Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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The Study on the Cell Electrochemical Properties with Increasing Water content in Dye-Sensitized Solar cells

염료 감응형 태양전지에서 수분의 함량에 따른 셀의 전기 화학적 특성 연구

  • Seo, Hyun Woo (Department of Materials science and Engineering, Hongik University) ;
  • Kim, Dong Min (Department of Materials science and Engineering, Hongik University)
  • 서현우 (홍익대학교 재료공학부) ;
  • 김동민 (홍익대학교 재료공학부)
  • Received : 2014.04.10
  • Accepted : 2014.06.30
  • Published : 2014.06.30
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Abstract

Here, we have studied the effect of water added electrolyte on the photovoltaic performance of dye-sensitized solar cells (DSSCs). It was found that open-circuit voltage ($V_{oc}$) increased and short-circuit current density ($j_{sc}$) decreased with the increase of the amount of added water in the electrolyte of the DSSCs. Electrochemical impedance spectroscopy (EIS) study showed that the electrolyte with added water shifted the dye loaded $TiO_2$ conduction band upward that eventually increased $V_{oc}$ of the cells. On the other hand, the upward shift of $TiO_2$ conduction band decreased the driving force for the electron injection from the lowest unoccupied molecular orbital (LUMO) of the dye molecules to the conduction band of $TiO_2$ that resulted in decreased $j_{sc}$.

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References

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