设计并合成了掺杂不同Nd3+离子浓度的氟化镧纳米颗粒, 并用油酸进行了表面修饰, 使得这类纳米颗粒可分散于常见的有机溶剂中形成透明、均一、稳定的溶液。对纳米颗粒的结构、晶相以及发光性能进行了表征。固体和溶液材料在1 060 nm都有强的发射峰, 说明纳米晶格可有效地保护Nd3+离子免受外界环境对发光的猝灭影响。纳米颗粒有机溶液的吸收损耗和散射损耗测试结果表明, 其总损耗系数能够满足激光介质材料的损耗要求, 为该材料的实用化打下了基础。

LaF3 nanocrytals with different Nd3+ concentration were designed, synthesized and modified by oleic acid. This kind of nanocrystals can be dissolved in many organic solvents and form a transparent, uniform and stable solution. The structure, crystal phase and luminescence properties of LaF3∶Nd3+ nanocrytals were characterized and studied. The nanocrytals show strong emission at 1 060 nm not only in solid but also in solution. This illustrates that the nanocrystal lattice can efficiently protect Nd3+ ions from the influence of environment on the luminescence. Meanwhile, the absorption loss and scattering loss of LaF3 nanocrystals in organic solution were tested by our own system. The total loss coefficient can meet the requirements for laser medium material. These results show that LaF3∶Nd3+ nanocrystals may be used for liquid laser medium in the future.