研究了Er3+和Yb3+共掺杂的CaF2纳米材料的制备及其紫外上转换发光性质。在980 nm二极管激光器激发下，该材料可发出相对较强的紫外和绿色双色上转换发光。研究了敏化离子Yb3+以及发光中心离子Er3+掺杂量对该材料紫外上转换发光相对强度的影响，并进一步对该材料紫外上转换发光增强的可能机制进行了探讨。

Near-infrared (NIR) to near-ultraviolet (NUV) upconversion (UP) luminescence properties were explored under 980 nm laser diode (LD) excitation in Yb3+, Er3+ codoped calcium fluoride (CaF2∶Yb3+, Er3+) nanoparticles. The strong enhancement at 407 nm was observed. The results show that the UV enhancement is independent on both the Er3+ concentration and the excited power, while dependent on the annealed time and the particle size. The UP mechanical and thermodynamics process were also discussed.