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

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...

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Bibliographic Details
Published in:Journal of the Korean Physical Society 2018, 72(5), , pp.639-644
Main Authors: Choi, Jongwan, Kim, Felix Sunjoo
Format: Article
Language:English
Subjects:
Carbazoles
Dye-sensitized solar cells
Dyes
Electrochemical impedance spectroscopy
Mathematical and Computational Physics
Particle and Nuclear Physics
Photoanodes
Photovoltaic cells
Physics
Physics and Astronomy
Ruthenium
Theoretical
물리학
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Summary: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.
ISSN:0374-4884
1976-8524
DOI:10.3938/jkps.72.639