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Optical and structural properties of sol-gel prepared MgZnO alloy thin films |
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| Authors: | Mingsong Wang Sunwook Kim Ik-Keun Yoo Sung Hong Hahn |
| Affiliation: | a Department of Chemical Engineering, University of Ulsan, Ulsan 680-749, South Korea b Department of Physics, University of Ulsan, Ulsan 680-749, South Korea c School of Chemical Engineering and Technology, Yeungnam University, Gyeongsan 712-749, South Korea |
| Abstract: | MgxZn1−xO (x = 0-0.5) alloy thin films were prepared by a sol-gel dip-coating method. Mg0.1Zn0.9O and Mg0.5Zn0.5O films prepared were annealed in the range of 400-900 °C to investigate their thermal stability and temperature-dependent optical properties. The Mg0.1Zn0.9O films were thermally stable in the investigated annealing temperature range and exhibited the maximum ultraviolet emission at 800 °C. The segregation of MgO occurred in the Mg0.5Zn0.5O films, and the near-band-edge ultraviolet emission of this alloy was enhanced with increasing annealing temperature. The Mg saturation content in the sol-gel prepared MgZnO alloys was found to be about 0.23 where the band gap extended to 3.48 eV. |
| Keywords: | Photoluminescence Optical properties Sol-gel method MgZnO |
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