title: Development of n-Type Semiconductor Based on Cyclopentene- or Cyclohexene-Fused [C60]-Fullerene Derivatives.
abstract: Properties of cyclopentene- or cyclohexene-fused [C60]-fullerene derivatives as the acceptor in photovoltaic cells have been investigated by use of poly(3-hexylthiophene) (P3HT) as the model donor polymer. Several cyclopentene- or cyclohexene-fused [C60]-fullerene derivatives show high power conversion efficiency (PCE). The highest PCE was obtained for 3',6'-dihydro-4'-phenoxycarbonyl-6'-methylbenzo[1,9][5,6](C60-Ih)fullerene (3.2%); this is superior to that of [C60]-PCBM with the P3HT polymer under the same experimental conditions. PCE of the OPV devices with alkyl-substituted cyclohexene-fused [C60]-fullerenes depended on the alkyl substituent on the cyclohexene ring; compounds with substituents of odd-number alkyl groups showed better PCE than those compounds possessing even-number alkyl groups.
authors: †Department of Chemistry and Biotechnology, Graduate School of Engineering, and ‡Center for Research on Green Sustainable Chemistry, Tottori University, 4-101 Koyama-minami, Tottori 680-8552, Japan.
authors: Yu
authors: Y
authors: Yamane
authors: †Department of Chemistry and Biotechnology, Graduate School of Engineering, and ‡Center for Research on Green Sustainable Chemistry, Tottori University, 4-101 Koyama-minami, Tottori 680-8552, Japan.
authors: Kiyotaka
authors: K
authors: Sugawara
authors: †Department of Chemistry and Biotechnology, Graduate School of Engineering, and ‡Center for Research on Green Sustainable Chemistry, Tottori University, 4-101 Koyama-minami, Tottori 680-8552, Japan.
authors: Naoshi
authors: N
authors: Nakamura
authors: †Department of Chemistry and Biotechnology, Graduate School of Engineering, and ‡Center for Research on Green Sustainable Chemistry, Tottori University, 4-101 Koyama-minami, Tottori 680-8552, Japan.
authors: Shuichi
authors: S
authors: Hayase
authors: †Department of Chemistry and Biotechnology, Graduate School of Engineering, and ‡Center for Research on Green Sustainable Chemistry, Tottori University, 4-101 Koyama-minami, Tottori 680-8552, Japan.
authors: Toshiki
authors: T
authors: Nokami
authors: †Department of Chemistry and Biotechnology, Graduate School of Engineering, and ‡Center for Research on Green Sustainable Chemistry, Tottori University, 4-101 Koyama-minami, Tottori 680-8552, Japan.
authors: Toshiyuki
authors: T
authors: Itoh