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Growth of TiO2 nanowire bundle arrays and their application in dye-sensitized solar cells

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Abstract

Highly oriented single-crystalline TiO2 nanowire bundle arrays on transparent conductive fluorine-doped tin oxide substrates are prepared by hydrothermal method using the precursors of titanium butoxide, deionized water and hydrochloric acid. The structure and morphology characteristics of all the samples have been analyzed by X-ray diffraction (XRD), scanning electron microscopy and transmission electron microscopy. Results show that the diameter, length, and density of the nanowire bundle arrays can be varied by changing the growth parameters, such as growth time, initial reactant concentration and acidity. The enhanced (002) peak in XRD patterns indicate that the nanowire is well crystallized and grow perpendicular to the substrate. The high resolution transmission electron microscope images and selected-area electron diffraction patterns confirm that there are approximately 10–30 nanowires in each bundle. The nanowire is single crystalline. Dye-sensitized solar cells assembled from oriented TiO2 nanowire bundle arrays as the photoanode are studied. The light-to-electricity conversion efficiency is about 2.17 %.

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Acknowledgments

We are gratefully acknowledge the financial support of the projects from the Science and Technology Department of Guangdong Province (Grant No. 2008B0108 00004) and the Projects from the National Natural Science of China (Grant No. 51202037).

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Authors and Affiliations

  1. School of Material and Energy, Guangdong University of Technology, Guangzhou, 510006, China

    Jun Liu, Aixiang Wei, Zengxian Ge & Wang Zhao

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  1. Jun Liu
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  2. Aixiang Wei
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  3. Zengxian Ge
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  4. Wang Zhao
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Correspondence to Aixiang Wei.

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Liu, J., Wei, A., Ge, Z. et al. Growth of TiO2 nanowire bundle arrays and their application in dye-sensitized solar cells. J Mater Sci: Mater Electron 24, 542–547 (2013). https://doi.org/10.1007/s10854-012-0999-8

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  • DOI: https://doi.org/10.1007/s10854-012-0999-8

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