title: Novel fluorous amphiphilic heteroleptic Ru-based complexes for a dye-sensitized solar cell: the first fluorous bis-ponytailed amphiphilic Ru complexes.
abstract: A new series of amphiphilic heteroleptic ruthenium(II) sensitizers with a fluorous bis-ponytailed bipyridine ancillary ligand, [Ru(H(2)dcbpy)(4,4'-bis(R(f)CH(2)OCH(2))-2,2'-bpy)(NCS)(2)] [where R(f) = HCF(2)CF(2) (CT4), C(3)F(7) (CT7), and HCF(2)CF(2)CF(2)CF(2) (CT8)], have been synthesized and fully characterized by UV/vis, visible emission, NMR, fast atom bombardment mass spectrometry, and cyclic voltammetric studies. Dye-sensitized solar cells (DSCs) based on these dyes exhibit efficiencies comparable with that of the standard cell based on N719. The conversion efficiency of a CT7- or CT8-based DSC is ~9% higher than that of Z907 with a nonfluorous bis-ponytailed bipyridine ancillary ligand. The fluorous chains were found to increase the dye density on TiO(2) and to help to suppress the dye desorption.
authors.affiliation: Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 106, Taiwan. normanlu@ntut.edu.tw
authors.forename: Norman
authors.initials: N
authors.lastname: Lu
authors.forename: Jia-Sheng
authors.initials: JS
authors.lastname: Shing
authors.forename: Wen-Han
authors.initials: WH
authors.lastname: Tu
authors.forename: Ying-Chan
authors.initials: YC
authors.lastname: Hsu
authors.forename: Jiann T
authors.initials: JT
authors.lastname: Lin