7-11 July 2014
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=16&confId=34"><font color=#0000ff>SAIP2014 Proceedings published on 17 April 2015</font></a>

Effects of Catalyst/Ba mole fraction on the structure and luminescence properties of BaCO3:1% Eu3+,2% Dy3+ phosphors synthesized using sol-gel process.

9 Jul 2014, 17:10
1h 50m
D Ring ground level

D Ring ground level

Board: A.294
Poster Presentation Track A - Division for Physics of Condensed Matter and Materials Poster2

Speaker

Ms Angelina Seithati Tebele (University of the Free State)

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

yes

Abstract content <br> &nbsp; (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

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> &nbsp; award (Yes / No)?

yes

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

Msc

Primary author

Ms Angelina Seithati Tebele (University of the Free State)

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Peer reviewing

Paper