Solution combustion synthesis of bluish-green BaAl2O4: Eu2+, Dy3+ phosphors

Bluish-green phosphors based on Eu and Dy-doped BaAl2O4 were prepared by solution combustion synthesis, without any additional annealing step, with a view to obtain high intensity of the emitted light and long afterglow. The mean crystallite size of the combustion-synthesized samples varied between...

Full description

Saved in:
Bibliographic Details
Published in:Ceramics international 2015-03, Vol.41 (2), p.3186-3190
Main Authors: Ianoş, Robert, Lazău, Radu, Boruntea, Renato Cristian
Format: Article
Language:English
Subjects:
A. Powders: chemical preparation
Afterglows
Annealing
B. Non-destructive evaluation
B. X-ray methods
Band spectra
C. Optical properties
Combustion synthesis
Crystal defects
Crystallites
Deterioration
Emission
Phosphor materials
Phosphors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Bluish-green phosphors based on Eu and Dy-doped BaAl2O4 were prepared by solution combustion synthesis, without any additional annealing step, with a view to obtain high intensity of the emitted light and long afterglow. The mean crystallite size of the combustion-synthesized samples varied between 72 and 82nm and the BET surface area was around 1.4m2/g. The emission spectra of the obtained samples present a single band with a maximum at 499nm. Increasing the Eu2+ proportion in the samples leads to a slight increase of the emission intensity, whilst increasing the Dy3+/Eu2+ ratio from 0/1 to 3/1 contributes to a sharp increase of the emission band intensity. The samples containing Dy3+ show significantly improved afterglow as compared to the sample doped only with Eu2+ and the wavelength of the emitted radiation remains the same. Supplementary annealing (air atmosphere) of the samples obtained from the combustion reaction was found to lead to a deterioration of the optical properties, as a consequence of reducing the concentration of structural defects.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2014.10.171