Materials with multiple modes for measuring extreme environmental indicators are urgently required. Herein, a kind of bright yellow-green emitting phosphor Sr₈MgSc(PO₄)₇:Eu²⁺ with applications in solid-state luminescence and multi-mode sensing in extreme environments has been synthesized. The assembled warm white LED device has a higher color rendering index (R_a = 93.2), a lower correlated color temperature (CCT = 4718 K) and appropriate chromaticity coordinates (0.3509, 0.3397). Furthermore, from room temperature (RT, 298 K) to 78 K, the emission color rapidly changes from yellow-green to orange. The maximum relative sensitivity and absolute sensitivity were calculated as S_a (max) = 6.36 × 10⁻² K⁻¹ and S_r (max) = 1.8% K⁻¹, respectively. In the process of applying pressure, the phosphor withstands a pressure of up to 21.5 GPa. The calculation method of its pressure sensitivity is developed by using three strategies. The sensitivity obtained by the LIR method is the largest, which is S_pr (max) = 116.22% GPa⁻¹. In conclusion, the bright yellow-green phosphor Sr₈MgSc(PO₄)₇:Eu²⁺, showing a rapid and sensitive temperature and pressure response, has considerable potential for application in solid state lighting, low temperature sensing, and pressure sensing.

中文翻译：

---

Sr8MgSc（PO4）7：Eu2+ 荧光粉：用于固态照明和极端环境多模传感研究的 d-f 过渡驱动应用


迫切需要具有多种测量模式的材料来测量极端环境指标。本文合成了一种明亮的黄绿色发光荧光粉 Sr₈MgSc（PO₄）₇：Eu²⁺，其应用于固态发光和极端环境下的多模传感。组装的暖白光 LED 器件具有较高的显色指数 （R_a = 93.2）、较低的相关色温 （CCT = 4718 K） 和适当的色度坐标 （0.3509， 0.3397）。此外，从室温 （RT， 298 K） 到 78 K，发射颜色从黄绿色迅速变为橙色。最大相对灵敏度和绝对灵敏度分别计算为 S_a （最大值） = 6.36 × ^{10-2 K-1} 和 S_r （最大值） = 1.8% ^K-1。在施加压力的过程中，荧光粉可承受高达 21.5 GPa 的压力。其压力敏感度的计算方法是通过使用 3 种策略开发的。通过 LIR 方法获得的灵敏度最大，为 S_pr （max） = 116.22% GPa-1。综上所述，明亮的黄绿色荧光粉 Sr₈MgSc（PO₄）₇：Eu²⁺ 表现出快速灵敏的温度和压力响应，在固态照明、低温传感和压力传感方面具有相当大的应用潜力。