Thermal quenching (TQ) seriously restricts the practical application of phosphor-converted light emitting diodes (LEDs), especially for high-power operation. More recently, considerable effort has been devoted to minimizing the emission loss with increasing temperature via the formation of defect levels; however, the specific compensation mechanism of carriers is poorly understood. Here, the commercial silicate phosphor Sr₃SiO₅:Eu²⁺ exhibiting zero-TQ is delicately developed by reconstructing the defect structure with the introduction of Tm³⁺ ions. The induced available deep traps are employed to trap carriers effectively, which inhibits energy loss in the form of phonons as a non-radiative process. Subsequently, the carriers released by thermal disturbance transfer energy to the activators of Eu²⁺, compensating the luminous intensity loss significantly. The explored Sr₃SiO₅:Eu²⁺,Tm³⁺ phosphor exhibits long-term stability without suffering from a luminous intensity decrease or color deviation, which is ascribed to the dynamic equilibrium between capturing and releasing carriers with the assistance of thermal energy. Furthermore, the phosphor-converted white LEDs (pc-wLEDs) produced with the as-prepared phosphor maintain the zero-TQ properties with excellent stability of the luminous intensity and color even up to 120 °C.

中文翻译：

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借助深阱中的载流子，实现长期的零热淬火†

热淬灭（TQ）严重限制了磷光转换发光二极管（LED）的实际应用，特别是在大功率操作中。最近，人们致力于通过形成缺陷能级来使随温度升高的排放损失最小化。但是，对载波的具体补偿机制知之甚少。在此，通过引入Tm ³⁺来重建缺陷结构，可以精细地开发出具有零TQ值的商品硅酸盐磷光体Sr ₃ SiO ₅：Eu ^2+。离子。感应的可用深阱被用来有效地捕获载流子，作为非辐射过程，它以声子的形式抑制能量损失。随后，由于热干扰而释放的载流子将能量转移到Eu ²⁺的活化剂上，从而显着补偿了发光强度的损失。探索的Sr ₃ SiO ₅：Eu 2 ⁺，Tm ³⁺磷光体具有长期稳定性，而不会受到发光强度降低或颜色偏差的影响，这归因于借助热能在捕获和释放载流子之间的动态平衡。此外，用所制备的磷光体制成的磷光体转换白光LED（pc-wLED）保持零TQ特性，即使在高达120°C的温度下，其发光强度和颜色也具有出色的稳定性。