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Auto-ignition based synthesis of Y2O3 for photo- and thermo-luminescent applications

Krishna, Hari R and Nagabhushana, BM and Nagabhushana, H and Chakradhar, RPS and Sivaramakrishna, R and Shivakumara, C and Thomas, Tiju (2014) Auto-ignition based synthesis of Y2O3 for photo- and thermo-luminescent applications. In: JOURNAL OF ALLOYS AND COMPOUNDS, 585 . pp. 129-137.

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Official URL: http://dx.doi.org/10.1016/j.jallcom.2013.09.037

Abstract

We present a simple route for synthesis of Y2O3 for both photoluminescent (PL) and thermoluminescent (TL) applications. We show that by simply switching the fuel from ethylene di-amine tetracetic acid (EDTA) to its disodium derivative (Na-2-EDTA), we obtain a better photoluminescent material. On the other hand, use of EDTA aids in formation of Y2O3 which is a better thermoluminescent material. In both cases pure cubic nano-Y2O3 is obtained. For both the material systems, structural characterization, photoluminescence, thermoluminescence, and absorbance spectra are reported and analyzed. Use of EDTA results in nano Y2O3 with crystallite size similar to 10 nm. Crystallinity improves, and crystallite size is larger (similar to 30 nm) when Na-2-EDTA is used. TL response of Y2O3 nanophosphors prepared by both fuels is examined using UV radiation. Samples prepared with EDTA show well resolved glow curve at 140 degrees C, while samples prepared with Na-2-EDTA shows a glow curve at 155 degrees C. Effect of UV exposure time on TL characteristics is investigated. The TL kinetic parameters are also calculated using glow curve shape method. Results indicate that the TL behavior of both the samples follow a second order kinetic model. (C) 2013 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: copyright for this article belongs to ELSEVIER SCIENCE SA,SWITZERLAND
Keywords: Nanophosphor; Y2O3; Solution combustion; Photoluminescence; Thermoluminescence
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Depositing User: Id for Latest eprints
Date Deposited: 16 Jan 2014 07:30
Last Modified: 16 Jan 2014 07:37
URI: http://eprints.iisc.ac.in/id/eprint/48037

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