Applications of Crosslinkable Ruthenium Complex and Its Crosslinker on Dye-sensitized Solar Cells
Date Issued
2010
Date
2010
Author(s)
Ko, Chih-Yang
Abstract
We synthesized the crosslinkable ruthenium complex with styryl groups attached on the bipyridine ligand, denoted as Ru-S which was characterized by NMR, IR, and UV-Vis spectroscopies. Its stability after crosslinking and copolymerization with Glycerol propoxylate triacrylate(GPTA) were measured by UV-Vis spectroscopy. By using the MPN based liquid electrolyte, the efficiency of DSSCs crosslinking with proper amounts GPTA increased from 7.53% to 7.88%. However, using the PMA-gelled electrolyte system, the device performance was raised from 6.96% to 7.57%. On the other hands, the DSSC with GPTA-crosslinked Ru-S dye and with various Li+ concentrations in liquid electrolytes were studied. At low Li+ concentration, the efficiency was increased with the content of Li+. However, at high Li+ concentration, although the short current was slightly increased with the content of Li+ but the Voc was decreased, leading to lower power efficiency. The Li+-coordination capability of Ru-S was then investigated by IR spectroscopy, which was used to explain the slow decreasing trend of Voc as the Li+ concentration was increased in the electrolyte system.
Subjects
solar cells
ruthenium complex
power conversion efficiency
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