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

Zhou, Yang; Wang, Xiaojia; He, Tengyue; Yang, Haoze; Yang, Chen; Shao, Bingyao; Gutiérrez‐Arzaluz, Luis; Bakr, Osman M.; Zhang, Yuhai; Mohammed, Omar F.

doi:10.1021/acsenergylett.2c00075

Cited by 103 publications

(119 citation statements)

References 15 publications

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“…Simple, large-scale production and excellent optical properties make polycrystalline C-CAI powders highly promising as X-ray scintillation material. A facile spin-coating method was employed to fabricate homogeneous and thickness-controlled flexible films using our previously reported method . First, fresh 5% doped C-CAI powders with the highest PLQY were ground in a mortar under a nitrogen atmosphere to obtain uniform, nanometer-sized crystals (Figure S12).…”

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confidence: 96%

“…Recently, a series of low-dimensional metal halides have exhibited potential as feasible and promising scintillation materials by virtue of their high atomic weight, near-unity photoluminescence quantum yield (PLQY), and negligible reabsorption owing to the presence of self-trapped excitons (STEs). − For instance, Tang and co-workers reported a copper-based scintillator containing rubidium that exhibited a record high light yield (∼91 000 photons/MeV) . However, the high natural radioactivity of rubidium could greatly limit its potential for practical application.…”

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confidence: 99%

“…The light yield of the LYSO:Ce scintillator was calculated to be 33 500 photons/MeV, which is close to its reported value (∼33 200 photons/MeV) (Figure S16). This cross-check confirms the accuracy of our measurements. We then compared the light yield of the C-CAI@P-60% film with that of several advanced metal halide and perovskite scintillators recently reported.…”

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confidence: 99%

“…A facile spin-coating method was employed to fabricate homogeneous and thickness-controlled flexible films using our previously reported method. 23 First, fresh 5% doped C-CAI powders with the highest PLQY were ground in a mortar under a nitrogen atmosphere to obtain uniform, nanometer-sized crystals (Figure S12). After embedding the C-CAI powders in pure PDMS, the slurry was dropped and spin-coated on a glass substrate.…”

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confidence: 99%

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High-Performance Copper-Doped Perovskite-Related Silver Halide X-ray Imaging Scintillator

Zhou

Wang

et al. 2022

ACS Energy Lett.

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Scintillators are critical for high-energy radiation detection across a wide array of potential applications, from medical radiography and safety inspections all the way to space exploration. However, constrained by their current shortcomings, including high-temperature and complex fabrication as well as inherent brittleness and fragility among thick films and bulk crystals, traditional scintillators are finding it difficult to meet the rising demand for cost-effective, ecofriendly, and flexible X-ray detection. Here, we describe the development of high-performance and flexible X-ray scintillators based on films of Cu-doped Cs2AgI3 that exhibit ultrahigh X-ray sensitivity. The materials exhibit a high scintillation light yield of up to 82 900 photons/MeV and a low detection limit of 77.8 nGy/s, which is approximately 70 times lower than the dosage for a standard medical examination. Moreover, richly detailed X-ray images of biological tissue and electronic components with a high spatial resolution of 16.2 lp/mm were obtained using flexible, large-area, solution-processed scintillation screens.

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confidence: 96%

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confidence: 99%

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confidence: 99%

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High-Performance Copper-Doped Perovskite-Related Silver Halide X-ray Imaging Scintillator

Zhou

Wang

et al. 2022

ACS Energy Lett.

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“…X‐ray has been employed in probing internal information non‐destructively, enabling broad applications in the medical radiography and electronic industries. [ 1–4 ] More recently, metal halides perovskite scintillators have attracted much attention due to their facile solution processability and ultrasensitive X‐ray detection, which allows large area and flexible X‐ray imaging, such as CsPbBr 3 , [ 1 ] Cs 3 Cu 2 I 5 , [ 5–7 ] Cs 2 Ag 0.6 Na 0.4 In 0.85 Bi 0.15 C l6 , [ 2 ] etc. Although significant progress in metal halide perovskite as scintillators has been made in X‐ray detection, its fragile structure leads to a certain gap for practical application.…”

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confidence: 99%

High‐Resolution X‐Ray Time‐Lapse Imaging from Fluoride Nanocrystals Embedded in Glass Matrix

Tang

Liu

Fang

et al. 2022

Advanced Optical Materials

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A latent image of the target after the X‐ray irradiation induced via a 980 nm laser or thermal excitation provides great potentials for healthcare diagnostics and nondestructive inspection. Taking the advantage of X‐ray time‐lapse imaging, simplified facilities and visualized information can be achieved. However, information acquisition with higher resolution, combined with long‐term storage for the corresponding X‐ray images remains a challenge. Herein, Tb3+‐doped Ba2LaF7 nanocrystals (NCs) grown in situ and dispersed uniformly in an amorphous glass matrix is explored, which performs a fascinating X‐ray response for imaging with an impressive spatial resolution reaching 20.0 lp mm−1. Moreover, the as‐developed corresponding scintillators exhibit excellent optical storage capability upon X‐ray irradiation for the constructed deep traps, and a controllable release of the captured carriers induced by thermal disturbance, and 980 nm laser stimulation can be achieved. Notably, the imaging resolution is well preserved to be 20.0 lp mm−1 even recorded after 10 days. The as‐explored Ba2LaF7:Tb3+ NCs embedded within an amorphous matrix realize a feasible approach for a simplified X‐ray imaging system with high‐resolution information production.

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Scintillator of Polycrystalline Perovskites for High‐Sensitivity Detection of Charged‐Particle Radiations

Hunyadi

Samu

Csige

et al. 2022

Adv Funct Materials

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Herein, the first study on the scintillation properties of CsCu 2 X 3 and Cs 3 Cu 2 X 5 (where X: Cl − , Br − , I − ) is presented, describing their charged particle-induced luminescence involving electrons, protons, α-particles, and heavy ions, as well as revealing their capabilities on the timing and spectroscopic evaluation of single-particle events. The thin layers are prepared with a simple and costeffective deposition procedure, without the incorporation of external dopants, exploiting the intrinsic radiative recombination observed in low-dimensional perovskites. The combined effect of the high binding energy and localized stability of self-trapped excitons, large Stokes shift, defect tolerance, and the high excitation density along the particle track leads to the emergence of boosted scintillation pulses. The observations demonstrate the first use of inorganic thin-film scintillators with optical pulse characteristics and light yield competitive with doped single crystal scintillators, while also providing improved structural and functional stability under extreme environmental conditions.

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

Cited by 103 publications

References 15 publications

High-Performance Copper-Doped Perovskite-Related Silver Halide X-ray Imaging Scintillator

High-Performance Copper-Doped Perovskite-Related Silver Halide X-ray Imaging Scintillator

High‐Resolution X‐Ray Time‐Lapse Imaging from Fluoride Nanocrystals Embedded in Glass Matrix

Scintillator of Polycrystalline Perovskites for High‐Sensitivity Detection of Charged‐Particle Radiations

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