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Electrochemical Investigation of High-Performance Dye-Sensitized Solar Cells Based on Molybdenum for Preparation of Counter Electrode

Title
Electrochemical Investigation of High-Performance Dye-Sensitized Solar Cells Based on Molybdenum for Preparation of Counter Electrode
Authors
Sim, KyoseungSung, Shi-JoonJo, Hyo JeongJeon, Dong-HwanKim, Dae-HwanKang, Jin-Kyu
DGIST Authors
Sung, Shi-Joon; Kim, Dae-HwanKang, Jin-Kyu
Issue Date
2013-06
Citation
International Journal of Electrochemical Science, 8(6), 8272-8281
Type
Article
Article Type
Article
Keywords
Counter ElectrodeDye-Sensitized Solar Cells (DSCs)Electrocatalytic ActivityElectrochemical AnalysisMolybdenum
ISSN
1452-3981
Abstract
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.
URI
http://hdl.handle.net/20.500.11750/5313
Publisher
Environmental, Social and Governance
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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