Synthesis and optical properties of novel red phosphors Sr3MoO6:Eu3+ with highly enhanced emission by W6+ doping

Sr3−xEuxMoO6 and Sr2.7Eu0.3Mo1−yWyO6 red phosphors were successfully synthesized by solid-state reaction method at 1260 °C for 6 h. The photoluminescence (PL) properties of Eu3+ in this phosphor material were investigated by analyzing the excitation and emission spectra and the effect of Eu3+ concentration. X-ray diffraction (XRD) patterns indicate the formation of Sr3MoO6:Eu3+ pure phase. The excitation and emission spectra demonstrate that 30 mol% Eu3+:Sr3MoO6 shows a broad charge-transfer (CT) band at around 365 nm and an intense red emission (616 nm, 5D0→7F2 transition), with Commission Internationale de I׳Eclairage (CIE) chromaticity coordinates (0.619, 0.376). The substitution of Mo6+ with W6+ results in a considerable enhancement of luminescence intensity and improved red color purity. All the results imply that the studied phosphors may be a promising red component for the application in the white light emitting diodes.