TiO2 nanotube array/monolayer graphene film Schottky junction ultraviolet light photodetectors

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Ming-Zheng Wang
  • Feng-Xia Liang
  • Biao Nie
  • Long-Hui Zeng
  • Ling-Xia Zheng
  • Peng Lv
  • Yong-Qiang Yu
  • Chao Xie
  • Lin-Bao Luo

Detail(s)

Original languageEnglish
Pages (from-to)630-636
Journal / PublicationParticle and Particle Systems Characterization
Volume30
Issue number7
Publication statusPublished - Jul 2013

Abstract

Schottky junctions made from a titanium dioxide nanotube (TiO 2NT) 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 (R), photoconductive gain (G), and detectivity (D) are calculated to be 15 A W -1, 51, and 1.5 × 1012 cm Hz1/2 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 I-V measurement. Finally, the working mechanism of the TiO2NT array/MLG film Schottky junction PD is elucidated. A highly sensitive UV light photodetector is fabricated by coating a titanium dioxide nanotube (TiO2NT) array with a layer of monolayer graphene (MLG) film. Photoconductive analysis showed that the fabricated Schottky junction photodetector (PD) is sensitive to UV light illumination with good stability and reproducibility. The working mechanism of the TiO2NT array/MLG film Schottky junction PD is elucidated. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Citation Format(s)

TiO2 nanotube array/monolayer graphene film Schottky junction ultraviolet light photodetectors. / 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.

In: Particle and Particle Systems Characterization, Vol. 30, No. 7, 07.2013, p. 630-636.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review