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Charge carrier extraction by linearly increasing voltage: Analytic framework and ambipolar transients
University Wurzburg.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Biomolekylär och Organisk Elektronik. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Biomolekylär och Organisk Elektronik. Linköpings universitet, Tekniska högskolan.
University Wurzburg.
Vise andre og tillknytning
2010 (engelsk)Inngår i: JOURNAL OF APPLIED PHYSICS, ISSN 0021-8979, Vol. 108, nr 11, s. 113705-Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
American Institute of Physics , 2010. Vol. 108, nr 11, s. 113705-
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Identifikatorer
URN: urn:nbn:se:liu:diva-66134DOI: 10.1063/1.3516392ISI: 000285474100065OAI: oai:DiVA.org:liu-66134DiVA, id: diva2:401944
Merknad
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/ Tilgjengelig fra: 2011-03-04 Laget: 2011-03-04 Sist oppdatert: 2011-03-07

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