Van Der Waals Hybrid Integration of 2D Semimetals for Broadband Photodetection

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

Published: Feb. 13, 2025

Abstract Hybrid heterostructures are pivotal in the advanced broadband detection technology. The emergence of 2D semimetals has expanded range materials beyond conventional narrow‐gap for room‐temperature applications due to their extraordinary optical and electrical properties. This review outlines cutting‐edge latest advancements photodetectors (PDs) engineered from that synergistically combine with several different dimensional materials. It begins a fundamental investigation, offering an in‐depth explanation essential material properties summary synthesis methodologies. Then, discussion advances provide analytical overview categorization, underlying photodetection mechanism, figures‐of‐merit these PDs. Subsequently, narrative shifts comprehensive analysis heterogeneous integrated devices. further highlights diverse optoelectronic PDs, spanning image sensing, communication, position‐sensitive detection, sensing computing, spintronics, computational spectroscopy thoroughly highlighted. Finally, concludes by addressing challenges opportunities advancing semimetal photodetection.

Language: Английский

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Self-powered, touchless, interface-friendly cellulose fabric-based sensor via electrostatic flocking strategy

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: unknown, P. 141199 - 141199

Published: Feb. 1, 2025

Language: Английский

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High‐Sensitive Uncooled Mid‐Wave Infrared Photodetector Based on PtSe₂/MoTe₂ Heterojunction with Fast Speed

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

Published: Feb. 24, 2025

Abstract Mid‐wave infrared (MWIR) sensing technology provides tremendous support for cutting‐edge applications in autonomous navigation, quantum information, and optical telecommunications. Recent researchers have reported substantial advancements the MWIR photodetection based on 2D topological semimetal platinum selenide (PtSe 2 ). However, its application prospect has been constrained by limited sensitivity sluggish response speed. Herein, an uncooled photodetector integrating PtSe with MoTe is reported, which features high responsivity ( R ) of 8.4–2.5 A W −1 specific detectivity D* 4.5 × 10 9 –1.3 cm Hz 1/2 from 2.75 to 4.25 µm. At 10.6 µm wavelength, it still able showcase a decent 0.12 . Notably, achieves brilliant photoresponse speed 3–5 µs visible near‐infrared (NIR) spectral ranges competitive 3 dB frequency 0.13 MHz. Meanwhile, promising fast 560 demonstrated at 4050 nm range, unveils conspicuous ability track ultrafast broadband light signals. It might be attributed carrier mobility strong built‐in electric field /MoTe interface. This research can provide viable pathway next‐generation room‐temperature photodetectors

Language: Английский

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Solution‐Processable Van Der Waals Heterojunctions on Silicon for Self‐Powered Photodetectors with High Responsivity and Detectivity

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Abstract The high density of surface states on silicon has long impeded the development high‐performance photodetectors, leading to excessive dark leakage currents that adversely affect responsivity and detectivity. Herein, an all‐solution‐processable method is presented for fabricating photodetectors through consecutive spray‐coating a conductive metal‐organic framework (MOF, Cu 3 (HHTP) 2 ) metallic Ti C MXene form van der Waals dual junctions substrate. heterojunction configuration facilitates unidirectional electron‐hole separation within /Si interface with type I band alignment, while leveraging potential barrier difference between /Cu Schottky junctions. photodetector demonstrates outstanding photoelectric performance, operating in self‐powered mode specific detectivity 1.63 × 10 12 Jones large 1.8 A W −1 under 365 nm illumination. It also exhibits impressive on/off ratio exceeding 3.9 4 at incident light power 330 µW cm −2 . Additionally, maintains excellent across broad wavelength range from 700 nm, spanning ultraviolet visible light, sets new performance benchmark MOF‐based photodetectors. This work introduces straightforward, controllable approach constructing high‐quality semiconductor surfaces, enabling fabrication optoelectronic devices enhanced performance.

Language: Английский

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All-Gel-Based Triboelectric Noncontact Sensor for Human Motion Perception

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Flexible noncontact sensors are of great significance in contemporary applications. Nevertheless, conventional that rely on metal electrodes have limited flexibility, and their multilayer architectures likely to experience interfacial delamination during extended use. To tackle these problems, we introduce an all-gel-based flexible triboelectric sensor, which consists two parts, i.e., the gelatin/poly(vinyl alcohol) (PVA)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/graphene (G) electrode hydrogel PVA/cellulose/carbon nanotubes (CNT) aerogel. The not only features outstanding biocompatibility but also exhibits high conductivity. aerogel demonstrates excellent mechanical properties, such as good elasticity durability. This sensor can stably output a current 1.18 μA, charge 18.4 nC/cm2, voltage 3.7 V at stable state. It accurately reliably detect wide range human motions, elbow bending, knee movement, running, providing reliable approach for motion perception facilitating progress relevant fields.

Language: Английский

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