Title: Synthesis and photoluminescence properties of nanocrystalline terbium aluminium garnet phosphor

Authors: Humyra Shabir, Bansi Lal, Mohammad Rafat

Addresses: Center for Laser Technology, Indian Institute of Technology, Kanpur-208016, India. ' Center for Laser Technology, Indian Institute of Technology, Kanpur-208016, India. ' Department of Applied Sciences and Humanities, Faculty of Engineering and Technology, Jamia Millia Islamia, New Delhi-110025, India

Abstract: Nanocrystalline terbium aluminium garnet phosphor has been prepared by the calcinations (800-1600°C) of the precursor obtained by sol-gel technique. The particle size measurements and SEM analysis of the as prepared powder show the grain size variation in 50-600 nm range. XRD and FTIR measurements show the development of better crystalline phase with increase in the sintering temperature. Photo-luminescence spectra at room temperature consist of well separated six groups around 440 nm, 490 nm, 549.9 nm, 586.9 nm, 624 nm and 691 nm. The emission intensity of the group around 691 nm increases with the increase in calcination temperature from 1000°C-1400°C, while in case of all other groups the intensity decreases in this range of temperature.

Keywords: terbium aluminium garnet; photoluminescence; sol-gel; nanocrystalline TAG; phosphor; calcination; nanotechnology.

DOI: 10.1504/IJNBM.2009.027738

International Journal of Nano and Biomaterials, 2009 Vol.2 No.1/2/3/4/5, pp.416 - 424

Published online: 08 Aug 2009 *

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