title: Luminescence and X-ray absorption studies on 0.5% Ce(3+) doped BaCa2MgSi2O8 phosphor.
abstract: 0.5% Ce(3+) doped BaCa2MgSi2O8 phosphor was prepared by a conventional solid state reaction method. Luminescence spectra as well as fluorescence decay were monitored in the VUV-UV range. Ce(3+) emissions are assigned to cerium ions on a Ba(2+) site, and the five 4f-5d excitation bands of Ce(3+) were determined at low temperature. The light yield is estimated to be around 10,600 ph MeV(-1) under X-ray excitation. X-ray absorption near-edge structure (XANES) was explored to study the energy transfer efficiency to optical centers from each element in the phosphor; the results show that the contributions to luminescence are not identical for each element.
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China. cesbin@mail.sysu.edu.cn.
authors.forename: Dejian
authors.initials: D
authors.lastname: Hou
authors.forename: Weijie
authors.initials: W
authors.lastname: Zhou
authors.forename: Cen
authors.initials: C
authors.lastname: Wu
authors.forename: Pieter
authors.initials: P
authors.lastname: Dorenbos
authors.forename: Hongbin
authors.initials: H
authors.lastname: Liang
authors.forename: Tsun-Kong
authors.initials: TK
authors.lastname: Sham
authors.forename: Bingbing
authors.initials: B
authors.lastname: Zhang
authors.forename: Yan
authors.initials: Y
authors.lastname: Huang
authors.forename: Ye
authors.initials: Y
authors.lastname: Tao