@article{Hu2025, 
author = {Chen Hu and Danyang Zhu and Yanbin Wang and Zhenzhen Zhou and Junhao Ye and Romana Kucerkova and Alena Beitlerova and Martin Nikl and Jiang Li},
title = {Defect engineering in Mg2+ co-doped LuAG:Ce ceramics: Towards ultrahigh fast scintillation proportion},
year = {2025},
journal = {Journal of Advanced Ceramics},
volume = {14},
number = {9},
pages = {9221148},
keywords = {first-principles calculations, scintillators, thermoluminescence, fast-total ratio, LuAG:Ce, Mg ceramics},
url = {https://www.sciopen.com/article/10.26599/JAC.2025.9221148},
doi = {10.26599/JAC.2025.9221148},
abstract = {A slow scintillation component due to charge carrier capture at point defects is a serious issue in scintillator materials. Therefore, the fabrication of scintillators with a high proportion of fast components in the scintillation response is of great interest to material scientists. By applying the defect engineering strategy in advanced optical Lu3Al5O12:Ce,Mg (LuAG:Ce,Mg) ceramics, an ultrahigh fast scintillation proportion can be achieved with a slight loss of fast scintillation light. Moreover, low-temperature thermoluminescence (TSL) investigations revealed that the intensities of all the TSL peaks decreased in the Mg2+-codoped samples. The slight loss of fast scintillation light observed was explained by density functional theory (DFT) calculations. The effect of {Ce3+–Mg2−} pairs on emission quenching was compared with that of {Ce3+–Ca2−} pairs. As a consequence, the 0.3 at% Mg2+-codoped ceramic sample has an LY0.5µs/LY10µs ratio of 99.8%, which is better than those reported for isostructural ceramics and single crystals. We conclude with a discussion of the role of Mg2+ co-doping and future research directions concerning other oxide scintillators.}
}