Up-Conversion Luminescence and Optical Temperature Sensing of Tb3+, Yb3+, Er3+ Doped (Gd, Y, Lu)2O2S Series Phosphors

The phase analysis, luminous intensity, and luminescence lifetime of different doping concentrations of Tb 3+ (1 mol %–11 mol %), Yb 3+ (9 mol %–54 mol %), Er 3+ (0.1 mol %–1.1 mol %) ions and different introduction concentrations of Y 3+ (1 mol %–6 mol %) and Lu 3+ (0.5 mol %–3 mol %) of Gd 2 O 2 S series phosphors were studied systematically. In addition, the energy transfer model of Tb 3+ -Yb 3+ -Er 3+ was established by analyzing the changes of luminous intensity and luminescence lifetime of novel (Gd, Y, Lu) 2 O 2 S phosphors co-doped Tb 3+ , Yb 3+ and Er 3+ which were prepared by the coprecipitation-high temperature solid-state reaction method. The luminescence intensity ratio equations of the sample excited by 980 nm was obtained at 313–553 K. And the absolute sensitivities were 0.0033 (313 K). This work is of reference value to the study of the mechanism of up-conversion system.