利用“纳米反应器”一步合成YF_3:Yb^(3+),Er^(3+)纳米粒子及光谱特性  

One-step synthesis of Yb^(3+),Er^(3+)-codoped YF_3 nanoparticles via nano-reactor and their spectral characteristic

作　　者：曹亮军[1] 田雪英[1] 刘伟[1] 闫景辉[1] 翟庆洲[2] 连洪洲[3] 

机构地区：[1]长春理工大学化学与环境工程学院,吉林长春130022 [2]长春理工大学纳米技术研究中心,吉林长春130022 [3]中国科学院长春应用化学研究所稀土资源利用国家重点实验室,吉林长春130022

出　　处：《红外与毫米波学报》2011年第6期518-521,共4页Journal of Infrared and Millimeter Waves

基　　金：国家自然科学基金(50702057);吉林省科技厅和吉林省教育厅重大科技支撑项目(20050507;2009JYT19)

摘　　要：采用微乳液法在室温下快速合成出YF3:Yb3+,Er3+纳米粒子,X射线衍射图(XRD)与YF3标准卡片PDF#74-911非常吻合,经扫描电镜(SEM)分析表明所制备的纳米粒子为球形,粒径约为32 nm.同时研究了YF3:Yb3+,Er3+的下转换光谱和上转换光谱,实验发现,下转换光谱最强发射峰位于1544 nm;在上转换光谱中,这两种离子主要发红光和绿光,且红光强于绿光,通过分析输出光强与泵浦光强的双对数曲线,发现不管是红光还是绿光都是双光子发射,最后对红、绿光的上转换机理进行了分析.Yb3＋,Er3＋-codoped YF3 nanoparticles were rapidly prepared via microemulsion method at room temperature.The nanoparticles were characterized by x-ray diffraction（XRD） and scanning electron microscopy（SEM）.The XRD pattern matched well with card PDF#74-911.SEM patterns indicated that the nanoparticles were spherical morphology with the average size about 32 nm.Downconversion spectrum and upconversion spectrum were investigated.It was found that the predominant emission peak of downconversion spectrum was located at 1544 nm.In the upconversion spectrum,the intensity of red emission was stronger than that of green.In this material,both the red and green emissions were due to two photon processes.Meanwhile,upconversion mechanism and process were also analyzed.

关 键 词：微乳液法 稀土氟化物 荧光光谱 

分 类 号：O613.41[理学—无机化学] O614.344[理学—化学]