Synthesis, energy transfer and tunable emission properties of SrSb2O6:Eu3 +, Bi3 + phosphor

• SrSb2O6:Eu3 +, Bi3 + phosphor is synthesized by a solid-state reaction method in air.
• Tunable emission property is observed and analyzed.
• Charge compensation and energy transfer in SrSb2O6:Eu3 +, Bi3 + phosphor are observed.
• The luminous mechanism is analyzed and explained by the simplified energy level diagrams.

Host SrSb2O6, SrSb2O6:Bi3 +, SrSb2O6:Eu3 +, and SrSb2O6:Eu3 +, Bi3 + phosphors are synthesized by solid state reaction method in air. Host SrSb2O6 with excitation 254 nm shows weak green-yellow emission in the range of 320–780 nm due to Sb5 + → O2– transition. SrSb2O6:Bi3 + phosphor with excitation 365 nm emits green light within the range 400–650 nm owing to the 3P1 → 1S0 transition of Bi3 + ion. SrSb2O6:Eu3 + phosphor with excitation 254 nm exhibits a systematically varied hue from green to orange-red light by increasing Eu3 + concentration from 0 to 7 mol%, and that with excitation 394 nm only shows orange-red light. The optimal Eu3 + concentration is ~ 4 mol% in SrSb2O6:Eu3 + phosphor. SrSb2O6:Eu3 +, Bi3 + phosphor with excitation 254 and 394 nm emits orange-red light. Emission intensity of SrSb2O6:Eu3 + phosphor may be enhanced > 2 times by co-doping Bi3 + ion because of the fluxing agent and energy transfer roles of Bi3 + ion in SrSb2O6:Eu3 +, Bi3 + phosphor. The luminous mechanism of SrSb2O6:Eu3 +, Bi3 + phosphor is analyzed and explained by the simplified energy level diagrams of Sb2O62 − group, Bi3 + and Eu3 + ions, and energy transfer processes between them.

PL spectra of SrSb2O6:Eu3 + and SrSb2O6:Eu3 +, Bi3 + phosphors, and energy transfer and charge compensation are formed in SrSb2O6:Eu3 +, Bi3 + phosphor.Figure optionsDownload as PowerPoint slide