Speaker
Main supervisor (name and email)<br>and his / her institution
Prof. O.M Ntwaeaborwa
Apply to be<br> considered for a student <br> award (Yes / No)?
No
Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)
No
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>
LaV1-xPxO4: 1.0 mol % Dy3+ (x=0.0, 0.25, 0.5, 0.75, and 1.0) phosphor powders were prepared by combustion method with different vanadate to phosphate molar concentration. The phosphor powder samples were characterized using x-ray diffraction (XRD) for phase identification. The XRD results for samples with x = 0.0 and x = 1.0 revealed a standard monoclinic structure of LaVO4 and LaPO4 respectively. The diffuse reflectance spectra indicates a broad absorption band around the UV region ranging from 200 nm to 550 nm. The photoluminescence properties were investigated using a Cary Eclipse fluorescence spectrophotometer at the excitation wavelength of 227 nm. Two characteristic emission peaks of Dy3+ were observed at λ = 478 nm (blue) and λ = 572 nm (yellow) corresponding to 4F9/2 - 6H15/2 and 4F9/2 - 6H13/2 transition of Dy3+, respectively. Furthermore, the PL intensity is the highest when x = 0.5.
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
N/A
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
Yes