Bi3+ ? Mn2+ energy transfer and tunable luminescence in Ba9La2Si6O24: Bi3+/Mn2+ phosphors

A few of Bi3+/Mn2+ doped Ba9La2Si6O24 phosphors were synthesized in air by the solid state reactions at 1400 degrees C for the purpose of investigating their possible uses in the light-emitting diodes. The phase and luminescence performance were surveyed using the X-ray diffractometer and spectrometer, respectively. The results demonstrate the single phase and absorbance to the ultraviolet light of the synthesized phosphors. There is the Bi3+ -> Mn2+ energy transfer, which gives rise to the tunable luminescence of the Bi3+/Mn2+ codoped Ba9La2Si6O24 phosphors. Upon the ultraviolet light excitation, the white light is generated by the Ba9La2Si6O24:0.03Bi(3+)/0.02Mn(2+) and Ba9La2Si6O24:0.03Bi(3+)/0.03Mn(2+) phosphors.