摘要:
Two series of novel ruthenium bipyridyl sensitizers incorporating conjugated dipyridylamine ligands with general formula [Ru (dcbpy) (L) (NCS)(2), where dcbpy is 4,40-dicarboxylic acid-2,2'-bipyridine and L is N-hexyl-4,4'-di(4-hexylstyryl)-2,2'-dipyridylamine, JJ-95 or N-hexyl-4,4'-di{(5-hexylthiophen-2-yl) vinyl}-2,2'-dipyridylamine, JJ-99] have been synthesized and demonstrated as efficient sensitizers in dye-sensitized solar cells. A mesoporous titania film stained with JJ-99 exhibits a remarkable incident monochromatic photon-to-current conversion efficiency of 84%. Under standard AM 1.5 sunlight, the solar cell using a liquid-based electrolyte exhibits a short-circuit photocurrent density of 18.89 mA/cm(2), an open-circuit voltage of 0.66 V, and a fill factor of 0.69, corresponding to an overall conversion efficiency of 8.76%. (C) 2012 Elsevier B.V. All rights reserved.