To validate the feasibility of the strategy designed for ratiometric luminescence thermometry, the impacts of doping concentration and power density on the thermometric parameter and measurement result should be assessed but have normally been discounted. Herein, Yb³⁺/Er³⁺: SrMoO₄ upconverting (UC) phosphors were prepared via a hydrothermal method. The UC luminescence spectra were composed of the strong green emission and weak red emission bands upon 980 nm excitation. The thermally coupled levels (TCLs) of Er³⁺: ²H_11/2, ⁴S_3/2 and the non-thermally coupled levels (non-TCLs) of Er³⁺: ²H_11/2, ⁴F_9/2 were selected for fluorescence intensity ratio (FIR) thermometry, while the emissions originating from ⁴S_3/2 Stark sublevels to ⁴I_15/2 ground level were adopted for the valley to peak ratio (VPR) thermometry. The dependences of FIR-TCL (I₅₃₅/I₅₅₈), FIR-non-TCL (I₅₃₅/I₆₆₃) and VPR (I₅₅₃/I₅₅₈) values on the doping concentration and pump power density were analyzed. The results showed that the FIR-non-TCL and VPR data suffered from the interferences from the fluctuations in doping concentration and power density, causing the unavoidable measuring errors and unstable thermometric performance. Such problems could be solved by utilizing the concentration-insensitive and power-insensitive FIR-TCL, which also gained the high relative sensing sensitivity with the optimal value of 1.18% K^-1. This work will provide guidance on choosing the appropriate strategy for the reliable luminescence thermometry.

为了验证设计用于比率式发光测温的策略的可行性，应评估掺杂浓度和功率密度对测温参数和测量结果的影响，但通常不予考虑。在此，通过水热法制备Yb ³⁺ / Er ³⁺：SrMoO ₄上转换（UC）荧光粉。UC发光光谱由980 nm激发时的强绿色发射带和弱红色发射带组成。的热耦合水平铒（TCLs）³⁺：² ħ _11/2，⁴ š _3/2和Er的非热耦合电平（非TCLs）³⁺：²选择H ₁₁ / ^2，4 F _9/2作为荧光强度比（FIR）测温法，同时采用从⁴ S _3/2 Stark子级到⁴ I _15/2地平面的发射作为谷峰比（ VPR）测温法。FIR-TCL（I ₅₃₅ / I ₅₅₈），FIR-non-TCL（I ₅₃₅ / I ₆₆₃）和VPR（I ₅₅₃ / I ₅₅₈）的依赖性分析了关于掺杂浓度和泵浦功率密度的值。结果表明，FIR-non-TCL和VPR数据受到掺杂浓度和功率密度波动的干扰，导致不可避免的测量误差和不稳定的测温性能。利用浓度不敏感和功率不敏感的FIR-TCL可以解决这些问题，它还具有较高的相对感应灵敏度，最佳值为1.18％K ^-1。这项工作将为选择可靠的发光测温法的适当策略提供指导。