the blend solution. A photovoltage of 1 V is obtained in devices, where the anode is a doped polymer and the cathode is LiF/Al. Monochromatic quantum efficiencies are better than 40% over most of the absorption range, and under solar light AM 1.5 simulation, we reach energy efficiencies beyond 2%. The high fill factors obtained in some of the devices indicate that these are of interest for more elaborate optimisation. Reasons for the benign electrical transport are discussed. © Springer-Verlag 2004.

Place, publisher, year, edition, pages
2004. Vol. 79, no 1, 31-35 p.
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Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-45728DOI: 10.1007/s00339-003-2498-5OAI: oai:DiVA.org:liu-45728DiVA: diva2:266624
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13

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Inganäs, OlleZhang, FenglingGadisa, AbayPersson, Nils-KristerWang, Xiangjun

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