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Hydrothermal synthesis of rutile-anatase TiO2 nanobranched arrays for efficient dye-sensitized solar cells

Title
Hydrothermal synthesis of rutile-anatase TiO2 nanobranched arrays for efficient dye-sensitized solar cells
Authors
Kwon, Soon JinIm, Hyo BeenNam, Jung EunKang, Jin KyuHwang, Taek SungYi, Kwang Bok
DGIST Authors
Kang, Jin Kyu
Issue Date
2014-11-30
Citation
Applied Surface Science, 320, 487-493
Type
Article
Article Type
Article
Keywords
Anatase TiOCrystalline NanostructureDye-Sensitized Solar Cells (DSCs)Field Emission MicroscopesField Emission Scanning Electron MicroscopyGrowth TimeHydrothermal SynthesisNanobranchesNanorodsOxide MineralsRutile-anatase TiO2 Nanobranched ArraysRutile TiOScanning Electron MicroscopySolar CellsTiCl4 treatmentTitanium DioxideTitanium PrecursorsX Ray Diffraction Analysis
ISSN
0169-4332
Abstract
Rutile-anatase TiO2 nanobranched arrays were prepared in two sequential hydrothermal-synthesis steps. The morphologies and crystalline nanostructures of the samples were investigated by controlling growth time and the concentration of the titanium precursor. All samples were characterized by field-emission scanning electron microscopy and X-ray diffraction analysis. It was found that treating the surfaces of rutile TiO2 nanorods with aqueous TiCl4 solutions allows the anatase TiO2 nanobranches to grow perpendicular to the main rutile TiO2 nanorods attached to the FTO glass. Irregularly shaped, dense TiO2 structures formed in the absence of TiCl4 treatment. A light-to-electricity conversion efficiency of 3.45% was achieved using 2.3 μm tall TiO2 nanobranched arrays in a dye-sensitized solar cell. This value is significantly higher than that observed for pure rutile TiO2 nanorods. © 2014 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/5237
DOI
10.1016/j.apsusc.2014.09.110
Publisher
Elsevier B.V.
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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