Journal
ELECTROCHIMICA ACTA
Volume 54, Issue 18, Pages 4365-4370Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2009.03.006
Keywords
Dye-sensitized solar cell; Stability; Silane-substituted benzimidazolium iodide; Gel electrolyte; Hydrogen bond
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Funding
- MKE new and renewable energy RD [2006-N-PV12-P-05]
- Sol-Gel Innovation Project
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A novel ionic electrolyte, 3-(iodohexyl)-1-(3-(triethoxysilyl)propylcarbamoyl)-1H-benzo[d]imidazol-3-ium iodide (SSBI) was prepared through the reaction of N-[3-(triethoxy-4-silyl)propyl]-1H-benzimidazole-1-carboxamide with 1,6-diiodohexane for the quasi-solidification of the electrolytic solution of a dye-sensitized solar cell (DSSC). The SSB-containing electrolyte, the sol electrolyte, in a DSSC was converted to a gel by heating it at 60 degrees C for 30 min in an oven. The DSSC consisting of the gel electrolyte showed a solar-to-electricity conversion efficiency comparable to that of the cell with the reference liquid electrolyte, and consistently higher stability than that of the reference cell. The performances of the DSSCs containing the reference, sol and gel electrolytes were discussed by scanning electron microscopy (SEM), impedance and chronoamperometric measurements, ionic conductivity, and UV-vis absorption spectroscopy. (C) 2009 Elsevier Ltd. All rights reserved.
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