Patra, Amitava and Baker, G A and Baker, S N (2005) Effects of dopant concentration and annealing temperature on the phosphorescence from Zn2SiO4 : Mn2+ nanocrystals. Journal of Luminescence, 111 (1-2). pp. 105-111. ISSN 0022-2313

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Abstract

The sol-emulsion-gel method is used for the preparation of Mn2+ -doped Zn2SiO4 nanoparticles. The luminescence spectra at 520 nm (T-4(1g) —> (6)A(1g)) and lifetime of the excited state of Mn2+ ions-doped Zn2SiO4 nanocrystals are also found to be sensitive to the annealing temperature (750-1000 degreesC) and concentration (0.25-5 mol%) of ions. We found that at the lowest dopant levels (0.25 mol %, 750 degreesC) the intensity decay kinetic is perfectly described by a single rate. However, with increasing concentration and annealing temperature, the decay was found to be biexponential. The fast component decay is due to the pair or, cluster formation and the slow component decay is due to isolated ions at higher concentration. (C) 2004 Elsevier B.V. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Sol-gel; Nanocrystals; photolumineseence; Time-resolved luminescence
Subjects:	Engineering Materials
Divisions:	Sol Gel
Depositing User:	Bidhan Chaudhuri
Date Deposited:	20 Mar 2012 06:53
Last Modified:	20 Mar 2012 06:53
URI:	http://cgcri.csircentral.net/id/eprint/1270

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