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2805222 
Journal Article 
A self-powered UV photodetector based on TiO2 nanorod arrays 
Xie, Y; Wei, L; Wei, G; Li, Q; Wang, D; Chen, Y; Yan, S; Liu, G; Mei, L; Jiao, J 
2013 
1 
Nanoscale Research Letters
ISSN: 1931-7573 
8 
1 
188 
English 
23618012 
Large-area vertical rutile TiO2 nanorod arrays (TNAs) were grown on F/SnO2 conductive glass using a hydrothermal method at low temperature. A self-powered ultraviolet (UV) photodetector based on TiO2 nanorod/water solid-liquid heterojunction is designed and fabricated. These nanorods offer an enlarged TiO2/water contact area and a direct pathway for electron transport simultaneously. By connecting this UV photodetector to an ammeter, the intensity of UV light can be quantified using the output short-circuit photocurrent without a power source. A photosensitivity of 0.025 A/W and a quick response time were observed. At the same time, a high photosensitivity in a wide range of wavelength was also demonstrated. This TNA/water UV detector can be a particularly suitable candidate for practical applications for its high photosensitivity, fast response, excellent spectral selectivity, uncomplicated low-cost fabrication process, and environment-friendly feature.