Dhananjaya, N. and Nagabhushana, H. and Nagabhushana, B. M. and Rudraswamy, B. and Shivakumara, C. and Chakradhar, R P S (2011) Effect of Li(+)-ion on enhancement of photoluminescence in Gd(2)O(3):Eu(3+) nanophosphors prepared by combustion technique. Journal of Alloys and Compounds, 509 (5). pp. 2368-2374. ISSN 0925-8388

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Abstract

Gd(2)O(3):Eu(3+) (4 mol%) nanophosphor co-doped with Li(+) ions have been synthesized by low-temperature solution combustion technique in a short time. Powder X-ray diffractometer (PXRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), UV-VIS and photoluminescence (PL) techniques have been employed to characterize the synthesized nanoparticles. It is found that the lattice of Gd(2)O(3):Eu(3+) phosphor transforms from monoclinic to cubic as the Li(+)-ions are doped. Upon 254 nm excitation, the phosphor showed characteristic luminescence (5)D(0) -> (7)F(J) (J= 0-4) of the Eu(3+) ions. The electronic transition located at 626 nm ((5)D(0) -> (7)F(2)) of Eu(3+) ions was stronger than the magnetic dipole transition located at 595 nm ((5)D(0) -> (7)F(1)). Furthermore, the effects of the Li(+) co-doping as well as calcinations temperature on the PL properties have been studied. The results show that incorporation of Li(+) ions in Gd(2)O(3):Eu(3+) lattice could induce a remarkable improvement of their PL intensity. The emission intensity was observed to be enhanced four times than that of with out Li(+)-doped Gd(2)O(3):Eu(3+).

Item Type:	Article
Uncontrolled Keywords:	Nanophosphor; Eu(3+); Gadolinium oxide; Li(+) co-doping; XRD; SEM; UV-VIS; Photoluminescence
Subjects:	Physical Properties
Divisions:	Glass
Depositing User:	Bidhan Chaudhuri
Date Deposited:	16 Jan 2012 12:10
Last Modified:	02 Mar 2012 10:57
URI:	http://cgcri.csircentral.net/id/eprint/210

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