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

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.

SUBMITTER: Yang Z 

PROVIDER: S-EPMC11473900 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature