TiO2 Nanotube Array/Monolayer Graphene Film Schottky Junction Ultraviolet Light Photodetectors. (9th April 2013)

• Record Type: Journal Article
• Authors: Wang, Ming‐Zheng; Liang, Feng‐Xia; Nie, Biao; Zeng, Long‐Hui; Zheng, Ling‐Xia; Lv, Peng; Yu, Yong‐Qiang; Xie, Chao; Li, Yang Yang; Luo, Lin‐Bao
• Is Part Of: Particle and particle systems characterization. Volume 30:Number 7(2013:Jul.)
• Page Start: 630
• Page End: 636
• Publication Date: 2013-04-09
• Subjects: Particles -- Periodicals; 620.43
• DOI: 10.1002/ppsc.201300040
• Languages: English
• ISSNs: 0934-0866

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Schottky junctions made from a titanium dioxide nanotube (TiO₂NT) array in contact with a monolayer graphene (MLG) film are fabricated and utilized for UV light detection. The TiO₂NT array is synthesized by the anodization and the MLG through a simple chemical vapor deposition process. Photoconductive analysis shows that the fabricated Schottky junction photodetector (PD) is sensitive to UV light illumination with good stability and reproducibility. The corresponding responsivity (<italic>R</italic>), photoconductive gain (<italic>G</italic>), and detectivity (<italic>D*</italic>) are calculated to be 15 A W⁻¹, 51, and 1.5 × 10¹² cm Hz^1/2 W⁻¹, respectively. It is observed that the fabricated PD exhibits spectral sensitivity and a simple power‐law dependence on light intensity. Moreover, the height of the Schottky junction diode is derived to be 0.59 V by using a low temperature <italic>I–V</italic> measurement. Finally, the working mechanism of the TiO₂NT array/MLG film Schottky junction PD is elucidated.</p> </abstract>