Journal of Applied Science and Engineering

Published by Tamkang University Press


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Anthuvan John Peter This email address is being protected from spambots. You need JavaScript enabled to view it.1 and I. B. Shameem Banu2

1Department of Physics, St. Anne’s College of Engineering and Technology, Panruti, Tamilnadu, India
2Department of Physics, B. S. Abdur Rahman University, Vandalur, Chennai, Tamilnadu, India


Received: May 23, 2016
Accepted: July 5, 2016
Publication Date: December 1, 2016

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A highly efficient green emitting phosphor, Tb3+-activated Li3Ba2Gd3-x(MoO4)8, was synthesized by mechanochemically assisted solid state metathesis reaction route at room temperature and its luminescence properties have been investigated. Under excitation of UV light, these Li3Ba2Gd3-x(MoO4)8: xTb3+ phosphors showed a strong emission band centered at 546 nm (green) which corresponds to 5D4→7F5 transition of Tb3+. Analysis of the emission spectra with different Tb3+ concentrations revealed that the optimum dopant concentration for Li3Ba2Gd3-x(MoO4)8: xTb 3+ phosphors are about 8 mol% of Tb3+ The green emission intensity of the as prepared Li3Ba2Gd3-x (MoO4)8: 0.08 Tb3+ phosphors are 1.4 times greater than that of the commercial LaPO4: Ce, Tb green phosphor. All properties show that Li3Ba2Gd3-x(MoO4)8: xTb3+ is a very appropriate greenemitting phosphor for fluorescent lamp applications.

Keywords: Phosphors, Solid State Meta Thesis Reaction, Lamp Applications, UV Light


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