NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.50 [2012] >
IJPAP Vol.50(02) [February 2012] >


Title: Preparation and characterisation of yttrium based luminescence phosphors
Authors: Sivakumar, V
Lakshmanan, Arunachalam
Kumar, R Satheesh
Kalpana, S
Rani, R Sangeetha
Jose, M T
Keywords: Lamp and Display Phosphors
Y2O3:Eu3+
YxGd1-x)O3:Eu3+
YAG:Eu3+
(YxGd1-x)BO3:Eu3+
Thermal quenching
Luminescence phosphors
Issue Date: Feb-2012
Publisher: NISCAIR-CSIR, India
Abstract: High sensitive Y2O3:Eu3+, Gd2O3:Eu3+, (YxGd1-x)O3:Eu3+, YAG (Y3Al5O12):Eu3+ and (YxGd1-x)BO3:Eu3+ luminescence display phosphors have been made by pyrolysis route followed by sintering at a relatively low temperature of 1000°C. The photoluminescent (PL) efficiencies of all the five phosphors under UV excitation are found to be comparable to that of commercial (YxGd1-x)BO3:Eu3+ (LG make). The PL efficiency as well as 395 nm (4f-4f) to 260 nm (charge transfer) excitation intensity ratio in Y2O3:Eu3+ was found to vary in a complex way with Eu concentration. YAG:Eu3+ could serve as a cheaper substitute to Y2O3:Eu3+ red phosphor used currently in compact fluorescent lamps. While the PL efficiency of Y2O3:Eu3+ remains fairly constant with excitation temperature in the region 25-250°C, the PL efficiency of (YxGd1-x)BO3:Eu3+ gets reduced by more than 30% when the excitation temperature increased from 25 to 250°C.
Page(s): 123-128
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.50(02) [February 2012]

Files in This Item:

File Description SizeFormat
IJPAP 50(2) 123-128.pdf180.82 kBAdobe PDFView/Open
 Current Page Visits: 678 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  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 © 2012 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: 574919 since 06-Feb-2009  Last updated on 26-Aug-2014Webmaster: nopr@niscair.res.in