Ultrafast energy and electron transfer in donor-acceptor molecules for photovoltaics

P.A. van Hal, E. Peeters, B.M.W. Langeveld-Voss, R.A.J. Janssen, G. Lanzani, G. Cerullo, C. Gadermaier, M. Zavelani-Rossi, S. Desilvestri, J. Knol, J.C. Hummelen

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Abstract

The rapid advancement in fullerene chemistry allows the covalent functionalization of C60 with electron donors. Various C60-based donor-acceptor dyads have been synthesized and studied to gain insight in the intramolecular photophysical processes, like energy and electron transfer. Although these dyads can serve as a model compounds for the conjugated photovoltaic cells, only a few examples have been reported with these C60-based dyads. Apart from being well-defined model systems for photophysical characterization, the covalent linkage between donor, and acceptor in these molecular arrays provides a simple method to achieve control over the phase segregation in donor-acceptor networks. We investigate an oligo(phenylene vinylene)fullerene dyad with 4 phenyl groups (C60-OPV4) in solvents of different polarity using femtosecond pump-probe spectroscopy. We find that photoexcitation of the oligomer leads first to an intramolecular energy transfer to the fullerene, while an electron transfer is a secondary process, only allowed in polar solvents.
Original languageEnglish
Title of host publicationTechnical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics, 2001. CLEO '01
Place of PublicationBaltimore, MD, USA
PublisherUniversity of Groningen, Stratingh Institute for Chemistry
Pages62-63
Number of pages2
ISBN (Print)1557526621
Publication statusPublished - 2001
EventConference on Lasers and Electro-Optics, 2001 -
Duration: 6-May-200111-May-2001

Conference

ConferenceConference on Lasers and Electro-Optics, 2001
Period06/05/200111/05/2001

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