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Perylene sensitization of fullerenes for improved performance in organic photovoltaics

Perylene sensitization of fullerenes for improved performance in organic photovoltaics

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HESSE, Holger C., Jonas WEICKERT, Christian HUNDSCHELL, Xinliang FENG, Klaus MÜLLEN, Bert NICKEL, Attila J. MOZER, Lukas SCHMIDT-MENDE, 2011. Perylene sensitization of fullerenes for improved performance in organic photovoltaics. In: Advanced Energy Materials. 1(5), pp. 861-869. ISSN 1614-6832

@article{Hesse2011Peryl-17914, title={Perylene sensitization of fullerenes for improved performance in organic photovoltaics}, year={2011}, doi={10.1002/aenm.201100211}, number={5}, volume={1}, issn={1614-6832}, journal={Advanced Energy Materials}, pages={861--869}, author={Hesse, Holger C. and Weickert, Jonas and Hundschell, Christian and Feng, Xinliang and Müllen, Klaus and Nickel, Bert and Mozer, Attila J. and Schmidt-Mende, Lukas} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/17914"> <dc:language>eng</dc:language> <dc:creator>Mozer, Attila J.</dc:creator> <dcterms:issued>2011</dcterms:issued> <dc:creator>Weickert, Jonas</dc:creator> <dc:contributor>Feng, Xinliang</dc:contributor> <dcterms:abstract xml:lang="eng">We present the addition of an energy relay dye to fullerenes resulting in increased light harvesting and signifi cantly improved power conversion efficiency for organic photovoltaic (OPV) devices. Although exhibiting excellent properties as electron acceptors, visible light absorption of fullerenes is limited. Strongly light absorbing donor materials are needed for efficient light harvesting in the thin active layer of OPV devices. Therefore, photocurrent generation and thus power conversion effi ciency of this type of solar cell is confined by the overlap of the relatively narrow absorption band of commonly used donor molecules with the solar spectrum. Herein the concept of fullerene dye sensitization is presented, which allows increased light harvesting on the electron acceptor side of the heterojunction. The concept is exemplarily shown for an UV absorbing small molecule and a near infrared absorbing polymer, namely hexa- peri -hexabenzocoronene (HBC) and Poly[2,1,3-benzothiadiazole-4,7-diyl[4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1- b:3,4-b’]dithiophene-2,6-diyl]] (PCPDTBT), respectively. In both systems remarkably higher power conversion effi ciency is achieved via perylene sensitization of the fullerene acceptor. Steady state photoluminescence, transient absorption and transient photocurrent decay studies reveal pathways of the additionally generated excited states at the sensitizer molecule. The findings suggest fluorescence resonance energy transfer from the photo-excited dye to the fullerene enabling decoupling of light absorption and charge transport. The presented sensitization method is proposed as a viable new concept for performance enhancement in organic photovoltaic devices.</dcterms:abstract> <dc:contributor>Hesse, Holger C.</dc:contributor> <dcterms:rights rdf:resource="http://nbn-resolving.org/urn:nbn:de:bsz:352-20140905103605204-4002607-1"/> <dc:creator>Feng, Xinliang</dc:creator> <dc:creator>Schmidt-Mende, Lukas</dc:creator> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/17914"/> <dc:rights>deposit-license</dc:rights> <dc:contributor>Schmidt-Mende, Lukas</dc:contributor> <dc:creator>Hesse, Holger C.</dc:creator> <dc:contributor>Weickert, Jonas</dc:contributor> <dc:contributor>Hundschell, Christian</dc:contributor> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2012-02-29T11:24:40Z</dc:date> <dc:contributor>Müllen, Klaus</dc:contributor> <dc:creator>Hundschell, Christian</dc:creator> <dc:contributor>Mozer, Attila J.</dc:contributor> <dcterms:bibliographicCitation>Publ. in: Advanced Energy Materials ; 1 (2011), 5. - pp. 861-869</dcterms:bibliographicCitation> <dc:contributor>Nickel, Bert</dc:contributor> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2012-02-29T11:24:40Z</dcterms:available> <dc:creator>Müllen, Klaus</dc:creator> <dc:creator>Nickel, Bert</dc:creator> <dcterms:title>Perylene sensitization of fullerenes for improved performance in organic photovoltaics</dcterms:title> </rdf:Description> </rdf:RDF>

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