Novel phosphorus precursors to group III-V semiconductor nanoparticles
<p>The development of novel phosphorus precursors to group III-V semiconductor nanoparticles is described in this thesis. An overview of semiconductor nanoparticles, colloquially referred to as quantum dots (QDs), is presented in <strong>Chapter 1</strong>, including strategies for...
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| Beste egile batzuk: | |
| Formatua: | Thesis |
| Hizkuntza: | English |
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2023
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| _version_ | 1826317412811669504 |
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| author | Howley, J |
| author2 | Davis, J |
| author_facet | Davis, J Howley, J |
| author_sort | Howley, J |
| collection | OXFORD |
| description | <p>The development of novel phosphorus precursors to group III-V semiconductor nanoparticles is described in this thesis. An overview of semiconductor nanoparticles, colloquially referred to as quantum dots (QDs), is presented in <strong>Chapter 1</strong>, including strategies for the preparation of InP QDs from typical phosphorus precursors.</p>
<p><strong>Chapter 2</strong> explores the reactivity of the parent phosphinecarboxamide (H2PC(O)NH2) in solution towards common InP QD precursors. The preparation of InP clusters and a novel N-functionalised phosphinecarboxamide using H2PC(O)NH2 is discussed. Both H2PC(O)NH2 and N-functionalised phosphinecarboxamides are found to be effective sources of PH3 in solution upon thermal decomposition in pyridine at 105oC.</p>
<p><strong>Chapter 3</strong> describes the use of an N-functionalised phosphinecarboxamide as a novel air-stable phosphorus precursor to core/shell In(Zn)P/ZnS QDs. A synthetic protocol is optimised to afford core/shell In(Zn)P/ZnS QDs with size-dependant photoluminescence emission maxima between 550 and 650 nm, with full width at half maxima (FWHM) between 68 and 128 nm.</p>
<p><strong>Chapter 4</strong> explores the reactivity of N-, N,N-, and P-functionalised phosphinecarboxamides in solution. The effect of phosphinecarboxamide side-chain functionalisation on reactivity is also discussed.</p>
<p>Finally, <strong>Chapter 5</strong> discusses the use of functionalised phosphinecarboxamides for the preparation of In(Zn)P/ZnS QDs and the unique size control that they afford. Carboxylate functionalised phosphinecarboxamides are used to prepare core/shell In(Zn)P/ZnS QDs with size-dependant photoluminescence emission maxima between 550 and 620 nm and FWHM between 83 and 114 nm. Additionally, the unexpected use of a P-functionalised phosphinecarboxamide as an air-stable precursor to size-uniform InP QDs is described, which display a photoluminescence maximum at 546 nm and a FWHM of 75 nm.</p> |
| first_indexed | 2024-04-23T08:25:46Z |
| format | Thesis |
| id | oxford-uuid:7d77b19d-6fae-4f64-a342-926398a6d927 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2025-02-19T04:38:00Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | oxford-uuid:7d77b19d-6fae-4f64-a342-926398a6d9272025-02-10T14:13:47ZNovel phosphorus precursors to group III-V semiconductor nanoparticlesThesishttp://purl.org/coar/resource_type/c_db06uuid:7d77b19d-6fae-4f64-a342-926398a6d927ChemistrySemiconductorsChemistry, InorganicPhosphorusSemiconductor nanocrystalsQuantum dotsSemiconductors--CharacterizationNanostructured materialsIndium phosphidePhotoluminescenceEmission spectroscopyMaterialsSynthesisNanocrystalsEnglishHyrax Deposit2023Howley, JDavis, JGoicoechea, J<p>The development of novel phosphorus precursors to group III-V semiconductor nanoparticles is described in this thesis. An overview of semiconductor nanoparticles, colloquially referred to as quantum dots (QDs), is presented in <strong>Chapter 1</strong>, including strategies for the preparation of InP QDs from typical phosphorus precursors.</p> <p><strong>Chapter 2</strong> explores the reactivity of the parent phosphinecarboxamide (H2PC(O)NH2) in solution towards common InP QD precursors. The preparation of InP clusters and a novel N-functionalised phosphinecarboxamide using H2PC(O)NH2 is discussed. Both H2PC(O)NH2 and N-functionalised phosphinecarboxamides are found to be effective sources of PH3 in solution upon thermal decomposition in pyridine at 105oC.</p> <p><strong>Chapter 3</strong> describes the use of an N-functionalised phosphinecarboxamide as a novel air-stable phosphorus precursor to core/shell In(Zn)P/ZnS QDs. A synthetic protocol is optimised to afford core/shell In(Zn)P/ZnS QDs with size-dependant photoluminescence emission maxima between 550 and 650 nm, with full width at half maxima (FWHM) between 68 and 128 nm.</p> <p><strong>Chapter 4</strong> explores the reactivity of N-, N,N-, and P-functionalised phosphinecarboxamides in solution. The effect of phosphinecarboxamide side-chain functionalisation on reactivity is also discussed.</p> <p>Finally, <strong>Chapter 5</strong> discusses the use of functionalised phosphinecarboxamides for the preparation of In(Zn)P/ZnS QDs and the unique size control that they afford. Carboxylate functionalised phosphinecarboxamides are used to prepare core/shell In(Zn)P/ZnS QDs with size-dependant photoluminescence emission maxima between 550 and 620 nm and FWHM between 83 and 114 nm. Additionally, the unexpected use of a P-functionalised phosphinecarboxamide as an air-stable precursor to size-uniform InP QDs is described, which display a photoluminescence maximum at 546 nm and a FWHM of 75 nm.</p> |
| spellingShingle | Chemistry Semiconductors Chemistry, Inorganic Phosphorus Semiconductor nanocrystals Quantum dots Semiconductors--Characterization Nanostructured materials Indium phosphide Photoluminescence Emission spectroscopy Materials Synthesis Nanocrystals Howley, J Novel phosphorus precursors to group III-V semiconductor nanoparticles |
| title | Novel phosphorus precursors to group III-V semiconductor nanoparticles |
| title_full | Novel phosphorus precursors to group III-V semiconductor nanoparticles |
| title_fullStr | Novel phosphorus precursors to group III-V semiconductor nanoparticles |
| title_full_unstemmed | Novel phosphorus precursors to group III-V semiconductor nanoparticles |
| title_short | Novel phosphorus precursors to group III-V semiconductor nanoparticles |
| title_sort | novel phosphorus precursors to group iii v semiconductor nanoparticles |
| topic | Chemistry Semiconductors Chemistry, Inorganic Phosphorus Semiconductor nanocrystals Quantum dots Semiconductors--Characterization Nanostructured materials Indium phosphide Photoluminescence Emission spectroscopy Materials Synthesis Nanocrystals |
| work_keys_str_mv | AT howleyj novelphosphorusprecursorstogroupiiivsemiconductornanoparticles |