title: Vinyl-type polynorbornenes with pendant PCBM: a novel acceptor for organic solar cells.
abstract: Vinyl addition homo- and copolymerization of norbornene monomer (M1) functionalized with a PCBM moiety using a Pd(II) catalyst in combination with a 1-octene chain transfer agent efficiently produces polynorbornenes with side-chain PCBM groups. Characterization by NMR spectroscopy and elemental analysis reveals that the copolymers constitute a well-defined polymer structure with controlled incorporation of M1. Although the homopolymer is insoluble in organic solvents, the copolymers containing 62 mol% (P2) and 50 mol% (P3) of the PCBM moiety are soluble in chlorinated solvents such as o-dichlorobenzene. The bulk-heterojunction organic photovoltaic devices fabricated based on the P3HT:P3 blends show that P3 can adequately function as an electron acceptor, leading to a cell with a power conversion efficiency of 1.5%, which is outstanding among the polymeric rivals.
authors.affiliation: Department of Chemistry, KAIST, Daejeon 305-701, Republic of Korea.
authors.forename: Maengsun
authors.initials: M
authors.lastname: Eo
authors.forename: Soohyun
authors.initials: S
authors.lastname: Lee
authors.forename: Myung Hwan
authors.initials: MH
authors.lastname: Park
authors.forename: Min Hyung
authors.initials: MH
authors.lastname: Lee
authors.forename: Seunghyup
authors.initials: S
authors.lastname: Yoo
authors.forename: Youngkyu
authors.initials: Y
authors.lastname: Do
mesh_terms: D011211:Electric Power Supplies; D037741:Fullerenes / Q000737:chemistry*; D009636:Norbornanes / Q000138:chemical synthesis* / Q000737:chemistry; D058105:Polymerization; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D012993:Solar Energy
chemical_list: C539575:(6,6)-phenyl C61-butyric acid methyl ester; D037741:Fullerenes; D009636:Norbornanes; D011108:Polymers