A white emitting phosphor BaMg2(PO4)2:Ce3+, Mn2+, Tb3+: Luminescence and energy transfer

Abstract A single-phase white emitting phosphor BaMg 2 (PO 4 ) 2 :Ce 3+ , Mn 2+ , Tb 3+ is synthesized by a high temperature solid-state reaction. There has a spectral overlap between emission band of Ce 3+ and excitation bands of Mn 2+ and Tb 3+ , which may support occurrence of energy transfer (ET) from Ce 3+ to Mn 2+ and Tb 3+ . Emitting color of BaMg 2 (PO 4 ) 2 :Ce 3+ , Mn 2+ , Tb 3+ can be adjusted from blue to green via ET of Ce 3+ →Tb 3+ and blue to red via ET of Ce 3+ →Mn 2+ , respectively. A white light emitting diode (white LED) is fabricated by combining a single-phase white emitting phosphor BMP:3%Ce 3+ , 5%Mn 2+ , 3%Tb 3+ with a 365 nm LED chip, and CIE chromaticity coordinates and correlated color temperature (CCT) of the white LEDs are (0.312, 0.313) and 6217 K, respectively. Therefore, as white emitting phosphor, BaMg 2 (PO 4 ) 2 :Ce 3+ /Mn 2+ /Tb 3+ may have potential application in white LEDs.