纳米Ag颗粒掺杂方式对NaYF_4∶Yb^(3+)/Er^(3+)上转换发光材料发光性能的影响  

Influence of Different Doped Ways of Ag Nanoparticles on the Luminescent Property of NaYF_4∶Yb^(3+)/Er^(3+) Up-conversion Material

作　　者：郭聪[1] 张海明[1] 张晶晶[1] 姬子晔 吴磊[1] 

机构地区：[1]天津工业大学理学院,天津300387

出　　处：《人工晶体学报》2016年第2期460-464,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(61274064)

摘　　要：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%。The Yb3 ＋/ Er3 ＋co-doped Na YF4up-conversion luminescent material was prepared by hydrothermal method. The structure,morphology and optical properties of the product which was doped by the Ag nanoparticles at different time during the formation of Na YF4∶ Yb3 ＋/ Er3 ＋were characterized by XRD,SEM and photoluminescence（ PL）. The results show that the powder diffraction intensity increases when the Ag nanoparticles were added before the Na YF4∶ Yb3 ＋/ Er3 ＋being formed. The crystal phase changed partially from hexagonal to cubic in the case of Ag nanoparticles added after the Na YF4∶ Yb3 ＋/ Er3 ＋being formed. The crystallization of Na YF4∶ Yb3 ＋/ Er3 ＋was improved by adding the Ag nanoparticles before the Na YF4∶ Yb3 ＋/Er3 ＋being formed. The diameter of the original hexagonal columns changed smaller and there were new spherical nanoparticles around the hexagonal columns. The up-conversion luminescence intensity of the Na YF4∶ Yb3 ＋/ Er3 ＋powders which were doped by Ag nanoparticles before the Na YF4∶ Yb3 ＋/ Er3 ＋being formed was increased by 36% compared with the un-doped Na YF4∶ Yb3 ＋/ Er3 ＋powders.

关 键 词：AG纳米颗粒 NaYF4∶Yb3+/Er3+ 光致发光 

分 类 号：O482[理学—固体物理]