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Noise Properties of Mg-Doped ZnO Nanorods Visible-Blind Photosensors

Liu, Y. H. ; Young, S. J. ; Ji, L. W. ; Chang, S. J.

IEEE journal of selected topics in quantum electronics, 2015-07, Vol.21 (4), p.223-227 [Periódico revisado por pares]

New York: IEEE

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  • Título:
    Noise Properties of Mg-Doped ZnO Nanorods Visible-Blind Photosensors
  • Autor: Liu, Y. H. ; Young, S. J. ; Ji, L. W. ; Chang, S. J.
  • Assuntos: 1f noise ; Educational institutions ; Electrodes ; Glass ; hydrothermal method ; Illumination ; Magnesium ; Mg-ZnO ; Nanorods ; Noise ; Photodetectors ; Substrates ; Ultraviolet ; Wurtzite ; Zinc oxide
  • É parte de: IEEE journal of selected topics in quantum electronics, 2015-07, Vol.21 (4), p.223-227
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: In this investigation, Mg-doped ZnO nanorods were synthesized successfully on a glass substrate at 80 °C by hydrothermal method. The average length and diameter of the Mg-ZnO nanorods were 609 nm and approximately 50 nm, respectively. The X-ray diffraction spectrum showed the Mg-ZnO nanorods had a wurtzite hexagonal phase. The Mg-doped ZnO nanorods are found to be single crystals grown along the c-axis. The photosensors showed good stability properties in ultraviolet (UV) illumination. The resulting Mg-doped ZnO nanorods have excellent potential for application in a UV photodetector (PD) because of the Mg-doped ZnO nanorods UV PD has a high UV-to-visible ratio, fast rise/fall time. Furthermore, the dynamic response of the Mg-doped ZnO nanorods PD with Au electrodes was stable and reproducible with an on/off current contrast ratio of approximately 4 × 10 3 . The ultraviolet-to-visible rejection ratio of the sample is approximately 400 when biased at 1 V, and the fabricated UV PD is visible-blind with a sharp cutoff at 350 nm. The low-frequency noise spectra obtained from the UV PD were caused purely by the 1/f noise. The noise-equivalent power and normalized detectivity (D * ) of the Mg-ZnO nanorod PD were 0.335 × 10 -9 W and 1.49 × 10 8 cm · Hz 0.5 · W -1 , respectively.
  • Editor: New York: IEEE
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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