Abstract By studying the temperature-induced red-shift of the V O charge transfer band (CTB) edge in YVO4:10% Eu3+, we demonstrate a high-sensitive strategy for optical temperature sensing using the combination of the temperature-induced enhancement of the excitation in the tail of the CTB and the thermal population of 5D1 state of Eu3+. Under a constant 358 nm excitation, the integrated emission intensity corresponding to 5D1 → 7F1 transition of Eu3+ exhibits drastic temperature dependence ranging from 300 to 480 K. A high relative sensitivity SR was obtained to be 3923/T2. Temperature cycling tests were performed to evaluate the reusability and feasibility as temperature sensors. Our results indicate the potential use of the proposed strategy for high performance optical thermometry.

中文翻译：

---

基于YVO4中Eu3+的5D1发射的高灵敏度光学温度传感

摘要 通过研究 YVO4:10% Eu3+ 中 VO 电荷转移带 (CTB) 边缘的温度诱导红移，我们展示了一种结合温度诱导增强激发的高灵敏度光学温度传感策略。在 CTB 的尾部和 Eu3+ 的 5D1 状态的热种群。在恒定的 358 nm 激发下，对应于 Eu3+ 的 5D1 → 7F1 跃迁的积分发射强度表现出从 300 到 480 K 的剧烈温度依赖性。获得的高相对灵敏度 SR 为 3923/T2。进行温度循环测试以评估作为温度传感器的可重复使用性和可行性。我们的结果表明所提出的策略可用于高性能光学测温。