Abstract Mn4+ and Sm3+ singly doped and Mn4+/Sm3+ codoped CaGdMgSbO6 (abbreviated as CGMS) phosphors with double perovskite structure have been successfully prepared by the solid-state reaction. X-ray powder diffraction and luminescence spectra were used to analysis their crystal phases and optical properties. Especially, temperature-dependent luminescence spectra and luminescence decay curves of the CGMS:Mn4+/Sm3+ phosphor were measured at a large temperature range of 298–573 K Mn4+ and Sm3+ possess different trends of luminescence change where the luminescence intensity of Mn4+ ions decreases much more rapidly compared to that of Sm3+ ions as the temperature increases. Accordingly, based on the fluorescence intensity ratio (FIR) between the two activator Mn4+ and Sm3+ as well as the luminescence lifetime of Mn4+, the optimal relative sensitivity of temperature sensing in the CGMS:Mn4+/Sm3+ sample could reach 1.54% K−1 at 473 K and 1.23% K−1 at 523 K, respectively. All these indicate that this CGMS:Mn4+/Sm3+ material is a promising candidate for dual-mode high-sensitivity optical temperature sensing.

中文翻译：

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双钙钛矿CaGdMgSbO6:Mn4+/Sm3+荧光粉的双模光学温度传感行为

摘要 通过固相反应成功制备了具有双钙钛矿结构的Mn4+和Sm3+单掺杂以及Mn4+/Sm3+共掺杂CaGdMgSbO6（简称CGMS）荧光粉。X射线粉末衍射和发光光谱用于分析它们的晶相和光学性质。特别是，在 298-573 K 的大温度范围内测量了 CGMS:Mn4+/Sm3+ 荧光粉的温度依赖性发光光谱和发光衰减曲线，Mn4+ 和 Sm3+ 具有不同的发光变化趋势，其中 Mn4+ 离子的发光强度下降得更多与 Sm3+ 离子相比，随着温度的升高而迅速增加。因此，基于两种活化剂 Mn4+ 和 Sm3+ 之间的荧光强度比 (FIR) 以及 Mn4+ 的发光寿命，CGMS:Mn4+/Sm3+ 样品中温度传感的最佳相对灵敏度分别在 473 K 和 523 K 时达到 1.54% K-1 和 1.23% K-1。所有这些都表明这种 CGMS:Mn4+/Sm3+ 材料是双模高灵敏度光学温度传感的有前途的候选材料。