Synthesis, structural and thermoluminescence properties of YAlO3:Dy3+ nanophosphors

Premkumar, HB and Sunitha, DV and Nagabhushana, H. and Sharma, SC and Prasad, Daruka B and Nagabhushana, BM and Shivakumara, C and Rao, JL and Gopal, NO and Prabhakara, KR and Ke, Shyue-Chu and Chakradhar, RPS (2014) Synthesis, structural and thermoluminescence properties of YAlO3:Dy3+ nanophosphors. In: JOURNAL OF ALLOYS AND COMPOUNDS, 591 . pp. 337-345.

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Abstract

Thermoluminescence properties of YAlO3:Dy3+ nanophosphor prepared by a low temperature solution combustion (SC) method using oxalyl dihydrazide as a fuel were studied and the results were compared to bulk phosphor prepared by solid state (SS) synthesis. Powder X-ray diffraction patterns confirm the orthorhombic phase of SC and SS methods. Rietveld refinement was used to estimate the cell parameters of undoped and Dy3+ doped YAlO3. Scanning electron micrographs reveal dumbbell shape particles. Electron paramagnetic resonance spectra of YAlO3:Dy3+ nanophosphors were studied at 293 K, 77 K and 10 K. Thermoluminescence responses of SC and SS prepared phosphor were studied using gamma irradiation in the dose range 0.1-6 kGy at a warming rate of 1 degrees C s (1) at room temperature (RT). The optimized concentrations of Dy3+ ions in YAlO3 was found to be 3 mol%. The trapping parameters (i. e. activation energy, frequency factor, order of kinetic) of all the individual peaks of the glow curves have been analysed by using Chen's method. The low fading and linear response in the wide range (0.1-1 kGy) suggests the possibility of usage of SC prepared phosphor in dosimeter applications. (C) 2013 Elsevier B. V. All rights reserved.

Item Type:	Journal Article
Publication:	JOURNAL OF ALLOYS AND COMPOUNDS
Publisher:	ELSEVIER SCIENCE SA
Additional Information:	copyright for this article belongs to ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Keywords:	Oxides; Chemical synthesis; X-ray diffraction; Luminescence; Electron paramagnetic resonance (EPR)
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	25 Mar 2014 09:41
Last Modified:	25 Mar 2014 09:42
URI:	http://eprints.iisc.ac.in/id/eprint/48706

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