Abstract
A series of novel color-tunable phosphors of Ce3+, Tb3+-codoped Li6Gd(BO3)3 was synthesized through a classic solid-state reaction. The color of these phosphors changes from blue to green by adjusting the ratio of Ce3+ to Tb3+. The photoluminescence properties of the synthesized phosphors were investigated, and several major emission bands that belong to Ce3+ and Tb3+ ions were irradiated with near ultraviolet light. Moreover, the energy transfer mechanism between Ce3+ and Tb3+ in Li6Gd(BO3)3 was explored. The photoluminescence decay curves were performed to validate the energy transfer. The analysis demonstrated that the energy transfer from Ce3+ to Tb3+ arose from dipole–dipole interaction with a critical distance of approximately 17.6Å.
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