Abstract Nowadays, the fluorescent materials applying to the temperature sensing field are mostly based on the rare-earth ions, scarcely non-rare-earth co-doped optical thermometers have been invested, let alone the phosphors with dual transition metal ions. Herein, we advocate a novel rare-earth free activated fluorescent material co-doped with dual transition metal ions and adopt the fluorescence intensity ratio-based strategy to measure the temperature. Firstly, this kind of optical material possesses the feasibility to be mass-produced for its intrinsic merits of economic rationality and nontoxicity. Besides, benefitting from the different thermal properties of sensitizer and activator ions, this material is supposed to be an excellent material for temperature sensing. It turns out that this Ti4+,Mn4+ coactivated optical material possesses an excellent temperature measuring performance with the optimal absolute sensitivity as high as 3.79% K−1. What is more, the prominent signal discriminability and accurate temperature detection ability could be enabled deriving from two well-separated emission bands and excellent temperature resolution. Furthermore, the photoluminescence properties, the crystalline structure, the crystal field strength, and the viability of the Chromaticity Coordinates-based method to measure temperature are manifested in this paper as well. Overall, it is anticipated that this novel coactivated optical material with binary luminescent centers could be a promising candidate for temperature sensing, and this preliminary study would invoke researchers’ passion for exploring more dual activators-based optical thermometric materials in the absence of rare-earth ions.

中文翻译：

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锌酸盐荧光粉的光致发光和比率荧光温度传感能力

摘要 目前应用于温度传感领域的荧光材料大多以稀土离子为主，非稀土共掺杂光学温度计的投入甚少，更不用说双过渡金属离子荧光粉了。在此，我们提倡一种新型的稀土自由激活荧光材料，共掺杂双过渡金属离子，并采用基于荧光强度比的策略来测量温度。首先，这种光学材料具有经济合理和无毒的内在优点，具有大规模生产的可行性。此外，受益于敏化剂和活化剂离子不同的热特性，这种材料被认为是一种极好的温度传感材料。原来这个Ti4+，Mn4+ 共激活光学材料具有优异的测温性能，最佳绝对灵敏度高达 3.79% K-1。此外，两个分离良好的发射带和出色的温度分辨率可以实现突出的信号辨别力和准确的温度检测能力。此外，本文还展示了基于色度坐标测量温度的方法的光致发光特性、晶体结构、晶体场强和可行性。总体而言，预计这种具有二元发光中心的新型共激活光学材料可能是温度传感的有希望的候选材料，