Leveraging structural rigidity for thermal robust scintillation in rare-earth halide perovskites

作者：Zhi Yang, Jiangtao Cui, Linyuan Gu, Rui Gao, Ting Wang, Jizhong Song · 发表于：Advanced Powder Materials · 年份：2025 · DOI：10.1016/j.apmate.2025.100371 · 被引用次数：6 · 研究领域：Perovskite Materials and Applications、Luminescence Properties of Advanced Materials、Radiation Detection and Scintillator Technologies

High-temperature scintillators are critical components for X-ray imaging technique used in extreme environments such as oil well-logging, nuclear reactors and industrial inspections. Cu and Mn-based perovskites have high brightness but suffer from severe thermal quenching. In contrast, rare-earth based perovskites are candidates of high-temperature scintillators. However, their development is hindered by the absence of studying the relationship between structural rigidity and property. Herein, we find that rare-earth-doped 3D Cs 2 NaLuCl 6 and 0D Cs 3 LuCl 6 perovskites have thermally-stable emission resulting from their high Debye temperature exceeding 200 K and thermally-stable energy transfer efficiency. We also observe that Tb 3+ -green emission and Ce 3+ /Sm 3+ -red emission have brighter X-ray images than Ce 3+ -UV emission due to their camera-matched spectral emissions. The 3D perovskite has low structural rigidity and strong electron−phonon coupling, and the scintillator achieves a high emission intensity and slight thermal quenching. In contrast, the 0D perovskite has higher structural rigidity and weaker electron−phonon coupling, and the scintillator exhibits a lower emission intensity and pronounced anti-thermal-quenching. The findings provide insights into bolstering the structural rigidity of Lu-halide perovskites in achieving thermally-stable luminescence for high-temperature scintillators, and prompting efforts to utilize the emission color of scintillators. Th...