TiO2 nanotubes decorated with ZnO rod-like nanostructures for efficient dye-sensitized solar cells

Title
TiO2 nanotubes decorated with ZnO rod-like nanostructures for efficient dye-sensitized solar cells
Authors
김석순나석인나윤채
Keywords
Dye-sensitized solar cells; TiO2 nanotubes; Anodization; ZnO rod-like nanostructure; Hydrothermal synthesis
Issue Date
2011-12
Publisher
Electrochimica acta
Citation
VOL 58, 503-509
Abstract
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%.
URI
http://pubs.kist.re.kr/handle/201004/41177
ISSN
0013-4686
Appears in Collections:
KIST Publication > Article
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