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

Authors
Choi, JongwanKim, Felix Sunjoo
Issue Date
Mar-2018
Publisher
KOREAN PHYSICAL SOC
Keywords
Dye-sensitized solar cells; Photoanode thickness; Ruthenium dye; Impedance spectroscopy
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.72, no.5, pp 639 - 644
Pages
6
Journal Title
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
Volume
72
Number
5
Start Page
639
End Page
644
URI
https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/1131
DOI
10.3938/jkps.72.639
ISSN
0374-4884
1976-8524
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 mu m to 14.8 mu m, 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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