A novel red-emitting Rb₂KGaF₆:Mn⁴⁺ phosphor with octahedral particulate morphology was presented. The XRD Rietveld refinement results indicate that the phosphor crystallized into the cubic phase of Fm m space group with double perovskite structure. The photo-luminescence spectrum exhibits intense red emission lines with zero-phonon line (ZPL) and v ₆ peak locating at 620 and 628 nm respectively. The optical parameters of low color temperature (T _c = 3824 K) and high color rendering index (R _a = 90.2 ) from white LED imply its potential application in solid-state lighting.

中文翻译：

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通信—新型l Rb ₂ KGaF ₆：Mn ⁴⁺固态发光红色荧光粉的发光特性

提出了一种具有八面体颗粒形态的新型红光Rb ₂ KGaF ₆：Mn ⁴⁺荧光粉。XRD Rietveld精炼结果表明，荧光粉结晶为具有双钙钛矿结构的Fm m空间群的立方相。光致发光光谱显示出强烈的红色发射线，零声子线（ZPL）和v ₆峰分别位于620和628 nm。白光LED的低色温（T _c = 3824 K）和高显色指数（R _a = 90.2）的光学参数暗示了其在固态照明中的潜在应用。