4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
Paper Review: Initial screening in progress
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Characterisation of the optical thermometry properties of a phosphor material

Presented by Mr. Lucas ERASMUS on 5 Jul 2016 from 15:20 to 15:40
Type: Oral Presentation
Track: Track F - Applied Physics

Abstract

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.

Award

Yes

Level

MSc

Supervisor

Professor J.J. Terblans, terblansjj@ufs.ac.za , University of the Free State

Paper

No

Permission

Yes

Place

Location: Kramer Law building
Address: UCT Middle Campus Cape Town
Room: LT2


Primary authors

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Co-authors

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