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

Sr 3− x Eu x MoO 6 and Sr 2.7 Eu 0.3 Mo 1− y W y O 6 red phosphors were successfully synthesized by solid-state reaction method at 1260 °C for 6 h. The photoluminescence (PL) properties of Eu 3+ in this phosphor material were investigated by analyzing the excitation and emission spectra and the effect of Eu 3+ concentration. X-ray diffraction (XRD) patterns indicate the formation of Sr 3 MoO 6 :Eu 3+ pure phase. The excitation and emission spectra demonstrate that 30 mol% Eu 3+ :Sr 3 MoO 6 shows a broad charge-transfer (CT) band at around 365 nm and an intense red emission (616 nm, 5 D 0 → 7 F 2 transition), with Commission Internationale de I׳Eclairage (CIE) chromaticity coordinates (0.619, 0.376). The substitution of Mo 6+ with W 6+ 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. [ABSTRACT FROM AUTHOR]