The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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The Enhancement of the Performance of Dye Sensitized Solar Cells Using Nb2O5-TiO2 Compound

Nb2O5-TiO2 화합물을 이용한 염료감응형 태양전지의 성능 향상

  • 최석원 (부산대 공대 전자전기공학과) ;
  • 서현웅 (부산대 공대 전자전기공학과) ;
  • 손민규 (부산대 공대 전자전기공학과) ;
  • 김수경 (부산대 공대 전자전기공학과) ;
  • 홍나영 (부산대 공대 전자전기공학과) ;
  • 김희제 (부산대 공대 전자전기공학과) ;
  • 김종락 (한국철도시설공단 영남 본부)
  • Received : 2012.04.02
  • Accepted : 2012.07.24
  • Published : 2012.08.01
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Abstract

Niobium oxide ($Nb_2O_5$) has a strong chemical coherence and good electrical conductivity. Therefore, this material is helpful to enhance the performance of the dye sensitized solar cells (DSC) by improving the electron mobility. In this study, $Nb_2O_5$ was mixed with $TiO_2$ and this compound was applied to the DSC to improve its performance. As a result, the current density of the DSC using the $Nb_2O_5-TiO_2$ compound on the photoelectrode was increased, because the internal resistance concerned to the electron transfer in the photoelectrode of DSC was decreased. However, large amount of the $Nb_2O_5$ induces the decrease of the efficiency of the DSC because the surface area to attach dye molecules is decreased due to the large particle of $Nb_2O_5$. Therefore, it is important to optimize the mixture ratio of the $Nb_2O_5-TiO_2$ compound for maximizing the performance of the DSC. Finally, the most optimum performance of the DSC was shown in case of the $Nb_2O_5$ concentration of 10 wt% of the $Nb_2O_5-TiO_2$ compound.

Keywords

References

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