Broad range tuning of structural and optical properties of ZnxMg1-xO nanostructures grown by vapor transport method

Jignesh V. Vanjaria, Ebraheem Ali Azhar, Hongbin Yu

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

One-dimensional (1D) ZnxMg1-xO nanomaterials have drawn global attention due to their remarkable chemical and physical properties, and their diverse current and future technological applications. In this work, 1D ZnMgO nanostructures with different magnesium concentrations and different morphologies were grown directly on zinc oxide-coated silicon substrates by thermal evaporation of zinc oxide, magnesium boride and graphite powders. Highly well-defined Mg-rich ZnMgO nanorods with a rock salt structure and Zn-rich ZnMgO nanostructures with a wurtzite structure have been deposited individually by careful optimization of the source mixture and process parameters. Structural and optical properties of the deposited products were studied by scanning electron microscopy, energy dispersive x-ray spectroscopy, x-ray diffraction, and Raman spectroscopy. Cathodoluminescence measurements demonstrate strong dominant peaks at 3.3 eV in Mg poor ZnMgO nanostructures and 4.8 eV in Mg rich nanostructures implying that the ZnMgO nanostructures can be used for the fabrication of deep UV optoelectronic devices. A mechanism for the formation and achieved diverse morphology of the ZnMgO nanostructures was proposed based on the characterization results.

Original languageEnglish (US)
Article number465103
JournalJournal of Physics D: Applied Physics
Volume49
Issue number46
DOIs
StatePublished - Oct 24 2016

Keywords

  • bandgap tuning
  • UV
  • wide bandgap
  • ZnMgO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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