Abstract
Novel green-emitting phosphors of Ca3Y2(Si3O9)2:Ce3+,Tb3+ was successfully synthesized by solid-state reaction. Not merely the luminescence properties and energy transfer of Ca3Y2(Si3O9)2:Ce3+,Tb3+, the calculation of the energy transfer critical distance between Ce3+ and Tb3+ ions are also investigated in this work. By codoping Ce3+ into Ca3Y2(Si3O9)2:Tb3+, the emission intensity is dramatically enhanced by 5.8 times and the emission intensity is 126% as compared to that of ZnS:Cu,Al. We has been demonstrated that the energy transfer from Ce3+ to Tb3+ is a resonant type via dipole-dipole mechanism with the energy transfer critical distance of 6.78 Aå. The preliminary data demonstrate that the novel phosphor can emit blue to yellow-greenish under UV excitation and it exhibit the potential to act as UV convertible phosphor.
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