A novel red fluoride phosphor BaNbF₇:Mn⁴⁺ was synthesized via the conventional co-precipitation method. The structure and luminescence properties of BaNbF₇:Mn⁴⁺ were investigated and discussed under various conditions. The BaNbF₇:Mn⁴⁺ phosphor shows strong ZPL emission intensity at about 630 nm under ultraviolet (UV) and blue light excitation. It originated from the highly distorted Mn⁴⁺ octahedral coordination environment in the C_3v group symmetry surrounding. A WLED fabricated with a blend of YAG:Ce³⁺ and the BaNbF₇:Mn⁴⁺ phosphor exhibits a low color temperature (CCT = 3715 K) and a high color rendering index (R_a = 81.2), indicating its potential for application as a red phosphor for WLEDs.

中文翻译：

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用于白光LED的强零声子线红色荧光粉BaNbF7：Mn4 +

通过常规共沉淀法合成了新型的红色氟化物荧光粉BaNbF ₇：Mn ⁴⁺。在各种条件下研究和讨论了BaNbF ₇：Mn ⁴⁺的结构和发光特性。BaNbF ₇：Mn ⁴⁺荧光粉在紫外线（UV）和蓝光激发下在约630 nm处显示出很强的ZPL发射强度。它起源于C _3v组对称周围高度扭曲的Mn ⁴⁺八面体配位环境。由YAG：Ce ³⁺和BaNbF ₇：Mn ⁴⁺的混合物制成的WLED该荧光粉具有较低的色温（CCT = 3715 K）和较高的显色指数（R _a = 81.2），表明其有可能用作WLED的红色荧光粉。