Electronic Materials Letters

, Volume 15, Issue 3, pp 303–313 | Cite as

A High Performance Solar-Blind Detector Based on Mixed–Phase Zn0.45Mg0.55O Alloy Nanowires Network

  • Sai Ma
  • Shuanglong Feng
  • Shuai Kang
  • Feng Wang
  • Xie Fu
  • Wenqiang LuEmail author
Original Article - Electronics, Magnetics and Photonics


The mixed-phase Zn0.45Mg0.55O alloy nanowires network was firstly synthesized on SiO2/Si substrate by chemical vapor deposition method. The metal–semiconductor–metal structured Zn0.45Mg0.55O nanowires solar-blind photodetector with a sharp absorption peak of wavelength 245 nm was fabricated, which exhibited an ultra-low dark current (0.2 nA), a high on–off ratio (2.85 × 103), a large peak responsivity (0.48 A/W) at 6 V bias, and a high external quantum efficiency (234.2%). This excellent performance is comparable with other ZnMgO thin film UV photodetectors. Moreover, the detection mechanism of this photodetector is explained by the modifications in energy band diagrams of different nanojunctions among Zn0.45Mg0.55O nanowires and heterojunction interfaces between wurtzite and cubic structured ZnMgO in mixed-phase Zn0.45Mg0.55O nanowire. It is found that nanojunctions and heterojunction interfaces could be responsible for a low dark current and high responsivity of this device based on mixed-phase Zn0.45Mg0.55O nanowire materials. This work reveals that the distinctive advantages of mixed-phase ZnMgO nanowires network for ultraviolet optoelectronic detection applications.

Graphical Abstract


Mixed-phase Zn0.45Mg0.55Nanowires network Solar-blind UV photodetector 



This work was supported by the Chongqing Research Program of Basic Research and Frontier Technology (No.cstc2017jcyjBX0030), the National Natural Science Foundation of China (No.61605207), the Central Government Guides Local Science and Technology Development Special Funds (2018), Chongqing major themes of integrated circuit industry (2018).


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Copyright information

© The Korean Institute of Metals and Materials 2019

Authors and Affiliations

  • Sai Ma
    • 1
    • 2
  • Shuanglong Feng
    • 1
  • Shuai Kang
    • 1
  • Feng Wang
    • 3
  • Xie Fu
    • 1
  • Wenqiang Lu
    • 1
    • 2
    Email author
  1. 1.Chongqing Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent TechnologyChinese Academy of SciencesChongqingChina
  2. 2.University of Chinese Academy of SciencesBeijingChina
  3. 3.Changzhou Institute of Mechatronic TechnologyJiangsuChina

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