title: Molecular design rule of phthalocyanine dyes for highly efficient near-IR performance in dye-sensitized solar cells.
abstract: A series of zinc-phthalocyanine sensitizers (PcS16-18) with different adsorption sites have been designed and synthesized in order to investigate the dependence of adsorption-site structures on the solar-cell performances in zinc-phthalocyanine based dye-sensitized solar cells. The change of adsorption site affected the electron injection efficiency from the photoexcited dye into the nanocrystalline TiO2 semiconductor, as monitored by picosecond time-resolved fluorescence spectroscopy. The zinc-phthalocyanine sensitizer PcS18, possessing one carboxylic acid directly attached to the ZnPc ring and six 2,6-diisopropylphenoxy units, showed a record power conversion efficiency value of 5.9 % when used as a light-harvesting dye on a TiO2 electrode under one simulated solar condition.
authors.affiliation: Faculty of Textile Science and Technology, Shinshu University, Ueda 386-8567, Japan. mkimura@shinshu-u.ac.jp
authors.forename: Mutsumi
authors.initials: M
authors.lastname: Kimura
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Nomoto
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Suzuki
authors.forename: Takuro
authors.initials: T
authors.lastname: Ikeuchi
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Matsuzaki
authors.forename: Takuro N
authors.initials: TN
authors.lastname: Murakami
authors.forename: Akihiko
authors.initials: A
authors.lastname: Furube
authors.forename: Naruhiko
authors.initials: N
authors.lastname: Masaki
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Griffith
authors.forename: Shogo
authors.initials: S
authors.lastname: Mori