Table of Contents
Indian Journal of Materials Science
Volume 2014, Article ID 794680, 4 pages
Research Article

A Promising Orange-Red Nanocrystalline Potassium Lanthanum Orthophosphate for White Light-Emitting Diodes

1School of Physics, Shri Mata Vaishno Devi University, Katra 182320, India
2Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa

Received 23 November 2013; Accepted 15 January 2014; Published 19 February 2014

Academic Editors: Swapankumar Ghosh, Fabrice Gourbilleau, and Manijeh Razeghi

Copyright © 2014 Palvi Gupta et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The spectral properties of the K3La(PO4)2:Eu3+ nanophosphors synthesized by the combustion method are reported. The phosphors were characterized by X-ray diffraction, transmission electron microscopy, and optical spectroscopy. The XRD pattern reveals a pure monoclinic phase of the K3La(PO4)2 with the average particle size of 30 nm in diameter. Under UV excitation, the phosphors exhibited several emission bands which were assigned to 4f-4f transitions of Eu3+ ions. The red shade of the Eu3+ ion with the CIE coordinates (x, y) as (0.63, 0.37) suggests that this material is a promising phosphor for near-UV InGaN-based LED lighting.