DSpace
 

DSpace at IIT Bombay >
IITB Publications >
Article >

Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/12862

Title: Studies of defects inYVO(4): Pb2+, Eu3+ red phosphor material
Authors: NIRWAN, FM
RAO, TKG
GUPTA, PK
PODE, RB
Keywords: combustion process
particle-size
luminescence
vanadates
oxides
garnet
yvo4
Issue Date: 2003
Publisher: WILEY-V C H VERLAG GMBH
Citation: PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 198(2), 447-456
Abstract: Doubly doped YVO4:Ph2+, Eu3+ red phosphor materials with fixed Eu3+ concentration (5 mol%) and varying Pb2+ concentration were prepared via a self-propagating (combustion) synthesis. This consisted of bringing a saturated aqueous solution of the desired metal salts and a suitable organic fuel to the boil, until the mixture ignited and a self-sustaining and rather fast combustion reaction initiated, resulting in dry, amorphous or usually crystalline fine particles of the desired material. The formation of crystalline vanadates was confirmed by X-ray diffraction. A strong emission line at 619 nm due to the (5) D-0 --> F-7(2) transition in the red region was observed. Defects, created by gamma radiation, were studied by means of photoluminescence, thermally stimulated luminescence (TSL) and electron spin resonance. Photoluminescence studies display considerable reduction in emission intensity which appears to arise due to the formation of defect centres after irradiation. The defect centres formed in the present system are tentatively assigned to F+ centres and step annealing measurements suggest a connection between these centres and the TSL glow peak.
URI: http://dx.doi.org/10.1002/pssa.200306632
http://dspace.library.iitb.ac.in/xmlui/handle/10054/12862
http://hdl.handle.net/10054/12862
ISSN: 0031-8965
Appears in Collections:Article

Files in This Item:

There are no files associated with this item.

View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback