title: Crystal structure and luminescent properties of a novel high efficiency blue-orange emitting NaCa2LuSi2O7F2:Ce3+,Mn2+ phosphor for ultraviolet light-emitting diodes.
abstract: A series of NaCa2LuSi2O7F2:xCe(3+),yMn(2+) phosphors are firstly prepared by a high-temperature solid-state reaction technique. The Rietveld refinement analysis confirmed that the obtained phosphors have a pure crystalline phase with cuspidine-group structure. NaCa2LuSi2O7F2:xCe(3+),yMn(2+) phosphors can be efficiently excited by UV light and have two emission bands at about 410 and 600 nm. The luminescent properties of the singly-doped samples reveal that the Ce(3+) ions occupy two different Lu(3+) sites in the host lattice. We observed an efficient energy transfer from the Ce(3+) to Mn(2+) ions. The investigation revealed that the mechanism of the energy transfer was a resonant type via a nonradiative dipole-quadrupole interaction. The hues can be adjusted and white light can be obtained by tuning the concentration of Mn(2+) ions in the codoped phosphors through the energy transfer from the Ce(3+) to Mn(2+) ions, hinting a promising application of NaCa2LuSi2O7F2:xCe(3+),yMn(2+) as a single-component phosphor that can produce white light from UV-based LEDs.
authors.affiliation: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China. hpyou@ciac.jl.cn.
authors.forename: Wenzhen
authors.initials: W
authors.lastname: Lv
authors.forename: Wei
authors.initials: W
authors.lastname: Lü
authors.forename: Ning
authors.initials: N
authors.lastname: Guo
authors.forename: Yongchao
authors.initials: Y
authors.lastname: Jia
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhao
authors.forename: Mengmeng
authors.initials: M
authors.lastname: Jiao
authors.forename: Baiqi
authors.initials: B
authors.lastname: Shao
authors.forename: Hongpeng
authors.initials: H
authors.lastname: You