4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
Paper Review: Initial screening in progress
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Internal quantum efficiency and energy transfer processes in Ce3+ co-doped ZrO2: Eu3+ nanorods

Presented by Dr. Iorkyaa AHEMEN on 8 Jul 2016 from 11:30 to 11:50
Type: Oral Presentation
Track: Track A - Division for Physics of Condensed Matter and Materials

Abstract

Cerium co-doped ZrO2: Eu3+ nanorods was synthesized by a simple chemical dehydration route and their structural, morphological and optical properties were investigated. Structural studies revealed mixed-phases of monoclinic and tetragonal Bravis lattices. Nanorods of different dimensions were observed on the scanned images. Excitation and absorption spectra revealed the dominance of the Eu3+ - O2- charge transfer states band over the intraconfigurational lines of the activator ion. A broad emission band with center maximum at 465 nm is attributed to both Ce3+ ion and the host band emissions. Electronic transitions in the range 500 nm to 650 nm are assigned to the Eu3+ ion. No significant energy transfer was observed because concentration quenching process dominated the energy transfer process. The internal quantum efficiency decreased with increasing Ce3+ concentration.

Award

No

Level

N/A

Supervisor

Prof. Dejene B.F.; DejeneBF@ufs.ac.za; University of The Free State Qwaqwa Campus Phuthaditjhaba,South Africa

Paper

yes

Permission

yes

Place

Location: Kramer Law building
Address: UCT Middle Campus Cape Town
Room: 4B


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