Metal Halide Perovskites for Direct X‐Ray Detection in Medical Imaging: To Higher Performance

Fan, Jinyang; Li, Wei; Zhou, Quan; Yang, Guo; Tang, Pengfei; He, Junhai; Ma, Lin; Zhang, Jianfei; Xiao, Jiawen; Yan, Zhengguang; Li, Ang; Han, Xiaodong

doi:10.1002/adfm.202401017

Adv Funct Materials

2024

DOI: 10.1002/adfm.202401017

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Metal Halide Perovskites for Direct X‐Ray Detection in Medical Imaging: To Higher Performance

Jinyang Fan,

Wei Li,

Quan Zhou

et al.

Abstract: This review discusses the utilization of metal halide perovskite (MHP) materials in X‐ray direct imaging detectors for medical application. Compared to traditional semiconductors, MHP has multiple advantages including high linear attenuation coefficient, low exciton binding energy, long carrier diffusion length, and high carrier mobility. These ascendancies allow for low‐dose and high‐resolution medical imaging. Apartment from a historical overview of the develop‐X‐ray direct imaging detectors and their perfor… Show more

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Cited by 3 publications

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Crystalline Orientation Control Enhanced Adhesion of Perovskite to Large‐Area Readout Board for High‐Performance X‐Ray Imaging

Qian,

Huang,

Tang

et al. 2024

Adv Funct Materials

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Halide perovskites are reputed as highly promising photoelectronic materials for direct X‐ray detectors, but realizing large‐area flat‐panel imaging requires to address the compatibility issue of the electronic, surficial, and mechanical properties between the perovskite and the readout circuit board. Here, a low‐dimensional MA3Bi2I9 perovskite is chosen to achieve a good match in a balancing act between the two by exploiting an orientation control strategy for perovskite film growth. The most striking consequence of the orientation controlled growth is the excellent adhesion of the thick perovskite film to the electronic board in large area and effectively addresses the charge sharing effect, which has been notoriously difficult to achieve. The resulting detector, exhibits an X‐ray imaging area of 2.8 × 3.2 cm, with a spatial resolution of 4.0 lp mm⁻¹, the highest yet achieved for polycrystalline perovskite detectors based on TFT backplanes, and a sensitivity of 588 µCGyair−1 cm−2 while maintaining a dark current below 10 nA cm⁻2, this is also the highest value recorded to date for polycrystalline zero‐dimensional perovskite detectors. This device clearly revealing the intricate internal structures of both biological specimens and industrial products. This outcome demonstrates the potential of zero‐dimensional perovskites in X‐ray planar imaging and highlights the critical role of orientation control strategies.

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Crystalline Orientation Control Enhanced Adhesion of Perovskite to Large‐Area Readout Board for High‐Performance X‐Ray Imaging

Qian,

Huang,

Tang

et al. 2024

Adv Funct Materials

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Large‐Area Metal–Organic Framework Glasses for Efficient X‐Ray Detection

Zhu,

He,

Song

et al. 2024

Advanced Materials

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Cutting‐edge techniques utilizing continuous films made from pure, novel semiconductive materials offer promising pathways to achieve high performance and cost‐effectiveness for X‐ray detection. Semiconductive metal–organic framework (MOF) glass films are known for their remarkably smooth surface morphology, straightforward synthesis, and capability for large‐area fabrication, presenting a new direction for high‐performance X‐ray detectors. Here, a novel material centered on MOF glasses for highly uniform glass film fabrication customized for X‐ray detection is introduced. MOF glasses, composed of zinc and imidazole derivatives, enable the transition from solid to liquid at low temperatures, facilitating the straightforward preparation of large‐area and continuous MOF films with high mobility for X‐ray device fabrication. Remarkably, MOF glass detectors demonstrate an exceptional sensitivity of 112.8 µC Gyair−1 cm−2 and a detection limit of 0.41 µGyair s−1, making them one of the most sensitive and with the best detection limits reported to date for MOF X‐ray detectors. Clear X‐ray images are successfully conducted using these developed MOF glass detectors for the first time. This breakthrough in X‐ray sensitivity, and detection limit along with the spatial imaging resolution establishes a new standard for developing large‐area and efficient MOF‐based X‐ray detectors with practical applications in medical and security screening.

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Unveiling the Monoclinic Phase in CsPbBr_3–xCl_x Perovskite Crystals, Phase Transition Suppression and High Energy Resolution γ-Ray Detection

Balvanz,

Bayikadi,

Liu

et al. 2024

J. Am. Chem. Soc.

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All-inorganic CsPbBr 3 and CsPbCl 3 perovskites are promising materials for high-performance solar cells and advanced radiation detection technologies with high stability. Here we report that CsPbBr 3−x Cl x (x = 0−3) crystals exhibit eutectoid behavior for the melting points and phase transition temperatures. The wellknown halide perovskite cubic phase transition temperature shifts near room temperature (∼37 °C for CsPbBr 2 Cl). We conducted an extensive crystallographic analysis on single crystals of 7 different compositions, including the end members CsPbBr 3 and CsPbCl 3 . Contrary to previous beliefs, we discovered they exhibit a monoclinic structure with space group symmetry P2 1 /m at room temperature, rather than the orthorhombic Pnma. This new structural model is more precise and features a unit cell volume that is four times larger than that of the orthorhombic model. From high-quality single crystals of CsPbBr 2 Cl, grown by the Bridgman method, we constructed γ-ray detectors achieving an energy resolution of 7.2% at 200 V for 57 Co radiation. Thermally stimulated current spectroscopy of the CsPbBr 2 Cl samples revealed that the defect densities in crystals from different regions of the ingot were relatively uniform, with values of ∼4.72 × 10 12 and ∼5.09 × 10 12 cm −3 . These findings indicate that low deep-level defect densities can be achieved that are consistent with the notable performance of the CsPbBr 2 Cl perovskite as a high-energy γ radiation detector.

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Metal Halide Perovskites for Direct X‐Ray Detection in Medical Imaging: To Higher Performance

Cited by 3 publications

References 201 publications

Crystalline Orientation Control Enhanced Adhesion of Perovskite to Large‐Area Readout Board for High‐Performance X‐Ray Imaging

Crystalline Orientation Control Enhanced Adhesion of Perovskite to Large‐Area Readout Board for High‐Performance X‐Ray Imaging

Large‐Area Metal–Organic Framework Glasses for Efficient X‐Ray Detection

Unveiling the Monoclinic Phase in CsPbBr_3–xCl_x Perovskite Crystals, Phase Transition Suppression and High Energy Resolution γ-Ray Detection

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Metal Halide Perovskites for Direct X‐Ray Detection in Medical Imaging: To Higher Performance

Cited by 3 publications

References 201 publications

Crystalline Orientation Control Enhanced Adhesion of Perovskite to Large‐Area Readout Board for High‐Performance X‐Ray Imaging

Crystalline Orientation Control Enhanced Adhesion of Perovskite to Large‐Area Readout Board for High‐Performance X‐Ray Imaging

Large‐Area Metal–Organic Framework Glasses for Efficient X‐Ray Detection

Unveiling the Monoclinic Phase in CsPbBr3–xClx Perovskite Crystals, Phase Transition Suppression and High Energy Resolution γ-Ray Detection

Contact Info

Product

Resources

About

Unveiling the Monoclinic Phase in CsPbBr_3–xCl_x Perovskite Crystals, Phase Transition Suppression and High Energy Resolution γ-Ray Detection