Bilayer Structured Nanowire-array and Nanotube-cluster TiO2 Photoanode for Efficient Dye-sensitized Solar Cells

doi:10.1007/s40242-015-5003-8

Abstract

Abstract:

Nanowire-array nanotube-cluster bilayer TiO₂ films, consisting of nanowire-array at the bottom layer and nanotube-cluster at the top layer were prepared via a two-step hydrothermal method. One step was a growth process and the other was an etching process. Etching process was used to acquire nanowire-array with a small diameter of 20-25 nm of the nanowire and nanotube-cluster. The bilayer nanostructured films were then modified with TiCl₄. Villous TiO₂ attached to both the inside and outside walls of the nanotube cluster was obtained only by changing the traditional concentration of TiCl₄-treatment to 0.2 mol/L. The novel bilayer photoanode finally revealed a higher efficiency of 5.25% when used in dye-sensitized solar cells(DSSCs).

Key words: Bilayer structure, Etching, Titanium oxide, Photoanode, Dye-sensitized solar cell

YU Jun, ZHANG Chengkai, ZHUANG Jia, QIN Haiyang, HE Quangui, LIANG Qiumei. Bilayer Structured Nanowire-array and Nanotube-cluster TiO₂ Photoanode for Efficient Dye-sensitized Solar Cells[J]. Chemical Research in Chinese Universities, 2015, 31(3): 412-417.

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Bilayer Structured Nanowire-array and Nanotube-cluster TiO₂ Photoanode for Efficient Dye-sensitized Solar Cells

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