Abstract
The knowledge of the impact of the pump power and the doping concentration is valuable importance for optical temperature sensors. Ho3+/Yb3+ co-doped BaZrO3 ceramics were prepared successfully, and its structure is studied by XRD and SEM. The upconversion luminescence of Ho3+/Yb3+ co-doped BaZrO3 ceramics were studied at different doping concentration and pump power. By using fluorescence intensity ratio method, the temperature sensing behaviors were observed in temperature range of 300–580K based on non-thermal coupled levels 5S2, 5F5 → 5I8, and 5S2 → 5I7, 5I8. The maximum relative sensitivity is 36.35%K−1 at 525K, which is based on non-thermal coupled levels 5S2 → 5I7, 5I8 under pump power of 90mW with doping concentration 0.5mol%.
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