Abstract In this work, the luminescence efficiency and thermal stability of NaZr2(PO4)3:Eu2+ phosphors were significantly improved through Na+-Sc3+ ions substitution for Zr4+ ions. The evolutions of crystal structure and luminescent performances induced by Na+-Sc3+ ions substitution were investigated in details for Na1+xZr2-xScx(PO4)3:Eu2+ phosphors. The extra Na+ ions occupied the interstitial sites in NaZr2(PO4)3 lattice accompanied with the replacement of Zr4+ ions by Sc3+ ions, resulting in the increase of crystal structure density of materials. As a result, the displacement (ΔR) between the ground state and excited state of Eu2+ activators in the configuration coordinate diagram was decreased because of the increased crystal structure density induced by Na+-Sc3+ ions substitution, then leading to the significant improvement of luminescence efficiency and thermal stability. The presented study revealed that crystal structure density might be used a useful proxy in screening higher performance phosphors.

中文翻译：

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Na+-Sc3+取代诱导NaZr2(PO4)3:Eu2+荧光粉发光效率和热稳定性显着提高

摘要 本研究通过Na+-Sc3+离子替代Zr4+离子，显着提高了NaZr2(PO4)3:Eu2+荧光粉的发光效率和热稳定性。详细研究了Na1+xZr2-xScx(PO4)3:Eu2+荧光粉由Na+-Sc3+离子取代引起的晶体结构和发光性能的演变。多余的 Na+ 离子占据 NaZr2(PO4)3 晶格的间隙位置，伴随着 Zr4+ 离子被 Sc3+ 离子取代，导致材料晶体结构密度的增加。结果，由于 Na+-Sc3+ 离子取代引起的晶体结构密度增加，配置坐标图中 Eu2+ 激活剂的基态和激发态之间的位移 (ΔR) 减小，然后导致发光效率和热稳定性的显着提高。所呈现的研究表明，晶体结构密度可用作筛选更高性能磷光体的有用指标。