fig3

From: Chemical unit co-substitution enabling broadband and tunable near-infrared emission in garnet-type Lu₃Sc₂Ga₃O₁₂:Cr³⁺ phosphors

Chemical unit co-substitution enabling broadband and tunable near-infrared emission in garnet-type Lu<sub>3</sub>Sc<sub>2</sub>Ga<sub>3</sub>O<sub>12</sub>:Cr<sup>3+</sup> phosphors

Figure 3. (A) IQE, Abs and EQE values of Lu₃Sc_1.98-_xMg_xGa_3-_xSi_xO₁₂:0.02Cr³⁺ phosphors. (B) Luminescence decay curves of Lu₃Sc_1.98-_xMg_xGa_3-_xSi_xO₁₂:0.02Cr³⁺ phosphors (x = 0.0-0.9) excited by 440 nm light and monitored at their strongest emission wavelength. (C) Temperature-dependent PL spectra and phonon-assisted PL mechanism of LSMGS:Cr excited by 440 nm light at 80 and 300 K. (D) PL/temperature correlation maps of LSMGS:Cr excited by 440 nm light. (E) and (F) Configuration coordinate diagrams of Lu₃Sc_1.98-_xMg_xGa_3-_xSi_xO₁₂:0.02Cr³⁺ (x = 0.0 or 0.6) showing level thermal coupling and temperature-quenching mechanisms.