Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Composition Dependence on Structural and Optical Properties of MgxZn1-xO Thin Films Prepared by Sol-Gel Method

  • Kim, Min-Su (Department of Nano Systems Engineering, Center for Nano Manufacturing, Inje University) ;
  • Noh, Keun-Tae (School of Nano Engineering, Inje University) ;
  • Yim, Kwang-Gug (Department of Nano Systems Engineering, Center for Nano Manufacturing, Inje University) ;
  • Kim, So-A-Ram (School of Nano Engineering, Inje University) ;
  • Nam, Gi-Woong (School of Nano Engineering, Inje University) ;
  • Lee, Dong-Yul (Epi R&D Team, Samsung LED Co. Ltd.) ;
  • Kim, Jin-Soo (Research Center of Advanced Materials Development (RCAMD), Division of Advanced Materials Engineering, Chonbuk National University) ;
  • Kim, Jong-Su (Department of Physics, Yeungnam University) ;
  • Leem, Jae-Young (Department of Nano Systems Engineering, Center for Nano Manufacturing, Inje University)
  • Received : 2011.06.29
  • Accepted : 2011.08.01
  • Published : 2011.09.20
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Abstract

The $Mg_xZn_{1-x}O$ thin films with the various content ratio ranging from 0 to 0.4 were prepared by sol-gel spincoating method. To investigate the effects of content ratio on the structural and optical properties of the $Mg_xZn_{1-x}O$ thin films, scanning electron microscopy (SEM), X-ray diffraction (XRD), and photoluminescence (PL) were carried out. With increase in the content ratio, the grain size of the $Mg_xZn_{1-x}O$ thin films was increased, however, at the content ratio above 0.2, MgO particles with cubic structure were formed on the surface of the $Mg_xZn_{1-x}O$ thin films, indicating that the Mg content exceeded its solubility limit in the thin films. The residual stress of the $Mg_xZn_{1-x}O$ thin films is increased with increase in the Mg mole fraction. In the PL investigations, the bandgap and the activation energy of the $Mg_xZn_{1-x}O$ thin films was increased with the Mg mole fraction.

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References

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