title: Addition of dihydromethano group to fullerenes to improve the performance of bulk heterojunction organic solar cells.
abstract: Adding a compact dihydromethano (CH2 ) group to a 58π-indene fullerene (C60 (Ind)) creates a 56π-electron dihydromethano/indene fullerene (C60 (CH2 )(Ind)) and raises the LUMO level with only a minimal increase in size. This class of compounds features reduced conjugation that raises the LUMO level, and a high electron mobility because of the small CH2 addend.
authors.affiliation: Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Matsuo
authors.forename: Junya
authors.initials: J
authors.lastname: Kawai
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Inada
authors.forename: Takafumi
authors.initials: T
authors.lastname: Nakagawa
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Ota
authors.forename: Saika
authors.initials: S
authors.lastname: Otsubo
authors.forename: Eiichi
authors.initials: E
authors.lastname: Nakamura
mesh_terms: D037741:Fullerenes / Q000737:chemistry*; D007192:Indenes / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D011789:Quantum Theory; D012993:Solar Energy
chemical_list: D037741:Fullerenes; D007192:Indenes; D011108:Polymers; C093581:indene
keywords: bulk heterojunction; electron transport; fullerene; photovoltaics; solar cells