Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Application of Metal Oxide Nanofiber for Improving Photovoltaic Properties of Dye-Sensitized Solar Cells

염료감응형 태양전지의 광전기적 특성 개선을 위한 금속산화물 나노파이버의 응용

  • Dong, Yong Xiang (Department of Chemical Engineering, Chungbuk National University) ;
  • Jin, En Mei (Department of Chemical Engineering, Chungbuk National University) ;
  • Jeong, Sang Mun (Department of Chemical Engineering, Chungbuk National University)
  • 동영상 (충북대학교 화학공학과) ;
  • 김은미 (충북대학교 화학공학과) ;
  • 정상문 (충북대학교 화학공학과)
  • Received : 2018.07.16
  • Accepted : 2018.07.24
  • Published : 2018.09.28
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Abstract

In order to improve the photo conversion efficiency (${\eta}$) of dye-sensitized solar cells (DSSCs), the electrospun $TiO_2$, $SiO_2$, $ZrO_2$ and $SnO_2$ nanofibers were added into the hydrothermally prepared $TiO_2$ nanoparticles for application to a photoelectrode for DSSCs. The $TiO_2$ nanofiber added photoelectrode exhibited a higher photo current density ($J_{sc}$) compared to the bare $TiO_2$ nanoparticles, which is caused from acceleration of the transfer of excited electron from dye molecule due to the nanofiber structure. The DSSCs with $SiO_2$ nanofibers shows a higher open circuit voltage ($V_{oc}$) of 0.67 V and the highest photo conversion efficiency was found to be 6.24%.

염료감응형 태양전지의 광전변환효율(${\eta}$) 향상을 위하여 수열합성한 $TiO_2$ 나노입자에 전기방사한 $TiO_2$, $SiO_2$, $ZrO_2$ 및 $SnO_2$ 나노파이버를 첨가하여 광전극에 적용하였다. $TiO_2$ 나노파이버를 첨가한 염료감응형 태양전지는 순수한 $TiO_2$ 나노입자에 비해 높은 전류밀도($J_{sc}$)를 나타내었고 이것은 나노파이버 구조로 인하여 염료에서 여기된 전지의 전달 특성이 용이하여 나타난 현상으로 생각된다. 또한 $SiO_2$ 나노파이버를 첨가한 염료감응형 태양전지의 경우, 순수한 $TiO_2$ 나노입자를 이용한 것에 비해 보다 높은 0.67 V의 개방전압($V_{oc}$)을 나타내었고 에너지 변환효율 또한 6.24%로 가장 높게 나타났다.

Keywords

References

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