DSpace
 

Researchspace >
General science, engineering & technology >
General science, engineering & technology >
General science, engineering & technology >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5624

Title: Dependence of photoluminescence (PL) emission intensity on Eu3+ and ZnO concentrations in Y2O3:Eu3+ and ZnO·Y2O3:Eu3+ nanophosphors
Authors: Mhlongo, GH
Dhlamini, MS
Swart, HC
Ntwaeaborwa, OM
Hillie, KT
Keywords: Phosphors
Concentration quenching effect
Energy transfer
Issue Date: Aug-2011
Publisher: Elsevier
Citation: Mhlongo, GH, Dhlamini, MS, Swart, HC, Ntwaeaborwa, OM and Hillie, KT. 2011. Dependence of photoluminescence (PL) emission intensity on Eu3+ and ZnO concentrations in Y2O3:Eu3+ and ZnO·Y2O3:Eu3+ nanophosphors. Optical Materials, vol. 33(10), pp 1495-1499
Series/Report no.: Workflow;7876
Workflow;8119
Abstract: Y2O3:Eu3+ and ZnO·Y2O3:Eu3+ nanophosphor powders with different concentrations of Eu3+ ions were synthesized by a sol–gel method and their luminescence properties were investigated. The red photoluminescence (PL) from Eu3+ ions with the main emission peak at 612 nm was observed to increase with Eu3+ concentration from 0.25 to 0.75 mol% and decreased notably when the concentration was increased to 1 mol%. The decrease in the PL intensity at higher Eu3+ concentrations can be associated with concentration quenching effects. The red emission at 612 nm was shown to increase considerable when ZnO nanoparticles were incorporated in Y2O3:Eu3+ while green emission from ZnO was suppressed. The increase is attributed to energy transfer from ZnO to Eu3+.
Description: Copyright: 2011 Elsevier. This is an ABSTRACT ONLY.
URI: http://www.sciencedirect.com/science/article/pii/S0925346711001303
http://hdl.handle.net/10204/5624
ISSN: 0925-3467
Appears in Collections:National Centre for nano-structured materials
Nanotechnology
General science, engineering & technology

Files in This Item:

File Description SizeFormat
Mhlongo_2011_ABSTRACT ONLY.pdf183.8 kBAdobe PDFView/Open
View Statistics

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

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback