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Dominating recombination mechanisms in organic solar cells based on ZnPc and C-60
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, The Institute of Technology. Technical University of Dresden, Germany .
Technical University of Dresden, Germany .
Technical University of Dresden, Germany .
2013 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 102, no 16Article in journal (Refereed) Published
Abstract [en]

We investigate the dominating recombination mechanisms in bulk heterojunction solar cells, using a blend of ZnPc and C-60 as model system. Analyzing the open-circuit voltage (V-oc) as a function of illumination intensity, we find that trap-assisted recombination dominates for low light intensities, whereas at 1 sun, direct/bimolecular recombination becomes important. The recombination parameters are not significantly influenced by the blend mixing ratio and are also valid for injected charges. By changing the hole transport layer, recombination at the contact is separately identified as further mechanism reducing Voc at higher light intensities.

Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 2013. Vol. 102, no 16
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-93861DOI: 10.1063/1.4802276ISI: 000318269300102OAI: oai:DiVA.org:liu-93861DiVA: diva2:627348
Note

Funding Agencies|BMBF (OPEG)|13N9720|Reiner Lemoine foundation||

Available from: 2013-06-11 Created: 2013-06-11 Last updated: 2017-12-06

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Tress, Wolfgang

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