Citation: CHANG Meng-Lei, LI Xin-Jun. Fabrication of Nanosheet/Nestlike Nanoarray Hierarchical TiO₂ Film for Dye-Sensitized Solar Cell[J]. Acta Physico-Chimica Sinica, ;2012, 28(06): 1368-1372. doi: 10.3866/PKU.WHXB201203161 shu

Fabrication of Nanosheet/Nestlike Nanoarray Hierarchical TiO₂ Film for Dye-Sensitized Solar Cell

CHANG Meng-Lei ^1,2 ,
LI Xin-Jun ^1,

1.
1. Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, P. R. China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Received Date: 17 February 2012
Available Online: 16 March 2012
Fund Project: 国家自然科学基金(51172233)与国家重点基础研究发展计划项目(973) (2009CB220002)资助 (51172233)与国家重点基础研究发展计划项目(973) (2009CB220002)

A hierarchical configuration of TiO₂ nanoarray film, comprising a nestlike TiO₂ nanoarray layer integrated with a nanosheet network overlayer, was constructed. The hierarchical TiO₂ film was obtained by the post-hydrothermal treatment with NaOH solution on hydrothermally synthesized TiO₂-derived nanostructured arrays grown on fluorine-doped tin oxide substrate (FTO). The TiO₂ films were characterized by field-emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) diffuse reflectance spectroscopy, and absorbance spectroscopy. FE-SEM shows that the hierarchical TiO₂ film with a thickness of 1.5 μm is composed of a nanosheet overlayer (~0.2 μm height) and the nestlike nanoarray layer (~1.3 μm height). XRD patterns display that the TiO₂ films have pure anatase phase structure. UV-Vis spectra reveal enhanced light scattering and dye adsorption ability of the hierarchical TiO₂ film. For the dye-sensitized solar cell (DSSC) based on the nanosheet/nestlike nanoarray hierarchical TiO₂ film, a short-circuit current (J_sc) of 7.79 mA·cm^-2, open-circuit voltage (V_oc) of 0.80 V, fill factor (FF) of 0.40, and photoelectric conversion efficiency (η) of 2.48% are achieved. Within the dye-sensitized solar cell, the photoelectric conversion efficiency of the hierarchical TiO₂ film was nearly ten times higher than that of nanostructured array film.
- TiO₂,
- Nanosheet/nestlike nanoarray,
- Hydrothermal synthesis,
- Dye-sensitized solar cell,
- Photoelectric conversion
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沈阳化工大学材料科学与工程学院沈阳 110142

Fabrication of Nanosheet/Nestlike Nanoarray Hierarchical TiO2 Film for Dye-Sensitized Solar Cell

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通讯作者: 陈斌, bchen63@163.com

Fabrication of Nanosheet/Nestlike Nanoarray Hierarchical TiO₂ Film for Dye-Sensitized Solar Cell