A high temperature stable electrolyte system for dye-sensitized solar cells |
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Authors: | Hak-Soo Lee Sang-Hoon Bae Kang-Jin Kim Chi-Hwan Han |
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Affiliation: | a Photovoltaic Research Center, Korea Institute of Energy Research, 71-2, Jangdong, Yuseong, Daejeon 305-343, Republic of Korea b Department of Chemistry, Korea University, Seoul 136-713, Republic of Korea c Interdisciplinary School of Green Energy, UNIST, Ulsan 689-798, Republic of Korea |
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Abstract: | The effect of the addition of single and binary additives to a mixed solvent, ethylene carbonate + γ-butyrolactone, on the performance of dye-sensitized TiO2 solar cells (DSSCs) has been investigated. The addition of a single additive, 2-(dimethylamino)-pyridine, to the electrolyte containing an ionic salt, 1,2-dimethyl-3-propylimidazolium iodide, in the mixed solvent results in an enhancement of the cell performance. The performance of the cell has been further enhanced by the addition of the second additive, 5-chloro-1-ethyl-2-methylimidazole. The resulting DSSC has performed better than the one based on the conventional electrolyte in acetonitrile. The dependence of the stability of the cells on the temperature has been evaluated over the range of 30-120 °C for outdoor applications. |
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Keywords: | Dye-sensitized solar cell Binary additive High temperature stability Ethylene carbonate γ-Butyrolactone |
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