Ho3+/Yb3+ 共掺杂ZnS上转换发光及其温度传感性能.

Pure hexagonal ZnS matrix phosphors with different mole ratio (Ho3+/Yb3+=1:3, 1:6,1:9, 1:12, 1:15, 1:19) were successfully synthesized by using high temperature solid method. The phase structure of the phosphors was analyzed by X-ray diffraction. The shape and size of the phosphors were revealed by scanning electron microscope, and the presence of Zn, S, Ho and Yb elements in the phosphors was revealed by energy dispersive X-ray spectroscopy. Under the excitation of 980 nm laser, Ho3+/Yb3+ co-doped ZnS phosphors emit bright green light visible to naked eyes, showing excellent green up-conversion characteristics. In addition, the temperature sensing characteristics of ZnS: Ho3+/Yb3+ phosphor were studied in the temperature range of 303~623 K, and the maximum absolute sensitivity was calculated to be 1.26% K-1. The change of luminescence color with temperature was reflected in the color coordinate. The results of this work indicate that rare earth doped ZnS matrix materials have great potential in the application of temperature sensing. [ABSTRACT FROM AUTHOR]