TiO2 nanotubes decorated with ZnO rod-like nanostructures for efficient dye-sensitized solar cells
- TiO2 nanotubes decorated with ZnO rod-like nanostructures for efficient dye-sensitized solar cells
- 김석순; 나석인; 나윤채
- Dye-sensitized solar cells; TiO2 nanotubes; Anodization; ZnO rod-like nanostructure; Hydrothermal synthesis
- Issue Date
- Electrochimica acta
- VOL 58, 503-509
- To increase the efficiency of TiO2 nanotube-based dye-sensitized solar cells, we fabricated TiO2 nanotubes
and decorated them with ZnO rod-like nanostructures via anodization of Ti metal sheets followed by the
hydrothermal growth of ZnO. Compared to conventionally anodized nanotubes, the modified nanotubes
provided a higher specific surface area for dye adsorption. Besides increased dye adsorption, suppression
of the recombination of photo-induced electrons at the electrode/electrolyte interface was observed in
the modified nanotube-based systems because of the existence of a ZnO thin layer on the surface of
nanotubes. This thin layer was applied as a seed for an oriented growth of ZnO. Dye-sensitized solar cells
based on TiO2 nanotubes decorated with ZnO rod-like nanostructures showed a higher power conversion
efficiency of 3.84%, compared to standard nanotube devices with an efficiency of 2.06%.
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