Yang Chunwei, Liu Jianxia, Jia Chengzheng, Qu Song, Li Wenting, Song Jiatong, Guo Ning
Department of Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China.
Inorg Chem. 2024 Aug 5;63(31):14779-14785. doi: 10.1021/acs.inorgchem.4c02640. Epub 2024 Jul 25.
Currently, optical thermometry has received widespread attention because of its noncontact and wide temperature range, but most of them are based on the application of dual-band optical ratiometric thermometry, so the development of a single-band ratiometric (SBR) optical thermometry, which is easier to analyze and use, is particularly important. In this work, the position of the intervalence charge-transfer (IVCT) band for NaGdLaTiO:Pr ( = 0, 0.5, 1.0, 1.5, 2.0) was modulated using Gd/La substitution, enhancing the thermal response difference of Pr D → H under charge-transfer band (CTB) and IVCT band excitation, thereby achieving high-sensitivity SBR optical thermometry, and the maximum relative sensitivity () reached 2.95% (at 298 K). In addition, this series of phosphors has high-color-purity red emission, indicating that it has potential for multifield applications.
目前，光学测温法因其非接触性和宽温度范围而受到广泛关注，但其中大多数基于双波段光学比率测温法的应用，因此开发一种更易于分析和使用的单波段比率（SBR）光学测温法尤为重要。在这项工作中，通过Gd/La取代调制了NaGdLaTiO:Pr（= 0、0.5、1.0、1.5、2.0）的价间电荷转移（IVCT）带的位置，增强了Pr D→H在电荷转移带（CTB）和IVCT带激发下的热响应差异，从而实现了高灵敏度SBR光学测温法，最大相对灵敏度（）达到2.95%（在298 K时）。此外，这一系列荧光粉具有高色纯度的红色发射，表明其具有多领域应用潜力。
