Coherent ultrafast charge transfer in an organic photovoltaic blend


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FALKE, Sarah Maria, Carlo Andrea ROZZI, Daniele BRIDA, Margherita MAIURI, Michele AMATO, Ephraim SOMMER, Antoinietta DE SIO, Angel RUBIO, Giulio CERULLO, Elisa MOLINARI, Christoph LIENAU, 2014. Coherent ultrafast charge transfer in an organic photovoltaic blend. In: Science. 344(6187), pp. 1001-1005. ISSN 0036-8075. eISSN 1095-9203

@article{Falke2014Coher-29558, title={Coherent ultrafast charge transfer in an organic photovoltaic blend}, year={2014}, doi={10.1126/science.1249771}, number={6187}, volume={344}, issn={0036-8075}, journal={Science}, pages={1001--1005}, author={Falke, Sarah Maria and Rozzi, Carlo Andrea and Brida, Daniele and Maiuri, Margherita and Amato, Michele and Sommer, Ephraim and De Sio, Antoinietta and Rubio, Angel and Cerullo, Giulio and Molinari, Elisa and Lienau, Christoph} }

<rdf:RDF xmlns:rdf="" xmlns:bibo="" xmlns:dc="" xmlns:dcterms="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dcterms:issued>2014</dcterms:issued> <dc:creator>Maiuri, Margherita</dc:creator> <dc:contributor>Lienau, Christoph</dc:contributor> <dc:contributor>Maiuri, Margherita</dc:contributor> <dcterms:abstract xml:lang="eng">Blends of conjugated polymers and fullerene derivatives are prototype systems for organic photovoltaic devices. The primary charge-generation mechanism involves a light-induced ultrafast electron transfer from the light-absorbing and electron-donating polymer to the fullerene electron acceptor. Here, we elucidate the initial quantum dynamics of this process. Experimentally, we observed coherent vibrational motion of the fullerene moiety after impulsive optical excitation of the polymer donor. Comparison with first-principle theoretical simulations evidences coherent electron transfer between donor and acceptor and oscillations of the transferred charge with a 25-femtosecond period matching that of the observed vibrational modes. Our results show that coherent vibronic coupling between electronic and nuclear degrees of freedom is of key importance in triggering charge delocalization and transfer in a noncovalently bound reference system.</dcterms:abstract> <dc:creator>Amato, Michele</dc:creator> <dc:creator>De Sio, Antoinietta</dc:creator> <dc:language>eng</dc:language> <dc:creator>Cerullo, Giulio</dc:creator> <dc:contributor>De Sio, Antoinietta</dc:contributor> <dc:date rdf:datatype="">2015-01-21T07:58:40Z</dc:date> <dc:contributor>Amato, Michele</dc:contributor> <dcterms:available rdf:datatype="">2015-01-21T07:58:40Z</dcterms:available> <dc:creator>Rubio, Angel</dc:creator> <dc:contributor>Sommer, Ephraim</dc:contributor> <dc:creator>Sommer, Ephraim</dc:creator> <dc:creator>Lienau, Christoph</dc:creator> <dc:contributor>Falke, Sarah Maria</dc:contributor> <dc:creator>Molinari, Elisa</dc:creator> <dc:contributor>Molinari, Elisa</dc:contributor> <dc:creator>Falke, Sarah Maria</dc:creator> <bibo:uri rdf:resource=""/> <dc:contributor>Cerullo, Giulio</dc:contributor> <dc:creator>Rozzi, Carlo Andrea</dc:creator> <dc:contributor>Rubio, Angel</dc:contributor> <dc:contributor>Brida, Daniele</dc:contributor> <dcterms:title>Coherent ultrafast charge transfer in an organic photovoltaic blend</dcterms:title> <dc:contributor>Rozzi, Carlo Andrea</dc:contributor> <dc:creator>Brida, Daniele</dc:creator> </rdf:Description> </rdf:RDF>

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