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中文摘要：
采用水热法，并在EDTA加入前后，分别以去离子水、乙醇为反应溶剂的体系中，合成了掺杂18%Yb^3＋、2%Er^3＋的NaYF4磷光上转换纳米材料。实验表明，当EDTA∶Ln^3＋（Ln=Y，Yb，和Er）的比例为1.6∶1时，在以乙醇为反应溶剂的体系中所得的材料在无需高温处理的情况下，得到了六角晶相较纯、颗粒分散较好、粒度大小均匀的上转换发光材料。且材料在可见光区具有较高的发射强度，适于应用到太阳能电池上。
英文摘要：
Nanocrystals of up-conversion phosphor,NaYF4 doped with 2% Er^3＋ and 18% Yb^3＋ were prepared by hydrothermal method. Before and after EDTA added, the effect of deionized water and ethanol used as reaction medium on the performance of up-conversion materials was studied. It is indicated that, even without high-temperature treatment, the as-synthesized nanoparticels showed pure hexagonal phase with uniform shape and size, and a good decentralization when the ration of EDTA/Ln^3＋ （Ln=Y, Yb, and Er） is 1.6∶1 based on ethanol solvent. The nanoparticels have a high luminescence in the visible light region, which could be well utilized by solar cells.
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