Photoelectrochemical response from CdSe-sensitized anodic oxidation TiO2 nanotubes

Uniform TiO2 nanotube arrays were fabricated on titanium substrates by self-organized anodic oxidation. CdSe quantum dots (QDs) were assembled onto TiO2 nanotube layers, which serve as sensitizers. The photocurrent measurement shows that annealing is essential to increase the anatase phase and hence...

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Bibliographic Details
Published in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2008-02, Vol.313-314, p.604-607
Main Authors: Si, Hua-Yan, Sun, Zhen-Hong, Zhang, Hao-Li
Format: Article
Language:English
Subjects:
CdSe
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Quantum dot
Sensitizer
Solar cell
Surface physical chemistry
TiO2 nanotubes
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Summary:Uniform TiO2 nanotube arrays were fabricated on titanium substrates by self-organized anodic oxidation. CdSe quantum dots (QDs) were assembled onto TiO2 nanotube layers, which serve as sensitizers. The photocurrent measurement shows that annealing is essential to increase the anatase phase and hence increase the photocurrent. Attachment of CdSe QDs dramatically increased the photocurrent of TiO2 nanotubes in the visible region. The photo-response of CdSe sensitized TiO2 also shows strong dependence to the QDs size. The possible mechanism for energy transfer between the CdSe QDs and the TiO2 nanotubes has been discussed.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2007.04.160