采用低温水热法合成了高质量的六方相NaYF4∶Ln3+ (Ln=Sm,Pr)微米棱柱,其直径约为1μm,长约为2～5μm,端口呈规则六边形.利用X射线衍射、场发射扫描电镜、透射电子显微镜和高分辨透射电子显微镜对样品的物相、形貌和结构进行了分析与表征.室温下,采用稳态荧光光谱仪研究了六方相NaYF4 ∶ Ln3+的光致发光性质,讨论了不同掺杂浓度对发光强度的影响.在400nm波长激发下,在500～720nm范围内观察到NaYF4 ∶Sm3+较强的橙色和红色发光,最强峰位于594nm；在444nm波长激发下获得了NaYF4∶Pr3+的蓝色和红色发光.
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