Trialkylsulfonium and tetraalkylammonium cations-based ionic liquid electrolytes for quasi-solid-state dye-sensitized solar cells
Journal
Electrochimica Acta
Journal Volume
114
Pages
303-308
Date Issued
2013
Author(s)
Abstract
Seven ionic liquids (ILs) based on asymmetric trialkyl sulfonium and tetraalkylammonium cations with bis(trifluoromethanesulfonyl)imide anion were prepared and characterized. Physico-chemical and electrochemical properties of these ionic liquids including density, decomposition temperature, viscosity and conductivity were determined. The photovoltaic parameters of dye-sensitized solar cells (DSSCs) containing these sulfonium and ammonium ion-based ILs were compared. Among these two groups of ILs, the DSSCs with sulfonium cation-based ILs show higher cell efficiencies than that of ammonium counterpart due to lower charge transfer resistance exhibited by the former when compared to the latter, as confirmed by electrochemical impedance spectroscopy (EIS). The best cell efficiency achieved in this work was 4.61%. Moreover, long-term durability of the quasi-solid-state DSSCs at 50 C was investigated. © 2013 Elsevier Ltd. All rights reserved.
Subjects
Dye-sensitized solar cells; Electrochemical impedance spectroscopy; Ionic liquid; Long-term durability
SDGs
Other Subjects
Bis(trifluoromethane sulfonyl)imide; Charge transfer resistance; Decomposition temperature; Dye-Sensitized solar cell; Dye-sensitized solar cells; Ionic liquid electrolytes; Long-term durabilities; Quasi-Solid-State dye-sensitized solar cells; Durability; Electrochemical impedance spectroscopy; Photoelectrochemical cells; Positive ions; Solar cells; Spectroscopy; Ionic liquids
Type
journal article