Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University, Baoding 071002, China.
College of Electronic and Information Engineering, Hebei University, Baoding 071002, China.
Phys Chem Chem Phys. 2023 Mar 29;25(13):9158-9167. doi: 10.1039/d3cp00562c.
Owing to some special superiority, luminescence ratiometric thermometry, mainly including dual excitations single emission and single excitation dual emissions, has gained popularity over the past few years. However, developing novel ratiometric thermometry that can work in multi-mode is still a challenge. Here we report a temperature measurement method based on the photoinduced luminescence of Tb in the low-cost and easy to prepare calcium tungstate. Both the conventional luminescence intensity ratio (LIR) and recently developed single-band ratiometric (SBR) strategies have been achieved in our materials. On the one hand, upon excitation of the charge transfer state, the emissions from the excited D and D states present different responses to temperature. A thermometry depending on the LIR between these two emissions has thus been developed, with adjustable relative sensitivity that is sensitive to the excitation wavelength. On the other hand, both the emissions from the excited D and D states respond dissimilarly to the temperature variation. A SBR thermometer has thus been constructed with two excitation modes, reaching the maximum relative sensitivity of 1.83% K at 573 K. The present work is expected to inspire other researchers to exploit more multi-mode optical ratiometric thermometries.
由于一些特殊的优势，比率荧光测温技术，主要包括双激发单发射和单激发双发射，在过去几年中得到了广泛的关注。然而，开发能够在多模式下工作的新型比率荧光测温技术仍然是一个挑战。在这里，我们报告了一种基于低成本且易于制备的钨酸钙中 Tb 的光致发光的温度测量方法。在我们的材料中，已经实现了传统的发光强度比（LIR）和最近开发的单带比率（SBR）策略。一方面，在电荷转移态的激发下，来自激发的 D 和 D 态的发射对温度呈现出不同的响应。因此，已经开发出了一种依赖于这两个发射之间的 LIR 的测温方法，其相对灵敏度可调，对激发波长敏感。另一方面，来自激发的 D 和 D 态的发射对温度变化的响应也不同。因此，已经构建了一种具有两种激发模式的 SBR 温度计，在 573 K 时达到最大相对灵敏度 1.83% K。本工作有望激发其他研究人员开发更多的多模式光学比率荧光测温技术。
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