“…Obviously, the S a and S r values obtained are different, which indicates that the temperature measurement performance of the developed optical temperature sensor can be adjusted by changing the excitation wavelength. 17 Alternatively, the doping concentration of La 3+ also has an effect on the temperature sensing capacity. Under the same 310 nm excitation, the maximum S a value for the CSO:0.01Mn,0.04La 3+ phosphor was 0.048 K −1 at 440 K, and the maximum S r value was 2.78% K −1 at 420 K, which are different from the maximum S a and S r values of the CSO:0.01Mn,0.02La 3+ phosphor samples, respect-ively.…”