Institute of Optoelectronic Materials and Devices, China Jiliang University, Hangzhou 310018, China.
College of Materials and Chemistry, China Jiliang University, Hangzhou 310018, China.
Dalton Trans. 2021 Jan 27;50(3):917-925. doi: 10.1039/d0dt03762a.
Octahedral NaBi(WO4)2:Er3+/Yb3+ phosphors were synthesized by a hydrothermal method. Intense green upconversion emissions from both 2H11/2 → 4I15/2 and 4S3/2 → 4I15/2 transitions of Er3+ ions were observed and the appropriate energy gap between them is very suitable for temperature sensing requirement based on the fluorescence intensity ratio (FIR) technique. A flexible and portable all-fiber temperature sensing device was established and used to assess the temperature sensing characteristics of NaBi(WO4)2:Er3+Yb3+ phosphors. A maximum absolute sensitivity of 0.014 K-1 is achieved at 423 K and the temperature absolute error is -0.5 K to +0.6 K. The stepwise heating and cooling processes confirm the good stability and recyclability of the all-fiber temperature sensor, which lays the foundation for actual temperature measurement. Based on the high flexibility and accuracy of the temperature sensor, the monitoring of body temperature was realized in real time and continuously, which may provide new development prospects for effective health tracking and improvement of medical care quality.
八面体 NaBi(WO4)2:Er3+/Yb3+ 荧光粉通过水热法合成。观察到来自 Er3+离子的 2H11/2→4I15/2 和 4S3/2→4I15/2 跃迁的强烈上转换绿光发射，它们之间适当的能量间隙非常适合基于荧光强度比 (FIR)技术的温度传感要求。建立了一种灵活便携的全光纤温度传感装置，并用于评估 NaBi(WO4)2:Er3+Yb3+ 荧光粉的温度传感特性。在 423 K 时实现了 0.014 K-1 的最大绝对灵敏度，温度绝对误差为-0.5 K 至+0.6 K。逐步加热和冷却过程证实了全光纤温度传感器具有良好的稳定性和可重复性，为实际温度测量奠定了基础。基于温度传感器的高灵活性和准确性，实时连续地实现了体温监测，这可能为有效健康跟踪和提高医疗质量提供新的发展前景。
