title: Novel photoactive fluorene-based terpolymers incorporating carbazole for photovoltaic application.
abstract: A series of novel photoactive conjugated terpolymers based on N-alkyl carbazole, 9,9-didecylfluorene, and bis(thienyl)benzothiadiazole were synthesized by the Pd-catalyzed Suzuki polymerization method with various molar ratios of the carbazole derivatives. Electron-deficient benzothiadiazole and electron-rich carbazole moieties were incorporated into the polymer backbone to obtain the broad absorption spectrum and to improve the hole-transporting characteristics, respectively. The polymer solar cell (PSC) was fabricated with a layered structure of ITO/PEDOT: PSS/polymer:C71-PCBM (1:3)/LiF/Al. The best performance of PSC was obtained at P1:C71-PCBM whose reaches a power conversion efficiency (PCE) of 2.62%, with a short circuit current density (J(SC)) of 8.61 mA/cm2, an open circuit voltage (V(OC)) of 0.82 V, and a fill factor (FF) of 0.37 under AM 1.5 G irradiation (100 mW/cm2).
authors.affiliation: Energy Materials Research Center Korea Research Institute of Chemical Technology, Sinseongno 19, Yuseong, Daejeon, 305-600, Korea.
authors.forename: Kyu Nam
authors.initials: KN
authors.lastname: Kim
authors.forename: Sang Kyu
authors.initials: SK
authors.lastname: Lee
authors.forename: Hye-Young
authors.initials: HY
authors.lastname: Lee
authors.forename: Dong-Ha
authors.initials: DH
authors.lastname: Kim
authors.forename: Jong-Cheol
authors.initials: JC
authors.lastname: Lee
authors.forename: Sang-Jin
authors.initials: SJ
authors.lastname: Moon