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Impact of Post- Deposition Heat Treatment on the Morphology and Optical Properties of Zinc Oxide (ZnO) Thin Film Prepared by Spin-Coating Technique

Received: 19 November 2017     Accepted: 4 December 2017     Published: 26 December 2017
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Abstract

This research work examines the structural and optical properties of ZnO thin films. Deposition were done by spin coating of solution of Zinc oxide onto pre-cleaned glass substrate at 4000 rpm for 30 sec using spin-coater under ambient condition at room temperature in order to form desired thickness of the film on the substrate. Post- deposition thermal annealing at different range of temperatures from 150°C to 600°C with steps of 50°C was carried out on the samples. The impact of thermal annealing on optical properties of the deposited thin film was investigated using UV-VIS spectrophotometer and scanning Electron Microscope for the morphology. The optical transmittance, reflectance, absorbance were recorded which was used to evaluate the optical band gap of Zinc oxide. Observation shows that band gap energy reduces as annealing temperature is increased from 150°C to 600°C. Observation made on the morphology using SEM model ASPEX 3020 showed that as the temperature increases the surface of the sample roughness increases. It was deduced that as the annealing temperature is increased the surface roughness increases. This may be due to increase in grain size with increase in annealing temperature. The band gap energy decreases as the annealing temperature increases.

Published in Journal of Photonic Materials and Technology (Volume 3, Issue 3)
DOI 10.11648/j.jmpt.20170303.11
Page(s) 20-28
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2017. Published by Science Publishing Group

Keywords

Spin-Coating, Thermal Annealing, Zinc Oxide, Morphology, Optical Properties

References
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  • APA Style

    Sunday Wilson Balogun, Yekini Kolawole Sanusi, Adebayo Olaniyi Aina. (2017). Impact of Post- Deposition Heat Treatment on the Morphology and Optical Properties of Zinc Oxide (ZnO) Thin Film Prepared by Spin-Coating Technique. Journal of Photonic Materials and Technology, 3(3), 20-28. https://doi.org/10.11648/j.jmpt.20170303.11

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    ACS Style

    Sunday Wilson Balogun; Yekini Kolawole Sanusi; Adebayo Olaniyi Aina. Impact of Post- Deposition Heat Treatment on the Morphology and Optical Properties of Zinc Oxide (ZnO) Thin Film Prepared by Spin-Coating Technique. J. Photonic Mater. Technol. 2017, 3(3), 20-28. doi: 10.11648/j.jmpt.20170303.11

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    AMA Style

    Sunday Wilson Balogun, Yekini Kolawole Sanusi, Adebayo Olaniyi Aina. Impact of Post- Deposition Heat Treatment on the Morphology and Optical Properties of Zinc Oxide (ZnO) Thin Film Prepared by Spin-Coating Technique. J Photonic Mater Technol. 2017;3(3):20-28. doi: 10.11648/j.jmpt.20170303.11

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  • @article{10.11648/j.jmpt.20170303.11,
      author = {Sunday Wilson Balogun and Yekini Kolawole Sanusi and Adebayo Olaniyi Aina},
      title = {Impact of Post- Deposition Heat Treatment on the Morphology and Optical Properties of Zinc Oxide (ZnO) Thin Film Prepared by Spin-Coating Technique},
      journal = {Journal of Photonic Materials and Technology},
      volume = {3},
      number = {3},
      pages = {20-28},
      doi = {10.11648/j.jmpt.20170303.11},
      url = {https://doi.org/10.11648/j.jmpt.20170303.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.jmpt.20170303.11},
      abstract = {This research work examines the structural and optical properties of ZnO thin films. Deposition were done by spin coating of solution of Zinc oxide onto pre-cleaned glass substrate at 4000 rpm for 30 sec using spin-coater under ambient condition at room temperature in order to form desired thickness of the film on the substrate. Post- deposition thermal annealing at different range of temperatures from 150°C to 600°C with steps of 50°C was carried out on the samples. The impact of thermal annealing on optical properties of the deposited thin film was investigated using UV-VIS spectrophotometer and scanning Electron Microscope for the morphology. The optical transmittance, reflectance, absorbance were recorded which was used to evaluate the optical band gap of Zinc oxide. Observation shows that band gap energy reduces as annealing temperature is increased from 150°C to 600°C. Observation made on the morphology using SEM model ASPEX 3020 showed that as the temperature increases the surface of the sample roughness increases. It was deduced that as the annealing temperature is increased the surface roughness increases. This may be due to increase in grain size with increase in annealing temperature. The band gap energy decreases as the annealing temperature increases.},
     year = {2017}
    }
    

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  • TY  - JOUR
    T1  - Impact of Post- Deposition Heat Treatment on the Morphology and Optical Properties of Zinc Oxide (ZnO) Thin Film Prepared by Spin-Coating Technique
    AU  - Sunday Wilson Balogun
    AU  - Yekini Kolawole Sanusi
    AU  - Adebayo Olaniyi Aina
    Y1  - 2017/12/26
    PY  - 2017
    N1  - https://doi.org/10.11648/j.jmpt.20170303.11
    DO  - 10.11648/j.jmpt.20170303.11
    T2  - Journal of Photonic Materials and Technology
    JF  - Journal of Photonic Materials and Technology
    JO  - Journal of Photonic Materials and Technology
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    PB  - Science Publishing Group
    SN  - 2469-8431
    UR  - https://doi.org/10.11648/j.jmpt.20170303.11
    AB  - This research work examines the structural and optical properties of ZnO thin films. Deposition were done by spin coating of solution of Zinc oxide onto pre-cleaned glass substrate at 4000 rpm for 30 sec using spin-coater under ambient condition at room temperature in order to form desired thickness of the film on the substrate. Post- deposition thermal annealing at different range of temperatures from 150°C to 600°C with steps of 50°C was carried out on the samples. The impact of thermal annealing on optical properties of the deposited thin film was investigated using UV-VIS spectrophotometer and scanning Electron Microscope for the morphology. The optical transmittance, reflectance, absorbance were recorded which was used to evaluate the optical band gap of Zinc oxide. Observation shows that band gap energy reduces as annealing temperature is increased from 150°C to 600°C. Observation made on the morphology using SEM model ASPEX 3020 showed that as the temperature increases the surface of the sample roughness increases. It was deduced that as the annealing temperature is increased the surface roughness increases. This may be due to increase in grain size with increase in annealing temperature. The band gap energy decreases as the annealing temperature increases.
    VL  - 3
    IS  - 3
    ER  - 

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Author Information
  • Department of Physics and Materials Science, Kwara State University Malete, Ilorin, Nigeria

  • Department of Physics and Materials Science, Kwara State University Malete, Ilorin, Nigeria

  • Department of Physics and Materials Science, Kwara State University Malete, Ilorin, Nigeria

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