近日，南京邮电大学赵强团队研究了用于实时动态和三维X射线成像的高发光有机-无机杂化卤化锑闪烁体。相关论文发表在2026年1月26日出版的《光：科学与应用》杂志上。

实时动态与三维（3D）X射线成像是目前最具挑战性的X射线成像技术，对闪烁体性能提出了更严格的要求。具有高X射线吸收系数的铅基（Pb²⁺）有机-无机杂化卤化物（OIHH）闪烁体已被证实展现出优异的闪烁性能。然而，其毒性和不稳定性阻碍了进一步的发展，因此有必要探索兼具优异闪烁性能和低毒性的新型金属基OIHH材料。与铅基（Pb²⁺）OIHH相比，锑基（Sb³⁺）OIHH不仅环境友好，而且表现出良好的稳定性，这使其成为优异闪烁体的有前景的候选材料。目前，关于锑基OIHH闪烁体在X射线探测与成像应用方面的理解仍处于起步阶段，有待进一步探索。

研究组设计合成了两种锑基OIHH晶体：(BPP)₂SbCl₅（CP1）和(BPP)₂SbCl₅·0.5H₂O（CP2）。除CP2中引入了水分子外，两者具有非常相似的晶体结构。实验和理论结果表明，CP2具有更大的晶格畸变和更小的运动自由度，这有助于促进自陷激子发射。研究组制备了基于CP2晶体的柔性闪烁屏，并成功将其应用于实时动态及3D X射线成像。这是锑基OIHH闪烁体的首次此类应用，显著拓宽了该类材料在闪烁体领域的应用潜力。

附：英文原文

Title: Highly luminescent organic-inorganic hybrid antimony halide scintillators for real-time dynamic and 3D X-ray imaging

Author: Cui, Haixia, Li, Wanjiao, Li, Qianxi, Wang, Shaolong, Zhu, Mingye, Deng, Yongjing, Liu, Shujuan, Zhao, Qiang

Issue&Volume: 2026-01-26

Abstract: Real-time dynamic and three-dimensional (3D) X-ray imaging are the most challenging types of X-ray imaging technology, placing more rigorous standards on scintillators. Lead-based (Pb2+) organic-inorganic hybrid halide (OIHH) scintillators with high X-ray absorption coefficients have been demonstrated to exhibit excellent scintillation performance. However, their toxicity and instability hindered further development, and it is necessary to explore novel low-toxic metal-based OIHHs possessing excellent scintillation performance. Antimony-based (Sb3+) OIHHs are not only environmentally friendly, but also show good stability compared to Pb2+-based OIHHs, which make them promising candidates as excellent scintillators. Currently, the understanding of Sb3+-based OIHH scintillators for X-ray detection and imaging is still in infancy and requires further exploration. Herein, we designed two Sb3+-based OIHH crystals of (BPP)2SbCl5 (CP1) and (BPP)2SbCl5 0.5 H2O (CP2), which have very similar crystal structures except the introduction of water molecules in CP2. Experimental and theoretical results reveal that CP2 has larger lattice distortion and smaller freedom of motion, which can promote the self-trapped excitons emissions. A flexible scintillator screen based on CP2 crystals was prepared and applied for real-time dynamic and 3D X-ray imaging, which is the first time for Sb3+-based OIHH scintillators and significantly broadens the potential of Sb3+-based OIHH scintillators.

DOI: 10.1038/s41377-025-02152-x

Source: https://www.nature.com/articles/s41377-025-02152-x