UV sensor based on TiO₂ nanorod arrays on FTO thin film

Highly oriented TiO₂ nanorod arrays were fabricated directly on fluorine-doped tin oxide-coated glass (FTO) substrate by the hydrothermal method. The diameter, length, and density of the nanorods could be varied by changing the growth parameters, such as time, temperature, and initial reactant concentration. The fabricated samples were characterized with X-ray diffraction, field-emission-scanning electron microscopy, transmission electron microscopy, high resolution transmission electron microscopy and energy dispersive X-ray spectroscopy. The TiO₂ nanorod array was applied to construct photoelectric devices, by which highly sensitive and steady photocurrent responses were obtained.