Speaker
Mr
Alfred Odirile Mashalane
(UFS)
Description
Optical and structural properties of Y2SiO5:Ce thin films prepared by spin coating.
A Mashalane, HC Swart and MM Duvenhage
Y2SiO5:Ce is a blue emitting phosphor that is used in field emission displays (FED). In this study thin films of Y2SiO5:Ce was prepared by spin coating and their luminescent and structural properties were compared to that of commercially available Y2SiO5:Ce powder.
Thin films of Y2SiO5:Ce were prepared by spin coating on soda lime glass substrates. The concentration of the solution was kept constant while the spinning speed was varied between 500, 1000 and 2000 RPM. X ray diffraction (XRD) was performed on the samples to determine the crystal structure and particle size of the films. Diffuse reflectance measurements were performed to determine the optical bandgap of the films. Photoluminescence (PL) studies were done to determine the excitation and emission wavelength of the various films.
The XRD confirmed the monoclinic crystal phase of Y2SiO5:Ce powder with the two major peaks at -402 and 103 present. The films showed lower intensity of the XRD peaks. The PL showed broad blue emission between 400 and 500 nm.
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.
Supervisor:MM Duvenhage
University of the Free State
email: DuvenhageM@UFS.ac.za
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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 | MSc |
Primary author
Mr
Alfred Odirile Mashalane
(UFS)
