Speaker
Dr
Abdelrhman Mohmmed
(University of the Free State)
Description
In recent years, there has been growing importance focused on research in light emitting diodes (LEDs) because of their long operation lifetime, energy-saving feature and high material stability [1, 2]. During the past few years, white LEDs fabricated using a near ultraviolet (n-UV) LED (380–420 nm) coupled with red, green, and blue phosphors have attracted much attention [2]. Accordingly, it is necessary to develop new blue phosphors that could be effectively excited in the near ultraviolet range especially for wavelengths of 400 nm [1]. The spectroscopic properties of the Bi3+ ion in different hosts have attracted much attention due to its emission wavelength that varies from the ultraviolet to the red region depending on the host matrix [3]. Therefore, with the appropriate matrix, the emission of Bi3+ ions can be used as a candidate for n-UV for LED applications. CaO:Bi3+ phosphor powder was successfully synthesized by the sol-gel combustion method. The structure, morphology and luminescent properties of the phosphor were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), photoluminescence (PL) and cathodoluminescence (CL) techniques.
Are you currently a postgraduate student? (Yes/No)
No
Please provide the name and email address of your supervisor.
Prof H C Swart
SwartHC@ufs.ac.za
Primary author
Dr
Abdelrhman Mohmmed
(University of the Free State)
Co-authors
Prof.
Hendrik Swart
(University of the Free State)
Prof.
Odireleng Ntwaeaborwa
(University of the Free State)
