title: Wide band gap diketopyrrolopyrrole-based conjugated polymers incorporating biphenyl units applied in polymer solar cells.
abstract: Incorporating biphenyls as co-monomers in electron-deficient diketopyrrolopyrrole (DPP) conjugated polymers enables widening the optical band gap to 1.70 eV. Power conversion efficiencies of 3.7-5.7% and high open-circuit voltages of 0.80-0.93 V are obtained in solar cells based on these wide band gap DPP polymers.
authors.affiliation: Molecular Materials and Nanosystems, Eindhoven University of Technology, P. O. Box 513, 5600 MB Eindhoven, The Netherlands. r.a.j.janssen@tue.nl.
authors.forename: Weiwei
authors.initials: W
authors.lastname: Li
authors.forename: Alice
authors.initials: A
authors.lastname: Furlan
authors.forename: W S Christian
authors.initials: WS
authors.lastname: Roelofs
authors.forename: Koen H
authors.initials: KH
authors.lastname: Hendriks
authors.forename: Gijs W P
authors.initials: GW
authors.lastname: van Pruissen
authors.forename: Martijn M
authors.initials: MM
authors.lastname: Wienk
authors.forename: René A J
authors.initials: RA
authors.lastname: Janssen