Arising 2D Perovskites for Ionizing Radiation Detection

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(26)

Published: April 5, 2024

2D perovskites have greatly improved moisture stability owing to the large organic cations embedded in inorganic octahedral structure, which also suppresses ions migration and reduces dark current. The suppression of by effectively excessive device noise baseline drift shows excellent potential direct X-ray detection field. In addition, gradually emerged with many unique properties, such as anisotropy, tunable bandgap, high photoluminescence quantum yield, wide range exciton binding energy, continuously promote development ionizing radiation detection. This review aims systematically summarize advances progress halide perovskite semiconductor scintillator detectors, including reported alpha (α) particle, beta (β) neutron, X-ray, gamma (γ) ray structural features their advantages are discussed. Development directions proposed overcome limitations detectors.

Language: Английский

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Spacer Conformation Induced Multiple Hydrogen Bonds in 2D Perovskite toward Highly Efficient Optoelectronic Devices

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(24)

Published: March 27, 2024

Two-dimensional (2D) Dion-Jacobson (DJ) perovskites typically outperform Ruddlesden-Popper (RP) analogs in terms of photodetection (PD). However, the mechanism behind this enhanced performance remains elusive. Theoretical calculations for elucidating interlayer spacer conformation-induced multiple hydrogen bonds 2D perovskite are presented, along with synthesis DPAPbBr

Language: Английский

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

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: May 2, 2024

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 mobility. These ascendancies allow low‐dose high‐resolution imaging. Apartment from a historical overview develop‐X‐ray their performance indicators, this specifically focuses on development innovation using materials. The article concludes by identifying existing challenges discussing potential application industry.

Language: Английский

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High-temperature self-powered X-ray detection in a bilayered hybrid ferroelectric halide perovskite

Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 6, 2025

Language: Английский

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

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 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.

Language: 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, Journal Year: 2024, Volume and Issue: 36(33)

Published: June 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

Language: Английский

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Dion‐Jacobson Type Lead‐Free Double Perovskite with Ultra‐Narrow Aromatic Interlayer Spacing for Highly Sensitive and Stable X‐ray Detection

Small, Journal Year: 2024, Volume and Issue: 20(30)

Published: March 8, 2024

Abstract The low‐toxic and environmentally friendly 2D lead‐free perovskite has made significant progress in the exploration of “green” X‐ray detectors. However, gap detection performance between them their lead‐based analogues remains a matter concern that cannot be ignored. To reduce this gap, shortening interlayer spacing to accelerate migration collection carriers is promising strategy. Herein, Dion‐Jacobson (DJ) double (4‐AP) 2 AgBiBr 8 ( 1 , 4‐AP = 4‐amidinopyridine) with an ultra‐narrow 3.0 Å, constructed by utilizing π‐conjugated aromatic spacers. Strikingly, subsequent enhanced carrier transport increased crystal density lead detectors based on bulk single crystals high sensitivity 1117.3 µC Gy −1 cm −2 superior vast majority similar perovskites. In particular, tight connection inorganic layers divalent cations enhances structural rigidity stability, further endowing detector ultralow dark current drift (3.06 × 10 −8 nA s V 80 V), excellent multiple cycles switching irradiation as well long‐term environmental stability (maintains over 94% photoresponse after 90 days). This work brings perovskites one step closer realizing efficient practical green applications.

Language: Английский

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Ligand‐Assisted Growth of 2D Perovskite Single Crystal for Highly Sensitive X‐Ray Detectors

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(37)

Published: May 14, 2024

Abstract The emerging 2D layered perovskites have promising optoelectronic properties, good intrinsic stability and reduced ion migration, making them effective for detecting X‐ray radiation. However, their application is constrained by poor out‐of‐plane carrier transport. In this study, inch‐sized high‐quality CsPb 2 Br 5 single crystals (SCs) are developed using an organic ligand‐assisted solution process. By modifying the surface energy, anisotropy of crystal growth conquered, resulting in SCs with sufficient thickness detection. Importantly, modification significantly enhanced quality as grown exhibited longer photoluminescence lifetime smaller trap density. Notably, demonstrate unprecedented transport, achieving a high mobility‐lifetime product 2.53 × 10 −2 cm V −1 . This can be attributed to small interlayer distance strong force Cs─Br bonding. Furthermore, possess other intriguing attributes detection, including bulk resistivity outstanding thermal stability. These advantageous properties enable high‐performance vertical‐structure detection superior sensitivity up 8865.6 µC Gy air low detectable dose rate 12.7 nGy s Additionally, exhibit spatial resolution imaging exceptional stability, candidates nondestructive determination.

Language: Английский

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High-Performance Lead-Free Cs₃Bi₂I_xBr_9–x Perovskite X-ray Detector Based on Anionic Engineering

The Journal of Physical Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

Halide perovskites have garnered significant attention in the field of X-ray detection due to their tunable band gap, strong absorption capability, and superior optoelectronic properties. However, high levels dark current noise are detrimental low-dose high-sensitivity raise concerns about stability detectors. Low-dimensional halide with a wide gap been proven be promising material address these challenges. Here, series high-quality Cs3Bi2IxBr9–x single crystals varying ion ratios were grown, relationship between phase transitions changes anion composition revealed. The resistivity effectively reduce detector, laying solid foundation for detectors nearly zero levels. As result, sensitivity 1516 μC Gyair–1 cm–2 low limit (LoD) 6.2 nGyair s–1 obtained, which also exhibit exceptional under heat, voltage, radiation stimuli.

Language: Английский

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A Halobismuthate Hybrid Characteristic of a T-Shaped Cation: Structure, Band Gap, Photocurrent Response, and Theoretical Study

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: May 4, 2025

Seeking new types of halobismuthate hybrids and exploring their physicochemical applications remain very attractive, yet full challenges. Herein, we successfully fabricate structurally characterize a novel with abundant weak interactions, namely, [MCP]3Cs2Bi2I6Cl2 (1, HMCP+ = 1-methyl-4-(carboxyl)pyridinium), which features the discrete [BiI5.45Cl0.55]3- anions that are charge-balanced by Cs+ ions T-shaped [Bi(MCP)3I0.55Cl1.45]+ cations. UV-vis diffuse reflection studies show compound 1 possesses semiconducting property, an optical band gap 2.35 eV. More prominently, it exhibits excellent photoelectric switching ability, whose photocurrent density (2.64 μA·cm-2) greatly outperforms or compares well those many high-performance metal halide analogues. In addition, also displays wavelength-dependent response behavior. Further theoretical analyses reveal its valence maximum conduction minimum largely from organic moiety halogen, may offer guidance for design synthesis newer halobismuthates unique structures desirable properties.

Language: Английский

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