title: Small-bandgap polymer solar cells with unprecedented short-circuit current density and high fill factor.
abstract: Small-bandgap polymer solar cells (PSCs) with a thick bulk heterojunction film of 340 nm exhibit high power conversion efficiencies of 9.40% resulting from high short-circuit current density (JSC ) of 20.07 mA cm(-2) and fill factor of 0.70. This remarkable efficiency is attributed to maximized light absorption by the thick active layer and minimized recombination by the optimized lateral and vertical morphology through the processing additive.
authors.affiliation: Department of Chemistry, College of Natural Sciences, Hanyang University, Seoul, 133-791, South Korea.
authors.forename: Hyosung
authors.initials: H
authors.lastname: Choi
authors.affiliation: School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, South Korea.
authors.forename: Seo-Jin
authors.initials: SJ
authors.lastname: Ko
authors.affiliation: School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, South Korea.
authors.forename: Taehyo
authors.initials: T
authors.lastname: Kim
authors.affiliation: Department of Chemistry, Laval University, Quebec City, QC, G1V 0A6, Canada.
authors.forename: Pierre-Olivier
authors.initials: PO
authors.lastname: Morin
authors.affiliation: School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, South Korea.
authors.forename: Bright
authors.initials: B
authors.lastname: Walker
authors.affiliation: Center for Polymers and Organic Solids, University of California Santa Barbara (UCSB), Santa Barbara, CA, 93106, USA.
authors.forename: Byoung Hoon
authors.initials: BH
authors.lastname: Lee
authors.affiliation: Department of Chemistry, Laval University, Quebec City, QC, G1V 0A6, Canada.
authors.forename: Mario
authors.initials: M
authors.lastname: Leclerc
authors.affiliation: School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, South Korea.
authors.forename: Jin Young
authors.initials: JY
authors.lastname: Kim
authors.affiliation: Center for Polymers and Organic Solids, University of California Santa Barbara (UCSB), Santa Barbara, CA, 93106, USA.
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Heeger
keywords: bulk heterojunction; polymer solar cells; processing additives; small bandgap; vertical morphology