Speaker
Mr
Selepe Joel Motloung
(University of the Free State)
Description
Terbium activated lanthanum phosphovanadate phosphor powders were synthesized using solution combustion method. The concentration of terbium was varied from 1 – 10 mol %. The X-ray diffraction (XRD) indicated that all different concentrations exhibit the same trend, implying that dopant concentration on host did not affect crystal structure. Scanning electron microscopy (SEM) images show that the prepared phosphors consisted of agglomeration of particles of different shapes but when samples are put under high temperatures, clear shapes appeared. Energy dispersive x-ray spectroscopy (EDS) confirmed the presence of all main elements forming the desired compound. The band gap energies were estimated from Kubelka-Munk plot and they were found to range from 3.1 to 4.3 eV. The photoluminescence (PL) spectra show four emission peaks corresponding to transitions of terbium. The optimum concentration for this work was found to be 7 mol %. These materials are evaluated as possible candidates to improve the power conversion efficiency of dye sensitized solar cells.
Apply to be<br> considered for a student <br> award (Yes / No)?
No
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
N/A
Main supervisor (name and email)<br>and his / her institution
Tshabalala KG
tshabalalakg@ufs.ac.za
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
Yes
Primary author
Mr
Teboho Moloi
(University of the Free Sate)
Co-authors
Dr
Kamohelo George Tshabalala
(University of the Free State)
Prof.
Odireleng Ntwaeaborwa
(University of the Witwatersrand)
Mr
Selepe Joel Motloung
(University of the Free State)
