Thermometric properties of Na ₂Y ₂TeB ₂O ₁₀:Tb ³⁺ green phosphor based on fluorescence/excitation intensity ratio

For noncontact optical thermometry, in contrast with fluorescence intensity ratio (FIR) technology, excitation (EIR) technology has been seriously limited due to low sensitivity. Moreover, by exploring all possible temperature-dependent response, developing multimode thermometry is of great importance. In this work, a new Na2Y2TeB2O10 (NYTB):Tb3+ phosphor obtained solid-state reaction. Based on FIR and EIR models Tb3+, thermometric properties are studied thoroughly. Excellent relative absolute sensitivity (SR SA) acquired the significant difference emission/excitation lines response temperature. Meanwhile, Tb3+ content-dependent luminescence quenching mechanism discussed. This study shows feasible route for exploiting well-performing FIR-/EIR-based materials.