Srimurugananthan, Sriluxmi;
(2024)
Zinc Oxide Thin Films for Optoelectronic Applications.
Doctoral thesis (Eng.D), UCL (University College London).
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Abstract
This thesis describes the synthesis of Zinc Oxide thin films for optoelectronic applications. Aerosol assisted chemical vapour deposition was used to deposit the Zinc Oxide thin films on to glass substrates. There were three main objectives for the work carried out in this thesis. The first was to evaluate the effect of using molecular precursors of varying Zn:O ratios to synthesise ZnO thin films. The morphology of the thin films was analysed to evaluate the relationship between the molecular structure of the precursor used and the resultant functional properties of the thin film. The effect of temperature and chemical environment on the morphology of ZnO thin films was also investigated as part of this study. The second objective was to enhance the optoelectronic properties of zinc oxide thin films through using a seeding layer to achieve highly textured thin films. As such, the second results chapter of the thesis explores the use of ZnO films as structural templates otherwise known as ‘seeding layers’ to epitaxially grow highly self-textured, compact and transparent ZnO film coatings. The third and final objective of the thesis was to find the optimum doping of ZnO thin films to enhance optoelectronic properties. Aluminium has been investigated as a dopant for ZnO thin films at different concentrations. The ZnO thin films presented in this thesis have been characterised using a wide range of techniques. The optical properties of the films were characterised using UV-visible-near infrared spectroscopy. Hall effect measurements were carried out on the thin films to examine their electronic properties. X-ray diffraction (XRD) was used to look at the crystallography of the films and elemental analysis of the films was conducted using X-ray photoelectron spectroscopy (XPS). Finally, the morphology of the thin films was observed using scanning electron microscopy (SEM).
| Type: | Thesis (Doctoral) |
|---|---|
| Qualification: | Eng.D |
| Title: | Zinc Oxide Thin Films for Optoelectronic Applications |
| Open access status: | An open access version is available from UCL Discovery |
| Language: | English |
| Additional information: | Copyright © The Author 2025. Original content in this thesis is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) Licence (https://creativecommons.org/licenses/by-nc/4.0/). Any third-party copyright material present remains the property of its respective owner(s) and is licensed under its existing terms. Access may initially be restricted at the author’s request. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10204704 |
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