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Tailoring of ZnO with selected group-II elements for LED materials

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Abstract

The semiconductor ZnO is a promising candidate for its applications in light-emitting diodes. In this study ZnO nanostructures tailored with selected group-II elements were synthesized using sol–gel-based fuel-agent-assistive chemical technique. Structural studies from X-ray diffraction analysis revealed the presence of wurtzite hexagonal crystal structure in all compositions confirming the stability of the Mg-doped structure while indicating presence of some traces of un-reacted and oxides of Sr and Ba in other compositions. Lattice parameters, crystallite size, lattice strain, density, and cell volume were extracted from X-ray diffraction data. Morphology and elemental composition analysis showed exact correlation with structural arrangements. The size of particles was also observed with dynamic light-scattering measurements. Absorbance and electrical transport studies were performed using UV–Vis spectrophotometry and four-probe measurements, respectively; the former was used to estimate the band gap of nanostructures. Energy-dispersive X-ray analysis was employed for confirming the substitution of Mg, Sr, and Ba atoms at Zn and O sites. Band gap values show strong dependence upon the tailored ZnO compositions.

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Acknowledgments

We like to thank Dr. Irshad Hussain and Dr. Falak Sher for providing access to XRD, particle size measurement and UV–Vis facilities to complete this research work.

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Authors and Affiliations

  1. Department of Physics, Syed Babar Ali School of Science and Engineering (SBASSE), Lahore University of Management Sciences (LUMS), Opposite Sector U, D.H.A. Lahore, 54792, Pakistan

    Murtaza Saleem & M. Sabieh Anwar

  2. Department of Physics, Mirpur University of Science and Technology (MUST), Mirpur, Azad Jammu and Kashmir, Pakistan

    Adnan Manzoor & Mohammed Zaffar

  3. Department of Chemistry, Syed Babar Ali School of Science and Engineering (SBASSE), Lahore University of Management Sciences (LUMS), Opposite Sector U, D.H.A. Lahore, 54792, Pakistan

    Syed Zajif Hussain

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  1. Murtaza Saleem
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  2. Adnan Manzoor
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  3. Mohammed Zaffar
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  4. Syed Zajif Hussain
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  5. M. Sabieh Anwar
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Correspondence to Murtaza Saleem.

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Saleem, M., Manzoor, A., Zaffar, M. et al. Tailoring of ZnO with selected group-II elements for LED materials. Appl. Phys. A 122, 589 (2016). https://doi.org/10.1007/s00339-016-0118-4

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