title: Tropolone as a High-Performance Robust Anchoring Group for Dye-Sensitized Solar Cells.
abstract: A tropolone group has been employed for the first time as an anchoring group for dye-sensitized solar cells (DSSCs). The DSSC based on a porphyrin, YD2-o-C8T, with a tropolone moiety exhibited a power-conversion efficiency of 7.7 %, which is only slightly lower than that observed for a reference porphyrin, YD2-o-C8, with a conventional carboxylic group. More importantly, YD2-o-C8T was found to be superior to YD2-o-C8 with respect to DSSC durability and binding ability to TiO2 . These results unambiguously demonstrate that tropolone is a highly promising dye-anchoring group for DSSCs in terms of device durability as well as photovoltaic performance.
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510 (Japan).
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Higashino
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510 (Japan).
authors.forename: Yamato
authors.initials: Y
authors.lastname: Fujimori
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510 (Japan).
authors.forename: Kenichi
authors.initials: K
authors.lastname: Sugiura
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510 (Japan).
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Tsuji
authors.affiliation: Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo, 671-2280 (Japan).
authors.forename: Seigo
authors.initials: S
authors.lastname: Ito
authors.affiliation: Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510 (Japan). imahori@scl.kyoto-u.ac.jp.|Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Nishikyo-ku, Kyoto, 615-8510 (Japan). imahori@scl.kyoto-u.ac.jp.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Imahori
keywords: anchoring groups; light harvesting; porphyrinoids; sensitizers; solar cells