X-Ray imager of 26-µm resolution achieved by perovskite assembly

Wang, Zhaofen; Sun, Ruijia; Liu, Nianqiao; Fan, Huailin; Hu, Xun; Shen, Depeng; Zhang, Yuhai; Liu, Hong

doi:10.1007/s12274-021-3808-y

Cited by 32 publications

(30 citation statements)

References 44 publications

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“…These confirmed that our flexible films have huge potential for non-flat, flexible target X-ray detection. Finally, the excellent resolution ability of the films was demonstrated using a copper grid with honeycomb structure as an imaging object (Figure g) . An excellent X-ray spatial resolution of 17 lp/mm was achieved with a modulation transfer function (MTF) value of 20%, representing the highest imaging resolution for powder-based screens (Figure h, Table S1).…”

mentioning

confidence: 94%

Large-Area Perovskite-Related Copper Halide Film for High-Resolution Flexible X-ray Imaging Scintillation Screens

et al. 2022

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Flexible copper halide films of 400 cm2 area were fabricated with outstanding mechanical stability, excellent film uniformity, nearly 100% photoluminescence quantum yields, and resistance to water and heat. The re-absorption-free X-ray imaging scintillators engineered based on these films exhibit superior scintillation performance with a detection limit as low as 48.6 nGy/s and 17 lp/mm X-ray imaging resolution, representing the highest imaging resolution for powder-based screens.

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confidence: 94%

Large-Area Perovskite-Related Copper Halide Film for High-Resolution Flexible X-ray Imaging Scintillation Screens

et al. 2022

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“… 10 Wang et al used a CsPbBr 3 nanosheet film with a thickness of 15 μm as the X-ray scintillator and achieved 26-μm resolution. 19 Because this film thickness was almost the same as our nanowire length, the higher spatial resolution in our results indicated that the columnar nanowire structure was indeed beneficial for the spatial resolution.…”

Section: Resultsmentioning

confidence: 71%

“…Using the CsPbBr 3 NW/AAO scintillator, X-ray images are able to distinguish line pairs with a spacing of 2 μm, which is significantly better than the tens of micrometers reported previously for MHP nanocrystal film scintillator screens. 12 , 13 , 19 , 21 The scintillators show an increasing photon yield for decreasing nanowire diameters, with ∼5300 ph/MeV for the smallest 30 nm diameter. Due to the physical confinement of the AAO membrane, our scintillators exhibit significantly improved radiation resistance and air stability.…”

Section: Introductionmentioning

confidence: 99%

Single-Crystalline Perovskite Nanowire Arrays for Stable X-ray Scintillators with Micrometer Spatial Resolution

Zhang

Dierks

Lamers

et al. 2021

ACS Appl. Nano Mater.

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X-ray scintillation detectors based on metal halide perovskites have shown excellent light yield, but they mostly target applications with spatial resolution at the tens of micrometers level. Here, we use a one-step solution method to grow arrays of 15-μm-long single-crystalline CsPbBr 3 nanowires (NWs) in an AAO (anodized aluminum oxide) membrane template, with nanowire diameters ranging from 30 to 360 nm. The CsPbBr 3 nanowires in AAO (CsPbBr 3 NW/AAO) show increasing X-ray scintillation efficiency with decreasing nanowire diameter, with a maximum photon yield of ∼5 300 ph/MeV at 30 nm diameter. The CsPbBr 3 NW/AAO composites also display high radiation resistance, with a scintillation-intensity decrease of only ∼20–30% after 24 h of X-ray exposure (integrated dose 162 Gy air ) and almost no change after ambient storage for 2 months. X-ray images can distinguish line pairs with a spacing of 2 μm for all nanowire diameters, while slanted edge measurements show a spatial resolution of ∼160 lp/mm at modulation transfer function (MTF) = 0.1. The combination of high spatial resolution, radiation stability, and easy fabrication makes these CsPbBr 3 NW/AAO scintillators a promising candidate for high-resolution X-ray imaging applications.

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“…For example, many perovskite NCs‐based scintillators screen have been developed and show the potential for X‐ray imaging with the advantage of low‐cost, easy for preparation, and high detection sensitivity. [ 12 , 19 , 22 , 24 , 30 , 44 ] However, many scintillator films preparation methods [ 23 , 31 , 45 , 46 , 47 , 48 ] require the addition of auxiliary film‐forming geopolymers, which causes the low equivalent density of scintillator material in the film and thus results in the low RL intensity. To ensure the enough light output, the thick film is required but is usually opaque, which greatly increase the light scattering and seriously reduce the imaging resolution.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin, Transparent, and High Density Perovskite Scintillator Film for High Resolution X‐Ray Microscopic Imaging

Guo

Zhu

et al. 2022

Advanced Science

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Inorganic perovskite quantum dots CsPbX3 (X = Cl, Br, and I) has recently received extensive attention as a new promising class of X‐ray scintillators. However, relatively low light yield (LY) of CsPbX3 and strong optical scattering of the thick opaque scintillator film restrict their practical applications for high‐resolution X‐ray microscopic imaging. Here, the Ce3+ ion doped CsPbBr3 nanocrystals (NCs) with enhanced LY and stability are obtained and then the ultrathin (30 µm) and transparent scintillator films with high density are prepared by a suction filtration method. The small amount Ce3+ dopant greatly enhances the LY of CsPbBr3 NCs (about 33 000 photons per MeV), which is much higher than that of bare CsPbBr3 NCs. Moreover, the scintillator films made by these NCs with high density realize a high spatial resolution of 862 nm thanks to its thin and transparent feature, which is so far a record resolution for perovskite scintillator‐based X‐ray microscopic imaging. This strategy not only provides a simple way to increase the resolution down to nanoscale but also extends the application of as‐prepared CsPbBr3 scintillator for high resolution X‐ray microscopic imaging.

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X-Ray imager of 26-µm resolution achieved by perovskite assembly

Cited by 32 publications

References 44 publications

Large-Area Perovskite-Related Copper Halide Film for High-Resolution Flexible X-ray Imaging Scintillation Screens

Large-Area Perovskite-Related Copper Halide Film for High-Resolution Flexible X-ray Imaging Scintillation Screens

Single-Crystalline Perovskite Nanowire Arrays for Stable X-ray Scintillators with Micrometer Spatial Resolution

Ultrathin, Transparent, and High Density Perovskite Scintillator Film for High Resolution X‐Ray Microscopic Imaging

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