Herein, a novel red phosphor based on seven-coordinated Mn⁴⁺ ion-doped tridecafluorodizirconate, Na₅Zr₂F₁₃ (NZF), has been synthesized by stirring a mixture of K₂MnF₆, NaF, and H₂ZrF₆ at room temperature. The crystal structure and morphology of the as-obtained phosphor NZF:Mn have been determined by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The composition and distribution of Mn⁴⁺ ions in NZF have been confirmed by energy-dispersive spectroscopy (EDS) and element mapping via transmission electron microscopy (TEM). The phosphor NZF:Mn exhibits a strong zero phonon line (ZPL) at 616 nm under excitation of blue light from a GaN light-emitting diode (LED) chip; this is attributed to the low symmetry of Mn⁴⁺ ions occupied in a seven-coordinated environment. The luminescence intensity of NZF:Mn has been optimized by controlling the synthesis procedure and synthetic parameters. The luminescence mechanism of the red phosphor NZF:Mn has been investigated according to the detailed experimental results. A warm white light has been produced by a WLED fabricated with the red phosphor NZF:Mn and the commercial yellow phosphor Y₃Al₅O₁₂:Ce³⁺ (YAG:Ce) on a GaN LED chip.

中文翻译：

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七配位Mn ⁴⁺离子掺杂的十三氟二锆酸盐Na ₅ Zr ₂ F ₁₃的新型红色荧光粉，用于温暖的WLED †

在此，通过在室温下搅拌K ₂ MnF ₆，NaF和H ₂ ZrF ₆的混合物，合成了一种新型的基于七配位Mn ⁴⁺离子掺杂的十三氟二锆酸盐Na ₅ Zr ₂ F ₁₃（NZF）的红色荧光粉。室内温度。分别通过X射线衍射（XRD）和扫描电子显微镜（SEM）确定了所获得的荧光体NZF：Mn的晶体结构和形态。Mn的组成和分布⁴⁺在NZF离子已被证实通过能量色散谱（EDS）和元素映射经由透射电子显微镜（TEM）。在来自GaN发光二极管（LED）芯片的蓝光激发下，磷光体NZF：Mn在616 nm处显示出很强的零声子线（ZPL）。这归因于在七配位环境中占据的Mn ⁴⁺离子的低对称性。通过控制合成程序和合成参数，可以优化NZF：Mn的发光强度。根据详细的实验结果，研究了红色荧光粉NZF：Mn的发光机理。通过用红色荧光粉NZF：Mn和商用黄色荧光粉Y ₃ Al ₅ O ₁₂：Ce ³⁺（YAG：Ce）在GaN LED芯片上制造的WLED产生了暖白光。