Luminescence and energy transfer in Eu2+, Mn2+ co-doped Li4SrCa(SiO4)2 for white light-emitting-diodes

Li4(Sr0.96Eu0.04)(Ca1 − xMnx)(SiO4)2 phosphors were synthesized by solid-state reactions and photoluminescence (PL) properties were investigated. These phosphors have intense absorption in n-UV region, which is suitable for excitation of UV LEDs. The orange-reddish emission of Mn2+ can be adjusted by changing the Mn2+/Eu2+Mn2+/Eu2+ ratio. Energy transfer from Eu2+ to Mn2+ is observed. Li4(Sr0.96Eu0.04)(Ca1 − xMnx)(SiO4)2 phosphors could be used in white LEDs.