Abstract:The Eu³⁺ activated Lu₂MoO₆ phosphors were synthesized by high-temperature solid-state reaction method. The X-ray diffraction (XRD), excitation spectra, emission spectra and decay lifetime of the phosphors were measured to characterize the structure and luminescent properties. The XRD results show that all the prepared phosphors can be assigned to the monoclinic structure. The experimental results indicate efficient absorption of near ultraviolet light from the Mo⁶⁺-O^2- group followed by intensive emission in the visible spectral range. The optimal content of Eu³⁺ is 10% (mole fraction). The critical distance R_c and energy transfer mechanism were also discussed in detail. This red emitting material may be applied as a promising red phosphor for the near ultraviolet excited white light emitting diodes.

Key words: Lu₂MoO₆:Eu³⁺; luminescent properties; red phosphor