NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.49 [2011] >
IJPAP Vol.49(12) [December 2011] >

Title: Synthesis and luminescence studies of novel rare earth activated lanthanum pentaborate
Authors: Nagpure, P A
Bajaj, N S
Sonekar, R P
Omanwar, S K
Keywords: Rare earth polyborates
Solution combustion
UVB phosphors
Issue Date: Dec-2011
Publisher: NISCAIR-CSIR, India
Abstract: The lanthanum pentaborate (LaB5O9)is a novel material which exhibits excellent luminescence when doped with rare earth ions. It was prepared by a novel technique which is a slight variation of solution combustion synthesis. The synthesis is based on the exothermic reaction between the fuel (urea) and oxidizer (ammonium nitrate). The structure of the prepared material was confirmed by powder XRD technique. The photoluminescence of rare earth ions (Ce3+, Eu3+) and sensitized luminescence of Gd3+(Pr3+-Gd3+ and Bi3+-Gd3+) in LaB5O9 have been studied. LaB5O9:Ce3+ shows broad band UV emission at 317 nm and LaB5O9:Eu3+ shows orange red emission. LaB5O9: Pr3+-Gd3+ and LaB5O9: Bi3+-Gd3+ exhibit efficient luminescence of Gd3+ in narrow UVB region at 310 nm. The material (La0.5 Pr0.4)B5O9:Gd0.1 exhibits intense narrow band UVB emission at 310 nm and could be a potential candidate for UVB phosphors used in phototherapy lamps.
Page(s): 799-802
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.49(12) [December 2011]

Files in This Item:

File Description SizeFormat
IJPAP 49(12) 799-802.pdf381.37 kBAdobe PDFView/Open
 Current Page Visits: 931 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 162375 since 01-Sep-2015  Last updated on 21-Jun-2016Webmaster: