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Field and temperature dependence of the photocurrent in polymer/fullerene bulk heterojunction solar cells
Eindhoven University of Technology, Netherlands.
Eindhoven University of Technology, Netherlands.ORCID iD: 0000-0002-7104-7127
Eindhoven University of Technology, Netherlands.
Eindhoven University of Technology, Netherlands.
2005 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 87, no 12, 122104Article in journal (Refereed) Published
Abstract [en]

The photocurrent in polymer/fullerene blends is characterized as a function of bias at temperatures ranging from 125 to 300 K. Assuming a constant generation rate and bimolecular recombination, the results are numerically modeled within the drift-diffusion approximation. Bimolecular recombination is found to be a dominant factor in the field dependence of the photocurrent in the entire measured voltage range. Inclusion of field dependent geminate pair dissociation and recombination via the Onsager expressions gives a much stronger field dependence than experimentally observed. From the temperature dependence of the extracted mobilities, we can simultaneously estimate the broadening of the transporting highest occupied and lowest unoccupied molecular orbital levels. (c) 2005 American Institute of Physics.

Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 2005. Vol. 87, no 12, 122104
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-141508DOI: 10.1063/1.2056609ISI: 000231907200038OAI: oai:DiVA.org:liu-141508DiVA: diva2:1145611
Available from: 2017-09-29 Created: 2017-09-29 Last updated: 2017-10-04

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Kemerink, Martijn
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