Fluorescence emission spectrum and energy transfer in Eu and Mn co-doped Ba2Ca(BO3)2 phosphors

Eu2+ and Mn2+ co-doped Ba2Ca(BO3)2 phosphors yield two emission bands consisting of green and red components under the excitation of 360 nm, which shows a great potential for white LEDs. Effective energy transfer occurs in Eu2+/Mn2+ co-doped Ba2Ca(BO3)2 host due to the large spectral overlap between the emission of Eu2+ and the excitation of Mn2+. The energy transfer from Eu2+ to Mn2+ is thoroughly investigated by their excitation, emission and photoluminescence decay behaviors, and is demonstrated to be via the dipole-quadrupole interaction.