LiBaF_3∶Yb^(3+)/Er^(3+)(or Ho^(3+))的水热合成及上转换发光性能

Upconversion in Hydrothermally Synthesized LiBaF_3:Yb^(3+)/Er^(3+)(or Ho^(3+))

利用水热合成方法合成了LiBaF3∶Yb3+/Er3+(or Ho3+)(1%,1%)上转换荧光粉体,XRD分析表明所合成的样品为立方晶系结构.紫外-可见-近红外的漫反射吸收光谱表明,Er3+、Ho3+和Yb3+在1000 nm附近均有吸收.在980nm半导体激光激发下,LiBaF3∶Yb3+/Er3+(1%,1%)和LiBaF3∶Yb3+/Ho3+(1%,1%)都发射出较强的绿光和弱的红光,这些发射均为双光子过程.

LiBaF3 ：Yb^3＋/Er^3＋ （or Ho^3＋ ） has been prepared through hydrothermal synthesis. Powder X-ray diffraction （XRD） patterns have been presented to characterize the synthesized samples. The spectra of UV-Vis-NIR diffuse reflectance absorption indicate all of Er^3＋ ,Ho^3＋ and Yb^3＋ have absorption peaks near 1 000nm. Both LiBaF3 ： Yb^3＋/Er^3＋ （ 1%, 1% ） and LiBaF3 ： Yb^3 ＋ / Ho^3 ＋ （ 1%, 1% ） emit intense green and weak red up-conversion emissions under 980 nm excitation. Two-photon process accounts for the green and red emission of an Er^3＋ ion （or Ho^3＋ ） with the energy transfer from Yb^3＋ ion.