Abstract
With super strong penetrability, high-energy X-rays can be applied to probe the inner structure of target objects under nondestructive situations. Scintillation materials can down-convert X-rays into visible light, enabling the reception of photon signals and photoelectric conversion by common sensing arrays such as photomultiplier tubes and amorphous-Si photodiode matrixes. All-inorganic perovskite nanocrystals are emerging photovoltaic and scintillation materials, with tremendous light-conversion efficiency and tunable luminous properties, exhibiting great potential for high-quality X-ray imaging. Recent advancements in nanotechnology further accelerate the performance improvement of scintillation materials. In this review, we will provide a comprehensive overview of novel all-inorganic perovskite nano-scintillators in terms of potential applications in low-dose X-ray medical radiography. Compared with conventional scintillators, the merits/drawbacks, challenges, and scintillation performance control will be the focus of this article.
Highlights
High-energy X-rays can be applied to probe the inner structure of target objects under nondestructive situations
We will provide a comprehensive overview of novel all-inorganic perovskite nano-scintillators in terms of potential applications in low-dose X-ray medical radiography
X-ray is a kind of high energy electromagnetic radiation with ultra-strong penetrability, which can probe the inner situations under nondestructive testing.[1]
Summary
X-ray is a kind of high energy electromagnetic radiation with ultra-strong penetrability, which can probe the inner situations under nondestructive testing.[1]. Conventional scintillators like NaI:Tl+,11,12 CsI:Tl+, CdWO4 (CWO),[13,14] Bi4Ge3O12 (BGO),[11,12] Lu2SiO5 (LSO), and Lu2(1ÀX)Y2XSiO5 (LYSO) have been commercially applied in medical imaging devices due to their high light output and strong stopping power. These materials still require further optimization to simplify the manufacturing processes, avoid the a erglow and achieve tunable scintillation by nding new electron-transition energy levels.[15–17]. For realizing high contrast X-ray imaging, the exploration of Pb-free halide perovskite nano-scintillators with fast decay time and matched emission wavelength has been a recent research hotspot. This review will provide insightful ideas for future scintillation material design and optimizations
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