Facile synthesis and enhancement of luminescence properties of red-emitting Sr₂Si₅N₈: Eu²⁺ phosphor

A facile synthetic technique for producing high-quality red-emitting Sr₂Si₅N₈: Eu²⁺ phosphor was successfully prepared at 1600 °C for 5 hours under an unpressurized 5%H2/95%N2 atmosphere. The prepared Sr₂Si₅N₈: Eu²⁺ phosphor showed broadband emission spectra as well as higher emission intensity than the conventional Sr₂Si₅N₈: Eu²⁺ phosphor. The phosphor-converted LED with Sr₂Si₅N₈: Eu²⁺ by facile synthetic route showed an increase of quantum efficiency of 10% with a high color rendering index value (>90). Therefore, we expect this synthetic technique to be a candidate for enhancing the photoluminescence properties of nitride phosphor.