Nazligul, Ahmet Sencer;
(2023)
Exploring alternative renewable energy applications for kesterite materials through doping and cation substitution.
Doctoral thesis (Ph.D), UCL (University College London).
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Abstract
Given the global challenges of the energy crisis and global warming, research in renewable energy has garnered significant attention. As a semiconductor with good optoelectronic properties and containing only earth-abundant and environmentally friendly elements, kesterite Cu2ZnSnS4 (CZTS) shows great potential in varied applications for renewable energy generation. This thesis centres on tuning the material properties of CZTS to optimise the material for alternative renewable energy generation applications. CZTS thin films were fabricated using non-vacuum techniques like spin coating and spray pyrolysis in the air. The research in this thesis involves three distinct experimental chapters, each aimed at modifying the material properties of CZTS with specific doping and cation substitutions. Chapter 3 concentrates on the deposition optimisation of CZTS in terms of annealing temperature and explores the effects of simple solution-based sodium doping on the crystal structure, morphology, and optoelectrical properties of CZTS. Chapter 4 studies the application of CZTS as thermoelectric materials. This chapter characterizes the impact of aluminium doping on the thermoelectrical properties of CZTS, resulting in enhanced thermoelectric properties through Al doping. Lastly, in Chapter 5, CZTS is applied as a hole transport layer to improve the performance of fully inorganic perovskite solar cells. Germanium substitution is used to fine-tune the band structure of kesterite and adjust the energy alignment at the CZTS/CsPbBr3 interface, which results in increased charge collection and lowered charge recombination of fully inorganic perovskite CsPbBr3 solar cells.
| Type: | Thesis (Doctoral) |
|---|---|
| Qualification: | Ph.D |
| Title: | Exploring alternative renewable energy applications for kesterite materials through doping and cation substitution |
| 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 > MAPS Faculty Office UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10181749 |
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