Journal
APPLIED SURFACE SCIENCE
Volume 355, Issue -, Pages 1279-1288Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.07.169
Keywords
CdSxSe1-x quantum dots; TiO2 nanotubes; Anodization; SILAR; Photoelectrochemical
Categories
Funding
- Department of Energy [DE-FC36-06-GO86066, DE-EE0003158]
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The photoelectrochemical performance of CdSSe quantum dots tethered to a framework of vertically oriented titania (TiO2) nanotubes was studied. The TiO2/CdSSe framework demonstrated improved charge transfer due to its unique band edge structure, thus validating the higher photocurrent generation. The composite film led to an 11-fold enhancement in comparison to the control TiO2 film, implying that the ternary quantum dots and the nanotubular structure of TiO2 work in tandem to promote charge separation and favorably impact photoelectrochemical performance. Further, the results also suggest that structural and optoelectronic properties of TiO2 films are significantly affected by the thicknesses of the CdSSe layer. (C) 2015 Elsevier B.V. All rights reserved.
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