Tunable luminescence and energy transfer for Ce3+/Tb3+/Sm3+ doped SrAl2Si2O8 phosphors

Abstract A series of Ce 3+ /Tb 3+ /Sm 3+ doped SrAl 2 Si 2 O 8 phosphors were synthesized by a solid state reaction. The phase and luminescence of the synthesized phosphors were investigated. The XRD patterns of the synthesized phosphors indicate that the doped rare earth ions do not change the phase structure of SrAl 2 Si 2 O 8 host. For Ce 3+ , Tb 3+ and Sm 3+ singly doped SrAl 2 Si 2 O 8 phosphors, emission bands locating at blue, green and red regions were observed, which are characteristic emission bands of Ce 3+ , Tb 3+ and Sm 3+ . For Ce 3+ /Tb 3+ and Ce 3+ /Sm 3+ codoped SrAl 2 Si 2 O 8 phosphors, energy transfer occurred between Ce 3+ /Tb 3+ ion pairs but it was forbidden between Ce 3+ /Sm 3+ ion pairs. And for Ce 3+ /Tb 3+ /Sm 3+ triply doped SrAl 2 Si 2 O 8 phosphors, energy transfer from Ce 3+ to Sm 3+ through Tb 3+ chain was accomplished.