Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Development of Highly Efficient Dye-Sensitized Solar Cells Using ZnO Post-Treated TiO2 Photoelectrodes

ZnO로 후처리된 TiO2 광전극을 이용한 고효율의 염료감응형 태양전지의 개발

  • PARK, JUN-YONG (Department of Environmental Engineering, Kumoh National Institute of Technology) ;
  • YUN, BYEONG-RO (Department of Environmental Engineering, Kumoh National Institute of Technology) ;
  • KIM, TAE-OH (Department of Environmental Engineering, Kumoh National Institute of Technology)
  • 박준용 (금오공과대학교 환경공학과) ;
  • 윤병로 (금오공과대학교 환경공학과) ;
  • 김태오 (금오공과대학교 환경공학과)
  • Received : 2017.07.24
  • Accepted : 2017.08.30
  • Published : 2017.08.30
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Abstract

In this study, an efficient dye-sensitive solar cells (DSSC) was developed after post-treatment of ZnO on $TiO_2$ photoelectrode. The $TiO_2$ electrode with ZnO post treatment was prepared with Titanium isoporopoxide in Zinc Nitrate Hexahydrate aqueous solution by incineration for 30 min at $450^{\circ}C$. The ZnO-post treated $TiO_2$ electrode showed strong dispersion force between particles in relation to the control $TiO_2$, referring high specific surface area and dye-adsorption rate. Proper addition of ZnO enhanced electron mobility and reduced internal resistance and electron recombination. Light conversion efficiency of DSSCs containing the ZnO-posttreated $TiO_2$ electrode increased 35.4% when compared to the DSSCs using $TiO_2$ electrode. It is similar to the DSSCs with $TiCl_4$ post treatment $TiO_2$ electrode. Increasing of light conversion efficiency was due to high specific surface area and dispersion force, and low dye-adsorption rate and electron recombination. Taken together, ZnO may be used as posttreatment of photoelectrode and replaced $TiCl_4$ that has high toxicity and causticity.

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References

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