title: Synthesis, energy transfer and tunable emission properties of SrSb2O6:Eu(3+), Bi(3+) phosphor.
abstract: Host SrSb2O6, SrSb2O6:Bi(3+), SrSb2O6:Eu(3+), and SrSb2O6:Eu(3+), Bi(3+) phosphors are synthesized by solid state reaction method in air. Host SrSb2O6 with excitation 254nm shows weak green-yellow emission in the range of 320-780nm due to Sb(5+)→O(2-) transition. SrSb2O6:Bi(3+) phosphor with excitation 365nm emits green light within the range 400-650nm owing to the (3)P1→(1)S0 transition of Bi(3+) ion. SrSb2O6:Eu(3+) phosphor with excitation 254nm exhibits a systematically varied hue from green to orange-red light by increasing Eu(3+) concentration from 0 to 7mol%, and that with excitation 394nm only shows orange-red light. The optimal Eu(3+) concentration is ~4mol% in SrSb2O6:Eu(3+) phosphor. SrSb2O6:Eu(3+), Bi(3+) phosphor with excitation 254 and 394nm emits orange-red light. Emission intensity of SrSb2O6:Eu(3+) phosphor may be enhanced >2 times by co-doping Bi(3+) ion because of the fluxing agent and energy transfer roles of Bi(3+) ion in SrSb2O6:Eu(3+), Bi(3+) phosphor. The luminous mechanism of SrSb2O6:Eu(3+), Bi(3+) phosphor is analyzed and explained by the simplified energy level diagrams of Sb2O6(2-) group, Bi(3+) and Eu(3+) ions, and energy transfer processes between them.
authors.affiliation: College of Mathematics and Physics, Jinggangshan University, Ji'an 343009, China. Electronic address: jxcrp@163.com.
authors.forename: Renping
authors.initials: R
authors.lastname: Cao
authors.affiliation: College of Mathematics and Physics, Jinggangshan University, Ji'an 343009, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Fu
authors.affiliation: College of Mathematics and Physics, Jinggangshan University, Ji'an 343009, China.
authors.forename: Dedong
authors.initials: D
authors.lastname: Peng
authors.affiliation: School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China.
authors.forename: Chunyan
authors.initials: C
authors.lastname: Cao
authors.affiliation: College of Mathematics and Physics, Jinggangshan University, Ji'an 343009, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Ruan
authors.affiliation: College of Mathematics and Physics, Jinggangshan University, Ji'an 343009, China.
authors.forename: Xiaoguang
authors.initials: X
authors.lastname: Yu
keywords: Energy transfer; Optical properties; Phosphor; Tunable emission