High-Performance Monolayer WS sub(2) Field-Effect Transistors on High- Kappa Dielectrics

The combination of high-quality Al sub(2)O sub(3) dielectric and thiol chemistry passivation can effectively reduce the density of interface traps and Coulomb impurities, leading to a significant improvement of the mobility and a transition of the charge transport from the insulating to the metallic...

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Published in:Advanced materials (Weinheim) 2015-09, Vol.27 (35), p.5230-5234
Main Authors: Cui, Yang, Xin, Run, Yu, Zhihao, Pan, Yiming, Ong, Zhun-Yong, Wei, Xiaoxu, Wang, Junzhuan, Nan, Haiyan, Ni, Zhenhua, Wu, Yun, Chen, Tangsheng, Shi, Yi, Wang, Baigeng, Zhang, Gang, Zhang, Yong-Wei, Wang, Xinran
Format: Article
Language:English
Subjects:
Aluminum oxide
Charge transport
Coulomb friction
Density
Dielectrics
Field effect transistors
Monolayers
Semiconductor devices
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container_issue 35
container_start_page 5230
container_title Advanced materials (Weinheim)
container_volume 27
creator Cui, Yang
Xin, Run
Yu, Zhihao
Pan, Yiming
Ong, Zhun-Yong
Wei, Xiaoxu
Wang, Junzhuan
Nan, Haiyan
Ni, Zhenhua
Wu, Yun
Chen, Tangsheng
Shi, Yi
Wang, Baigeng
Zhang, Gang
Zhang, Yong-Wei
Wang, Xinran
description The combination of high-quality Al sub(2)O sub(3) dielectric and thiol chemistry passivation can effectively reduce the density of interface traps and Coulomb impurities, leading to a significant improvement of the mobility and a transition of the charge transport from the insulating to the metallic regime. A record high mobility of 83 cm super(2) V super(-1) s super(-1) (337 cm super(2) V super(-1) s super(-1)) is reached at room temperature (low temperature) for monolayer WS sub(2). A theoretical model for electron transport is also developed.
doi_str_mv 10.1002/adma.201502222
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subjects Aluminum oxide
Charge transport
Coulomb friction
Density
Dielectrics
Field effect transistors
Monolayers
Semiconductor devices
title High-Performance Monolayer WS sub(2) Field-Effect Transistors on High- Kappa Dielectrics
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