期刊
ELECTROCHIMICA ACTA
卷 54, 期 24, 页码 5709-5714出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2009.05.016
关键词
Dye sensitized solar cells; Electrolyte; Ionic liquid; Imidazolium; Ethyleneoxide
资金
- European Commission [SES-CT-2003-502783]
- Scientific and Technical Research Council of Turkey (TUBITAK)
- State Planning Organization of Turkey (DPT)
- Alexander von Humboldt Foundation of Germany
New dicationic bis-imidazolium salts based ionic liquids were synthesized to develop new electrolytes to improve photovoltaic properties of dye sensitized solar cells. Various properties of electrolytes such as viscosities, ion diffusion coefficients, charge transfer resistances and photovoltaic properties were studied. Electrochemical impedance spectroscopy has been performed to investigate diffusion coefficients and charge transfer resistances. Influence of polarity and chain length on the photovoltaic performance, was investigated. A DSSC employing the K34 (butyl-1,4-bis(3-methylimidazolium iodide) gives an open-circuit voltage of 0.64 V, a short-circuit current of 17.11 mA/cm(2) and conversion efficiency of 5.60% under light intensity of 100 mW/cm(2) while the DSSC based on 1-butyl-3-methylimidazolium iodide which is a reference ionic liquid exhibited 5.64% efficiency due to the lowest viscosity, highest diffusion coefficient. (C) 2009 Elsevier Ltd. All rights reserved.
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