Available online at www.sciencedirect.com ScienceDirect Materials Today: Proceedings 4 (2017) 11848–11856 www.materialstoday.com/proceedings 2214-7853 © 2017 Elsevier Ltd. All rights reserved. Selection and Peer-review under responsibility of INTERNATIONAL CONFERENCE ON NANOTECHNOLOGY (ICNANO-2016). ICNANO 2016 Photoluminescence Studies of Rare-Earth-Doped (Ce 3+ ) LaAlO 3 nanopowders prepared by facile combustion route T. Manohar a , S.C. Prashantha a* , H. Nagabhushana b *, K. Channakeshavalu a , H.P. Nagaswarupa a a Research Center, Department of Science, East West Institute of Technology, VTU, Bengaluru-560091, India. b Prof. C.N.R. Rao center for Advanced Materials, Tumkur University, Tumkur-572103, India. Abstract A green emissive with a CIE coordinate (0.179, 0.415), Ce 3+ doped Lanthunum alluminate (LaAlO 3 ) rhombohedral phosphor was prepared by solution combustion synthesis with crystallite size in the range 20-50 nm and characterized by PXRD, TEM, Uv- Visible and photoluminescence. Optical band gap of Ce 3+ doped LaAlO 3 was estimated to be in the range 2.94-4.99 eV. LaAlO 3 :Ce 3+ was effectively excited by NUV and characteristic PL emission confirms that, the phosphor can be a candidate for display applications. © 2017 Elsevier Ltd. All rights reserved. Selection and Peer-review under responsibility of INTERNATIONAL CONFERENCE ON NANOTECHNOLOGY (ICNANO-2016). Key words — LaAlO 3 :Ce 3+ , Photoluminescence (PL), CIE n CCT, WLEDs. 1. Introduction WLEDs play a crucial role in the field of solid-state lighting. They are regarded as the next- generation illumination source due to their efficient luminescence, lifetimes, and environmental friendly nature [1]. At present, rare-earth ions are the most frequently used activators to meet the requirements of WLEDs due to their abundant emission colors based on the energy level transition [2,3]. Among rare-earth ions, Ce 3+ ion has a wide excitation band which can well excited by NUV-LED chips and results in strong emission band due to the transitions from 5d excited state to the 4f ground states(2F7/2 and 2F5/2) [4,5]. The 5d excited state of Ce 3+ is sensitive to the lattice environment and the spectrum site of Ce 3+ might be adjusted from blue to green, yellow, and orange [6-9]. For * Corresponding author. Tel.: +91-98860 21344; fax: +080-232-8824 E-mail address:scphysics@gmail.com. bhushanvlc@gmail.com