A self-powered UV photodetector based on TiO2 nanorod arrays.

TitleA self-powered UV photodetector based on TiO2 nanorod arrays.
Publication TypeJournal Article
Year of Publication2013
AuthorsXie Y, Wei L, Wei G, Li Q, Wang D, Chen Y, Yan S, Liu G, Mei L, Jiao J
JournalNanoscale research letters
Date Published2013

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.

Alternate JournalNanoscale Res Lett