Synthesis and luminescent properties of Ce3+ doped LuAG nano-sized powders by mixed solvo-thermal method

Polycrystalline LuAG: Ce 3+ (cerium 3+ -doped lutetium aluminum garnet) powders were prepared by mixed solvo-thermal method. Fourier-transform IR spectroscopy (FTIR) and X-ray diffraction (XRD) measurements showed that the precursors were ethanol derivatives AlO(OH) crystal with hydroxyl and carbonate group. XRD results showed that phase of Lu 2 O 3 disappeared with the precursors were annealed at 400 °C, cubic phase LuAG: Ce 3+ appeared but only one diffraction peaks of LuAP (LuAlO 3 ) at calcination temperature to 700 °C, and the purified crystalline phase of LuAG:Ce 3+ was obtained at 1000 °C. The scanning electron microscopy (SEM) analysis revealed that the synthesized LuAG:Ce 3+ powders were uniform and had good dispersivity with an average particle size about 100 nm. Excitation and emission spectra of Ce 3+ doped LuAG phosphors were measured. Many factors of affecting the intensity of emission spectra were discussed.