Organic-inorganic hybrid perovskite scintillator for high-resolution X-ray imaging

Herein, Lithium-doped 2D (PEA)2PbBr4 ((PEA)2PbBr4:Li) perovskite single crystals (SCs) synthesized at room temperature are reported, and their scintillation properties are analyzed and compared with those of LYSO:Ce crystals under X-ray excitation. The (PEA)2PbBr4:Li SCs exhibit a fast time response with two decay times (11 ns (85 %) and 38 ns (15 %)), and the main fast-decay time is significantly shorter than that of LYSO:Ce (42 ns). The (PEA)2PbBr4:Li SCs exhibit a bright blue emission peaking at 428 nm and a narrow radioluminescence spectrum. Further, the (PEA)2PbBr4:Li SCs exhibit a high light yield (approximately 23 300 photons/MeV). In addition, the (PEA)2PbBr4:Li SCs exhibit better spatial resolution (3.3 lp/mm at modulation transfer function = 0.1) in X-ray imaging. The results demonstrate that the low-cost (PEA)2PbBr4:Li SCs own the scintillation performance of fastdecay time, high light yield, and high spatial resolution simultaneously, leading to this material an enormous potential for medical diagnostic applications.

Automated summary

This article reports on the scintillation performance of Lithium-doped 2D (PEA)2PbBr4 perovskite single crystals synthesized at room temperature. The crystals exhibit fast decay time, high light yield, and high spatial resolution, making them highly promising for medical diagnostic applications.