Red-tunable LuAG garnet phosphors via Eu3+→Mn4+ energy transfer for optical thermometry sensor application

The Eu³⁺→Mn⁴⁺ energy transfer strategy is designed in the Lu₃Al₅O₁₂ garnet structure to achieve color-adjustable narrow emission from orangish-red to deep-red light and remarkable thermal quenching improvement for optical thermometry sensors.