Singh, Vijay and Chakradhar, R P S and Rao, J L and Kwak, Ho-Young (2011) Photoluminescence and EPR studies of BaMgAl(10)O(17):Eu(2+) phosphor with blue-emission synthesized by the solution combustion method. Journal of Luminescence, 131 (8). pp. 1714-1718. ISSN 0022-2313

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Abstract

A blue phosphor, BaMgAl(10)O(17):Eu(2+), has been synthesized in the furnace at a temperature of 500 C by solution combustion method. The formation of the as-prepared BaMgAl(10)O(17):Eu(2+) phosphor was confirmed by the powder X-ray diffraction technique. The EPR spectrum exhibited an intense resonance signal centered at g=4.63 at 150 mT along with a number of resonances in the vicinity of g > 2.0 and g < 2.0. The number of spins participating in resonance (N) and the susceptibility (c) for the resonance signal at g=4.63 have been calculated as a function of temperature. The excitation spectrum of BaMgAl(10)O(17):Eu(2+) phosphor showed a strong peak near 336 nm (4f(7) ((8)S)-> 5d(1)(t(2g)) transition) with a staircase like structure in the region 376-400 urn owing to crystal field splitting of the Eu(2+) d-orbital. The 336 nm excitation produced a broad blue emission at 450 nm corresponding to 4f(6)5d -> 4f(7) transition. PL studies reveal the two emission centers one at 450 nm and the other at 490 urn in this phosphor. (C) 2011 Elsevier B.V. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Eu(2+) ions; Phosphor; Combustion; Photoluminescence; Electron paramagnetic resonance
Subjects:	Processing Science
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	20 Jan 2012 04:46
Last Modified:	01 Nov 2013 11:34
URI:	http://cgcri.csircentral.net/id/eprint/413

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