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- Browsing Theses and Dissertations (Physics) by Issue Date
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Browsing Theses and Dissertations (Physics) by Issue Date
Now showing items 1-20 of 194
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(University of Pretoria, 1994)The beginning of the space-age in the 1950s led to interest in the effects of radiation on semiconductors. The systematic investigation of defect centres in semiconductors began in earnest over 30 years ago. In addition ...
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(University of Pretoria, 1995)The importance of ion implantation in physics and technology has steadily increased over the years. It is a reliable technique to introduce species into a target, altering the chemical, metallurgical, optical and electronic ...
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(University of Pretoria, 2006-02-23)Cadmium sulphide (CdS) films were electrodeposited from an aqueous electrolytic solution onto indium tin oxide and fluorine doped tin oxide substrates, commonly used in photovoltaic applications. The CdS films were deposited ...
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(University of Pretoria, 2006-04-07)The accurate knowledge of the implantation profiles is of considerable interest for testing theoretical models on the stopping of ions in matter, as well as for many important applications in metallurgy and semiconductor ...
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(University of Pretoria, 2006-05-05)The presence of the hydrogen complex in Mg-doped GaN poses serious threats for the technological development of blue and ultraviolet light- emitting diodes and lasers. Since hydrogen is a difficult element to work with and ...
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(University of Pretoria, 2006-05-05)In this work tunability, implantation damage and recovery of GaAs doping superlattices implanted with hydrogen ions were studied. The applicability of two models of the optical properties of semiconductors was also ...
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(University of Pretoria, 2006-05-20)Please read the abstract in the section front of this document.
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(University of Pretoria, 2006-11-30)Despite the poor understanding of charge transfer in conducting polymers, conducting-polymer-based devices have achieved considerable commercial success. This success is based largely on the reproducibility of the measurable ...
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(University of Pretoria, 2006-11-30)The electrically active defects introduced in GaAs by electron beam deposition (EB) of Ta were characterised. The effect of electron beam deposition on the electrical properties of GaAs was evaluated by current-voltage ...
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(University of Pretoria, 2006-11-30)Please read the abstract in the section front of this document
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(University of Pretoria, 2006-11-30)The study of semiconductor materials and more recently, artificially struc¬tured materials, is important for both scientific and industrial purposes. Many techniques have been developed to characterize the electronic ...
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(University of Pretoria, 2006-12-04)Please read the abstract in the section 00front of this document
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(University of Pretoria, 2007)Due to its great importance, both from the fundamental and from the practical points of view, it is imperative that the concept of entanglement is explored. In this thesis I investigate the connection between information ...
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(University of Pretoria, 2007-02-02)This study extended existing research on structured problem solving into disadvantaged South African classrooms. Sixteen disadvantaged urban South African high schools participated in a quasi-experimental study to investigate ...
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(University of Pretoria, 2007-02-06)The bicyclic substrates 1-oxo-2,8-diaryl-2,5,8-triaza-1<font face="symbol">l</font face>5-phosphabicyclo[3.3.0]-octane 3 were studied before. The molecular rearrangement of the alcoholysis product of 3 (the eight-membered ...
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(University of Pretoria, 2007-04-25)Please read the abstract in the section 00front of this document
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(University of Pretoria, 2007-05-17)Please read the abstract in the section 00front of this document
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(University of Pretoria, 2007-06-18)Since the development of deep level transient spectroscopy (DLTS) in the 1970’s by Lang and others, the technique has become a powerful analytical tool to characterise the electrical properties of defects in semiconductors. ...
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(University of Pretoria, 2007-08-13)A fully automated Temperature Dependent Hall (TDH) measurement setup has been assembled for the purposes of this study. This TDH setup is capable of measuring samples in the 20 K to 370 K temperature range. Sample sizes ...
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(University of Pretoria, 2008-04-24)The maximum entropy principle, pioneered by Jaynes, provides a method for finding the least biased probability distribution for the description of a system or process, given as prior information the expectation values of ...
Now showing items 1-20 of 194