Edwards, Zach;
(2025)
Self-assembly of Organic Semiconductors
through Non-Contact Vapour-guided
Deposition.
Masters thesis (M.Phil), UCL (University College London).
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Abstract
Crystallisation is a critical factor in the performance of organic semiconductors, as it directly influences charge transport properties and overall device efficiency. Achieving high crystallinity and uniform molecular alignment within organic semiconductor crystals and films is essential for optimising their functionality in electronic devices. However, traditional deposition methods often struggle with controlling crystallisation, leading to defects and inconsistencies that hinder the performance of organic field-effect transistors and other devices. Addressing these challenges, this thesis introduces a novel non-contact vapour-guided deposition technique designed to enhance crystallisation control and improve the performance of organic semiconductors. This research focuses on the synthesis and characterisation of water-soluble and fluorinated naphthalene diimide and perylene diimide derivatives. The vapour-guided deposition technique developed in this work manipulates the self-assembly processes of these compounds, leading to the formation of highly ordered single crystals. These crystals are compared against those produced by traditional methods. Furthermore, the thesis studies the effects of various deposition parameters, such as droplet movement speeds, on the crystallisation process. The results show that the non-contact vapour-guided deposition technique provides additional control over crystal growth which may lead to scalable and reproducible methods for fabricating high-performance organic semiconductor crystals and films. The findings of this research advance the understanding of the fundamental principles of organic semiconductor crystallisation and offer practical solutions to existing challenges in the field. The novel techniques and insights developed here have the potential to drive future innovations in organic electronics.
| Type: | Thesis (Masters) |
|---|---|
| Qualification: | M.Phil |
| Title: | Self-assembly of Organic Semiconductors through Non-Contact Vapour-guided Deposition |
| 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/10206165 |
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