van der Waals epitaxial growth of ultrathin metallic NiSe nanosheets on WSe2 as high performance contacts for WSe2 transistors

Zhao, Bei; Dang, Weiqi; Yang, Xiangdong; Li, Jia; Wang, Kai; Luo, Jun; Zhang, Zhengwei; Li, Bo; Xie, Haipeng; Liu, Yuan; Duan, Xidong

doi:10.1007/s12274-019-2423-7

Cited by 35 publications

(29 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[130] In addition, 2D materials (graphene, h-BN, and TMDs) are very effectively used as the substrate for controlling orientation of m-TMDs owing to their high-quality single crystal, atomic flat surface, and lattice symmetry. In Figure 8c, when NiSe nanosheets are epitaxially grown on WSe 2 substrate, it exhibits the relative edge orientations with 0° and 60°, [129] and the corresponding OM image of grown NiSe nanosheets on 2D WSe 2 are shown in Figure 8d. The as-grown NbS 2 on top of h-BN Reproduced with permission.…”

Section: Controlled Growth Of M-tmdsmentioning

confidence: 99%

“…However, some issues still remain unresolved in conventional metals contacted 2D s-TMDs: first, it is difficult to form strong interface bonds between the metals and the 2D s-TMDs owing to no dangling bonds on the pristine surface of a 2D material, thereby increase the contact resistance and cause Fermi-level pinning. [107,129] Second, chemical bonding as well as diffusion between the metal and the 2D s-TMDs leads to the formation of considerable defects, strain, and disorder, thereby, the formation of the glassy layer caused by interdiffusion and strain. [181] Third, in a high-energy metal deposition process, the crystal lattice at or near the interface of the 2D s-TMDs is destroyed by atomic or cluster bombardment and strong local heating.…”

Section: Metal Electrode Contactsmentioning

confidence: 99%

“…[107,178] Recently, Duan et al reported that the WSe 2 FET with NbTe 2 and NiSe used as metal electrode contacts (form vertical vdWH with WSe 2 ) show better on-state current and mobilities than FET with traditional Cr/Au electrodes. [107,129] Zhang et al reported vertically stacked metal-semiconductor TMDs vdWHs, in which Schottky-diode or Ohmic contact-type band alignments could be formed between VSe 2 and p-type WSe 2 or n-type MoSe 2 , respectively (Figure 19c). [174] And then, Zhang et al presented that the mobility of 1T VTe 2 -contacted MoS 2 monolayer devices is ≈47.5 cm 2 V −1 s −1 , which is 6 times higher than that of Ti/Au-contacted MoS 2 monolayer devices (≈8.1 cm 2 V −1 s −1 ).…”

Section: Metal Electrode Contactsmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

2D Metallic Transition‐Metal Dichalcogenides: Structures, Synthesis, Properties, and Applications

Zhao

Shen

Zhang

et al. 2021

Adv Funct Materials

Self Cite

157

View full text Add to dashboard Cite

2D materials and the associated heterostructures define an ideal material platform for investigating physical and chemical properties, and exhibiting new functional applications in (opto)electronic devices, electrocatalysis, and energy storage. 2D transition metal dichalcogenides (2D TMDs), as a member of the 2D materials family including 2D semiconducting TMDs (s-TMDs) and 2D metallic/semimetallic TMDs (m-TMDs) have attracted considerable attention in the scientific community. Over the past decade, the 2D s-TMDs have been extensively researched and reviewed elsewhere. Because of their distinctive physical properties including intrinsic magnetism, chargedensity-wave order and superconductivity, and potential applications, such as high-performance electronic devices, catalysis, and as metal electrode contacts, 2D m-TMDs have grabbed widespread attention in recent years. However, reviews demonstrating the m-TMDs systematically and comprehensively have been rarely reported. Here, the recent advances in 2D m-TMDs in the aspects of their unique structures, synthetic approaches, distinctive physical properties, and functional applications are highlighted. Finally, the current challenges and perspectives are discussed.

show abstract

Section: Controlled Growth Of M-tmdsmentioning

confidence: 99%

Section: Metal Electrode Contactsmentioning

confidence: 99%

Section: Metal Electrode Contactsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

2D Metallic Transition‐Metal Dichalcogenides: Structures, Synthesis, Properties, and Applications

Zhao

Shen

Zhang

et al. 2021

Adv Funct Materials

Self Cite

157

View full text Add to dashboard Cite

show abstract

“…1H-1T interfaces that are formed inside the somewhat intercalated metastable TMDCs nanosheets that corresponds to group VI has been detected as unique electronic heterojunction across a chemically homogeneous layer which purely suggests potential approach to molecular electronic devices (Figure 11c-f). [115,[316][317][318][319][320][321][322][323]…”

Section: Intercalation Chemistry Of Tmdcsmentioning

confidence: 99%

Advances in Liquid‐Phase and Intercalation Exfoliations of Transition Metal Dichalcogenides to Produce 2D Framework

Raza

Hassan

Ikram

et al. 2021

Adv Materials Inter

View full text Add to dashboard Cite

(5 of 46)www.advmatinterfaces.de Figure 3. a) Electronic band structure of various 2D materials. Reproduced under the terms of the CC-BY 4.0 license. [95] Copyright 2016, The Authors, published by MDPI. b) Energy level diagrams of various TMDCs. Reproduced with permission. [19] Copyright 2017, Elsevier B.V. c) Archetypal coordination of TMDCs, octahedral coordination forms 1T structures, while triangular prismatic coordination establishes 2H/3R structures. Reproduced with permission. [82] Copyright 2019, Elsevier. d) Structural top view of various polytypes; in 2H, two layers per repeat, the unit shows trigonal prismatic coordination and in 1T, one layer per repeat unit formed octahedral coordination of TMDCs. Reproduced with permission. [89] Copyright 2012, Springer Nature. e) 3D illustration of typical MX 2 structure having chalcogen (yellow atom) and metal (gray atom). Reproduced with permission. [104] Copyright 2011, Springer Nature. f) Schematic demonstration of phonon active modes and their symmetries of bulks and monolayer in MX 2 structures. Reproduced under the terms of the CC-BY 3.0 license. [105]

show abstract

Synthesis of 2D α‐GeTe Single Crystals and α‐GeTe/WSe₂ Heterostructures with Enhanced Electronic Performance

et al. 2022

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

Two-dimensional (2D) materials have attracted extensive attention due to their important prospects in electronics and optoelectronics. Synthesizing new 2D materials, characterizing their properties, and developing their applications are still important topics. Herein, the synthesis of α-GeTe nanoplates on different substrates via the chemical vapor deposition process and the systematical investigation of their structure and electrical properties, is reported. By controlling the synthesis temperature and carrier gas, α-GeTe nanoplates, with a lateral dimension up to 30 µm and a thickness down to 1.2 nm, which corresponds to the thickness of one unit cell, can be obtained on 2D WSe 2 substrate. Electrical transport studies show 2D α-GeTe nanoplates have an excellent conductivity (9.33 × 10 5 S m −1 ) and an extraordinary breakdown current density (6.1× 10 7 A cm −2 ). Compared with traditional WSe 2 transistors with deposited metal electrodes, the WSe 2 transistors with the metallic α-GeTe nanoplates as van der Waals metal electrodes achieved much better performance, such as higher on-state current (from 7.83 to 23.23 µA µm −1 ) and electron mobility (from 16.5 to 75.0 cm 2 V 1 S 1 ). This study demonstrates an effective pathway to achieve ultrathin 2D materials and provides an accessible strategy to improve the performance of 2D electronic devices.

show abstract

van der Waals epitaxial growth of ultrathin metallic NiSe nanosheets on WSe2 as high performance contacts for WSe2 transistors

Cited by 35 publications

References 39 publications

2D Metallic Transition‐Metal Dichalcogenides: Structures, Synthesis, Properties, and Applications

2D Metallic Transition‐Metal Dichalcogenides: Structures, Synthesis, Properties, and Applications

Advances in Liquid‐Phase and Intercalation Exfoliations of Transition Metal Dichalcogenides to Produce 2D Framework

Synthesis of 2D α‐GeTe Single Crystals and α‐GeTe/WSe₂ Heterostructures with Enhanced Electronic Performance

Contact Info

Product

Resources

About

van der Waals epitaxial growth of ultrathin metallic NiSe nanosheets on WSe2 as high performance contacts for WSe2 transistors

Cited by 35 publications

References 39 publications

2D Metallic Transition‐Metal Dichalcogenides: Structures, Synthesis, Properties, and Applications

2D Metallic Transition‐Metal Dichalcogenides: Structures, Synthesis, Properties, and Applications

Advances in Liquid‐Phase and Intercalation Exfoliations of Transition Metal Dichalcogenides to Produce 2D Framework

Synthesis of 2D α‐GeTe Single Crystals and α‐GeTe/WSe2 Heterostructures with Enhanced Electronic Performance

Contact Info

Product

Resources

About

Synthesis of 2D α‐GeTe Single Crystals and α‐GeTe/WSe₂ Heterostructures with Enhanced Electronic Performance