Effect of strontium nitride on the properties of Sr₂Si₅N₈:Eu²⁺ red phosphor

The nitride phosphor Sr₂Si₅N₈:Eu²⁺ was synthesized by the high temperature solid-state method. The properties of Sr₂Si₅N₈:Eu²⁺ were discussed by X-ray diffraction (XRD) scanning electron microscope (SEM) and spectra analysis. The XRD pattern shows that the single phase produces when strontium nitride is a bit excessive. The SEM photo implies that the excessive strontium nitride works as a flux in the reaction system. The position of emission peak is also located at about 612 nm as strontium nitride is excessive. The luminescent intensity of the phosphor adding excessive strontium nitride is higher than that of the phosphor introducing stoichiometric strontium nitride. The optimized content of nitride strontium was 2.05 mol/mol for the obtained phosphor with excellent properties.