Synthesis of TiO2 Nanotubes and Photodiode Performance

In this study, titanium dioxide (TiO2) nanotubes were produced by anodization method using glycerol-based electrolyte. Structural characterization was investigated with SEM images and XRD pattern. The rectifying properties of n-type semiconductor TiO2 nanotubes were investigated. Current-voltage (I-V) measurements of the Pt/TiO2 nanotubes/Ti device were made at room temperature, in the dark and under different illumination conditions. The basic diode parameters were calculated by using thermionic emission (TE), Cheung and Norde functions from the I-V measurements of the devices in dark conditions. The ideality factors and barrier height of the Pt/TiO2 nanotubes/Ti device were calculated 1.25 and 0.91 eV, respectively by the TE method. According to the results obtained, the Pt/TiO2 nanotubes contact has a rectifying feature. In addition, the photovoltaic properties of the devices were examined by making I-V measurements at illumination intensities between 30 and 100 mW/cm2. As a result, it has been evaluated that the device can also be used as a photodiode.

Keywords:

TiO2, Nanotubes, Photodiodes Electrical characteristic,

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