Hydrothermal synthesis of well-aligned hierarchical TiO2 tubular macrochannel arrays with large surface area for high performance dye-sensitized solar cells

Xiaoyue Wang, Haibo Li, Yong Liu, Wenxia Zhao, Chaolun Liang, Hong Huang, Delin Mo, Zhong Liu, Xiao Yu, Youjun Deng and Hui Shen

Applied Energy, 2012, vol. 99, issue C, 198-205

Abstract: Well-aligned hierarchical TiO2 tubular macrochannel arrays (HTTMAs) with high surface area have been synthesized via a facile one-step ammonia hydrothermal synthesis process without using any structure-directing templates. The typical samples are made of an assembly of macrochannels with uniform openings centered at 2.2μm and a channel density of 1.7×107cm−2. The interconnected macro-mesoporous samples possess a high surface area of 229.6m2g−1 and main pore size centered at 4.1nm. Powder X-ray diffraction and transmission electron microscopy demonstrated that the samples had a mixture of rutile and anatase phases. The light scattering properties of samples were studied by UV–Vis spectrometer in the 350–800nm wavelength range. Dye-sensitized solar cells made of HTTMAs showed an energy conversion efficiency of 8.10% under AM1.5 illumination, which was much higher compared to that (6.24%) of cells consisting of P25 nanoparticles with the same film thickness.

Keywords: TiO2; Hierarchical; Macrochannel arrays; Dye-sensitized; Solar cell (search for similar items in EconPapers)
Date: 2012
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Citations: View citations in EconPapers (8)

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DOI: 10.1016/j.apenergy.2012.05.014

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