Van der Waals Integration Based on Two‐Dimensional Materials for High‐Performance Infrared Photodetectors

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(30)

Published: May 13, 2021

Abstract Infrared photodetectors have been widely applied in various fields, including thermal imaging, biomedical and communication. Van der Waals (vdW) integration based on 2D materials provides a new solution for high‐performance infrared due to the versatile device configurations excellent photoelectric properties. In recent years, great progress has made vdW integration. this review, integration‐based is presented. First, working mechanisms advantages of with different structures band alignments are Then, reviewed, focusing 2D/ n D ( = 0, 1, 2, 3) integration, engineering as well performance discussed detail. Finally, summary delivered, challenges future directions provided.

Language: Английский

---

Moiré Patterns in 2D Materials: A Review

ACS Nano, Journal Year: 2021, Volume and Issue: 15(4), P. 5944 - 5958

Published: March 26, 2021

Quantum materials have attracted much attention in recent years due to their exotic and incredible properties. Among them, van der Waals stand out weak interlayer coupling, providing easy access manipulating electrical optical Many fascinating electrical, optical, magnetic properties been reported the moiré superlattices, such as unconventional superconductivity, photonic dispersion engineering, ferromagnetism. In this review, we summarize methods prepare superlattices focus on current discoveries of pattern-modified properties, findings atomic reconstruction, well some possible future directions field.

Language: Английский

---

Excitons in semiconductor moiré superlattices

Nature Nanotechnology, Journal Year: 2022, Volume and Issue: 17(3), P. 227 - 238

Published: March 1, 2022

Language: Английский

---

2D Metal Chalcogenides for IR Photodetection

Small, Journal Year: 2019, Volume and Issue: 15(30)

Published: May 21, 2019

Abstract Infrared (IR) photodetectors are finding diverse applications in imaging, information communication, military, etc. 2D metal chalcogenides (2DMCs) have attracted increasing interest view of their unique structures and extraordinary physical properties. They demonstrated outstanding IR detection performance including high responsivity detectivity, on/off ratio, fast response rate, stable room temperature operability, good mechanical flexibility, which has opened up a new prospect next‐generation photodetectors. This Review presents comprehensive summary recent progress advanced based on 2DMCs. The rationale the containing photocurrent generation mechanisms parameters briefly introduced. device performances 2DMCs‐based also systematically summarized, some representative achievements highlighted as well. Finally, conclusions outlooks delivered guideline for this thriving field.

Language: Английский

---

WSe₂ 2D p‐type semiconductor‐based electronic devices for information technology: Design, preparation, and applications

InfoMat, Journal Year: 2020, Volume and Issue: 2(4), P. 656 - 697

Published: March 2, 2020

Abstract The pioneering exfoliation of monolayer tungsten diselenide has greatly inspired researchers toward semiconducting applications. WSe 2 belongs to a family transition‐metal dichalcogenides. Similar graphene, and analogous dichalcogenides have layered structures with weak van der Waals interactions between two adjacent layers. First, the readers are presented fundamentals 2, such as types, morphologies, properties. Here, we report characterization principles practices microscopy, spectroscopy, diffraction. Second, methods for obtaining high‐quality , exfoliation, hydrothermal chemical vapor deposition, briefly listed. With advantages light weight, flexibility, high quantum efficiency, 2D materials may niche in optoelectronics building blocks p‐n junctions. Therefore, introduce state‐of‐the‐art demonstration heterostructure devices employing p‐type semiconductor. device architectures include field‐effect transistors, photodetectors, gas sensors, photovoltaic solar cells. Due its unique electronic, optical, energy band properties, been increasingly investigated due conductivity charge carrier upon palladium contact. Eventually, dynamic research on heterostructures is summarized arouse passion community. image

Language: Английский

---

Emerging van der Waals junctions based on TMDs materials for advanced gas sensors

Coordination Chemistry Reviews, Journal Year: 2021, Volume and Issue: 447, P. 214151 - 214151

Published: July 31, 2021

Language: Английский

---

Non‐3d Metal Modulation of a 2D Ni–Co Heterostructure Array as Multifunctional Electrocatalyst for Portable Overall Water Splitting

Small, Journal Year: 2020, Volume and Issue: 16(10)

Published: Jan. 29, 2020

Abstract Portable water splitting devices driven by rechargeable metal–air batteries or solar cells are promising, however, their scalable usages still hindered lack of suitable multifunctional electrocatalysts. Here, a highly efficient electrocatalyst is demonstrated, i.e., 2D nanosheet array Mo‐doped NiCo 2 O 4 /Co 5.47 N heterostructure deposited on nickel foam (Mo‐NiCo N/NF). The successful doping non‐3d high‐valence metal into heterostructured array, which directly grown conductive substrate endows the resultant catalyst with balanced electronic structure, exposed active sites, and binder‐free electrode architecture. As result, Mo‐NiCo N/NF exhibits remarkable catalytic activity toward oxygen evolution reaction (OER) hydrogen (HER), affording high current densities 50 mA cm −2 at low overpotentials 310 mV for OER, 170 HER, respectively. Moreover, voltage 1.56 V achieved N/NF‐based cell to reach 10 . More importantly, portable overall device demonstrated through integration water‐splitting two Zn–air (open‐circuit 1.43 V), all fabricated based N/NF, demonstrating low‐cost way generate fuel energy. This work offers an effective strategy develop high‐performance metal‐doped electrode.

Language: Английский

---

Infrared Interlayer Exciton Emission in MoS2/WSe2 Heterostructures

Physical Review Letters, Journal Year: 2019, Volume and Issue: 123(24)

Published: Dec. 13, 2019

We report light emission around 1 eV (1240 nm) from heterostructures of MoS_{2} and WSe_{2} transition metal dichalcogenide monolayers. identify its origin in an interlayer exciton (ILX) by wide spectral tunability under out-of-plane electric field. From the static dipole moment state, temperature twist-angle dependence, comparison with electronic structure calculations, we assign this ILX to fundamental between K valleys system. Our findings gain access physics intrinsically incommensurate MoS_{2}/WSe_{2} heterostructure, including moiré valley pseudospin effects, integration silicon photonics optical fiber communication systems operating at wavelengths longer than 1150 nm.

Language: Английский

---

Enhanced light–matter interaction in two-dimensional transition metal dichalcogenides

Reports on Progress in Physics, Journal Year: 2021, Volume and Issue: 85(4), P. 046401 - 046401

Published: Dec. 23, 2021

Two dimensional (2D) transition metal dichalcogenide (TMDC) materials, such as MoS2, WS2, MoSe2, and WSe2, have received extensive attention in the past decade due to their extraordinary physical properties. The unique properties make them become ideal materials for various electronic, photonic optoelectronic devices. However, performance is limited by relatively weak light-matter interactions atomically thin form factor. Resonant nanophotonic structures provide a viable way address this issue enhance 2D TMDCs. Here, we an overview of research area, showcasing relevant applications, including exotic light emission, absorption scattering features. We start overviewing concept excitons 1L-TMDC fundamental theory cavity-enhanced followed discussion on recent progress enhanced strong coupling valleytronics. nature enables broad range ways tune its electric optical Thus, continue reviewing advances TMDC-based tunable Next, survey over narrow bandwidths using 1L or few-layer TMDCs, applications photovoltaics photodetectors. also review efforts engineering scattering, e.g., inducing Fano resonances, wavefront TMDCs either integrating resonant structures, plasmonic/Mie metasurfaces, directly patterning monolayer/few layers then intriguing different types van der Waals heterostructures, Finally, draw our opinion potential opportunities challenges rapidly developing field research.

Language: Английский

---

Photonic van der Waals integration from 2D materials to 3D nanomembranes

Nature Reviews Materials, Journal Year: 2023, Volume and Issue: 8(8), P. 498 - 517

Published: April 21, 2023

Language: Английский

---