Synthesis and luminescence properties of Eu~(2+)-doped 8-coordinated SrO phosphors

摘要

Eu~(2+)-doped SrO (SrO:Eu~(2+)) phosphors were synthesized and their luminescence properties were investigated. Phosphors doped with different Eu~(2+) concentrations were synthesized by the thermal treatment of SrO and Eu powders on a single crystalline MgO substrate at 1500℃ in a reducing atmosphere of Ar and H_2. X-ray diffraction measurements showed that the synthesized phosphors contained 8-coordinated SrO with an orthorhombic crystal system. The phosphors showed a strong blue emission at 456 nm, which was attributed to the Eu~(2+) concentration. In addition, a phosphor doped with 2 at% Eu~(2+) showed an internal quantum efficiency of 30%.