@article{LI2022, 
author = {Xinyue LI and Yuzheng TONG and Jidong LIN and Shaoxiong WANG and Shichen LI and Daqin CHEN},
title = {Optical Thermometry Based on Fluorescence Intensity Ratio in Dual-Phases Glass Ceramics Containing LiYF4: Ln3+(Ln=Tb, Dy) and ZnAl2O4: Cr3+ Nanocrystals},
year = {2022},
journal = {Journal of the Chinese Ceramic Society},
volume = {50},
number = {4},
pages = {966-974},
keywords = {nanocrystal, optical thermometry, dual-phases glass ceramics, fluorescence intensity ratio},
url = {https://www.sciopen.com/article/10.14062/j.issn.0454-5648.20211030},
doi = {10.14062/j.issn.0454-5648.20211030},
abstract = {Dual-phases glass ceramics (GCs) containing LiYF4: Ln3+(Ln=Eu, Tb, Dy) and ZnAl2O4: Cr3+ nanocrystals (NCs) were fabricated by a conventional melt-quenching method. The structural and spectrographic characterizations indicate that Ln3+ can be doped into LiYF4 lattice and Cr3+ can be introduced into ZnAl2O4 lattice, respectively. In this regard, the luminescent centers are physically separated through a spatial isolation strategy, getting rid of adverse energy transfer processes. The dual-modal luminescence of Ln3+ and Cr3+ can be thus attained simultaneously. Also, optical thermometry based on the fluorescence intensity ratio (FIR) of Ln3+/Cr3+ is performed. Under irradiation upon 377 nm, the FIR value for Tb3+: 5D4→7F5 and Cr3+: 2E→4A2 transitions varies acutely, with a maximal relative sensitivity of 0.80%·K–1 at 570 K. The FIR-based optical thermometry for Dy3+: 4F9/2→6H13/2 and Cr3+: 2E→4A2 transitions is carried out, with a maximal relative sensitivity of 0.86%·K–1 at 573 K. As a consequence, the dual-phases GCs can be an ideal medium for the spatial isolation of luminescent centers, suppressing an adverse energy transfer process and realizing an efficient dual-mode luminescence. This is beneficial to the application of FIR-based optical thermometry for GC materials.}
}