Tellurium-Doped 0D Organic–Inorganic Hybrid Lead-Free Perovskite for X‑ray Imaging

• Published in: Inorganic chemistry 2023-11, Vol.62 (46), p.19006-19014
• Main Authors: Wang, Zixian, Wu, Daofu, Huang, Qiang, Guo, Linfeng, Wang, Yijia, Chen, Weiwei, Wang, Fei, Du, Juan, Liu, Zhengzheng, Hu, Zhiping, Leng, Yuxin, Lai, Jun’an, He, Peng, Tang, Xiaosheng
• Format: Article
• Language: English
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/acs.inorgchem.3c02643

The application of X-ray imaging in military, industrial flaw detection, and medical examination is inseparable from the wide application of scintillator materials. In order to substitute for lead, lower costs, and reduce self-absorption, organic–inorganic hybrid lead-free perovskite scintillators are emerging as a new option. In this work, novel (TEA)2Zr1–x Te x Cl6 perovskite microcrystals (MCs) were successfully synthesized by a hydrothermal method, with Te4+ doping, which leads to yellow triplet-state self-trapped excitons emission. The emission peak of (TEA)2Zr1–x Te x Cl6 located at 605 nm under X-ray excitation, which was applied to X-ray imaging, shows a clear wiring structure inside the USB connector. The detection limit (DL) of 820 nGyair/s for (TEA)2Zr0.9Te0.1Cl6 is well below the dose rate corresponding to a standard medical X-ray diagnosis is 5.5 μGyair/s. This work opens up a new path for organic–inorganic hybrid lead-free scintillators.