Influence of donor moiety in ruthenium sensitizers on the properties of dye-sensitized solar cells.
Heteroleptic ruthenium complexes cis-[Ru(H2dcbpy)(L)(NCS)2], where H2dcbpy is 4,4'-dicarboxylic acid-2,2'-bipyridine and L is 4-(4-(N,N-di-(p-hexyloxyphenyl)-amino)styryl)-4'-methyl-2,2'-bipyridine (Rut-A) or 4-(4'-(3,6-dihexyloxycarbazole-9-yl)-styryl)-4'-methyl-2,2'-bipyridine (Rut-B), have been synthesized and characterized by NMR, UV-Vis spectroscopy, and cyclic voltammogram. The effect of different electron donors on the properties of dye-sensitized solar cells has been studied. The power conversion efficiency of DSSC based on Rut-B is 6.1% while Rut-A delivered a lower efficiency of 4.52% under the same device fabrication and measuring conditions. The better photovoltaic performance of Rut-B is mainly associated with enhanced dye absorptivity and charge recombination suppression.
Department of Chemistry and Research Institute for Natural Science, Hanyang University, 17-Haengdang-Dong, Seongdong-gu, Seoul 133-791, Korea.
Hong-Minh
HM
Nguyen
Jongwan
J
Choi
Ji Hyun
JH
Heo
Jin-Woo
JW
Oh
Duc-Nghia
DN
Nguyen
Nakjoong
N
Kim