Temperature sensor and field emission displays (FED) are the intensive topics for Sm³⁺ activated red phosphor. In this study, a novel lithium nitride red phosphor Li₂CaSi₂N₄:Sm³⁺ was successfully prepared by solid phase method. The photoluminescence and cathodoluminescence performances were systematically studied to explore the possibility in FED and temperature sensor applications. The results indicate that the Li₂CaSi₂N₄:Sm³⁺ phosphor features intense red emission under the UV light and cathode ray excitations. The phosphor also has a long red afterglow with an afterglow time of 12.7 min. Most importantly, Li₂CaSi₂N₄:Sm³⁺ exhibits excellent temperature sensitivity with the relative sensitivity of 4.8% K⁻¹ @473 K, which is higher than other temperature sensor materials. The thermal quenching mechanism was proposed based on a configurational-coordinate model. Moreover, excellent cathode ray saturation and aging resistance were observed in Li₂CaSi₂N₄:Sm³⁺. The results indicate that Li₂CaSi₂N₄:Sm³⁺ is a potential temperature sensor and FED materials.

温度传感器和场发射显示器 (FED) 是 Sm ³⁺激活红色磷光体的重点课题。本研究采用固相法成功制备了新型氮化锂红色荧光粉Li ₂ CaSi ₂ N ₄ :Sm ³⁺。系统地研究了光致发光和阴极发光性能，以探索在 FED 和温度传感器应用中的可能性。结果表明，Li ₂ CaSi ₂ N ₄ :Sm ³⁺荧光粉在紫外光和阴极射线激发下具有强烈的红色发射。该磷光体还具有较长的红色余辉，余辉时间为 12.7 分钟。最重要的是，Li ₂ CaSi ₂ N ₄ :Sm ³⁺表现出优异的温度灵敏度，相对灵敏度为4.8% K ^-1 @473 K，高于其他温度传感器材料。基于构型坐标模型提出了热猝灭机制。此外，在Li ₂ CaSi ₂ N ₄ :Sm ³⁺中观察到优异的阴极射线饱和性和抗老化性。结果表明，Li ₂ CaSi ₂N ₄ :Sm ³⁺是一种电位温度传感器和 FED 材料。