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Effect of Salt Concentration on Electrolyte Membranes for Dye Sensitized Solar Cells  

Kwon, So-Young (Department of Applied Chemical Engineering, Korea University of Technology and Education)
Yun, Mi-Hye (Department of Applied Chemical Engineering, Korea University of Technology and Education)
Cho, Doo-Hyun (Department of Applied Chemical Engineering, Korea University of Technology and Education)
Jung, Yoo-Young (Department of Applied Chemical Engineering, Korea University of Technology and Education)
Koo, Ja-Kyung (Department of Applied Chemical Engineering, Korea University of Technology and Education)
Publication Information
Membrane Journal / v.21, no.3, 2011 , pp. 213-221 More about this Journal
Abstract
Using poly(ethylene oxide) (PEO) as a polymer host, poly(ethylene glycol) (PEG) as a plasticizer, potassium iodide and iodine as sources of $I^-/I_3^-$, polymer electrolyte membranes were prepared. Based on the polymer electrolytes, solid-state dye-sensitized solar cell (DSSC)s were fabricated. The content of PEG in the electrolyte was controlled to be 95%. The mole number of KI per 1 mole of EO ([KI]/[EO] ratio) in the electrolyte was changed to be 0.022, 0.044, 0.066 and 0.088. The electrolyte membrane showed wax phase in ambient temperature. The ionic conductivity increased with increasing KI content to reach the maximum value at which [KI]/[EO] ratio is 0.066. After the maximum value, the ionic conductivity decreased with increasing KI content. In the case of DSSC, the Voc decreased continuously with increasing KI content in the polymeric electrolyte membrane. The $J_{SC}$ increased with increasing KI content to show maximum value at which [KI]/[EO] ratio is 0.044. In the higher KI content region, $J_{SC}$ value decreased with increasing KI content.
Keywords
Polymer electrolyte membrane; ionic conductivity; diffusivity; open circuit voltage; short circuit current;
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Times Cited By KSCI : 7  (Citation Analysis)
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