Bi0.5Na0.5TiO3:Eu3+: An intense blue converting red phosphor

An efficient red-emitting phosphor, Bi0.5Na0.5TiO3:Eu3+, was synthesized by the solid-state reaction. The Bi0.5Na0.5TiO3:Eu3+ phosphor showed a strong red emission corresponding to the 5D0→7F2 (618 nm) transition of Eu3+ under blue excitation (464 nm). The emission intensity reached its maximum when Eu3+-doped concentration is 0.25 mol. Furthermore, Bi0.5Na0.5TiO3:0.25Eu3+ revealed high quantum yield (η=0.50) and smaller full width at half-maximum (FWHM) values (5 nm). These results show that Bi0.5Na0.5TiO3:Eu3+ material is a promising red phosphor for application in W-LEDs with blue LEDs chip.