Synergistic strain engineering of perovskite single crystals for highly stable and sensitive X-ray detectors with low-bias imaging and monitoring

Nature Photonics, Год журнала: 2022, Номер 16(8), С. 575 - 581

Опубликована: Июль 18, 2022

Abstract Although three-dimensional metal halide perovskite (ABX 3 ) single crystals are promising next-generation materials for radiation detection, state-of-the-art X-ray detectors include methylammonium as A-site cations, limiting the operational stability. Previous efforts to improve stability using formamidinium–caesium-alloyed cations usually sacrifice detection performance because of high trap densities. Here we successfully solve this trade-off between and by synergistic composition engineering, where alloys decrease density B-site dopants release microstrain induced alloying. As such, develop high-performance with excellent Our exhibit sensitivity (2.6 ± 0.1) × 10 4 μC Gy air −1 cm −2 under 1 V ultralow limit 7.09 nGy s . In addition, they feature long-term over half a year impressive thermal up 125 °C. We further demonstrate promise our low-bias portable applications high-quality imaging monitoring prototypes.

Язык: Английский

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Advances in the Application of Perovskite Materials

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Июль 10, 2023

Nowadays, the soar of photovoltaic performance perovskite solar cells has set off a fever in study metal halide materials. The excellent optoelectronic properties and defect tolerance feature allow to be employed wide variety applications. This article provides holistic review over current progress future prospects materials representative promising applications, including traditional devices (solar cells, light-emitting diodes, photodetectors, lasers), cutting-edge technologies terms neuromorphic (artificial synapses memristors) pressure-induced emission. highlights fundamentals, remaining challenges for each application, aiming provide comprehensive overview development status navigation research devices.

Язык: Английский

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Recent Development of Halide Perovskite Materials and Devices for Ionizing Radiation Detection

Chemical Reviews, Год журнала: 2023, Номер 123(4), С. 1207 - 1261

Опубликована: Фев. 2, 2023

Ionizing radiation such as X-rays and γ-rays has been extensively studied used in various fields medical imaging, radiographic nondestructive testing, nuclear defense, homeland security, scientific research. Therefore, the detection of high-energy with high-sensitivity low-cost-based materials devices is highly important desirable. Halide perovskites have emerged promising candidates for due to large light absorption coefficient, resistivity, low leakage current, high mobility, simplicity synthesis processing compared commercial silicon (Si) amorphous selenium (

Язык: Английский

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High-performance metal halide perovskite transistors

Nature Electronics, Год журнала: 2023, Номер 6(8), С. 559 - 571

Опубликована: Авг. 7, 2023

Язык: Английский

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Metal‐Free PAZE‐NH₄X₃⋅H₂O Perovskite for Flexible Transparent X‐ray Detection and Imaging

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(36)

Опубликована: Июнь 21, 2022

Metal-free perovskites are of interest for their chemical diversity and eco-friendly properties, recently have been used X-ray detection with superior carrier behavior. However, the size shape complexity organic components results in difficulties evaluating stability high-energy radiation. Herein, we introduce multiple hydrogen-bond metal-free PAZE-NH4 X3 ⋅H2 O perovskite, where H2 leads to more hydrogen bonds appearing between molecules perovskite host. As suggested by theoretical calculations, promote stiffness lattice, increase diffusion barrier inhibit ionic migration. Then, low trap density, high μτ products structural flexibility Br3 give a flexible detector highest sensitivity 3708 μC Gyair-1 cm-2 , ultra-low limit 0.19 μGyair-1 s-1 spatial resolution 5.0 lp mm-1 .

Язык: Английский

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Interlayer‐Spacing Engineering of Lead‐Free Perovskite Single Crystal for High‐Performance X‐Ray Imaging

Advanced Materials, Год журнала: 2023, Номер 35(18)

Опубликована: Фев. 18, 2023

Lead-free A3 Bi2 I9 -type perovskites are demonstrated as a class of promising semiconductors for high-performance X-ray detection due to their high bulk resistivity and strong absorption, well reduced ion migration. However, long interlamellar distance along c-axis, limited carrier transport the vertical direction is bottleneck sensitivity. Herein, new A-site cation aminoguanidinium (AG) with all-NH2 terminals designed shorten interlayer spacing by forming more stronger NH···I hydrogen bonds. The prepared large AG3 single crystals (SCs) render shorter larger mobility-lifetime product 7.94 × 10-3 cm2 V-1 , which three times higher than value measured on best MA3 SC (2.87 ). Therefore, detectors fabricated exhibit sensitivity 5791 uC Gy-1 cm-2 low limit 2.6 nGy s-1, short response time 690 µs, all far better those state-of-the-art detectors. combination stability enables astonishingly spatial resolution (8.7 lp mm-1 ) imaging. This work will facilitate development low-cost lead-free

Язык: Английский

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Ultrahigh‐Flux X‐ray Detection by a Solution‐Grown Perovskite CsPbBr₃ Single‐Crystal Semiconductor Detector

Advanced Materials, Год журнала: 2023, Номер 35(25)

Опубликована: Март 21, 2023

Solution-processed perovskites are promising for hard X-ray and gamma-ray detection, but there limited reports on their performance under extremely intense X-rays. Here, a solution-grown all-inorganic perovskite CsPbBr3 single-crystal semiconductor detector capable of operating at ultrahigh flux 1010 photons s-1 mm-2 is reported. High-quality single crystals fabricated into detectors with Schottky diode structure eutectic gallium indium/CsPbBr3 /Au. A high reverse-bias voltage 1000 V (435 mm-1 ) can be applied small stable dark current ≈60-70 nA (≈9-10 ), which enables sensitivity larger than 10 000 µC Gyair-1 cm-2 simultaneous low detection limit 22 nGyair . The shows an excellent photocurrent linearity reproducibility 58.61 keV synchrotron X-rays from 106 to Defect characterization by thermally stimulated spectroscopy similar defect density lab irradiated device. Solid-state nuclear magnetic resonance suggests that the crystal may associated its good short-range order, comparable spectrometer-grade melt-grown

Язык: Английский

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Solvent‐Free Synthesis of Inorganic Rubidium Copper Halides for Efficient Wireless Light Communication and X‐Ray Imaging

Advanced Functional Materials, Год журнала: 2023, Номер 33(47)

Опубликована: Июль 31, 2023

Abstract Lead‐free metal halides have recently received sustained attention because of their nontoxicity, low‐cost, as well excellent stability and optoelectronic properties. However, most the reported lead‐free are synthesized via slow solution‐processing at high temperature in toxic solvents, which may impede commercial applications. Here, a solvent‐free strategy is proposed to synthesize inorganic rubidium copper (Rb 2 CuX 3 , X = Cl, Br) room temperature, exhibit efficient violet emission dominated by self‐trapped excitons (STEs) mechanism attractive stabilities against ultraviolet illumination heating. Thus, Rb powders employed emitters scintillators applied wireless light communication X‐ray imaging technologies. Under orthogonal frequency division multiplexing modulation, demonstrate broad −3 dB bandwidth 26.3 MHz data rate 205.1 Mbps. Additionally, flexible scintillation films based on as‐prepared fabricated show outstanding properties, including spatial resolution 18.1 lp mm −1 low detection limit 104 nGy air s promising performance for irregular objects. These results suggest large‐scale production nontoxic potential commercialization fields high‐speed radiography.

Язык: Английский

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Halide Perovskites and Their Derivatives for Efficient, High‐Resolution Direct Radiation Detection: Design Strategies and Applications

Advanced Materials, Год журнала: 2023, Номер 36(8)

Опубликована: Сен. 20, 2023

The past decade has witnessed a rapid rise in the performance of optoelectronic devices based on lead-halide perovskites (LHPs). large mobility-lifetime products and defect tolerance these materials, essential for optoelectronics, also make them well-suited radiation detectors, especially given heavy elements present, which is strong X-ray γ-ray attenuation. Over decade, LHP thick films, wafers, single crystals have to direct detectors that outperformed incumbent technologies terms sensitivity (reported values up 3.5 × 10

Язык: Английский

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Surface-defect-passivation-enabled near-unity charge collection efficiency in bromide-based perovskite gamma-ray spectrum devices

Nature Photonics, Год журнала: 2024, Номер 18(3), С. 250 - 257

Опубликована: Янв. 8, 2024

Язык: Английский

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