Yin, JFJFYinKUO-CHUAN HO2018-09-102018-09-102009http://www.scopus.com/inward/record.url?eid=2-s2.0-70349515822&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/347895Two ruthenium sensitizers, [Ru(dcbpy)(opip)(NCS)2] (JF-1, dcbpy = 4,4′-dicarboxylic acid-2,2′-bipyridine, opip = 2-(4-octylphenyl)-1H-imidazo[4,5-f][1,10]phenanthroline) and [Ru(dcbpy)(otip)(NCS)2] (JF-2, otip = 2-(5-octylthiophen-2-yl)-1H- imidazo[4,5-f][1,10]phenanthroline), with unusually high power-conversion efficiency in comparison with other ruthenium complexes containing 1,10-phenanthroline-based ligands were designed. The power-conversion efficiency of JF-2 is 20% higher than that of JF-1, due to the modification of the ancillary ligand with a thiophene moiety. The origins of this device performance diversity are illustrated by photophysical properties, electrochemical data and density functional theory (DFT) studies. The greater device performance of JF-2 compared to JF-1 was caused from the broader MLCT distribution, the appropriate localization of the frontier orbitals and the stronger driving force of the charge injection and regeneration. © 2009 The Royal Society of Chemistry.[SDGs]SDG7Ancillary ligands; Bipyridines; Device performance; Dicarboxylic acid; Driving forces; Dye-Sensitized solar cell; Electrochemical data; Electronic localization; Frontier orbitals; High-power; Phenanthrolines; Photophysical properties; Photovoltaic performance; Power conversion efficiencies; Ruthenium complexes; Ruthenium sensitizers; Conversion efficiency; Electrochemical properties; Ligands; Photovoltaic cells; Ruthenium; Ruthenium compounds; Solar cells; Solar power generation; Thiophene; Density functional theoryjournal article10.1039/b905103a