Synthesis and photoluminescence characteristics of the LiGd3(MoO4)5: Eu3+ red phosphor with high color purity and brightness

Red phosphors LiGd3(MoO4)(5) doped with various Eu3+ concentrations were synthesized by the solid state reaction method. Diffuse reflection spectra, photoluminescence spectra, and temperature-dependent luminescence spectra of the phosphors were measured. Due to the weak concentration quenching effect, the optimal Eu3+ concentration is up to 90 at.% in the LiGd3(MoO4) 5: Eu3+, which shows higher color purity and brightness than the commercial Y2O2S: 6.3at.% Eu3+ red phosphor excited at 395 nm. When the temperature was increased to 450 K, the red emission intensity of the phosphor decreased to 58% of that at 300 K. The results show that the LiGd3(MoO4) 5: 90at.% Eu3+ may be a promising red phosphor for white light-emitting diodes. (c) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement