Speaker
Main supervisor (name and email)<br>and his / her institution
Prof.B.F Dejene
dejenebf@qwa.ufs.ac.za
Apply to be<br> considered for a student <br> award (Yes / No)?
yes
Abstract content <br> (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>
BaCO3:1% Eu3+,2% Dy3+ powders were synthesized by sol-gel process at a relatively low temperature ~ 80 0C. Metal nitrates were used as the source of metal ions and citric acid as a chelating agent. The Catalyst/Ba mole fraction in the solution were varied from 1.0 - 2.5 during synthesis. The annealed powder samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL) spectroscopy. The XRD data revealed that the annealed samples consist of orthorhombic BaCO3 with BaO impurities. Morphology of the phosphor was influence by the Catalyst/Ba mole fraction. PL spectra indicated that there are emission peaks at different wavelength positions. The most intense peak is at 616 nm, which is attributed to the 5D0-7F2 transitions of Eu3+.
Keywords: Luminescence; BaCO3:1% Eu2+,2% Dy3+; Catalyst/Ba; Sol-gel
Level for award<br> (Hons, MSc, <br> PhD)?
Msc
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
yes
