Speaker
Mr
Tresor MATINDI
(University of the Witwatersrand)
Description
The formation of shallow n-type dopants in diamond is one of the major challenges for the electronic application of diamond. n-type behavior in diamond is observed for substitutional phosphorus and nitrogen, with activation energies of ~0.62 and 1.7 eV respectively. It has been theoretically found that the substitution of N-O molecule into the diamond lattice induces a shallow defects below the conduction band edge which may lead to n-type conductivity.
In this project we are exploring the possibility of achieving n-type conductivity in diamond by conducting an experimental investigation on the interaction between nitrogen and oxygen in the diamond as well as the related defects. This involves placing nitrogen and oxygen impurities close to each other into the diamond lattice by means of ion implantation; which has the advantage to provide greater accuracy of depth and location of ions in the host material.
Optical spectroscopy and electrical characterization techniques are used to investigate the nature and behavior of the defects induced by the implantation of N-O ions into type IIa CVD diamond samples.
In this presentation the experimental results of photoluminescence, Raman spectroscopy and cathodoluminescence will be discussed.
Supervisor details<br><b>If not a student, type N/A.</b><br>Student abstract submision<br>requires supervisor permission:<br>please give their name,<br> institution and email address.
Prof S.R Naidoo and Prof M. Ntwaeaborwa
University of Witwatersrand.
mervin.naidoo@wits.ac.za and martin.ntwaeaborwa@wits.ac.za
| Please confirm that you<br>have carefully read the<br>abstract submission instructions<br>under the menu item<br>"Call for Abstracts"<br><b>(Yes / No)</b> | yes |
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| Consideration for<br>student awards<br><b>Choose one option<br>from those below.</b><br>N/A<br>Hons<br>MSc<br>PhD | PhD |
Primary authors
Prof.
Odireleng Ntwaeaborwa
(University of the Witwatersrand)
Prof.
Shunmugam Ramsamy Naidoo
(Wits University)
Mr
Tresor MATINDI
(University of the Witwatersrand)
