TY - JOUR
T1 - Novel ruthenium sensitizers having different numbers of carboxyl groups for dye-sensitized solar cells
T2 - Effects of the adsorption manner at the TiO 2 surface on the solar cell performance
AU - Ozawa, Hironobu
AU - Sugiura, Takahito
AU - Shimizu, Ryosuke
AU - Arakawa, Hironori
PY - 2014/9/2
Y1 - 2014/9/2
N2 - Two novel ruthenium sensitizers having multiple carboxyl groups ((TBA)[Ru{4′-(3,4-dicarboxyphenyl)-4,4″-dicarboxyterpyridine}(NCS) 3] (TUS-21) and (TBA)[Ru{4′-(3-carboxyphenyl)-4,4″- dicarboxyterpyridine}(NCS)3] (TUS-37); TBA = tetrabutylammonium) have been synthesized as improved model sensitizers for the previously reported ruthenium sensitizer TUS-20 ((TBA)[Ru{4′-(3,4-dicarboxyphenyl)terpyridine} (NCS)3]). The absorption maxima of two MLCT bands and the absorption onsets of TUS-21 and TUS-37 were shifted to longer wavelengths of about 30 nm in comparison to those of TUS-20 by introducing a carboxyl group to the each terminal pyridine ring of the terpyridine ligand. TUS-21 and TUS-37 showed quite similar adsorption behaviors to the TiO2 surface, and this adsorption behavior was found to be different from that of TUS-20. ATR-IR measurements revealed that TUS-21 and TUS-37 bind to the TiO2 surface by using two carboxyl groups at the 3-position of the phenyl ring and at one of the terminal pyridine rings of the terpyridine ligand, while TUS-20 is reported to bind by using two carboxyl groups at the 3,4-dicarboxyphenyl unit. The dye-sensitized solar cell (DSC) with TUS-21 exhibited 10.2% conversion efficiency, which is much higher than that of the DSC with TUS-20 (7.5%), under AM 1.5 (100 mW/cm2) irradiation.
AB - Two novel ruthenium sensitizers having multiple carboxyl groups ((TBA)[Ru{4′-(3,4-dicarboxyphenyl)-4,4″-dicarboxyterpyridine}(NCS) 3] (TUS-21) and (TBA)[Ru{4′-(3-carboxyphenyl)-4,4″- dicarboxyterpyridine}(NCS)3] (TUS-37); TBA = tetrabutylammonium) have been synthesized as improved model sensitizers for the previously reported ruthenium sensitizer TUS-20 ((TBA)[Ru{4′-(3,4-dicarboxyphenyl)terpyridine} (NCS)3]). The absorption maxima of two MLCT bands and the absorption onsets of TUS-21 and TUS-37 were shifted to longer wavelengths of about 30 nm in comparison to those of TUS-20 by introducing a carboxyl group to the each terminal pyridine ring of the terpyridine ligand. TUS-21 and TUS-37 showed quite similar adsorption behaviors to the TiO2 surface, and this adsorption behavior was found to be different from that of TUS-20. ATR-IR measurements revealed that TUS-21 and TUS-37 bind to the TiO2 surface by using two carboxyl groups at the 3-position of the phenyl ring and at one of the terminal pyridine rings of the terpyridine ligand, while TUS-20 is reported to bind by using two carboxyl groups at the 3,4-dicarboxyphenyl unit. The dye-sensitized solar cell (DSC) with TUS-21 exhibited 10.2% conversion efficiency, which is much higher than that of the DSC with TUS-20 (7.5%), under AM 1.5 (100 mW/cm2) irradiation.
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U2 - 10.1021/ic501479p
DO - 10.1021/ic501479p
M3 - Article
AN - SCOPUS:84906871587
SN - 0020-1669
VL - 53
SP - 9375
EP - 9384
JO - Inorganic chemistry
JF - Inorganic chemistry
IS - 17
ER -