Mn^(2+)掺杂Ba_2LuF_7纳米晶的制备以及发光颜色调控  

Synthesis and Emission Color Manipulation of Mn^(2+)-doped Ba_2LuF_7 Nanocrystals

作　　者：毛益富 林春景[1] 杨璐璐[1] 梁永恩[1] 

机构地区：[1]广东白云学院物理系,广州510450

出　　处：《材料导报（纳米与新材料专辑）》2016年第1期48-51,共4页

摘　　要：通过水热法合成了Yb和Tm共掺的Ba2LuF7纳米晶。合成出的样品用透射电镜(TEM)和X射线粉末衍射仪(XRD)进行了表征。在980nm激光下测试了样品的发射光谱。结果表明纳米晶属于立方晶相,大小只有10~20nm。适当的稀土离子掺杂,可使样品发出较强的绿光和红光。通过在纳米晶中掺杂锰离子(Mn2+),可以调控绿光和红光的强度。此外锰离子(Mn2+)掺杂也会影响纳米晶的晶相和尺寸。当加入的Mn2+浓度较高时,会出现新的晶相,样品的形貌和尺寸也有显著的变化。Yb and Tm co-doped Ba2LuF7nanocrystals（NCs）were prepared via a rational hydrothermal method using oleic acid as the stablizing agent.The X-ray diffraction test reveal as-prepared NCs has a pure cubic crystal structure.The samples show intense green and red upconversion emission（UC）under the excitation of a 980 nm laser.Rational manipulation of green and red emission of the NCs was achieved using a simple strategy through manganese ions（Mn2＋）doping.The resulted reveal that increase of Mn2＋doping level make the change of the emitting light color from green to red.Moreover,Mn2＋doping also influences the crystalline phase and size of the resulting nanocrystals.

关 键 词：上转换发光 发光颜色 能量传递 

分 类 号：O69[理学—化学]