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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 ...
Cathodoluminescence degradation and surface characterization of SrGa₂S₄:Ce³⁺ power and thin films
(University of the Free State, 2011-05)
The structure, morphology and luminescent properties of commercial SrGa2S4:Ce3+ phosphor powder and thin films were investigated. The phosphor shows bright blue under ultraviolet (UV) excitation. Measurements were carried ...
Luminescence investigation of trivalent rare earth ions in sol-gel derived SiO₂ and ZnO co-doped SiO₂:Pr³⁺
(University of the Free State, 2011-05)
Tb3+-Pr3+ , Ce3+-Pr3+ , and Eu3+-Pr3+ ion pairs co-doped in SiO2 were successfully synthesized using a sol gel method to produce rare earth activated oxide nanophosphors. Green emitting ZnO nanoparticles were also successfully ...
A comparative study between the simulated and measured cathodoluminescence generated in ZnS phosphor powder
(University of the Free State, 2003-08)
In the past few decades cathode ray tubes (CRTs) have dominated the display market
because of their excellent image quality, ease and economy of manufacture. However
their bulky packaging and high power consumption make ...
CL degradation of Y2SiO5:Ce thin films coated with SnO2
(University of the Free State, 2006-05)
The degradation of the cathodoluminescence (CL) intensity of cerium-doped yttrium silicate (Y 2SiO 5:Ce) phosphor thin films and commercially available Y2SiO5:Ce phosphor powders from Phosphor technology, England, were ...
Red emission of Praseodymium ions (Pr ³⁺)
(University of the Free State, 2011-11)
English: Red glowing phosphors were prepared by adding Pr3+ ions as activators to several oxide host matrixes; CaTiO3, LaTaO4, YTaO4, and GdTaO4. The perovskite CaTiO3:Pr3+ compound is a phosphor that glows with a single ...
Synthesis, characterization and luminescent mechanism of ZnS:Mn²+ nanophosphor
(University of the Free State, 2009-11-30)
ZnS:Mn2+ is commercially used in field emission displays (FEDs) and biological imaging of brain tumors. This study was done to determine the luminescent mechanism of both bulk and nano sized ZnS:Mn2+. Luminescent zinc ...
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 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 ...