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Size-Tunable, Fast, and Facile Synthesis of Titanium Oxide Nanotube Powders for Dye-Sensitized Solar Cells

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posted on 2016-02-20, 13:47 authored by Kun Seok Lee, Jeong Kwon, Jeong Hyeok Im, Chang Ryul Lee, Nam-Gyu Park, Jong Hyeok Park
Size-tunable titanium oxide (TiO2) nanotube powders offering both a light-scattering effect and a light-harvesting function were synthesized by a fast and facile anodizing method. When used to prepare the TiO2 layer for a photoanode, their photovoltaic performances were much worse than that of a nanocrystal TiO2 layer. However, when the TiO2 nanotube powders were used as a light-scattering layer on a nanocrystal TiO2 layer, the highest conversion efficiency was obtained because of more noticeable light absorption of the longer wavelength, which was not attainable from a pure nanocrystal TiO2 layer or the combination of nanocrystal TiO2/commercialized light-scattering particles.

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