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

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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.

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Acknowledgments

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

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Authors and Affiliations

  1. Malek-Ashtar University of Technology, Tehran, Iran

    R. Azimirad

  2. Department of Physics, University of Kashan, P.O. Box 87147.71147, Kashan, Iran

    A. Khayatian & M. Almasi Kashi

  3. Young Researchers and Elite Club, South Tehran Branch, Islamic Azad University, Tehran, Iran

    S. Safa

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  1. R. Azimirad
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  2. A. Khayatian
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  3. M. Almasi Kashi
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  4. S. Safa
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Correspondence to M. Almasi Kashi.

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Azimirad, R., Khayatian, A., Almasi Kashi, M. et al. Electrical investigation and ultraviolet detection of ZnO nanorods encapsulated with ZnO and Fe-doped ZnO layer. J Sol-Gel Sci Technol 71, 540–548 (2014). https://doi.org/10.1007/s10971-014-3406-5

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  • DOI: https://doi.org/10.1007/s10971-014-3406-5

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