荧光粉
兴奋剂
材料科学
离子
灵敏度(控制系统)
荧光
发光
分析化学(期刊)
重复性
光电子学
激发
光学
化学
电子工程
工程类
物理
电气工程
色谱法
有机化学
作者
Xinyang Shi,Muhua Zhang,Xihua Lu,Qinan Mao,Lang Pei,Hua Yu,Jian Zhang,Meijiao Liu,Jiasong Zhong
标识
DOI:10.1016/j.mtchem.2022.101264
摘要
Currently, with increasing demand for non-contact fluorescence intensity ratio-based optical thermometry, a novel phosphor with high-efficiency, dual-emitting centers, and differentiable temperature sensitivity is more and more urgent to develop. In this work, an efficient dual-emitting center optical thermometry with high sensitivity and multicolor tunable in Ca2Sb2O7:Bi3+, Eu3+ phosphor is firstly designed and successfully prepared. Under 330 nm excitation, the fabricated phosphor presents the featured and distinguishable emissions of Bi3+ and Eu3+ ions. The high efficiency energy transfer from Bi3+ to Eu3+ ions is proved and its corresponding mechanism belongs to dipole-dipole interaction. By modulating the ratio of Bi3+/Eu3+, the multicolor changes from blue to pink are realized. Based on the discriminative thermal quenching behavior between Bi3+ and Eu3+, the fluorescence intensity ratio of Eu3+ to Bi3+ in Ca2Sb2O7 samples illustrates excellent optical thermometry performance from 298 to 523 K. The maximum absolute sensitivity (Sa) and relative sensitivity (Sr) reach as high as 0.2773 K−1 at 523 K and 2.37% K−1 at 448 K, respectively. Notably, the discriminated surrounding temperature can be directly confirmed by observing the emitting color from purple to orange-red with the temperature increase from 298 to 523 K. Furthermore, the as-prepared phosphor materials also demonstrate outstanding repeatability and excellent reversibility. These results exhibit that the designed Ca2Sb2O7:Bi3+, Eu3+ phosphors have great promising applications in the field of non-contact optical temperature thermometry and thermochromic.
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