title: Photocurrent generation in polymer-fullerene bulk heterojunctions.
abstract: The photocurrent in conjugated polymer-fullerene blends is dominated by the dissociation efficiency of bound electron-hole pairs at the donor-acceptor interface. A model based on Onsager's theory of geminate charge recombination explains the observed field and temperature dependence of the photocurrent in PPV:PCBM blends. At room temperature only 60% of the generated bound electron-hole pairs are dissociated and contribute to the short-circuit current, which is a major loss mechanism in photovoltaic devices based on this material system.
authors.affiliation: Molecular Electronics, Materials Science CentrePlus, University of Groningen, Nijenborgh 4, NL-9747 AG Groningen, The Netherlands.
authors.forename: V D
authors.initials: VD
authors.lastname: Mihailetchi
authors.forename: L J A
authors.initials: LJ
authors.lastname: Koster
authors.forename: J C
authors.initials: JC
authors.lastname: Hummelen
authors.forename: P W M
authors.initials: PW
authors.lastname: Blom