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Polyfluorene copolymer based bulk heterojunction solar cells
Department of Chemistry, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia.
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics .
Department of Organic Chemistry, Chalmers University of Technology, Göteborg S-41296, Sweden.
Stratingh Institute, University of Groningen, Nijenborgh 4, Groningen 9747 AG, Netherlands.
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2004 (English)In: Thin Solid Films, ISSN 0040-6090, Vol. 449, no 1-2, 152-157 p.Article in journal (Refereed) Published
Abstract [en]

Bulk heterojunction solar cells based on blends of photoactive layers of polyfluorene copolymer Poly((2,7-(9-(2'-ethylhexyl)-9-hexyl-fluorene)-alt-5,5-(4', 7'-di-2-thienyl-2',1',3'-benzothiadiazole))-co-(2, 7-(9-(2'-ethylhexyl)-9-hexyl-fluorene)-alt-2,5-thiophene)) (LBPF3) acting as electron donor, and [6,6]-phenyl-C61-butyric acid methylester (PCBM), acting as electron acceptor, were constructed and studied. The power conversion efficiency for a 1:4 (by weight) blend of LBPF3:PCBM under simulated solar light illumination having light intensity of 100 mW/cm2 was 1.7%, and 9.2% under monochromatic (565 nm) light illumination with light intensity of 0.145 mW/cm2. The maximum external quantum efficiency (incident photons to converted electrons) for this device was found to be above 40% from 400 to 560 nm. The effects of blend composition and film thickness on the photovoltaic parameters were also studied. The incident light intensity dependence of the short circuit current showed a linear relationship. © 2003 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2004. Vol. 449, no 1-2, 152-157 p.
Keyword [en]
Optoelectronic devices, Polymers, Semiconductors, Solar cells
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-45825DOI: 10.1016/S0040-6090(03)01348-8OAI: diva2:266721
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-12

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Zhang, FenglingInganäs, Olle
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