Abstract
A heteroleptic polypyridyl ruthenium complex ‘cis-Ru(4,4′-bis(3,5-bis(5-hexylthiophen-2-yl)phenyl)-2,2′-bipyridine)(4,4′-dicarboxyl-2,2′-bipyridine) (NCS)2, MC102′, with a high molar extinction coefficient was synthesized and characterized with IR, 1H NMR, Mass, UV–Vis spectroscopy. The test cell DSSC devices constructed with 0.23cm2 active area photo-electrode in combination with an electrolyte composed of 0.6M dimethylpropyl-imidazolium iodide (DMPII), 0.05M I2, and 0.1M LiI in acetonitrile yielded solar to electric energy conversion efficiency (η) of 4.42% under Air Mass (AM) 1.5 sunlight, while the reference N719 sensitized solar cell fabricated and evaluated under similar conditions exhibited η-value of 5.84%.
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