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    • Keywords


      ZnO nanoparticles; Williamson–Hall plots; optical bandgap; X-ray photoelectron spectroscopy; oxygen vacancies.

    • Abstract


      This article deals with the synthesis, structural and optical characterizations of vanadium ion-doped ZnO nanoparticles. Four nanosized samples with a generic composition Zn$_{1–x}$V$_x$O (x = 0.00, 0.02, 0.04 and 0.06) were prepared using standard co-precipitation method. X-ray diffraction studies confirmed the existence of hexagonal wurtzite crystal structure and phase purity of prepared samples. Mean crystallites size within the range of 25 ± 3 nm was obtained from Scherrer’s formula. The compressive microstrain in the pure ZnO sample as obtained from Williamson–Hall plot ensured the presence of vacancies inside the nanocrystals. The surface morphology of doped ZnO nanocrystals was studied using field-emission scanning electron microscope image. Undoped ZnO nanoparticles showed a strong optical absorption near 390 nm. A redshift in direct bandgaps with increasing vanadium ions in ZnO matrix was noticed. Vanadium ions were present in three different oxidation states (+2, +3 and +4) within the host ZnO structure as obtained from X-ray photoelectron spectra. Photoluminescence studies also detected the existence of both zinc and oxygen vacancies in the synthesized nanoparticles.

    • Author Affiliations



      1. Department of Applied Physics, Amity Institute of Applied Sciences, Amity University, Noida 201313, India
      2. Department of Physics, National Institute of Technology Patna, Patna 800005, India
    • Dates

  • Bulletin of Materials Science | News

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