ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Anomalous fluorescence features of $Eu^{2+}$ in apatite-pyromorphite type matrices

Jagannathan, R and Kutty, TRN (1997) Anomalous fluorescence features of $Eu^{2+}$ in apatite-pyromorphite type matrices. In: Journal of Luminescence, 71 (2). pp. 115-121.

[img] PDF
Anomalous.pdf - Published Version
Restricted to Registered users only

Download (522Kb) | Request a copy
Official URL: http://www.sciencedirect.com/science?_ob=MImg&_ima...

Abstract

Divalent europium doped chloro-apatites, the well-known blue phosphor in high efficiency fluorescent lamps, exhibit anomalous fluorescence properties ascribed to photoionization process and the allied process. The photoionization properties of Eu2+-luminescent centre(s) in this system of materials has profound dependence on the chemical constituents of the matrix as exemplified by the diadochic substitution of (SiO4)(4-) for [(PO4)(3-) + Cl-]. The anomalous impurity trapped exciton emission can be better observed in Ba-compound than in the Ca- and Sr analogues, possibly due to the effect of the position of the conduction band.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Apatite;pyromorphite;phosphors;europium;photoluminescence.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 06 Mar 2009 10:32
Last Modified: 19 Sep 2010 05:01
URI: http://eprints.iisc.ernet.in/id/eprint/18338

Actions (login required)

View Item View Item