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Structure-property relationships of small bandgap conjugated polymers for solar cells
Chalmers.
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.
Chalmers.
2009 (English)In: DALTON TRANSACTIONS, ISSN 1477-9226, Vol. 45, 10032-10039 p.Article in journal (Refereed) Published
Abstract [en]

Conjugated polymers as electron donors in solar cells based on donor/acceptor combinations are of great interest, partly due to the possibility of converting solar light with a low materials budget. Six small bandgap polymers with optical bandgap ranging from 1.0-1.9 eV are presented in this paper. All polymers utilize an electron donor-acceptor-donor (DAD) segment in the polymer backbone, creating a partial charge-transfer, to decrease the bandgap. The design, synthesis and the optical characteristics as well as the solar cell characteristics of the polymers are discussed. The positions of the energy levels of the conjugated polymer relative to the electron acceptor are of significant importance and determine not only the driving force for exciton dissociation but also the maximum open-circuit voltage. This work also focuses on investigating the redox behavior of the described conjugated polymers and electron acceptors using square wave voltammetry. Comparing the electrochemical data gives important information of the structure-property relationships of the polymers.

Place, publisher, year, edition, pages
2009. Vol. 45, 10032-10039 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-52382DOI: 10.1039/b913769fOAI: oai:DiVA.org:liu-52382DiVA: diva2:282197
Available from: 2009-12-18 Created: 2009-12-18 Last updated: 2010-01-13

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Zhang, FenglingInganäs, Olle

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