title: Suppressing recombination in polymer photovoltaic devices via energy-level cascades.
abstract: An energy cascading structure is designed in a polymer photovoltaic device to suppress recombination and improve quantum yields. By the insertion of a thin polymer interlayer with intermediate energy levels, electrons and holes can effectively shuttle away from each other while being spatially separated from recombination. An increase in open-circuit voltage and short-circuit current are observed in modified devices.
authors.affiliation: Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, UK.
authors.forename: Zhi-Kuang
authors.initials: ZK
authors.lastname: Tan
authors.forename: Kerr
authors.initials: K
authors.lastname: Johnson
authors.forename: Yana
authors.initials: Y
authors.lastname: Vaynzof
authors.forename: Artem A
authors.initials: AA
authors.lastname: Bakulin
authors.forename: Lay-Lay
authors.initials: LL
authors.lastname: Chua
authors.forename: Peter K H
authors.initials: PK
authors.lastname: Ho
authors.forename: Richard H
authors.initials: RH
authors.lastname: Friend
mesh_terms: D011211:Electric Power Supplies; D004579:Electron Transport; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008422:Materials Testing; D008567:Membranes, Artificial; D011108:Polymers / Q000737:chemistry*; D012993:Solar Energy
chemical_list: D008567:Membranes, Artificial; D011108:Polymers
keywords: cascades; crosslinking; interlayers; polymer photovoltaics; recombination