title: Superabsorbing fullerenes: spectral and kinetic characterization of photoinduced interactions in perylenediimide-fullerene-C60 dyads.
abstract: Two n-type molecular materials are covalently combined into a new photovoltaic component for polymer solar cells. Light harvesting by the perylenediimide results in very fast energy transfer to the fullerene unit, as shown with femtosecond transient absorption spectroscopy in toluene solution. Two energy transfer rates are observed of 2.5 x 10(12) s-1 (53%) and 2 x 10(11) s-1 (47%), attributed to two conformations. The final excited state that is populated is a perylenediimide-based triplet state that is formed on the nanosecond time scale with a high yield.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Baffreau
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Leroy-Lhez
authors.forename: Piétrick
authors.initials: P
authors.lastname: Hudhomme
authors.forename: Michiel M
authors.initials: MM
authors.lastname: Groeneveld
authors.forename: Ivo H M
authors.initials: IH
authors.lastname: van Stokkum
authors.forename: René M
authors.initials: RM
authors.lastname: Williams