One-dimensional titania nanostructures: Synthesis and applications in dye-sensitized solar cells

One-dimensional (1D) titania (TiO2) in the form of nanorods, nanowires, nanobelts and nanotubes have attracted much attention due to their unique physical, chemical and optical properties enabling extraordinary performance in biomedicine, sensors, energy storage, solar cells and photocatalysis. In this review, we mainly focus on synthetic methods for 1D TiO2 nanostructures and the applications of 1D TiO2 nanostructures in dye-sensitized solar cells (DSCs). Traditional nanoparticle-based DSCs have numerous grain boundaries and surface defects, which increase the charge recombination from photoanode to electrolyte. 1D TiO2 nanostructures can provide direct and rapid electron transport to the electron collecting electrode, indicating a promising choice for DSCs. We divide the applications of 1D TiO2 nanostructures in DSCs into four parts, that is, 1D TiO2 nanostructures only, 1D TiO2 nanostructure/nanoparticle composites, branched 1D TiO2 nanostructures, and 1D TiO2 nanostructures combined with other materials. This work will provide guidance for preparing 1D TiO2 nanostructures, and using them as photoanodes in efficient DSCs.

1D TiO2 nanostructures which can provide direct and rapid pathways for electron transport have promising applications in dye-sensitized solar cells (DSCs). The synthetic methods and applications of 1D TiO2 nanostructures in DSCs are summarized in this review article.Figure optionsDownload high-quality image (212 K)Download as PowerPoint slide