Photoluminescence characteristics of ZnO doped with Eu3+ powders
Fang, Te-Hua and Chang, Yee-Shin and Ji, Liang-Wen and Prior, Stephen D. and Water, Walter and Chen, Kuan-Jen and Fang, Ching-Feng and Fang, Chun-Nan and Shen, Siu-Tsen (2009) Photoluminescence characteristics of ZnO doped with Eu3+ powders. Journal of physics and chemistry of solids, 70 (6). pp. 1015-1018. ISSN 0022-3697
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In this work, we have investigated the photoluminescence spectra of europium-doped zinc oxide crystallites prepared by a vibrating milled solid-state reaction method. X-ray diffraction, scanning electron microscopy, luminescence spectra and time-resolved spectra analysis were used to characterize the synthetic ZnO:Eu3+ powders. XRD results of the powders showed a typical wurtzite hexagonal crystal structure. A second phase occurred at 5 mol% Eu2O3-doped ZnO. The 5D0–7F1 (590 nm) and 5D0–7F2 (609 nm) emission characteristics of Eu3+ appeared after quenching with more than 1.5 mol% Eu2O3 doping. The Commission Internationale d’Eclairage (CIE) chromaticity coordinates of a ZnO:Eu3+ host excited at λex=467 nm revealed a red-shift phenomenon with increase in Eu3+ ion doping. The lifetime of the Eu3+ ion decreased as the doping concentration was increased from 1.5 to 10 mol%, and the time-resolved 5D0→7F2 transition presents a single-exponential decay behavior.
|Research Areas:||A. Middlesex University Schools and Centres > School of Science and Technology > Computer and Communications Engineering|
|Citations on ISI Web of Science:||6|
|Deposited On:||15 Oct 2009 11:30|
|Last Modified:||13 May 2014 15:36|
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