Site engineering strategy toward enhanced luminescence thermostability of a Cr3+-doped broadband NIR phosphor and its application

We demonstrate an strategy for improving the luminescence thermostability by tuning site symmetry in the SrGa₁₂O₁₉–LaMgGa₁₁O₁₉:Cr³⁺ system. End-member SrGa₁₂O₁₉:Cr³⁺ with 45% EQE has potentials in high-power and efficient NIR pc-LED applications.