Sensitized luminescence and energy transfer in Ce3+ and Eu2+ codoped calcium magnesium chlorosilicate

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

69 Scopus Citations
View graph of relations

Author(s)

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)397-401
Journal / PublicationOptical Materials
Volume18
Issue number4
Publication statusPublished - Jan 2002

Abstract

Ce3+ and Eu2+ ions codoped calcium magnesium chlorosilicate [Ca8Mg(SiO4)4Cl2] phosphors have been synthesized and characterized. Intense bluish-green light was observed under ultraviolet and blue light excitations. The diffuse reflection, excitation and emission spectra of Ca8Mg(SiO4)4Cl2: Ce3+,Eu2+ were measured at room temperature, and enhancement of Eu2+ emission was confirmed. The fluorescence lifetimes of Ce3+ were measured, and the mechanism of nonradiative energy transfer from Ce3+ to Eu2+ is found to be electric dipole-dipole interaction. The probabilities and efficiencies of nonradiative energy transfer were also calculated, and the results indicate that the efficiency can be as high as 86% in this material system. © 2002 Published by Elsevier Science B.V.

Research Area(s)

  • Calcium magnesium chlorosilicate, Ce3+, Energy transfer, Eu2+, Sensitized luminescence