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Characterization of Gd2O2S: Tb³+ phosphor powder and thin films
(University of the Free State, 2011-06)
Under Ultra violet (UV), cathode-ray and X-ray excitation, terbium activated rare earth oxysulphide (Gd2O2S:Tb3+) phosphors shows bright green luminescence. Due to its superior luminescent performance, Gd2O2S:Tb3+ phosphor ...
Characterization of Y3(Al,Ga)5O12:Ce3+ phosphor thin films prepared by pulsed laser deposition
(University of the Free State, 2013-11)
The morphological and luminescent properties of Y3(Al,Ga)5O12:Ce3+ powder phosphor were investigated. Scanning Electron Microscopy (SEM) revealed the phosphor’s agglomerated particles with a size ranging from 0.4μm to ...
Luminescent properties of Y2SiO5:Ce thin films
(University of the Free State, 2010-05)
The luminescent properties of yttrium silicate doped with cerium (Y2SiO5:Ce) phosphor thin films were investigated. A detailed investigation (cathodoluminescence (CL), photoluminescence (PL) and Gaussian peak fits) was ...
Characterization of SrAl₂O₄:Eu²⁺,Dy³⁺ nano thin films prepared by pulsed laser deposition
(University of the Free State, 2010-11)
English: Thin films of SrAl2O4:Eu2+,Dy3+ phosphor were deposited on silicon (Si (100)) substrates using a 248 nm KrF pulsed laser. Deposition parameters, namely; substrate temperature, pulse repetition rate, number of laser ...
Theoretical and experimental investigation on surface segregation of Cu-Ni(S) bulk and thin film alloys
(University of the Free State, 2017-07)
In this study, the surface segregation in a Ni-Cu alloywasinvestigated by modeling the segregation process theoreticallyand also measuring it experimentally. This was performedfor abulkcrystaland thin films. In addition ...
Monte Carlo simulation and characterisation of phase formation in Pt-based alloy thin films
(University of the Free State, 2010-06)
English: From Icarus’ mythical flight to escape Crete to manned space flight to the moon,
mankind’s dream to fly has impacted this world immensely. Technological
advancements made in metallurgy and alloy development has ...
Kinetic Monte Carlo simulation of the growth of gold nanostructures on a graphite substrate
(University of the Free State, 2006-06)
Nanotechnology has, without a doubt, ushered in a new era of technological convergence and holds the promise of making a profound impact on the way research in physics, chemistry, materials science, biotechnology etc. are ...
Study on luminescence and structural properties of vanadates phosphors
(University of the Free State, 2016-01)
A self-activated yellow emitting zinc vanadate (Zn2 Y20 1) was synthesized by combustion
method. The influence of the processing parameters such as synthesis temperature and
dopants concentration on the structure, ...
Luminescence investigations of CaS:Eu2+ powder and pulsed laser deposited thin films for application in light emitting diodes
(University of the Free State, 2015-06)
The main objective of this thesis was to investigate the luminescent properties of commercial CaS:Eu2+ powder and pulsed laser deposited thin films for application in light emitting diodes. X-ray diffraction (XRD), X-ray ...
Structural and luminescence properties of re doped fluoride and silicate phosphors
(University of the Free State (Qwaqwa Campus), 2017-04)
This work covers several aspects of rare earth activated silicate and fluoride commercial phosphor powders and thin films. All the films were synthesized by pulsed laser deposition technique using Nd- YAG laser and ...