Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (1): 18502-018502.doi: 10.1088/1674-1056/22/1/018502

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Enhancing UV photosensitivity of ZnO UV nanosensor using electrical stimulation at megahertz frequency

李德钊, 朱荣   

  1. State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments and Mechanology,Tsinghua University, Beijing 100084, China
  • 收稿日期:2012-02-17 修回日期:2012-08-28 出版日期:2012-12-01 发布日期:2012-12-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 91123017).

Enhancing UV photosensitivity of ZnO UV nanosensor using electrical stimulation at megahertz frequency

Li De-Zhao (李德钊), Zhu Rong (朱荣)   

  1. State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments and Mechanology,Tsinghua University, Beijing 100084, China
  • Received:2012-02-17 Revised:2012-08-28 Online:2012-12-01 Published:2012-12-01
  • Contact: Zhu Rong E-mail:rong_zhu@263.net
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 91123017).

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摘要： We report a novel technique to enhance the ultraviolent (UV) photosensitivity of ZnO nanosensor with ZnO nanowires bridged on micromachined metallic electrodes. The experimental results reveal that the photoconductivity and the time response of the ZnO nanowire sensor with either Schottky or Ohmic contacts are significantly improved by electrifying the nanowire sensors using an alternating current at the frequency of megahertz. An integrated UV sensor incorporating ZnO nanowires with a constant current mode driving circuit is developed, which demonstrates promising sensitivity and time response to UV illumination with a low power consumption.

关键词: UV nanosensor, photosensitivity, ZnO nanowires, electrical stimulation

Abstract: We report a novel technique to enhance the ultraviolent (UV) photosensitivity of ZnO nanosensor with ZnO nanowires bridged on micromachined metallic electrodes. The experimental results reveal that the photoconductivity and the time response of the ZnO nanowire sensor with either Schottky or Ohmic contacts are significantly improved by electrifying the nanowire sensors using an alternating current at the frequency of megahertz. An integrated UV sensor incorporating ZnO nanowires with a constant current mode driving circuit is developed, which demonstrates promising sensitivity and time response to UV illumination with a low power consumption.

Key words: UV nanosensor, photosensitivity, ZnO nanowires, electrical stimulation

中图分类号:  (Semiconductor-device characterization, design, and modeling)

  • 85.30.De
62.23.Hj (Nanowires) 85.60.Gz (Photodetectors (including infrared and CCD detectors))