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Photoanode Thickness Optimization and Impedance Spectroscopic Analysis of Dye-Sensitized Solar Cells based on a Carbazole-Containing Ruthenium Dye

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Abstract

We studied the influence of photoanode thickness on the photovoltaic characteristics and impedance responses of the dye-sensitized solar cells based on a ruthenium dye containing a hexyloxyl-substituted carbazole unit (Ru-HCz). As the thickness of photoanode increases from 4.2 μm to 14.8 μm, the dye-loading amount and the efficiency increase. The device with thicker photoanode shows a decrease in the efficiency due to the higher probability of recombination of electron-hole pairs before charge extraction. We also analyzed the electron-transfer and recombination characteristics as a function of photoanode thickness through detailed electrochemical impedance spectroscopy analysis.

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Authors and Affiliations

  1. Department of Chemistry and Smith Liberal Arts College, Sahmyook University, Seoul, 01795, Korea

    Jongwan Choi

  2. School of Chemical Engineering and Materials Science, Chung-Ang University, Seoul, 06974, Korea

    Felix Sunjoo Kim

Authors
  1. Jongwan Choi
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  2. Felix Sunjoo Kim
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Correspondence to Jongwan Choi.

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Choi, J., Kim, F.S. Photoanode Thickness Optimization and Impedance Spectroscopic Analysis of Dye-Sensitized Solar Cells based on a Carbazole-Containing Ruthenium Dye. J. Korean Phys. Soc. 72, 639–644 (2018). https://doi.org/10.3938/jkps.72.639

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  • DOI: https://doi.org/10.3938/jkps.72.639

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