A self-powered UV photodetector based on TiO2 nanorod arrays

被引：173

作者：

Xie, Yanru ^{[1
,2
]}

Wei, Lin ^{[3
]}

Wei, Guodong ^{[1
,2
]}

Li, Qinghao ^{[1
,2
]}

Wang, Dong ^{[1
,2
]}

Chen, Yanxue ^{[1
,2
]}

Yan, Shishen ^{[1
,2
]}

Liu, Guolei ^{[1
,2
]}

Mei, Liangmo ^{[1
,2
]}

Jiao, Jun ^{[4
,5
]}

机构：

[1] Shandong Univ, Sch Phys, Jinan 250100, Peoples R China

[2] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

[3] Shandong Univ, Sch Informat Sci & Engn, Jinan 250100, Peoples R China

[4] Portland State Univ, Dept Mech & Mat Engn, Portland, OR 97207 USA

[5] Portland State Univ, Dept Phys, Portland, OR 97207 USA

来源：

NANOSCALE RESEARCH LETTERS | 2013年 / 8卷

基金：

中国国家自然科学基金;

关键词：

TiO2; Nanorod; Ultraviolet photodetector; Solid-liquid heterojunction;

D O I：

10.1186/1556-276X-8-188

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页码：1 / 6

页数：6

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