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ETRI journal v.26 no.6, 2004년, pp.647 - 652  
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A New Ionic Liquid for a Redox Electrolyte of Dye-Sensitized Solar Cells

Kang, Man-Gu    (Basic Research Laboratory, ETRI   ); Ryu, Kwang-Sun    (Basic Research Laboratory, ETRI   ); Chang, Soon-Ho    (Basic Research Laboratory, ETRI   ); Park, Nam-Gyu    (Basic Research Laboratory, ETRI  );
  • 초록

    A new ionic liquid, 1-vinyl-3-heptylimidazolium iodide (VHpII), was synthesized and applied as a redox electrolyte for dye-sensitized solar cells. The chemical structure of the synthesized VHpII was confirmed using $^1H$ NMR. Thermogravimetric analysis showed that the VHpII was stable for thermal stress of up to $250^{\circ}C$ . The energy conversion efficiencies of the VHpII-based dye-sensitized solar cells were investigated in terms of the effect of a lithium iodide addition. A solar cell containing the redox couple of VHpII and iodine showed a conversion efficiency of 2.63% under 1 sun light intensity at AM 1.5. Adding 0.4 M LiI results in a conversion efficiency of 3.63%, which was an improvement of about 40%. The increased conversion efficiency was ascribed to an increase in external quantum efficiency.


  • 주제어

    Dye-sensitized solar cell .   ionic liquid .   1-vinyl-3-heptylimidazolium iodide .   molten salt .   redox electrolyte.  

  • 참고문헌 (22)

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