title: Efficient solution-processed photovoltaic cells based on an anthradithiophene/fullerene blend.
abstract: We report photovoltaic cells based on solution-processed blends using a novel anthradithiophene derivative as the donor and a fullerene derivative as the acceptor. Solvent vapor annealing of these blends leads to the formation of spherulites, which consist of a network of anthradithiophene crystallites dispersed in an amorphous matrix composed primarily of fullerene. We observe a direct correlation between coverage of a device with spherulites and its performance. Devices with 82% spherulite coverage reach a power conversion efficiency of 1%, which makes them one of the highest performing solution-processed small molecule photovoltaic cells to date.
authors.affiliation: Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA.
authors.forename: Matthew T
authors.initials: MT
authors.lastname: Lloyd
authors.forename: Alex C
authors.initials: AC
authors.lastname: Mayer
authors.forename: Sankar
authors.initials: S
authors.lastname: Subramanian
authors.forename: Devin A
authors.initials: DA
authors.lastname: Mourey
authors.forename: Dave J
authors.initials: DJ
authors.lastname: Herman
authors.forename: Amit V
authors.initials: AV
authors.lastname: Bapat
authors.forename: John E
authors.initials: JE
authors.lastname: Anthony
authors.forename: George G
authors.initials: GG
authors.lastname: Malliaras