IDR Logo

Please use this identifier to cite or link to this item: http://idr.iitbbs.ac.in/jspui/handle/2008/371
Title: Luminescence properties and decay kinetics of nano ZnO powder doped with cerium ions
Authors: Panda N.R.
Acharya B.S.
Singh T.B.
Gartia R.K.
Keywords: Photoluminescence
PSDL
Sonochemical method
Thermoluminescence
ZnO
Issue Date: 2013
Citation: 27
Abstract: ZnO nanopowders doped with cerium ions (1.2 and 1.5 at. wt.%) were synthesized through soft solution route using ultrasound. Sonication has been found to be an effective way for doping rare earth ions like cerium into ZnO. This was confirmed from energy dispersive analysis of X-rays (EDAX) measurement. Further, optical absorption and photoluminescence (PL) measurements corroborate this finding. X-ray diffraction (XRD) studies show the increase of crystallite size and unit cell volume with doping of cerium ions. Formation of fibrous structure of ZnO:Ce was observed from the transmission electron microscopy (TEM) measurements. Although the structural measurements indicate Ce4+ ion occupying substitutional site in ZnO, PL and absorption studies confirmed the presence of Ce3+ ion in the powder. The coexistence of Ce 3+ and Ce4+ ions has been explained on the basis of conversion of Ce3+ to Ce4+ in the oxidizing environment. Thermoluminescence (TL) and photo-stimulated decay of luminescence (PSDL) decay studies give an idea of various trapping levels present in the band gap of ZnO. These traps release electrons during optical stimulation to give bimolecular kinetics in nano ZnO:Ce powders. � 2012 Elsevier Inc. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jlumin.2012.12.002
http://10.10.32.48:8080/jspui/handle/2008/371
Appears in Collections:Research Publications

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.