Synthesis of ruthenium complex and its application in dye-sensitized solar cells |
| |
Authors: | Hye-Kyung Song Young Ho Park Chi-Hwan Han Jong-Gi Jee |
| |
Affiliation: | 1. Department of Chemistry, Kyungpook National University, 1370 Sankyuk-dong, Buk-gu, Daegu 702-701, Republic of Korea;2. Department of Disaster Prevention Engineering, Jinju International University, Republic of Korea;3. Korea Institute of Energy Research, 71-2 Jang-Dong, Yusong-Gu, Daejeon 305-343, Republic of Korea |
| |
Abstract: | An amphiphilic bipyridyl ligand, 4,4′-dicarboxy-octyl-2,2′-bipyridine, and its ruthenium(□) complex (termed as S8) were synthesized and characterized by UV/Vis, IR and NMR spectroscopy. The performance of this S8 complex as charge transfer photo-sensitizer in TiO2-based dye-sensitized solar cells was studied under standard AM 1.5 sunlight and by using an electrolyte consisting of 0.70 M 1,2-dimethyl-3-propyl-imidazolium iodide, 0.10 M LiI, 40 mM iodine and 0.125 M 4-tert-butylpyridine in acetonitrile. Aliphatic chains linking to carboxylate groups of S8 act as an effective electron donor and carboxylate groups act as an effective electron withdrawing between the TiO2 layer and the carboxylate linking TiO2 layer leading to increasing of electron density at this interface, which is attributed to increasing efficiency of electron injection to the TiO2 conduction band from the excited state of dye. The complex, S8, gave a photocurrent density of 13.02 mA/cm2, 0.60 V open circuit voltage and 0.69 fill factor yielding 5.36% efficiency. The S8 dye with aliphatic chain improved conversion efficiency of the resulting DSSCs compared with a cell fabricated using the N3 dye. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|