Site-sensitive energy transfer from Ce3+ to Tb3+/Mn2+ based on an efficient phosphor Li4SrCa(SiO4)2:Ce3+

Abstract Ce 3+ ,Tb 3+ /Mn 2+ co-doped Li 4 SrCa(SiO 4 ) 2 (LSCSO) phosphors were synthesized by a high-temperature solid-state reaction based on a highly efficient LSCSO:0.03Ce 3+ with UV and blue emissions. Energy transfer (ET) in these phosphors was studied. Analyses indicate that ET efficiency from UV Ce 3+ to Tb 3+ and Mn 2+ are larger than that from Ce 3+ with blue emission. Different situations in spectral overlap and diverse interactions lead to the different ET efficiency. Emission color of LSCSO:Ce 3+ ,Tb 3+ ,Mn 2+ phosphor can be tuned in green-orange-white region by adjusting the concentrations of activators. The present work may provide an example to explore suitable Ce 3+ or Eu 2+ doped phosphor for single-phase white phosphor on the basis of efficient energy transfer.