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Electrochemical Investigation of High-Performance Dye-Sensitized Solar Cells Based on Molybdenum for Preparation of Counter Electrode
- Electrochemical Investigation of High-Performance Dye-Sensitized Solar Cells Based on Molybdenum for Preparation of Counter Electrode
- Sim, Kyoseung; Sung, Shi-Joon; Jo, Hyo Jeong; Jeon, Dong-Hwan; Kim, Dae-Hwan; Kang, Jin-Kyu
- DGIST Authors
- Sung, Shi-Joon; Kim, Dae-Hwan; Kang, Jin-Kyu
- Issue Date
- International Journal of Electrochemical Science, 8(6), 8272-8281
- Article Type
- Counter Electrode; Dye-Sensitized Solar Cells (DSCs); Electrocatalytic Activity; Electrochemical Analysis; Molybdenum
- In order to improve the photocurrent conversion efficiency of dye-sensitized solar cells (DSSCs), we studied an alternative conductor for the counter electrode and focused on molybdenum (Mo) instead of conventional fluorine-doped tin oxide (FTO). Because Mo has a similar work function to FTO for band alignment, better formability of platinum (Pt), and a low electric resistance, using a counter electrode made of Mo instead of FTO lead to the enhancement of the catalytic reaction of the redox couple, reduce the interior resistance of the DSSCs, and prevent energy-barrier formation. Using electrical measurements under a 1-sun condition (100 mW/cm2,, AM 1.5), we determined that the fill factor (FF) and photocurrent conversion efficiency (η) of DSSCs with a Mo electrode were respectively improved by 7.75% and 5.59% with respect to those of DSSCs with an FTO electrode. Moreover, we have investigated the origin of the improved performance through surface morphology analyses such as scanning electron microscopy and electrochemical analyses including cyclic voltammetry and impedance spectroscopy. © 2013 by ESG.
- Environmental, Social and Governance
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- Convergence Research Center for Solar Energy1. Journal Articles
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