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Nanoparticle Layers Transformed from Ordered TiO2 Nanotube Arrays and Dye-Sensitized Solar Cells

Published online by Cambridge University Press:  31 January 2011

Yahya Alivov ,
Xuan Pan ,
Mahesh Pandikunta ,
Vladimir Kuryatkov ,
Sergey A Nikishin ,
Mark Holtz  and
Zhaoyang Fan
Yahya Alivov
Affiliation:
yahya.alivov@ttu.edu, Texas Tech University, Nano Tech Center, 1012 Boston Ave, Lubbock, Texas, 79409, United States
Xuan Pan
Affiliation:
xuan.pan@ttu.edu, Texas Tech University, Nano Tech Center, 1012 Boston Ave, Lubbock, Texas, 79409, United States
Mahesh Pandikunta
Affiliation:
mahesh.pandikunta@ttu.edu, United States
Vladimir Kuryatkov
Affiliation:
VLADIMIR.KURYATKOV@ttu.edu, Texas Tech University, Nano Tech Center, Eng and Tech Lab/10th and Akron, Lubbock, Texas, 79409, United States
Sergey A Nikishin
Affiliation:
sergey.a.nikishin@ttu.edu, Texas Tech University, Nano Tech Center, Lubbock, Texas, 79409, United States
Mark Holtz
Affiliation:
MARK.HOLTZ@ttu.edu, Texas Tech University, Physics, Box 41051, U.S.A., Texas, 79409-1051, United States
Zhaoyang Fan
Affiliation:
zhaoyang.fan@ttu.edu, Texas Tech University, Lubbock, Texas, United States
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Abstract

Transformation of titanium dioxide (TiO2) nanotubes (NTs) to truncated bipyramidal shape nanoparticles (NPs) with a large fraction of photo-catalytically active {001} facet surface was observed after thermal annealing TiO2 ordered nanotube arrays in fluorine ambient. Size of the formed nanoparticles depended on fluorine concentration and can be controlled from 20 nm to 350 nm. The crystal and optical properties of nanoparticle layers are superior to those of nanotube arrays, which are also annealed but without geometrical transformation. Using nanoparticle layers formed by this method we have fabricated dye-sensitized solar cells (DSSCs) with different size NPs in the range 35-350 nm. The dependence of solar cell performance on NP size is discussed.

Keywords

nanostructureoxidephotovoltaic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1211: Symposium R – Advanced Nanostructured Solar Cells , 2009 , 1211-R08-33
Copyright
Copyright © Materials Research Society 2010

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