Enhanced crystallinity and thermal stability of Ba2+ and Al3+–O2− co-substituted Sr2Si5N8:Eu2+

Abstract

By co-substituting a cation (M²⁺:Ba²⁺ or Ca²⁺) and Al³⁺–O²⁻ into Sr₂Si₅N₈:Eu²⁺ in a solid-state method, we successfully synthesized the nitrido-alumino-silicate phosphors Sr_(2−y)M_ySi_5−xAl_xN_8−xO_x:Eu²⁺ (Ba-AlO-258 (M_y = Ba_0.3, x > 0) and Ca-AlO-258 (M_y = Ca_0.3, x > 0)).