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Journal of Sol-Gel Science and Technology

, Volume 71, Issue 3, pp 540–548 | Cite as

Electrical investigation and ultraviolet detection of ZnO nanorods encapsulated with ZnO and Fe-doped ZnO layer

  • R. Azimirad
  • A. Khayatian
  • M. Almasi Kashi
  • S. Safa
Original Paper

Abstract

Encapsulated ZnO nanorod arrays were fabricated using a two-step method; hydrothermal followed by dip-coating. Intensity of X-ray diffraction peaks of ZnO nanorod films increased by encapsulation with ZnO and Fe doped ZnO layer. Encapsulation process increased diameter of the rods in a range of 20–40 nm. The optical studies indicated that the band-gap decreased with increment of the nanorod diameter, and increased with Fe doping in the ZnO layer. The electrical resistance of the samples demonstrated a remarkable reduction due to encapsulation, especially in the sample encapsulated with Fe doped-ZnO layer. The photoresponse behavior of ZnO nanorod films was investigated under different powers of ultraviolet illumination. The photoresponsivity was improved for encapsulated nanorods as compared to bare nanorods.

Keywords

ZnO nanostructure Encapsulation process Doping UV sensor Photoresponsivity Sensitivity 

Notes

Acknowledgments

The authors would like to thank the Iran National Science Foundation for the financial support of the work.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • R. Azimirad
    • 1
  • A. Khayatian
    • 2
  • M. Almasi Kashi
    • 2
  • S. Safa
    • 3
  1. 1.Malek-Ashtar University of TechnologyTehranIran
  2. 2.Department of PhysicsUniversity of KashanKashanIran
  3. 3.Young Researchers and Elite ClubSouth Tehran Branch, Islamic Azad UniversityTehranIran

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