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Band gap tuning and defects suppression upon Mg doping in electrospun ZnO nanowires

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Abstract

We report the synthesis of inter-twinned ZnO nanowires doped with Mg2+ by electrospinning polyvinyl alcohol along with metal oxide precursors followed by heat treatment 650 °C for 3 h in air. Mg doping influences the morphology of the nanofibers as well as the structure and optical properties of the heat treated samples. Up to 5 wt% Mg doping, single phase wurtzite structure of ZnO is retained. Optical bandgap energy of ZnO nanowires could be tuned over the range of 3.25–3.56 eV by increasing Mg doping up to 8 wt%. Interestingly, defects present in undoped ZnO decreased drastically upon doping with Mg.

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Acknowledgements

Financial support from the Board of Research in Nuclear Sciences, Department of Atomic Energy, Government of India, vide Project No. 2010/34/54/BRNS is acknowledged. AS thanks University of South Africa for a Visiting Professor position.

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Authors and Affiliations

  1. Department of Physics, Indian Institute of Technology Guwahati, Guwahati, 781039, India

    Arnab Kumar Das & A. Srinivasan

  2. Department of Physics, Behala College, Kolkata, 700060, India

    Arnab Kumar Das

  3. Department of Physics, University of South Africa, Johannesburg, 1710, South Africa

    A. Srinivasan

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  1. Arnab Kumar Das
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  2. A. Srinivasan
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Correspondence to A. Srinivasan.

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Das, A.K., Srinivasan, A. Band gap tuning and defects suppression upon Mg doping in electrospun ZnO nanowires. J Mater Sci: Mater Electron 28, 6488–6492 (2017). https://doi.org/10.1007/s10854-017-6336-5

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  • DOI: https://doi.org/10.1007/s10854-017-6336-5

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