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    Hydrothermal synthesis of a crystalline rutile TiO2 nanorod based network for efficient dye-sensitized solar cells

    Access Status
    Fulltext not available
    Authors
    Yu, H.
    Pan, Jian
    Bai, Y.
    Zong, X.
    Li, X.
    Wang, L.
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Yu, H. and Pan, J. and Bai, Y. and Zong, X. and Li, X. and Wang, L. 2013. Hydrothermal synthesis of a crystalline rutile TiO2 nanorod based network for efficient dye-sensitized solar cells. Chemistry - A European Journal. 19 (40): pp. 13569-13574.
    Source Title
    Chemistry - A European Journal
    DOI
    10.1002/chem.201300999
    ISSN
    0947-6539
    School
    Fuels and Energy Technology Institute
    URI
    http://hdl.handle.net/20.500.11937/3384
    Collection
    • Curtin Research Publications
    Abstract

    One-dimensional (1D) TiO2 nanostructures are desirable as photoanodes in dye-sensitized solar cells (DSSCs) due to their superior electron-transport capability. However, making use of the DSSC performance of 1D rutile TiO2 photoanodes remains challenging, mainly due to the small surface area and consequently low dye loading. Herein, a new type of photoanode with a three-dimensional (3D) rutile-nanorod-based network structure directly grown on fluorine-doped tin oxide (FTO) substrates was developed by using a facile two-step hydrothermal process. The resultant photoanode possesses oriented rutile nanorod arrays for fast electron transport as the bottom layer and radially packed rutile head-caps with an improved large surface area for efficient dye adsorption. The diffuse reflectance spectra showed that with the radially packed top layer, the light-harvesting efficiency was increased due to an enhanced light-scattering effect. A combination of electrochemical impedance spectroscopy (EIS), dark current, and open-circuit voltage decay (OCVD) analyses confirmed that the electron-recombiantion rate was reduced on formation of the nanorod-based 3D network for fast electron transport. As a resut, a light-to-electricity conversion efficiency of 6.31 % was achieved with this photoanode in DSSCs, which is comparable to the best DSSC efficiencies that have been reported to date for 1D rutile TiO2. Rooting for rut Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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