SAIP2017

The energy transfer between Gadolinium (Gd3+) ion and Cerium (Ce3+) ion

4 Jul 2017, 17:10

1h 50m

3rd and 4th floor passages (Engineering Building 51)

Board: 17

Poster Presentation Track A - Division for Physics of Condensed Matter and Materials Poster Session 1

Speaker

Mr Thabang Johannes Nkosi (University of Johannesburg)

Description

The series of Ca3(PO4)2 powder with Gd3+ ion were synthesized using combustion method. The powder phosphor has two sets which are as prepared (at 600±250C) and annealed (1000±50C). The concentration of the Gd3+ ion was varied from 0.0 to 7.0 mol %. The characterization techniques used are X-ray diffraction (XRD), photoluminescence (PL), Ultra-violet visible spectroscopy (UV-Vis), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy and Energy X-ray Dispersive Spectroscopy(SEM-EDS). XRD was used to confirm Ca3(PO4)2 is rhombohedral structure. PL shows when Ca3-x(PO4)2: xGd3+ excited 274 nm and it emit at 313nm (narrow band for phototherapy use). The EDS confirm the present of elements in the samples. The particle morphologies of the series of Ca3(PO4)2 phosphors were investigated by using the SEM. The possible application will be mercury free lamp for phototherapy.

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

YES

Main supervisor (name and email)<br>and his / her institution

Martin Ntwaeaborwa
ntwaeab@gmail.com
University of the Witwatersrand

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

N

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

MSc