Abstract
well-aliened rutile TiO2 nanorod arrays were synthesised directly on FTO substate by hydrothermal metered. By controlling the growth parameters such as precursor concentration, acidity, growth temperature and growth time, we obtained various morphologies of nanorods. Optimisation of the growth recipe leads to well-aligned vertical arrays of TiO2 nanorods with appropriate length width ration.Fieldemission scanning electron microscopy (FESEM) and x-ray diffraction (XRD) are used to characterise TiO2 noanorods. Dry-Sensitised solar cell (DSSC) assembled with the optimised nanorod array achieves an overall photoelectric conversion efficiency of 1.86%. Electrochemical impedance spectroscopy (EIS) measurement was applied to compare the electron transport and recombination properties of DSSCs using TiO2 nanorods with different length.
Controlled Growth of vertically aligned Tio2 nanorods arrays using the improved hydrothermal method and their application to dry-sensitised solar cells