Preparation and luminescence of a novel red phosphor BaY4Si3O13:Eu3+ and effect of Li2CO3 doping

A novel red phosphor BaY 4 Si 3 O 13 :Eu 3+ (BYSO:Eu 3+ ) was designed and prepared through a high-temperature solid-phase method in this work. It was found that the addition of Li 2 CO 3 in the synthesis process could significantly decrease the sintering temperature and increase the intensity and purity of red emission, as more lower symmetry sites were occupied by Eu 3+ . The optimum preparation conditions of BYSO:Eu 3+ were obtained as sintering at 1350 °C for 3h with the doping of 18% Eu 3+ and 5% Li 2 CO 3 . The CIE chromaticity coordinate was (0.636,0.362) and color purity reached 91.56% at room temperature, and 53.93% of the initial PL intensity could be retained when the temperature rose up to 453 K. The results showed that BYSO:Eu 3+ had greatly potential application in white LED deriving from the great red emission.