Phonon-Assisted Thermally Enhanced Up-conversion Fluorescence Lifetime Thermometry and Visualized Temperature Warning in Yb3+–Ho3+-Codoped Lu2Mo3O12

transition) and Commission Internationale de Eclairage chromaticity coordinate ratio (CIER) technology. Ultimately, the feasibility of the thermometer was verified to have high stability and temperature sensitivity (δT = 0.9 K, CIER), indicating that it is a prospective candidate for visualized temperature warning and sensing.