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

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Title
Electrochemical Investigation of High-Performance Dye-Sensitized Solar Cells Based on Molybdenum for Preparation of Counter Electrode
Author
Sim, KyoseungSung, Shi-JoonJo, Hyo JeongJeon, Dong-HwanKim, Dae-HwanKang, Jin-Kyu
Issue Date
2013-06
Publisher
ESG
Citation
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE, v.8, no.6, pp.8272 - 8281
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/cm(2), AM 1.5), we determined that the fill factor (FF) and photocurrent conversion efficiency (eta) 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.
URI
https://scholarworks.unist.ac.kr/handle/201301/31601
URL
http://www.electrochemsci.org/list13.htm#issue6
ISSN
1452-3981
Appears in Collections:
SNS_Journal Papers
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