NDLI: Effect of single-wall carbon nanotubes on the properties of polymeric gel electrolyte dye-sensitized solar cells

Content Provider	Springer Nature Link
Author	Mozaffari, Samaneh Dehghan, Mohsen Borhanizarandi, Mahmood Nateghi, Mohamad Reza
Copyright Year	2013
Abstract	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−/I3 − 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 TiO2 conduction band. Charge transport resistances at the TiO2/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 (I3 −) 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.
Starting Page	655
Ending Page	663
Page Count	9
File Format	PDF
ISSN	14328488
Journal	Journal of Solid State Electrochemistry
Volume Number	18
Issue Number	3
e-ISSN	14330768
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-11-10
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dye-sensitized solar cell Gel electrolyte Single-wall carbon nanotube Charge transport resistances Physical Chemistry Electrochemistry Energy Storage Characterization and Evaluation of Materials Analytical Chemistry Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry

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