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From short to long - Optical and electrical transients in photovoltaic bulk heterojunctions of polyfluorene/fullerenes
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.
2009 (English)In: Chemical Physics Letters, ISSN 0009-2614, E-ISSN 1873-4448, Vol. 357, no 1-3, 120-123 p.Article in journal (Refereed) Published
Abstract [en]

We combine results from transient optical absorption in a bulk heterojunction polymer donor/fullerene acceptor material, obtained in the optical range as well as in the THz range, with results from electrical transients after a short light pulse, to present a unified interpretation of the transport of charge after the very first act of photoinduced charge transfer. We find that the mobility of charges is initially very high, but dramatically reduced with time, to arrive at values three orders of magnitude lower. We show that this can be understood as a consequence of the transport of hot charges by hopping through the density of states, from higher to lower energies.

Place, publisher, year, edition, pages
2009. Vol. 357, no 1-3, 120-123 p.
Keyword [en]
Bulk heterojunction, Polymer photovoltaics
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-17384DOI: 10.1016/j.chemphys.2008.11.011OAI: oai:DiVA.org:liu-17384DiVA: diva2:208926
Available from: 2009-03-21 Created: 2009-03-21 Last updated: 2017-12-13

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Andersson, MattiasInganäs , Olle

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Biomolecular and Organic Electronics The Institute of Technology
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