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Charge carrier extraction by linearly increasing voltage: Analytic framework and ambipolar transients
University Wurzburg.
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.
University Wurzburg.
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2010 (English)In: JOURNAL OF APPLIED PHYSICS, ISSN 0021-8979, Vol. 108, no 11, 113705- p.Article in journal (Refereed) Published
Abstract [en]

Up to now the basic theoretical description of charge extraction by linearly increasing voltage (CELIV) is solved for a low conductivity approximation only. Here we present the full analytical solution, thus generalize the theoretical framework for this method. We compare the analytical solution and the approximated theory, showing that especially for typical organic solar cell materials the latter approach has a very limited validity. Photo-CELIV measurements on poly(3-hexyl thiophene-2,5-diyl):[6,6]-phenyl-C-61 butyric acid methyl ester based solar cells were then evaluated by fitting the current transients to the analytical solution. We found that the fit results are in a very good agreement with the experimental observations, if ambipolar transport is taken into account, the origin of which we will discuss. Furthermore we present parametric equations for the mobility and the charge carrier density, which can be applied over the entire experimental range of parameters.

Place, publisher, year, edition, pages
American Institute of Physics , 2010. Vol. 108, no 11, 113705- p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-66134DOI: 10.1063/1.3516392ISI: 000285474100065OAI: oai:DiVA.org:liu-66134DiVA: diva2:401944
Note
Original Publication: J Lorrmann, B H Badada, Olle Inganäs, V Dyakonov and C Deibel, Charge carrier extraction by linearly increasing voltage: Analytic framework and ambipolar transients, 2010, JOURNAL OF APPLIED PHYSICS, (108), 11, 113705. http://dx.doi.org/10.1063/1.3516392 Copyright: American Institute of Physics http://www.aip.org/ Available from: 2011-03-04 Created: 2011-03-04 Last updated: 2011-03-07

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