NaBiF4作为一种新型的上转换发光基质材料，具有优异的发光性能。本文以聚乙烯吡咯烷酮(PVP)作为表面活性剂，通过溶剂热法成功制备出水溶性NaBiF4∶Yb3+/Er3+/Mn2+上转换微米晶，并对其晶相、形貌及发光性能进行了表征。在980 nm激发光条件下，NaBiF4∶Yb3+/Er3+/Mn2+可发射出强烈的绿色发光，且发光强度随Mn2+掺杂浓度的提高呈现先增强后减弱的趋势，表现出优异的上转换发光性能。同时，NaBiF4∶Er3+/Yb3+/Mn2+上转换发光对温度具有良好的依赖性，有望成为潜在的温度传感器材料。

As a new type of upconversion matrix, NaBiF4 has been found with excellent luminescence properties. In this paper, polyvinyl pyrrolidone(PVP) was used as the surfactant, and the water-soluble NaBiF4∶Er3+/Yb3+/Mn2+ particles were successfully prepared by a solvothermal synthesis. The crystal phase, morphology and luminescence properties of the microcrystals were studied. Under the excitation of 980 nm laser, NaBiF4∶Er3+/Yb3+/Mn2+ microcrystals show excellent upconversion luminescence(UCL). The upconversion emission intensity increased at first and then decreased with the increase of the dopant concentrations of Mn2+ ions. Moreover, the temperature-dependent UCL properties of NaBiF4∶Yb3+/Er3+/Mn2+ were investigated systematically under 980 nm excitation. The microcrystals could be a potential candidate for sensitive temperature sensor.