Speaker
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
MSc
Apply to be<br> considered for a student <br> award (Yes / No)?
Yes
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
No
Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)
Yes
Main supervisor (name and email)<br>and his / her institution
Professor J.J. Terblans, terblansjj@ufs.ac.za , University of the Free State
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>
This study is focused on the investigation of the optical thermometry properties of Lanthanum Oxysulphide doped with Europium (La2O2S:Eu) phosphor material by utilising an in-house modified Photo-luminescence (PL) system. After a literature study it was concluded that the optical thermometry properties of phosphor materials can be measured by several techniques. The technique discussed in this presentation is the fluorescence intensity ratio technique where the fluorescence spectra of a phosphor material was obtained and the intensity ratio between two thermally coupled levels was monitored. The peak intensities of the different PL peaks due to the different transitions from Eu3+ in La2O2S:Eu were monitored at different temperatures. It was clear that La2O2S:Eu can be used as a temperature sensor. The viability of La2O2S:Eu as a stable temperature sensor was also evaluated by investigating it’s structural and chemical properties by utilising the X-ray Diffraction and X-Ray Photo-electron Spectroscopy techniques.
