As an important upconversion illuminant material, LiREF₄ nanocrystals were efficiently synthesized in a continuous reactor with the assistant of a new precursor solution. The employed trioctylamine solvent in the solution had a strong interaction with HF, and helped to avoid the generation of unnecessary solid components as LiF and NH₄REF₄ during the reaction. A silicon carbide reactor was developed to carry out the synthesis reaction, where LiYF₄:Yb,Er/Ho/Tm quickly nucleated in 5 min at 300 °C. The reaction time to successfully prepare 15 nm sized nanocrystals was less than 30 min, and the space-time yield of the flow synthesis method was 14.8 times that of a control group batch reaction. The prepared nanocrystals had a strong illuminant ability, which could find its use in the area of security mark printing.

作为重要的上转换发光材料，LiREF ₄纳米晶体在连续反应器中借助新的前体溶液有效合成。溶液中使用的三辛胺溶剂与HF有很强的相互作用，并有助于避免在反应过程中产生不必要的固体成分，如LiF和NH ₄ REF ₄。开发了碳化硅反应器以进行合成反应，其中LiYF ₄：Yb，Er / Ho / Tm在300°C下于5分钟内迅速成核。成功制备15 nm尺寸纳米晶体的反应时间少于30分钟，流动合成方法的时空产率是对照组间歇反应的14.8倍。制备的纳米晶体具有很强的发光能力，可以在安全标记印刷领域找到应用。