Effective Dual Cation Release in Quasi‐2D Perovskites for Ultrafast UV Light‐Powered Imaging

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

Published: Nov. 17, 2024

Ruddlesden-Popper quasi-2D perovskites represent robust candidates for optoelectronic applications, achieving a delicate balance between outstanding photoresponse and stability. However, mitigating the internal defects in polycrystalline films remains challenging, their performances still lag behind that of 3D counterparts. This work highlights profound impact defect passivation at buried interface grain boundaries through dual-cation-release strategy. Cations released from pre-deposited inorganic iodide buffer layer effectively repair deep-level by inducing low-dimensional phase reconstruction interacting with undercoordinated ions. The resulting perovskite feature large size (>2 µm) minimum surface roughness, along alleviated out-of-plane residual tensile strain, which is beneficial inhibiting initiation propagation cracks. fabricated photodetector demonstrates drastically improved self-powered capability, maximum responsivity up to 0.41 A W

Language: Английский

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High‐Purity Photoactive α‐Phase for Flexible Perovskite Photodetectors with Modified Electron Transport Layer

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

Abstract Regulating the crystallization process of organic–inorganic halide perovskite is essential for fabrication reproducible and efficient optoelectronic devices. Herein, a vacuum‐assisted heating treatment strategy precursor developed to obtain high‐purity photoactive phase perovskite. By eliminating residual H 2 O molecules from raw materials solvents, method prevents Pb–I framework being destroyed. Additionally, pre‐treated possesses high‐valence iodoplumbate species leading preferable films. Furthermore, high on‐off ratio 1103 attained under 0 V 550 nm illumination by employing vertical n–i–p photodetector based on pure 𝛼‐phase films interface passivation carried out incorporating phenethylammonium hydroiodide (PEAI) in n ‐type electron transport layer. The exhibits sensitivity with peak responsivity 0.93 A W −1 detectivity 1.55 × 10 12 Jones visible light range, making it potential candidate an imaging application. flexible fabricated polyethylene terephthalate (PET) substrate maintains 98.6% photocurrent density after 300 times bending preliminarily realizes sensing. heat‐treating improves adaptability complex environments enables preparation films, which boast enormous applications.

Language: Английский

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Lead-free single crystal metal halide perovskite detectors

Materials Science and Engineering R Reports, Journal Year: 2025, Volume and Issue: 164, P. 100991 - 100991

Published: April 9, 2025

Language: Английский

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Recent advances in III–V nitrides: properties, applications and perspectives

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(32), P. 12150 - 12178

Published: Jan. 1, 2024

This paper reviews recent research on III–V nitrides, including their physical and chemical properties, synthesis methods, applications in optoelectronic devices.

Language: Английский

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Light‐State Rectification Behaviors Induced by Interlayer Excitons in Mixed‐Dimensional Single‐Crystalline Perovskite Heterostructures

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

Published: Oct. 6, 2024

Abstract Stacking different layers into van der Waals heterostructures (vdWHs) provides an attractive approach to integrating intrinsic prominent properties of the constituents. Mixed‐dimensional vdWHs that can interact with external fields are particularly intriguing because they host interlayer excitons (IXs) and thereby exhibiting rich physical phenomena novel device behaviors. However, previous studies IXs have primarily focused on TMDs systems, leaving excitonic correlated physics in perovskite poorly understood. Here, 2D‐3D ((BA) 2 PbBr 4 ‐CsPbBr 3 ) single‐crystalline designed discover modulation effects IX states optical optoelectronic properties. Interestingly, exhibit a newly emerging emission at 546 nm obvious broadening phenomenon FWHM. The vdWHs‐based photodetectors display light‐state rectification behaviors change output photocurrents from fully off rectified after illumination, resulting high ratio up 24342 enhanced on/off 7000. results attributed presence states, which facilitate carrier hopping interfaces. This work establishes mixed‐dimensional heterolayers as highly adaptable platform for exciton research applications.

Language: Английский

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Electronic Regulation by Fe-Doped CoP_x Hydrophilic Self-Supported Nanorod Arrays as Bifunctional Electrocatalysts for Superior Overall Seawater Splitting

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 3, 2025

To address the challenge of designing a highly reactive and stable bifunctional electrocatalyst for both hydrogen evolution reaction (HER) oxygen (OER), hydrophilic Fe-CoPx nanorod array on nickel foam (NF) was designed prepared in this work. The modulation d-band center Co by adding Fe effectively optimized adsorption energy intermediates. synergistic effect bimetallic active sites significantly enhanced electrocatalytic performance reactions. In alkaline seawater, Fe-CoPx/NF exhibited excellent HER (−32 mV at −10 mA cm–2) OER (216 10 activities, maintaining stability over 100 h cm–2. For overall seawater electrolysis, catalyst achieved low cell voltage 1.54 V cm–2, outperforming conventional RuO2∥Pt/C electrode (1.58 cm–2). Additionally, simulated industrial flow cell, operated stably 200 indicating its strong potential practical applications. This study introduced simple synthesis method phosphides, providing new avenue design high-performance catalysts electrolysis.

Language: Английский

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2D Ruddlesden‐Popper Perovskites/PVDF‐TrFE Photodetector for Anti‐Interference Vision System Derived from Ferroelectric Polarization Modulation

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 5, 2025

Abstract 2D Ruddlesden‐Popper (RP) perovskites have garnered increasing attention for their excellent photoresponse, characterized by high carrier mobility, tunable bandgaps, optical absorption, and molecular asymmetry. Herein, centimeter scale single crystal hybrid perovskites, BA 2 PbBr 4 (BPB) is synthesized, using quasi‐static cooling method composited with ferroelectric PVDF‐TrFE(PT) film to construct a multi‐field coupling photodetector (PD) via van der Waals force contact. Ferroelectric tests show that the PT exhibits saturated polarization strength of 3.6 µC cm −2 , allowing localized field modulate band structure enhance photocurrent. The Heterojunction systems exhibit ultra‐high responsivity (15.3 A W −1 ) detectivity (1.99 × 10 13 Jones) under 390 nm illumination at 3 V bias, performance improvement over times compared BPB PDs. Furthermore, PDs highly stable I–t curve photocurrent retention rate 97.4%. Leveraging this feature, large‐area imaging device designed level scale, enabling multifunctional vision applications accurate letter process anti‐interference number detection. work presents valuable insight in design future autonomous driving systems.

Language: Английский

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Recent progress on stability and applications of flexible perovskite photodetectors

Journal of Semiconductors, Journal Year: 2025, Volume and Issue: 46(1), P. 011601 - 011601

Published: Jan. 1, 2025

Abstract Flexible photodetectors have garnered significant attention by virtue of their potential applications in environmental monitoring, wearable healthcare, imaging sensing, and portable optical communications. Perovskites stand out as particularly promising materials for photodetectors, offering exceptional optoelectronic properties, tunable band gaps, low-temperature solution processing, notable mechanical flexibility. In this review, we explore the latest progress flexible perovskite emphasizing strategies developed photoactive device structures to enhance performance stability. Additionally, discuss typical these devices offer insights into future directions applications.

Language: Английский

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Harsh Environment‐Immune All‐Carbon Visible Light Photodetector: Sensitivity Improvement by Nitrogen‐Vacancy Center Density Enhancement Through Electron Irradiation

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

Published: Feb. 16, 2025

Abstract A novel all‐carbon visible light detector is fabricated on a nitrogen‐doped (N‐doped) single‐crystalline diamond (SCD) with interdigitated nanocarbon ohmic contacts. It has been posited that the formation of nitrogen‐vacancy (NV) centers within photoabsorption layer serves as an effective strategy to augment device's detection capabilities. To illustrate significance this enhancement, NV density manipulated and augmented by electron beam irradiation in moderately N‐doped diamond. Despite incompetent nitrogen doping, enhancement active resulted substantial nearly 1.5 orders magnitude for several critical parameters. The NV‐enabled demonstrates high degree tolerance toward thermal corrosive environments. dark current maintained at level below 0.01 pA even when device operated temperature 250 °C. robust interfacial bonding between nanocarbon‐interdigitated electrodes ensures exhibits no physical or performance deterioration subjected highly results study may provide insights can inform development high‐sensitivity, harsh environment immune detectors benefiting from multiple photon excitation quantum centers.

Language: Английский

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High Photosensitive Amorphous Germanium-Based MIS Photodetector

Physica B Condensed Matter, Journal Year: 2025, Volume and Issue: unknown, P. 417229 - 417229

Published: April 1, 2025

Language: Английский

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