title: Luminescence and site occupancies of Eu3+ in La2CaB10O19.
abstract: Eu(3+)-activated La2CaB10O19 phosphors with nominal chemical formulae La(2-x)Eu(x)CaB10O19 and La2Ca(1-2x)Eu(x)Na(x)B10O19 were prepared. The luminescence properties under VUV-UV excitation were investigated. Luminescence spectra reveal Eu(3+) ions occupy both Ca(2+) and La(3+) sites in all samples. The O(2-)→ Eu(3+) charge transfer bands (CTBs) and the (5)D0→(7)F0 emissions of Eu(3+) at Ca (2+) site and La(3+) site are identified, respectively. The schematic energy levels for Eu(3+) in two sites were achieved. Luminescence decays of the (5)D0→(7)F0 transitions were measured for both sites.
authors.affiliation: MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China. cesbin@mail.sysu.edu.cn.
authors.forename: Huihong
authors.initials: H
authors.lastname: Lin
authors.forename: Dejian
authors.initials: D
authors.lastname: Hou
authors.forename: Lan
authors.initials: L
authors.lastname: Li
authors.forename: Ye
authors.initials: Y
authors.lastname: Tao
authors.forename: Hongbin
authors.initials: H
authors.lastname: Liang