A New Type of Zero Thermal Quenching Red Emitting Phosphor Β-Nayf4:Eu3+ for Nuv Leds

Defect-induced zero thermal quenching of a bright red-emitting nonlinear optical material

“…Several explanations for the effect of zero thermal quenching are based on the following points. [58][59][60][61] (1) Defect energy levels commonly exist in crystals where activated electrons can be trapped and released through electron capture centers, and the energy is transferred from thermally activated defect energy levels to activated ions, resulting in compensating for the emission loss caused by the temperature increase or even boosting the emission intensity. ( 2) When the temperature rises, due to thermal perturbation, electrons enter the charge-transfer state (CTS), which is conducive to reducing the non-radiative transition and enhancing the emission intensity of active ions.…”