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Electroluminescence from Charge Transfer States in Polymer Solar Cells
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics . Linköping University, The Institute of Technology.
Hasselt University.
Hasselt University.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics . Linköping University, The Institute of Technology.
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2009 (English)In: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, ISSN 0002-7863, Vol. 131, no 33, 11819-11824 p.Article in journal (Refereed) Published
Abstract [en]

In this article we report the weak but omnipresent electroluminescence (EL) from several types of organic polymer:fullerene bulk heterojunction solar cells biased in the forward direction. The light emitted from blends of Some commonly used polymers and the fullerene molecule is significantly different from that of any of the pure materials comprising the blend. The lower energy of the blend EL is found to correlate with both the voltage onset of emission and the open-circuit voltage of the photovoltaic cell under solar illumination. WE., accordingly interpret the emission to originate from interfacial charge transfer state recombination and emphasize EL as a very valuable tool to characterize the charge transfer state present in donor/acceptor organic photovoltaic (OPV) cells.

Place, publisher, year, edition, pages
2009. Vol. 131, no 33, 11819-11824 p.
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Natural Sciences
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URN: urn:nbn:se:liu:diva-20589DOI: 10.1021/ja903100pOAI: oai:DiVA.org:liu-20589DiVA: diva2:235305
Available from: 2009-09-15 Created: 2009-09-15 Last updated: 2009-09-15

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Tvingstedt, KristoferZhang, FenglingInganäs, Olle

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