利用水热法制备了Yb3+,Er3+共掺杂NaYF4上转换发光材料.在实验中引入Ag纳米溶胶,研究了Ag纳米颗粒对NaYF4∶ Yb3+/Er3上转换发光材料结构、形貌和光学性质的影响.通过X射线衍射(XRD)、扫描电子显微镜(SEM)以及荧光光谱仪对样品的结构、形貌和光学性能进行了研究.结果表明,生成NaYF4∶ Yb3 +/Er3+反应前加入Ag纳米颗粒可使NaYF4∶ Yb3+/Er3+粉末的衍射峰强度增强;生成NaYF4∶Yb3+/Er3+反应后加入Ag纳米颗粒会使六方相样品部分转变成立方相.生成NaYF4:Yb3+/Er3+发光材料前引入Ag纳米溶胶可以大大提升晶体的结晶质量;生成NaYF4∶Yb3+ /Er3+发光材料后引入Ag纳米溶胶,原有六棱柱直径变小,产物有新的球状晶体生成.生成NaYF4∶Yb3+/Er3+反应前加入Ag纳米颗粒,可使NaYF4∶ Yb3+/Er3+上转换材料的发光强度显著增强,与未掺杂Ag纳米颗粒相比发光强度增加约36％.
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