中文摘要：

利用LSS（Liquid-Solid-Solution）方法,通过改变稀土元素Tb~（3＋）离子的掺杂浓度,制备了一系列晶粒尺寸小、形貌均匀的Tb~（3＋）离子掺杂CaF_2纳米晶粒.采用透射电子显微镜（TEM）和X射线粉末衍射仪（XRD）表征制备样品的形貌和晶体结构;用光致发光光谱（PL）表征不同掺杂浓度下样品的发光性能.实验结果表明：所有样品均保持立方萤石结构,无其他杂质相.光致发光测试表明Tb~（3＋）离子最佳掺杂浓度为10%;在325 nm波长激发下,在545 nm有最强绿光发光峰,杰出的荧光特性使Tb~（3＋）离子掺杂CaF_2纳米晶粒在荧光标记应用中成为一种有前景的绿色荧光材料.

英文摘要：

A series of the Tb3＋ doped CaF2 nanocrystals with different Tb3＋ concentration were successfully synthesized by a Liquid-solid-sduthon （LSS）. The structure and morphology of samples were characterized by X-ray diffraction （ XRD ） and transmission electron microscopy （ TEM ）, respectively. The luminescence properties of samples with different doping concentration were characterized by photoluminescence spectra （PL）. The experimental results show that all the samples are in good agreement with the cubic phase of CaF2, and no other impurity phase. Photoluminescence spectra indicate that the optimal doping amount of concentration of Tb3 ＋ is 10%. The Tb3＋ doped CaF2 nanocrystals emit strong green light was located at 548 nm with 325 nm light excitation. The excellent luminescence properties make Tb3＋ doped CaF2 nanoerystals a new promising green luminescent materials for fluorescent labeling applcication.