Fabrication and photovoltaic properties of heterostructured TiO ₂ nanowires

One-dimensional heterostructured TiO ₂ nanowires were successfully fabricated by an electrospinning technique and modi?ed by hydrolysis. We investigated their structure, morphology, chemical composition, and optical properties by using the X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and UV-vis spectroscopy. In the case of the photovoltaic performance, the short-circuit current density and cell ef?ciency of the DSSCs employing single TiO ₂ One-dimensional heterostructured TiO ₂ nanowires and heterostructured TiO ₂ nanowires improve from 6.90 to 11.38 mA/cm ² and from 2.56 to 4.29%, respectively. The results show that the photoconversion ef?ciency of the heterostructured TiO nanowires could be improved by more than ∼67% compared to that of the single TiO ₂ nanowires because of the enhanced speci?c surface area that facilitates dye adsorption.