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

Abstract

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) 2 Zr 1– x Te x Cl 6 perovskite microcrystals (MCs) were successfully synthesized by a hydrothermal method, with Te 4+ doping, which leads to yellow triplet-state self-trapped excitons emission. The emission peak of (TEA) 2 Zr 1– x Te x Cl 6 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 n Gy air /s for (TEA) 2 Zr 0.9 Te 0.1 Cl 6 is well below the dose rate corresponding to a standard medical X-ray diagnosis is 5.5 μGy air /s. This work opens up a new path for organic–inorganic hybrid lead-free scintillators.