Now showing items 11-16 of 16
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, ...
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 ...
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 ...
A theoretical and experimental investigation on the effect that slow heating and cooling has on the inter-diffusion parameters of Cu/Ni thin films
(University of the Free State, 2010)
Thin film diffusion studies often involve a surface sensitive analysis technique combined with ion erosion to produce a depth profile of a sample. Such studies compare the depth profile of a reference sample to the depth ...
Luminescence properties of Y2O3:Bi3+ as powder and thin film phosphor for solar cell application
(University of the Free State, 2015-07)
The luminescent properties of the bismuth doped yttrium oxide (Y2-xO3:Bix) phosphor material was investigated as a powder and as thin films for possible application as a down-conversion material for solar cells. The goal ...
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 ...