Singh, Vijay and Chakradhar, R P S and Rao, J L and Kim, Dong-Kuk (2008) Mn2+ activated MgSrAl10O17 green-emitting phosphor - A luminescence and EPR study. Journal of Luminescence, 128 (9). pp. 1474-1478. ISSN 0022-2313

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Abstract

This paper reports on the luminescence and electron paramagnetic resonance (EPR) investigations on MgSrAl10O17:Mn2+ green-emitting phosphor. Single-phase MgSrAl10O17 was successfully synthesized by the one-step solution combustion route without the need for post-annealing at a higher temperature. Crystallization of the powder was confirmed by X-ray diffraction. The luminescence of Mn2+-activated MgSrAl10O17 shows a strong green-emission peak around 515 nm due to the T-4(1) -> (6)A(1) transition of Mn2+ ions under the excitation (453 nm). The EPR spectra of Mn2+ ions exhibit a sextet hyperfine structure centered at g approximate to 1.995. The Mn2+ ion occupies Mg sites which are in tetrahedral symmetry. The magnitude of the hyperfine splitting (A) indicates that Mn2+ is in a moderately ionic environment. The number of spins participating in resonance (N), the paramagnetic susceptibility (chi) and the zero-field splitting parameter (D) have been evaluated and discussed. (c) 2008 Elsevier B.V. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Luminescence; EPR; Doping; Phosphor; Manganese; Combustion
Subjects:	Physical Properties Glass
Divisions:	Glass
Depositing User:	Bula Ghosh
Date Deposited:	23 Jan 2012 06:20
Last Modified:	13 Mar 2012 05:31
URI:	http://cgcri.csircentral.net/id/eprint/474

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