Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Study of Enhanced Photovoltaic Performance with Optimized Electrolytes and Blocking Layer Formation

차단막 형성과 전해질의 최적화에 의한 광전변환 효율 개선 연구

  • 박희대 (경성대학교 대학원) ;
  • 주봉현 (경성대학교 대학원 전기전자공학과) ;
  • 성열문 (경성대학교 전기공학과)
  • Received : 2012.11.26
  • Accepted : 2013.02.26
  • Published : 2013.03.31
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Abstract

In this work, the effects of blocking layer and optimally fabricated electrolyte were investigated with respect to impedance and conversion efficiency of the cells.A layer of $TiO_2$ less than ~200nm in thickness, as a blocking layer, was deposited by rf sputtering onto the F:$SnO_2$ (FTO) glass to be isolated from the electrolyte in dye-sensitized solar cells (DSCs). Also, optimum condition of electrolytes preparation for DSCs was investigated. 3-methoxyppropionitrie and redox pairs with LiI and $I_2$ were used as solvents for fabrication of electrolyte. The electrochemical impedances of DSCs using this photo-anode were $R_1$: 13.8, $R_2$: 15.1, $R_3$: 11.9 and $R_h$: $8.3{\Omega}$, respectively. The $R_2$ impedance related by electron transportation from porous $TiO_2$ to FTO showed lower than that of normal DSCs. The photo-conversion efficiency of prepared DSCs was 6.4% and approximately 1.3% higher than general one.

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References

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