Effect of single-wall carbon nanotubes on the properties of polymeric gel electrolyte dye-sensitized solar cells
Journal of Solid State Electrochemistry, ISSN: 1432-8488, Vol: 18, Issue: 3, Page: 655-663
2014
- 18Citations
- 9Captures
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Article Description
A hybrid of polymer/dispersed single-wall carbon nanotubes was utilized in networking a novel composition of gel electrolyte in dye-sensitized solar cells. The gel is composed of polyethylene glycol, polyvinyl pyrrolidone, single-wall carbon nanotubes, and I/I as electrolyte. Formation of the less conductive polyiodide species in electrolyte was prohibited by the addition of single-wall carbon nanotubes leading to the excellent photovoltaic behavior of the cell under simulated standard illumination of the fabricated device owing to the increased open circuit voltage (0.47 V). Electrochemical impedance spectroscopy was employed to quantify the charge transport resistance and the electron lifetime at the TiO conduction band. Charge transport resistances at the TiO /dye/electrolyte interface were determined for the cells consisting of the non-gel reference and our new gel electrolytes, and it was indicated that the charge recombination between injected electrons and electron acceptors (I) in the redox electrolyte was remarkably retarded. Electrochemical parameters obtained by the fitting showed all of the resistances increased as compared to liquid electrolyte dye-sensitized solar cells that can be related to the increase in viscosity of the gel, which hinders the ionic transportation through the electrolyte. These results were also confirmed by the electron lifetime analyses. The characteristic peak shifted to a lower frequency in the Bode phase plot for the cell containing gel electrolyte which is an indication of a longer electron lifetime in comparison with that of the cell containing very conventional liquid electrolyte. © 2013 Springer-Verlag Berlin Heidelberg.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84897612624&origin=inward; http://dx.doi.org/10.1007/s10008-013-2302-1; http://link.springer.com/10.1007/s10008-013-2302-1; http://link.springer.com/content/pdf/10.1007/s10008-013-2302-1; http://link.springer.com/content/pdf/10.1007/s10008-013-2302-1.pdf; http://link.springer.com/article/10.1007/s10008-013-2302-1/fulltext.html
Springer Science and Business Media LLC
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