Yang Yuanbo, Li Leipeng, Suo Hao, Li Panlai, Wang Zhijun, Zhang Zhiguo
Opt Express. 2022 Jan 3;30(1):265-274. doi: 10.1364/OE.445293.
Recently, single-band ratiometric (SBR) thermometry becomes a hot-spot in the research field of optical thermometry. Here we propose a new SBR thermometry by combining the temperature-induced red shift of charge transfer state (CTS) of W-O and Eu-O with the ground state absorption (GSA) and excited state absorption (ESA) of Eu. The emitting intensity of the D-F transition of Eu is monitored under CTS, GSA and ESA excitations at different temperatures. It is found that the SBR thermometry, depending on the combination of [GSA + CTS] of Eu doped calcium tungstate, has the highest relative sensitivity of 1.25% K at 573 K, higher than conventional luminescent ratiometric thermometry such as the H and S thermally coupled states of Er.
最近，单波段比率测温法成为光学测温研究领域的一个热点。在此，我们通过将W-O和Eu-O的电荷转移态（CTS）的温度诱导红移与Eu的基态吸收（GSA）和激发态吸收（ESA）相结合，提出了一种新的单波段比率测温法。在不同温度下，在CTS、GSA和ESA激发下监测Eu的D-F跃迁的发射强度。研究发现，基于Eu掺杂钨酸钙的[GSA + CTS]组合的单波段比率测温法在573 K时具有最高相对灵敏度1.25% K，高于传统的发光比率测温法，如Er的H和S热耦合态。
