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Temperature Dependence of Charge Carrier Generation in Organic Photovoltaics
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, The Institute of Technology. University of Cambridge, England.ORCID iD: 0000-0002-2582-1740
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, The Institute of Technology.
University of Cambridge, England; Nanjing Technical University, Peoples R China; Nanjing Technical University, Peoples R China.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, The Institute of Technology.
2015 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 114, no 12, 128701- p.Article in journal (Refereed) Published
Abstract [en]

The charge generation mechanism in organic photovoltaics is a fundamental yet heavily debated issue. All the generated charges recombine at the open-circuit voltage (VOC), so that investigation of recombined charges at VOC provides a unique approach to understanding charge generation. At low temperatures, we observe a decrease of VOC, which is attributed to reduced charge separation. Comparison between benchmark polymer: fullerene and polymer: polymer blends highlights the critical role of charge delocalization in charge separation and emphasizes the importance of entropy in charge generation.

Place, publisher, year, edition, pages
American Physical Society , 2015. Vol. 114, no 12, 128701- p.
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:liu:diva-117377DOI: 10.1103/PhysRevLett.114.128701ISI: 000351735600018OAI: oai:DiVA.org:liu-117377DiVA: diva2:807848
Note

Funding Agencies|National Basic Research Program of China [2015CB932200]; Natural Science Foundation of Jiangsu [BK20131413]; National Natural Science Foundation of China [11474164]; Swedish Research Council (VR); European Commission Marie Sklodowska-Curie actions; Swedish Energy Agency; Knut and AliceWallenberg foundation (KAW)

Available from: 2015-04-24 Created: 2015-04-24 Last updated: 2017-12-04

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Gao, FengTress, WolfgangInganäs, Olle

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