T. Ryu, Myungkwan Song, Myungjin Lee
2009
Citations
0
Influential Citations
7
Citations
Journal
Bulletin of The Korean Chemical Society
Abstract
2 = (E)-3-(5'-hexyl-2,2'-bithiophen-5- yl)-2-(4'-methyl-2,2'-bipyridin-4-yl)acrylonitrile, and Ru-T3: L 3 = (E)-3-(5"-hexyl-2,2':5',2"-terthiophen-5-yl)-2- (4'-methyl-2,2'-bipyridin-4-yl)acrylonitrile)), were synthesized and used as photosensitizers in nanocrystalline dye- sensitized solar cells (DSSCs). The introduction of the 3-(5-hexyloligothiophen-5-yl)acrylonitrile group increased the conjugation length of the bipyridine donor ligand and thus improved their molar absorption coefficient and light harvesting efficiency. DSSCs with the configuration of SnO2: F/TiO2/ruthenium dye/liquid electrolyte/Pt devices were fabricated using these Ru-T1∼T3 as a photosensitizers. Among the devices, the DSSCs composed of Ru-T2 exhibited highest power conversion efficiency (PCE) of 2.84% under AM 1.5 G illumination (100 mW/cm 2 ).