Speaker
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?
Yes
Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)
Yes
Abstract content <br> (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>
Results from laser excitation studies of Tb3+ ions and Eu3+ ions in zinc oxide (ZnO) powders are presented; rare-earth doped ZnO (ZnO:RE3+) 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:Tb3+ and ZnO:Eu3+ 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 5D4 → 7FJ (J = 0, 1, 2, 3, 4, 5, 6) and the 5D0 → 7FJ (J = 0, 1, 2, 3, 4) electronic transitions of Tb3+ and Eu3+, respectively. Crystal-field energy levels for the Tb3+ ion and the Eu3+ ion occupying a C3v symmetry site were deduced.
Main supervisor (name and email)<br>and his / her institution
Dr. Marjorie Mujaji
Marjorie.Mujaji@wits.ac.za
University of the Witwatersrand
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
MSc
Apply to be<br> considered for a student <br> award (Yes / No)?
YES