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Dicationic bis-imidazolium molten salts for efficient dye sensitized solar cells: Synthesis and photovoltaic properties

Authors :
Kasim Ocakoglu
Cihan Ozsoy
Siddik Icli
Ceylan Zafer
Source :
Electrochimica Acta. 54:5709-5714
Publication Year :
2009
Publisher :
Elsevier BV, 2009.

Abstract

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.

Details

ISSN :
00134686
Volume :
54
Database :
OpenAIRE
Journal :
Electrochimica Acta
Accession number :
edsair.doi.dedup.....1cf95423d7c9ff2d542fca769d2075e9
Full Text :
https://doi.org/10.1016/j.electacta.2009.05.016