10.1021/ic1009658.s001 Jeum-Jong Kim Jeum-Jong Kim Kimin Lim Kimin Lim Hyunbong Choi Hyunbong Choi Shengqiang Fan Shengqiang Fan Moon-Sung Kang Moon-Sung Kang Guohua Gao Guohua Gao Hong Seok Kang Hong Seok Kang Jaejung Ko Jaejung Ko New Efficient Ruthenium Sensitizers with Unsymmetrical Indeno[1,2<i>-b</i>]thiophene or a Fused Dithiophene Ligand for Dye-Sensitized Solar Cells American Chemical Society 2010 stability voltage JK electrolyte ligand density sensitizer methoxypropionitrile Solar factor New Efficient Ruthenium Sensitizers propyl 0.1 M Indeno 18.60 1000 h CellsTwo acetonitrile wt 0.05 M unsymmetrical dimethyl poly dithiophene unit mA iodide ruthenium 0.5 Unsymmetrical conversion efficiency Fused Dithiophene Ligand photocurrent 0.6 photovoltaic performance LiI 0.72 V 0.05 M guanidinium thiocyanate indeno cell exhibits 2010-09-20 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/New_Efficient_Ruthenium_Sensitizers_with_Unsymmetrical_Indeno_1_2_i_b_i_thiophene_or_a_Fused_Dithiophene_Ligand_for_Dye_Sensitized_Solar_Cells/2728525 Two novel ruthenium sensitizers containing unsymmetrical indeno[1,2<i>-b</i>]thiophene or a fused dithiophene unit in the ancillary ligand have been designed and synthesized. The photovoltaic performance of <b>JK-188</b> using an electrolyte consisting of 0.6 M 1,2-dimethyl-3-propylimidazolium iodide, 0.05 M I<sub>2</sub>, 0.1 M LiI, 0.05 M guanidinium thiocyanate, and 0.5 M <i>tert</i>-butylpyridine in acetonitrile revealed a short-circuit photocurrent density of 18.60 mA/cm<sup>2</sup>, an open-circuit voltage of 0.72 V, and a fill factor of 0.71, yielding an overall conversion efficiency of 9.54%. The cell exhibits a remarkable stability under 1000 h of light soaking at 60 °C using a quasi-solid-state electrolyte consisting of 5 wt % poly(vinylidenefluoride-<i>co</i>-hexafluoropropylene), 0.6 M 1-propyl-2,3-dimethylimidazolium iodide, 0.5 M <i>N</i>-methylbenzimidazole, and 0.1 M I<sub>2</sub> in 3-methoxypropionitrile, retaining 97% of the initial efficiency (7.38%).