Yb^(3+)/Er^(3+)(Ho^(3+))掺杂NaYF_4与Y_2O_2S荧光粉的制备与上转换发光

Preparation and Upconversion Iuminescence of NaYF_4 and Y_2O_2S co-doped with Yb^(3+)/Er^(3+)(Ho^(3+)) Phosphor

比较研究了Yb/Er(Ho)共掺六方相NaYF4和Y2O2S在980nm LD泵浦下的上转换发光.研究结果表明,NaYF4:20%Yb,1%Er的发光明显强于NaYF4:20%Yb,1%Ho,而Y2O2S:6%Yb,0.25%Ho与Y2O2S:6%Yb,0.5%Er却呈现相近的总发射强度.分析认为,Yb/Er和Yb/Ho之间的不同能量传递机制是导致上述现象的主要因素.

Having studied the upconversion luminescence properties of Yb/Er（Ho） co- doped NaYF4 and Y2 O2 S phosphors, we find the results indicate that the emissive intensity of NaYF4.20%Yb, 1 %Er is stronger than that of NaYF4 ：20%Yb,1%Ho, while the Y202S：6%Yb,0.5%Ho and Y2O2S.-6%Yb, 0.5%Er present the similar total emissive intensity fer mechanism between Yb/Er and Yb/Ho pairs. This can be explained by the different energy trans