Research on the Technological Progress of CZT Array Detectors

Sensors, Год журнала: 2024, Номер 24(3), С. 725 - 725

Опубликована: Янв. 23, 2024

CdZnTe (CZT) is a new type of compound semiconductor that has emerged in recent years. Compared to other materials, it possesses an ideal bandgap, high density, and electron mobility, rendering excellent room-temperature composite material for X-ray γ-ray detectors. Due the exceptional performance CZT material, detectors manufactured using exhibit energy resolution, spatial detection efficiency. They also have advantage operating at room temperature. array detectors, furthermore, demonstrate outstanding three-dimensional imaging capabilities. Researchers worldwide conducted extensive studies on this subject. This paper, building upon foundation, provides comprehensive analysis crystals summarizes existing research offer valuable insights envisioning detector methodologies.

Язык: Английский

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Pressure Engineering on Perovskite Structures, Properties, and Devices

Advanced Functional Materials, Год журнала: 2024, Номер 34(27)

Опубликована: Март 4, 2024

Abstract As a fundamental thermodynamic parameter, pressure serves as an effective tool to control the structures and properties of functional materials. To date, numerous pressure‐engineering methods have been introduced enhance perovskite devices. This paper comprehensively reviews advances in understanding effects on materials devices, encompassing both low high‐pressure influences. These are categorized into six distinct groups based their underlying mechanisms, detailing evolution from macroscopic microscopic levels, exploring interplay between these characteristics. Finally, current challenges offer insights future prospects for harnessing further develop structures, properties, devices assessed.

Язык: Английский

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Tailoring Multi‐Phenyl Ring Cation for Stable Scalable Hybrid Bismuth Iodide Amorphous Film: Enabling Record Sensitivity and High‐Performance X‐Ray Array Imaging

Advanced Materials, Год журнала: 2024, Номер 36(33)

Опубликована: Июнь 22, 2024

The 329-type bismuth (Bi)-based metal halide (MH) polycrystalline films have potential to be applied in the new generation of X-ray imaging technology owing high absorption coefficients and excellent detection properties. However, mutually independent [Bi

Язык: Английский

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X‐Ray Real‐Time Imaging and Delayed Imaging from Lead‐Free Perovskite Scintillators

Advanced Optical Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 13, 2024

Abstract X‐ray detection is vital in various fields such as medical imaging, security screening, and materials analysis. However, to meet the diverse requirements across different scenarios, current scintillators used for encounter challenges both immediate delayed radiation detections. In this work, flexibly controlling trap distribution through extra ions doping into Cs 2 NaTbCl 6 lead‐free perovskites presents a promising avenue addressing these advancing dose capabilities scientific domains. By Sb 3+ host, traps are significantly passivated improved crystallinity, resulting suppression of afterglow behaviors endowing high‐resolution real‐time dynamic detection. Additionally, incorporation Mn 2+ matrix causes significant lattice distortion, leading increased concentrations shallow deep traps, effectively boosting efficiency. This work may provide an effective strategy constructing efficient realization multi‐environmental imaging.

Язык: Английский

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Organic Spacers Modulated Low Dose X‐Ray Detection in Hybrid Halide 2D Perovskites: Unveiling Exciton Dynamics

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 16, 2025

In this study, we investigate how modulating organic spacers in perovskites influences their X-ray detection performance and reveal the mechanism of low-dose with high sensitivity using femtosecond-transient absorption spectroscopy (fs-TAS). Particularly, employ N,N,N',N'-tetramethyl-1,4-phenylenediammonium (TMPDA) N,N-dimethylphenylene-p-diammonium (DPDA) as to synthesize 2D perovskite single crystals (SCs). We find that DPDA-based SCs exhibit reduced interplanar spacing between inorganic layers, leading increased lattice packing. Density functional theory (DFT) results indicate effective mass lower distortion (DPDA)PbBr4 suppressing formation self-trapped exciton (STEs) electron-phonon coupling enhancing carrier delocalization these SCs. Further, measurements demonstrates higher than (TMPDA)PbBr4, attributed its enhanced delocalization, mobility-lifetime product. The limit (LoD) for is determined be 13 nGy/s, significantly both commercial detectors state-of-the-art perovskite-based detectors. Furthermore, fs-TAS study reveals prolonged hot STE cooling decay lifetimes, which directly correlate sensitivity. This highlights impact on performance, providing a framework designing ultra-low LoD essential health security applications.

Язык: Английский

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Large-n quasi-phase-pure two-dimensional halide perovskite: A toolbox from materials to devices

Science Bulletin, Год журнала: 2023, Номер 69(3), С. 382 - 418

Опубликована: Дек. 8, 2023

Язык: Английский

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Dion–Jacobson Phase Perovskite Crystal Assembled by π‐Conjugated Aromatic Spacer for X‐Ray Detectors with an Ultralow Detection Limit

Advanced Functional Materials, Год журнала: 2023, Номер 34(9)

Опубликована: Ноя. 14, 2023

Abstract 2D Dion–Jacobson (DJ) perovskites recently have attracted extensive attention for X‐ray detection owing to their structural rigidity and environmental stability. The chemical incorporation of π ‐conjugation aromatic spacing cations into DJ phase will increase the cation electron cloud density between adjacent inorganic slabs, thus facilitating charge transport. However, it is still a challenge synthesize high‐quality single crystals perovskite with spacers detecting applications. Here, new by introducing ‐conjugated spacer, (4ABA)PbI 4 ( 1 , 4ABA = 4‐aminobenzylamine), eliminating van der Waals gap designed. High‐quality are grown via facile solution method, exhibiting high resistivity (1.97 × 10 11 Ω cm), low trap (3.36 9 cm −3 ), large carrier mobility‐lifetime product (1.03 2 V −1 ) under illumination. Such remarkable physical characteristics endow crystal detector high‐performance including sensitivity 572 µC Gy air −2 an ultralow limit 7.50 nGy s exceptional radiation over 700 times lower than that routine medical diagnosis (5500 demonstrating potential applications in examination.

Язык: Английский

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Exploring centimeter-sized crystals of bismuth-iodide perovskite toward highly sensitive X-ray detection

Chinese Chemical Letters, Год журнала: 2023, Номер 35(6), С. 108708 - 108708

Опубликована: Июнь 25, 2023

Язык: Английский

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Mitigating Noise Current in 2D Perovskite Single Crystal Photodetectors for Imaging under Black‐Light Condition

Advanced Functional Materials, Год журнала: 2024, Номер 34(45)

Опубликована: Июль 20, 2024

Abstract Weak‐light imaging plays a pivotal role in various fields such as astronomical photography, military nighttime surveillance, and biomedical imaging. The capability of photodetectors (PDs) detecting weak‐light relies heavily on minimizing their noise current. In this study, the detection performances PDs constructed from PEA 2 MA n‐1 Pb n I 3n+1 ( = 1, 2, 3) 2D perovskite single crystals are presented. Among these, 1 PD showcases incredibly low current that induces an ultra‐low limit 14 pW cm −2 under 532 nm light illumination, high detectivity 3.25 × 10 15 Jones. also meets requirements even black‐level illumination conditions 75 . investigation reveals decreasing value corresponds to increase + ratios cations, resulting reduced defects enhanced ion migration activation energy exciton binding energy. These reduce devices electron/hole, ion, dynamic behaviors. Notably, inhibiting can significantly improve stability baseline facilitate stable weak signals. This study underscores potential perovskites for advancing technologies, offering valuable insights future development field.

Язык: Английский

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High‐performance 110 kVp hard x‐ray detector based on all‐crystalline‐surface passivated perovskite single crystals

InfoMat, Год журнала: 2024, Номер 6(8)

Опубликована: Июнь 18, 2024

Abstract Halide perovskite single crystals (SCs) have attracted much attention for their application in high‐performance x‐ray detectors owing to desirable properties, including low defect density, high mobility–lifetime product ( μτ ), and long carrier diffusion length. However, suppressing the inherent defects perovskites overcoming ion migration primarily caused by these remains a challenge. This study proposes facile process dipping Cs 0.05 FA 0.9 MA PbI 3 SCs synthesized solution‐based inverse temperature crystallization method into 2‐phenylethylammonium iodide (PEAI) solution reduce number of defects, inhibit migration, increase sensitivity. Compared conventional spin coating, this simple forms two‐dimensional PEA 2 4 layer on all SC surfaces without further treatment, effectively passivating inherently defective minimizing migration. As result, PEAI‐treated SC‐based detector achieves record sensitivity 1.3 × 10 5 μC Gy air −1 cm −2 with bias voltage 30 V at realistic clinical dose rates 1–5 mGy s (peak potential 110 kVp), which is 6 times more sensitive than an untreated orders magnitude commercial α‐Se‐based detector. Furthermore, PEAI‐treated‐perovskite exhibits detection limit (73 nGy improved response, clear images scanning method, highlighting effectiveness PEAI approach fabricating next‐generation detectors. image

Язык: Английский

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