Small lattice-mismatched Β-LiGa O2 (001) substrates have been used for the epitaxial growth of (0001) Zn1-x Mgx O films using the metallorganic chemical vapor deposition method. Structure characterizations by employing X-ray diffraction and transmission electron microscope demonstrate that no MgO or Mg cluster exists throughout the Zn1-x Mgx O films. The epitaxial (0001) Zn1-x Mgx O films are successfully grown on the (001) LiGa O2 substrates with the epitaxial relationship of ZnMgO LGO and [10 1- 0]ZnMgO LG O. Polarity of the Zn1-x Mgx O films is determined by the convergent beam electron diffraction technique as well as wet chemical etching. Both results indicate the Zn-polarity of Zn1-x Mgx O films. The room-temperature cathodoluminescence spectra of the epitaxial (0001) Zn1-x Mgx O films show an obvious blueshift of the near-bandedge emission with increasing Mg content, suggesting a successful bandgap engineering in the epitaxial (0001) Zn1-x Mg x O films on the (001) LiGa O2 substrates.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Surfaces, Coatings and Films
- Renewable Energy, Sustainability and the Environment
- Condensed Matter Physics