@article{Dong2025, 
author = {Guangzhi Dong and Huanhuan Su and Rulang Bai and Xiaorong Yang and Xiaobo Li and Rusen Yang and Liping Feng and Xiaowang Liu and Tao Wang and Wanqi Jie},
title = {Photoluminescence and optical temperature sensing properties of Gd3Al3Ga2O12:Pr3+ garnet transparent ceramics},
year = {2025},
journal = {Journal of Advanced Ceramics},
volume = {14},
number = {9},
pages = {9221141},
keywords = {photoluminescence, transparent ceramics, Pr3+, optical temperature sensing, Gd3Al3Ga2O12 (GAGG)},
url = {https://www.sciopen.com/article/10.26599/JAC.2025.9221141},
doi = {10.26599/JAC.2025.9221141},
abstract = {Optical temperature sensors have garnered significant attention because of their ability to provide accurate, noncontact temperature measurements. Rare-earth element-doped Gd3Al3Ga2O12 (GAGG) ceramics are known for their excellent optical properties, stable crystal structure, good thermal stability, and tunable fluorescence characteristics. In this study, we innovatively introduced a series of Pr3+-doped GAGG garnet ceramics with high sensitivity for optical temperature sensing. The phase structure, morphology, and optical properties of the ceramics were investigated, and the optimal doping concentration was determined. The photoluminescence (PL) and optical temperature sensing properties of the GAGG:Pr3+ ceramics were thoroughly examined. The PL spectra of the GAGG:Pr3+ garnet transparent ceramics displayed multiple narrow emission peaks, and CIE plots indicated that the luminescence color was tunable within the green region. The emission intensities exhibited a quenching phenomenon at high rare-earth element doping concentrations and elevated temperatures. The optical temperature sensing properties of GAGG:Pr3+ were analyzed via the fluorescence intensity ratio (FIR) method, which is based on Pr3+ thermally coupled (3P1 → 3H5 and 3P0 → 3H4) and nonthermally coupled (3P1 → 3H5 and 1D2 → 3H4) energy level pairs. The maximum relative sensitivities for the thermally coupled and nonthermally coupled energy level pairs of GAGG:Pr3+ reached 0.81% K−1 (at 300 K) and 0.37% K−1 (at 350 K), respectively, under 450 nm blue light excitation. These results suggest that GAGG:Pr3+ ceramics have significant potential for noncontact optical temperature sensing applications.}
}