title: Improvement of TiO2/dye/electrolyte interface conditions by positional change of alkyl chains in modified panchromatic Ru complex dyes.
abstract: A series of panchromatic ruthenium sensitizers (MJ sensitizers) with attached thiophene and phenyl units bearing alkyl chains was synthesized. A new synthetic route was used to examine all possible positions for the alkyl chains. The absorption spectra showed the sum of a ruthenium complex and peripheral organic chromophore units. The hypochromic effect and blueshift of the metal-to-ligand charge-transfer band observed in the modified ruthenium sensitizers were suppressed by changing the positions of the alkyl chains on the attached thiophene ring. Changing only one alkyl chain also influenced the performance of dye-sensitized solar cells. Ruthenium sensitizer MJ-10 with bulky substituent harvests visible and near-infrared light, and solar cells sensitized by MJ-10 exhibit an efficiency of 9.1% under 1 sun irradiation.
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: Junya
authors.initials: J
authors.lastname: Masuo
authors.forename: Yuki
authors.initials: Y
authors.lastname: Tohata
authors.forename: Kazumichi
authors.initials: K
authors.lastname: Obuchi
authors.forename: Naruhiko
authors.initials: N
authors.lastname: Masaki
authors.forename: Takurou N
authors.initials: TN
authors.lastname: Murakami
authors.forename: Nagatoshi
authors.initials: N
authors.lastname: Koumura
authors.forename: Kojiro
authors.initials: K
authors.lastname: Hara
authors.forename: Atsushi
authors.initials: A
authors.lastname: Fukui
authors.forename: Ryohsuke
authors.initials: R
authors.lastname: Yamanaka
authors.forename: Shogo
authors.initials: S
authors.lastname: Mori
mesh_terms: D004396:Coloring Agents / Q000138:chemical synthesis / Q000737:chemistry*; D004573:Electrolytes / Q000737:chemistry; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D004573:Electrolytes; D009942:Organometallic Compounds; C009495:titanium dioxide; D012428:Ruthenium; D014025:Titanium