Abstract
Anodic titanium dioxide (TiO2) nanotube arrays on Ti foil were synthesized using electrochemical anodization technique and annealed at 700 °C without annihilating the nanotubular assemblies. The nanotubular structure was used to fabricate UV photodetection device based on Metal-Semiconductor-Metal. The photodetection device exhibited UV-sensitive photoresponse characteristics due to the mixed anatase and rutile phases of the TiO2 nanotube arrays. The photoresponse analysis showed good sensitivity to UV light irradiation with excellent stability and reproducibility. Moreover, the UV photodetector revealed the current gain is 7, response time is 0.77 s and decay time is 0.79 s, respectively at biased voltage 4 V. As mentioned above, the UV photodetector based on mixture of anatase and rutile phase nanotube arrays is a recommended nano-optoelectronic apparatus that is remarkably applicable over Ultraviolet band.
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