3D X-ray microscopy with a CsPbBr3 nanowire scintillator

Dierks, Hanna; Zhang, Zhaojun; Lamers, Nils; Wallentin, Jesper

doi:10.1007/s12274-022-4633-7

Cited by 15 publications

(19 citation statements)

References 44 publications

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“…Inorganic metal halide perovskites have emerged to be viable materials for high-contrast X-ray detection due to the large X-ray attenuation coefficient, high carrier mobility, long carrier lifetime, low trap density, and excellent material stability [8][9][10][11][12][13]. Perovskite single crystals can be prepared in solutions with sufficient thickness and high carrier mobility-lifetime [14,15].…”

Section: Introductionmentioning

confidence: 99%

CsPbBr3-DMSO merged perovskite micro-bricks for efficient X-ray detection

et al. 2023

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Inorganic perovskite wafers with good stability and adjustable sizes are promising in X-ray detection but the high synthetic temperature is a hindrance. Herein, dimethyl sulfoxide (DMSO) is used to prepare the CsPbBr 3 micro-bricks powder at room temperature. The CsPbBr 3 powder has a cubic shape with few crystal defects, small charge trap density, and high crystallinity. A trace amount of DMSO attaches to the surface of the CsPbBr 3 micro-bricks via Pb-O bonding, forming the CsPbBr 3 -DMSO adduct. During hot isostatic processing, the released DMSO vapor merges the CsPbBr 3 micro-bricks, producing a compact and dense CsPbBr 3 wafer with minimized grain boundaries and excellent charge transport properties. The CsPbBr 3 wafer shows a large mobility-lifetime (μτ) product of 5.16 × 10 − 4 cm 2 ·V − 1 , high sensitivity of 14,430 μC·Gy air −1 ·cm −2 , low detection limit of 564 nGy air ·s −1 , as well as robust stability in X-ray detection. The results reveal a novel strategy with immense practical potential pertaining to high-contrast X-ray detection. Electronic Supplementary Material Supplementary material (further details of the characterization, SEM images, AFM images, KPFM images, schematic illustration, XRD patterns, XPS spectra, FTIR spectra, UPS spectra, and stability tests) is available in the online version of this article at 10.1007/s12274-023-5487-3.

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Section: Introductionmentioning

confidence: 99%

CsPbBr3-DMSO merged perovskite micro-bricks for efficient X-ray detection

et al. 2023

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“…Therefore, it has been difficult to acquire a full, high-resolution tomogram with a perovskite scintillator without noticeable degradation during the measurement time. This has been achieved now with our setup and scintillator [9].…”

Section: Tomography With New Scintillatormentioning

confidence: 69%

“…As an example for the feasibility of such tests, we studied a scintillator composed of CsPbBr 3 metal halide perovskite nanowires grown in an anodized aluminum oxide (AAO) membrane [9,55]. One of the main challenges for perovskite materials is the low stability and sensitivity to humidity, temperature, and radiation damage, which up to now keeps them from being used in commercial systems [20,49].…”

Section: Tomography With New Scintillatormentioning

confidence: 99%

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A versatile laboratory setup for high resolution X-ray phase contrast tomography and scintillator characterization

Dierks

Stjärneblad

Wallentin

2023

XST

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BACKGROUND: X-ray micro-tomography (μCT) is a powerful non-destructive 3D imaging method applied in many scientific fields. In combination with propagation-based phase-contrast, the method is suitable for samples with low absorption contrast. Phase contrast tomography has become available in the lab with the ongoing development of micro-focused tube sources, but it requires sensitive and high-resolution X-ray detectors. The development of novel scintillation detectors, particularly for microscopy, requires more flexibility than available in commercial tomography systems. OBJECTIVE: We aim to develop a compact, flexible, and versatile μCT laboratory setup that combines absorption and phase contrast imaging as well as the option to use it for scintillator characterization. Here, we present details on the design and implementation of the setup. METHODS: We used the setup for μCT in absorption and propagation-based phase contrast mode, as well as to study a perovskite scintillator. RESULTS: We show the 2D and 3D performance in absorption and phase contrast mode, as well as how the setup can be used for testing new scintillator materials in a realistic imaging environment. A spatial resolution of around 1.3μm is measured in 2D and 3D. CONCLUSIONS: The setup meets the needs for common absorption μCT applications and offers the increased contrast in the phase contrast mode. The availability of a versatile laboratory μCT setup allows not only for easy access to tomographic measurements, but also enables a prompt monitoring and feedback beneficiary for advances in scintillator fabrication.

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“…Confinement of NCs and photons in vertical holes reduces the optical cross-talk efficiently, and the imaging resolution can be as high as the size of the holes, theoretically. Similarly, Dierks and co-workers also reported this strategy and demonstrated a fascinating high-resolution 3D X-ray microscopy . However, when inserting Cs 3 Cu 2 I 5 into AAO arrays, a relatively low imaging resolution was obtained …”

Section: Imaging Resolution Really High?mentioning

confidence: 91%

Are Inorganic Lead Halide Perovskite Nanocrystals Promising Scintillators?

et al. 2023

ACS Energy Lett.

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Inspections based on ionizing radiation have spread into various areas including our daily lives, industries, and scientific investigations and now face increasing demands with the development of society. Commercial X-ray detectors are mostly based on an indirect operation model in which the scintillator transforms X-ray photons into visible light and bottom photodiodes convert them into images. Obviously, the performance of the scintillator determines the final imaging properties, and the pursuit of scintillators with superior properties and lower cost is ongoing. Recently, inorganic lead halide perovskite nanocrystals (PNCs) emerged as promising scintillators for X-ray imaging. Here, we make a detailed conclusion of the superiority of PNC scintillators and take a new look at their scintillation performances. Discrepancies are discussed and some suggestions are proposed. Finally, perspectives on future developments, advice to the field, and proposed solutions to the problems toward full device performance and practical applications are provided.

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3D X-ray microscopy with a CsPbBr3 nanowire scintillator

Cited by 15 publications

References 44 publications

CsPbBr3-DMSO merged perovskite micro-bricks for efficient X-ray detection

CsPbBr3-DMSO merged perovskite micro-bricks for efficient X-ray detection

A versatile laboratory setup for high resolution X-ray phase contrast tomography and scintillator characterization

Are Inorganic Lead Halide Perovskite Nanocrystals Promising Scintillators?

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