光子上转换
碱金属
碱土金属
离子
分析化学(期刊)
化学
热液循环
纳米晶
兴奋剂
发光
荧光粉
核化学
纳米技术
材料科学
光电子学
化学工程
有机化学
色谱法
工程类
作者
Yuchao Shi,Meijuan Yuan,Jing Li,Fen Li,Wenhao Cui,Xuechen Jiao,Yaru Peng,Yuxin Huang,Li Chen
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2022-03-22
卷期号:61 (13): 5309-5317
被引量:20
标识
DOI:10.1021/acs.inorgchem.1c04041
摘要
Temperature-sensing media based on the fluorescence intensity ratio (FIR) of upconversion materials that suffer from low sensitivity owing to the small energy gap still have a need for new compounds with strong upconversion luminescence (UCL). In this work, a series of MSc2O4:Er3+/Yb3+ (M = Mg, Ca, Sr, and Ba) nanocrystals were prepared by a hydrothermal method using NaOH alkaline solution. The structure, morphology, and UCL characteristics of materials were investigated, and the red UCL of the CaSc2O4:Er3+/Yb3+ sample was dramatically enhanced by a factor of ∼12, ∼23, and ∼2000 compared with SrSc2O4, MgSc2O4, and BaSc2O4 samples, respectively. By adjusting alkali ions (Li+, Na+, K+), the UCL intensities of CaSc2O4:Er3+/Yb3+ and SrSc2O4:Er3+/Yb3+ samples were further improved, especially in the presence of Li+ ions. Excellent temperature-sensing behaviors are realized for CaSc2O4:Er3+/Yb3+ and SrSc2O4:Er3+/Yb3+ samples in the presence of Li+ ions, in which the maximum absolute sensitivity SA values are about 0.0041 and 0.0036 K-1 at 600 K and the corresponding relative sensitivity SR values are expressed as 1197/T2 and 1129/T2 (the current optimal SR = 1289/T2), respectively. The intense UCL and excellent SA and SR values indicate that CaSc2O4:Er3+/Yb3+ and SrSc2O4:Er3+/Yb3+ materials are promising candidates for application in high-temperature sensors working under 980 nm excitation.
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