Influence of Nanostructured TiO2 Electrode Fabricated with Acid-treated Paste on the Photovoltaic Efficiency of Dye-Sensitized Solar Cells

산처리된 페이스트로 제조한 나노 구조체 TiO2 전극이 염료감응형 태양전지의 효율에 미치는 영향

  • Lee, Jae-Wook (Department of Environmental and Chemical Engineering, Seonam University) ;
  • Hwang, Kyung-Jun (Department of Chemical and Biochemical Engineering, Chosun University) ;
  • Roh, Sung-Hee (Department of Environmental and Chemical Engineering, Seonam University) ;
  • Kim, Sun-Il (Department of Environmental and Chemical Engineering, Seonam University)
  • 이재욱 (서남대학교 환경화학공학과) ;
  • 황경준 (조선대학교 생명화학공학과) ;
  • 노성희 (서남대학교 환경화학공학과) ;
  • 김선일 (서남대학교 환경화학공학과)
  • Received : 2007.05.18
  • Accepted : 2007.07.03
  • Published : 2007.08.10

Abstract

Recently, dye sensitized solar cells (DSSCs) composed of nanoporous $TiO_2$, light-sensitive dyes, electrolytes, and counter electrode have been received much attention. Nanostructured particles with higher surface area for the higher adsorption of Ru (II) dye are required to increase the quantity of light absorption. Also, it has been reported that the key factor to achieve high energy conversion efficiency in the photoelectrode of DSSC is the heat treatment of $TiO_2$ paste with acid addition. In this work, we investigated the influence of acid treatment of $TiO_2$ solar cell on the photovoltaic performance of DSSC. The working electrodes fabricated in this work were characterized by X-ray photoelectron spectroscopy (XPS), extended X-ray absorption fine structure (EXAFS), field emission scanning electron microscope (FE-SEM), and atomic force microscope (AFM). In addition, the influence of nanostructured photoelectrode fabricated with the acid-treated paste on the energy conversion efficiency was investigated on the basis of photocurrent-potential curves. It was found that the influence of acid-treated paste on the photovoltaic efficiency was significant.

Keywords

dye-sensitized solar cells;$TiO_2$;acid treatment;photoelectrode;I-V curves

Acknowledgement

Supported by : 조선대학교

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