Luminescent properties of Lu2MoO6:Eu3+ red phosphor for solid state lighting
(1. College of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;
2. Department of Physics, University of Science and Technology of China, Hefei 230026, China)
2. Department of Physics, University of Science and Technology of China, Hefei 230026, China)
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+-O2- group followed by intensive emission in the visible spectral range. The optimal content of Eu3+ is 10% (mole fraction). The critical distance Rc 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