from 28 June 2015 to 3 July 2015 (Africa/Johannesburg)
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SAIP2015 Proceeding published on 17 July 2016
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Laser excitation studies and crystal-field analysis of ZnO:Tb3+ and ZnO:Eu3+ powders

Presented by Mr. NKOSIPHILE ANDILE BHEBHE on 30 Jun 2015 from 16:10 to 18:00
Type: Poster Presentation
Session: Poster1
Track: Track A - Division for Physics of Condensed Matter and Materials
Board #: A.417

Abstract

Results from laser excitation studies of Tb<sup>3+</sup> ions and Eu<sup>3+</sup> ions in zinc oxide (ZnO) powders are presented; rare-earth doped ZnO (ZnO:RE<sup>3+</sup>) is currently of great interest as a prospective solid-state laser matrix and for optoelectronic device applications. The chemical bath deposition technique was utilized for synthesizing the ZnO:Tb<sup>3+</sup> and ZnO:Eu<sup>3+</sup> powders. Photoluminescence spectra of the pelleted samples were obtained in the 460 – 900 nm range. The spectra exhibit sharp emission lines superimposed on a broad emission background with 457.9 nm, 476.5 nm and 488.0 nm argon laser-line excitation. The sharp peaks are attributed to the <sup>5</sup>D<sub>4</sub> → <sup>7</sup>F<sub>J</sub> (J = 0, 1, 2, 3, 4, 5, 6) and the <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>J</sub> (J = 0, 1, 2, 3, 4) electronic transitions of Tb<sup>3+</sup> and Eu<sup>3+</sup>, respectively. Crystal-field energy levels for the Tb<sup>3+</sup> ion and the Eu<sup>3+</sup> ion occupying a C<sub>3v</sub> symmetry site were deduced.

Award

YES

Level

MSc

Supervisor

Dr. Marjorie Mujaji Marjorie.Mujaji@wits.ac.za University of the Witwatersrand

Paper

Yes

Permission

Yes

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