Journal
ELECTROCHIMICA ACTA
Volume 192, Issue -, Pages 521-528Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.02.004
Keywords
dye-sensitized solar cells; counter electrode; interfacial adhesion; mechanical stability; electrocatalytic activity
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Funding
- Talent Start-up Fund of China Three Gorges University [1113043]
- Research Foundation of Yichang Science and Technology Bureau [A15-302-a10]
- Natural Science Foundation of Hubei Province, China [2015CFB513]
- Foundation of Key Laboratory of New Building Energy and Building Efficiency, Guangxi Province, China [15-J-22-2]
- Foundation of Key Laboratory for UV-Emitting Materials and Technology of Ministry of Education [130026504]
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A facile method is developed to prepare NiCo2S4 counter electrode (CE) which is in-situ grown on SnO2:F transparent conductive glass (FTO) with mirror-like smooth surface. As demonstrated by analyses, the electrocatalytic activity, electrical conductivity and light reflectivity of the NiCo2S4 CE exceed or approach to those of Pt-sputtering CE, and are much better than those of Pt-pyrolysis CE. Thus the conversion efficiency (eta) of the dye sensitized solar cell (DSSC, 8.10%) based on NiCo2S4 CE is higher than the cell based on Pt-sputtering CE (7.60%), and is superior to the one based on Pt-pyrolysis CE (7.01%). Remarkably, NiCo2S4 CE also exhibits excellent chemical and mechanical stability. There are almost no changes on morphology and interfacial adhesion between NiCo2S4 film and FTO substrate after sequential 1000-time scans of cyclic voltammetry and 100 cycles of 3 M Scotch tape detachment. The eta of DSSC drops a little from 8.10% to 7.94%. The numerous superiorities of the Pt-sputtering-like NiCo2S4 CE permit its promising application in DSSCs. (C) 2016 Elsevier Ltd. All rights reserved.
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