Zhao, Donglei;
(2023)
Transparent conducting oxides and other functional thin films grown via aerosol assisted chemical vapour deposition.
Doctoral thesis (Ph.D), UCL (University College London).
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Abstract
This thesis describes the preparation and characterisation of different functional thin films, with the main focus being transparent conducting oxide (TCO) thin films including both n-type and p-type, but also other functional thin films (such as catalytic thin films used in the oxygen evolution reaction (OER)) grown via aerosol assisted chemical vapour deposition (AACVD). The main aim to this work was to discover and investigate more suitable functional thin films (TCOs and catalytic materials) via the film preparation method, AACVD. The synthetic route of all the functional thin films used in this thesis is AACVD, which is one specialized form of CVD that is cost effective and easily scalable, operating at ambient pressure. In this thesis, Mo-, P- and B-doped zinc oxide (ZnO) thin films have been investigated as n-type TCOs, with all films showing low resistivities of 2.6 × 10-3 Ω.cm, 6.0 × 10-3 Ω.cm and 5.10 × 10-3 Ω.cm, respectively. The optical properties also reached over 75% as transmittance in the visible area for all doped thin films. Boron phosphide (BP) thin films were synthesized and investigated as a p-type TCO, although the results indicated that BP may not be an ideal p-type material and further doping investigations were not investigated. P-doped molybdenum disulfide (MoS2) thin films have been considered as potential catalytic materials in the OER area. The MoS2 thin films with 1 mol.% P doping displayed superior catalytic performance of OER process with lowest overpotential at 319 mV for 10 mA cm-2 as current density and 173 mV for 10 mA mg-1 as current density, respectively, in 1M KOH medium. Moreover, the mass activity was also high at 1000 A g-1 with small overpotential at 450 mV, which suggested the doping method could improve the properties of thin films through AACVD.
| Type: | Thesis (Doctoral) |
|---|---|
| Qualification: | Ph.D |
| Title: | Transparent conducting oxides and other functional thin films grown via aerosol assisted chemical vapour deposition |
| Open access status: | An open access version is available from UCL Discovery |
| Language: | English |
| Additional information: | Copyright © The Author 2023. 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/10170116 |
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