Abstract High efficient white light-emitting diodes, near-ultraviolet chips with trichromatic phosphors, have been widely studied in recent years. Herein, we report novel blue-/red-emitting Bi3+/Eu3+ doped Ca3Sc2Si3O12 (CSSO) phosphors with superior thermal stability. Comparing to traditional fluorescent materials Y3Al5O12 (YAG) and Y2O3, photoluminescence (PL) emission intensities of Bi3+ or Eu3+ doped CSSO phosphors maintain 92.4% and 98.6% of initial intensity at 300 K when measured at 423 K. More importantly, it is found that the lattice energy (Ucal) of host can determine thermal quenching behavior of phosphors. By chemical bond theory for complex crystals, the Ucal of CSSO, YAG and Y2O3 are calculated to be 143,060, 58,331 and 12,484 kJ/mol, indicating that CSSO with weak thermal quenching property is due to high Ucal. Subsequently, superior thermal stability of CSSO phosphors is further certified by fingerprints identification and anti-counterfeiting ink at high temperature. This work clearly exhibits a new and convenient strategy to predict the luminescent phosphors with good thermal stability before doing experiments.

中文翻译：

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基于高晶格能的低热猝灭荧光粉在发光应用中的选择

摘要 近年来，高效白光发光二极管、三基色荧光粉近紫外芯片得到了广泛的研究。在此，我们报告了具有优异热稳定性的新型蓝色/红色发光 Bi3+/Eu3+ 掺杂 Ca3Sc2Si3O12 (CSSO) 荧光粉。与传统荧光材料 Y3Al5O12 (YAG) 和 Y2O3 相比，Bi3+ 或 Eu3+ 掺杂的 CSSO 荧光粉的光致发光 (PL) 发射强度在 300 K 时保持初始强度的 92.4% 和 98.6%，在 423 K 下测量。更重要的是，发现主体的晶格能 (Ucal) 可以决定荧光粉的热猝灭行为。由复杂晶体的化学键理论计算得出，CSSO、YAG 和 Y2O3 的 Ucal 分别为 143,060、58,331 和 12,484 kJ/mol，表明 CSSO 具有弱热淬火性能是由于高 Ucal。随后，CSSO荧光粉优越的热稳定性得到指纹识别和高温防伪油墨的进一步验证。这项工作清楚地展示了一种新的、方便的策略，可以在进行实验之前预测具有良好热稳定性的发光磷光体。