Up-conversion luminescence properties and temperature sensing of Er3+-Yb3+ doped silicate glass-ceramics

Using the melt quenching crystallization technique , Er 3+ -Yb 3+ co-doped glass-ceramics with NaLaSiO 4 crystalline phase have been successfully prepared. The optimal heat treatment condition was identified to be 605 °C/90 min. Optical band gap and Urbach energy changes were analyzed. Additionally, J-O parameters, radiative transition probabilities , fluorescence branching ratios, and stimulated emission cross sections for Er 3+ were also calculated. The results of XRD refinement and crystal locality optimization verify that Er 3+ is located with a low-symmetry site. The optimal emission intensity was achieved at Yb 3+ doping concentration of 0.7 %. Temperature sensing was accomplished using FIR , with S a-max of 1.15 x 10 −2 K −1 (498 K) and S r-max of 1.34 % K −1 (298 K). This Er 3+ -Yb 3+ doped silicate glass-ceramic has potential applications in up-conversion green lasers and optical thermometers.