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Electronic properties and microstructure of nanoparticulate silicon systems for diode applications
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Physics
2015
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| _version_ | 1867613312417529856 |
|---|---|
| access_status_str | Open Access |
| author | Männl, Ulrich Philipp |
| author2 | Härting, Margit |
| author_browse | Härting, Margit Männl, Ulrich Philipp |
| author_facet | Härting, Margit Männl, Ulrich Philipp |
| author_sort | Männl, Ulrich Philipp |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/12978 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:34:08.683Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | Department of Physics |
| publisherStr | Department of Physics |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/12978 Electronic properties and microstructure of nanoparticulate silicon systems for diode applications Männl, Ulrich Philipp Härting, Margit Britton, David T Physics Includes bibliographical references. In printed electronics the use of semiconducting silicon nanoparticles allows more than the simple printing of conductive materials. It gives the possibility of fabricating robust and inexpensive, active components. This work presents the design, fabrication, and characterization of Schottky barrier diodes using silicon nanoparticulate composites. Within this work it could be shown, that silicon nanoparticles produced by high energy milling can be used to replace the pigment in water-based graphic inks, which on curing have unique semiconducting properties, arising from the transport of charge through a percolation network of crystalline silicon nanoparticles. In this thesis scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, and mid-infrared scanning near-field optical microscopy (IR s-SNOM) were employed to investigate the micro-scale as well as the meso-scale structure of the printed particle networks and, more importantly the structure of the interface between particles. A close contact between lattice planes of different particles was observed, without the presence of a thick intervening oxide layer. Altogether, the results presented in this thesis suggest that highly doped silicon nanoparticles produced by high energy milling are suitable to be used for Schottky barrier diodes fabricated by screen printing. The saturation current of the diodes was about 0.11µA for reverse bias voltages up to 5V with an ideality factor of 10.6, and rectification ratios of approximately 10⁴ were observed. 2015-05-28T07:02:37Z 2015-05-28T07:02:37Z 2014 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/12978 eng application/pdf Department of Physics Faculty of Science University of Cape Town |
| spellingShingle | Physics Männl, Ulrich Philipp Electronic properties and microstructure of nanoparticulate silicon systems for diode applications |
| thesis_degree_str | Doctoral |
| title | Electronic properties and microstructure of nanoparticulate silicon systems for diode applications |
| title_full | Electronic properties and microstructure of nanoparticulate silicon systems for diode applications |
| title_fullStr | Electronic properties and microstructure of nanoparticulate silicon systems for diode applications |
| title_full_unstemmed | Electronic properties and microstructure of nanoparticulate silicon systems for diode applications |
| title_short | Electronic properties and microstructure of nanoparticulate silicon systems for diode applications |
| title_sort | electronic properties and microstructure of nanoparticulate silicon systems for diode applications |
| topic | Physics |
| url | http://hdl.handle.net/11427/12978 |
| work_keys_str_mv | AT mannlulrichphilipp electronicpropertiesandmicrostructureofnanoparticulatesiliconsystemsfordiodeapplications |