8-12 July 2013
Africa/Johannesburg timezone
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Sol-gel synthesis and characterization of terbium ion doped zinc oxide nanoparticles

Presented by Mr. Guy Leba KABONGO on 9 Jul 2013 from 17:40 to 18:40
Type: Poster Presentation
Session: Poster1
Track: Track A - Division for Condensed Matter Physics and Materials

Abstract

Zinc oxide (ZnO) nanoparticles doped with terbium (1 mol %) was synthesized by sol-gel process. The samples were characterized by X-ray diffraction (XRD), Ultra Violet – Visible (UV-VIS) spectroscopy and Photoluminescence (PL) spectroscopy. The XRD patterns revealed that the diffraction peaks of both undoped and doped samples were readily indexed to ZnO wurtzite structure without any other phase and that the prepared materials were of crystalline nature. The UV-VIS was used to study the absorption characteristic of the samples. Infrared absorption spectra were also measured and discussed. The PL study revealed that Tb3+ ions were emitting in the host through the f-f internal orbital transitions. It was also observed that the radiative transitions from the 5D4 state to 7Fj (j=6, 5, 4, 3, 2) state of Tb3+ appeared at 501 nm, 542 nm, 604 nm, 652 nm, 702 nm position, respectively. Moreover, 5D4-7F5 (542 nm) electric dipole transition was the most intensive. The optical properties of the as prepared and annealed samples are compared. *Corresponding author. Tel.: +2712 429 2716; Fax: +2712 429 3643; Email: gmhlongo@csir.co.za (G.H.M); dhlamms@unisa.ca.za (M.S.D)

Award

Yes

Level

MSc

Supervisor

Prof Mokhotjwa S Dhlamini, dhlamms@unisa.ac.za, University of South Africa

Paper

Yes

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