发光
荧光粉
分析化学(期刊)
材料科学
兴奋剂
热液循环
晶体结构
相(物质)
荧光
核化学
化学
结晶学
化学工程
光学
色谱法
光电子学
物理
工程类
有机化学
作者
Yini Mao,Pengfei Xian,Li Jiang,Shanshan Hu,Jianfeng Tang,Jun Yang
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2020-01-01
卷期号:49 (23): 7862-7871
被引量:21
摘要
NaScF4:Yb3+/Er3+ crystals were successfully hydrothermally synthesized using distilled water as a single solvent. The crystal phase and morphology were characterized by XRD and SEM. Compared with organic solvents such as ethanol, ethylene glycol and ether, the molar ratio of Na/F/Sc plays an important role in the synthesis of NaScF4 crystals. Morphological control was achieved by changing the types of additives, and the relationship between morphology and luminescence properties was explored. The NaScF4:Yb3+/Er3+ phosphors exhibit strong green and red UC emissions under the excitation of 980 nm NIR. Optimal concentrations of Yb3+ and Er3+ for up-conversion luminescence performance were identified as 10% and 2%, respectively. Without any subsequent heat treatment process, the obtained NaScF4:10%Yb3+/2%Er3+ showed good temperature sensitivity. The temperature sensing ability was investigated by employing the dependence of the fluorescence intensity ratio (FIR) of the two thermal coupling energy levels of Er3+ (2H11/2→4I15/2 and 4S3/2→4I15/2) on temperature; the maximum sensitivity SA/SR was 0.00256 K-1/0.00317 K-1 at 548 K, and it increased to 0.00328 K-1/0.00413 K-1 after adding EDTA. In addition, an evaluation of temperature uncertainty during temperature measurement was performed, and was found to be 0.073 K and 0.095 K in the presence and absence of EDTA, respectively. Compared with some other reported materials, the obtained material shows a relatively superior temperature sensitivity, which provides new ideas for the improvement of temperature-sensitive materials.
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