title: A self-powered UV photodetector based on TiO2 nanorod arrays.
abstract: 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.
authors.affiliation: School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China. cyx@sdu.edu.cn.
authors.forename: Yanru
authors.initials: Y
authors.lastname: Xie
authors.forename: Lin
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authors.lastname: Wei
authors.forename: Guodong
authors.initials: G
authors.lastname: Wei
authors.forename: Qinghao
authors.initials: Q
authors.lastname: Li
authors.forename: Dong
authors.initials: D
authors.lastname: Wang
authors.forename: Yanxue
authors.initials: Y
authors.lastname: Chen
authors.forename: Shishen
authors.initials: S
authors.lastname: Yan
authors.forename: Guolei
authors.initials: G
authors.lastname: Liu
authors.forename: Liangmo
authors.initials: L
authors.lastname: Mei
authors.forename: Jun
authors.initials: J
authors.lastname: Jiao