Designer bright and fast CsPbBr3 perovskite nanocrystal scintillators for high-speed X-ray imaging

Zhi Yang (), Jisong Yao, Leimeng Xu, Wenxuan Fan and Jizhong Song ()
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Zhi Yang: Zhengzhou University
Jisong Yao: Zhengzhou University
Leimeng Xu: Zhengzhou University
Wenxuan Fan: Zhengzhou University
Jizhong Song: Zhengzhou University

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Bright and fast scintillators are highly crucial for high-speed X-ray imaging in the medical diagnostic radiology including angiography and cardiac computed tomography. The CsPbBr3 nanocrystal scintillator featuring a nanosecond radioluminescence decay time is a promising candidate. However, it suffers from a substantial photon self-absorption limiting the light output, and being bright and fast simultaneously is difficult. Here we design and in-situ synthesize multi-site ZnS(Ag)-CsPbBr3 heterostructures to modulate the bright and fast features of scintillators. We find external energy from ZnS(Ag) can effectively transfer to CsPbBr3 based on the non-radiative Förster resonance energy transfer, resulting in a light yield of 40,000 photons MeV−1. By combing a radioluminescence decay time of 36 ns and a spatial resolution of 30 lp mm−1, the scintillator enables high-speed X-ray imaging at 200 frames per second. This study showcases the structure design is significant for obtaining bright and fast perovskite scintillators for the real-time X-ray imaging.

Date: 2024
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DOI: 10.1038/s41467-024-53263-9

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