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High-Performance Cobalt Selenide and Nickel Selenide Nanocomposite Counter Electrode for Both Iodide/Triiodide and Cobalt(II/III) Redox Couples in Dye-Sensitized Solar Cells.
- Source :
- Chinese Journal of Chemistry; Jun2014, Vol. 32 Issue 6, p491-497, 7p
- Publication Year :
- 2014
-
Abstract
- The nanocomposites of cobalt selenide and nickel selenide (Co<subscript>0.85</subscript>Se/Ni<subscript>0.85</subscript>Se) were successfully fabricated on FTO glass by a facile co-electrodeposition method at ambient temperature. Nanocomposite films were used as electrocatalysts in dye-sensitized solar cell counter electrodes for regeneration of both iodide/triiodide and cobalt(II/III) redox couples. Co<subscript>0.85</subscript>Se/Ni<subscript>0.85</subscript>Se were mainly composed of nanoflakes and nanoparticles. It is noted that such nanostructure generated by nanoparticles embedded with 2D nanoflakes led to high active sites and was accessible to cobalt(II/III) electrolyte, delivering better catalytic activity for the reduction of larger volume cobalt(II/III). As a result, for cobalt(II/III) electrolyte, the Co<subscript>0.85</subscript>Se/Ni<subscript>0.85</subscript>Se based dye-sensitized solar cell performed significantly improved efficiency than that of Pt and Co<subscript>0.85</subscript>Se. Meanwhile, the Co<subscript>0.85</subscript>Se/Ni<subscript>0.85</subscript>Se based dye-sensitized solar cell held comparable energy conversion efficiency to that of Pt and Co<subscript>0.85</subscript>Se for iodide/triiodide electrolyte. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1001604X
- Volume :
- 32
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Chinese Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 96700287
- Full Text :
- https://doi.org/10.1002/cjoc.201400003