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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >The use of a single ammonium acidic salt towards simple green co-precipitation synthesis for Mn4+-activated fluorides
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The use of a single ammonium acidic salt towards simple green co-precipitation synthesis for Mn4+-activated fluorides

机译：使用单次铵酸性盐对Mn4 +活化氟化物的简单绿色共析合成

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摘要

Herein, a simple green co-precipitation route for Me4+-activated fluorides has been realized via individually using the aqueous acidic salt NH4HF2 as a solvent. The systematic explorations of ionization, erosion, solvent concentration, solvency on reactants, and reaction with an extra weak acid disclosed that the near-saturated aqueous NH4HF2, ionizing into abundant HF2-, H+ and F- ions, exhibited large dissolving capacity and good stabilization on Mn4+ without obvious toxicity. The green synthesized example of Cs2GeF6:Mn4+ emitted a typical narrow band red light at 633 nm with normal optimal doping at similar to 8 at%. Compared with its contrast prepared from the HF system, it experienced only similar to 10% reduction in quantum efficiency and slight emission attenuation below 150 degrees C as the more humidity-sensitive weaker acid surface aroused lattice thermal vibration. The further action as red component fabricated a high-quality warm white light-emitting diode (W-LED) with a high color rendering index (Ra similar to 91), high luminous efficacy (similar to 149 lm W-1), low correlated color temperature (similar to 3211 K), and good color stability against the operating environment. Combined with the universal synthesis of A(2)XF(6):Mn4+ (A = K, Rb, Cs; X = Si, Ge), our findings can probably open up a simple and feasible green synthetic strategy for efficient Mn4+-doped fluorides using acidic salts.
机译：在此，通过使用酸性盐NH 4 HF 2单独使用酸性盐NH 4 HF 2作为溶剂来实现用于ME4 +活氟化氟的简单绿色共沉淀途径。电离，腐蚀，溶剂浓度，反应物溶剂的系统探索，以及与额外弱酸的反应公开：近饱和NH 4 HF 2水溶液，电离为丰富的HF2-，H +和FIENT，表现出大的溶解能力和良好的稳定性在MN4 +上没有明显的毒性。 CS2GEF6的绿色合成例：Mn4 +在633nm处发出典型的窄带红光，其正常最佳掺杂类似于8at％。与由HF系统制备的对比相比，它的量子效率降低仅在150℃以下的量度降低和低于150℃的少量排放衰减，因为更湿度敏感的较弱的酸表面唤起晶格热振动。作为红色部件的进一步动作制造了具有高色彩渲染指数（RA类似于91）的高质量暖白发光二极管（W-LED），发光效率高（类似于149 LM W-1），低相关色温（类似于3211 k），以及对操作环境的良好颜色稳定性。结合A（2）XF（6）：Mn4 +（a = k，Rb，Cs; x = Si，Ge）的普遍合成，我们的研究结果可能为高效的MN4 + - + + - + +使用酸性盐的氟化物。

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