Open AccessUltrashort Vertical‐Channel van der Waals Semiconductor Transistors
Author(s) -
Jiang Jinbao,
Doan ManhHa,
Sun Linfeng,
Kim Hyun,
Yu Hua,
Joo MinKyu,
Park Sang Hyun,
Yang Heejun,
Duong Dinh Loc,
Lee Young Hee
Publication year - 2020
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.201902964
Subject(s) - van der waals force , materials science , monolayer , semiconductor , field effect transistor , transistor , nanotechnology , optoelectronics , chemical vapor deposition , fabrication , wafer , voltage , chemistry , electrical engineering , molecule , medicine , alternative medicine , organic chemistry , engineering , pathology
Atomically thin 2D van der Waals semiconductors are promising candidates for next‐generation nanoscale field‐effect transistors (FETs). Although large‐area 2D van der Waals materials have been successfully synthesized, such nanometer‐length‐scale devices have not been well demonstrated in 2D van der Waals semiconductors. Here, controllable nanometer‐scale transistors with a channel length of ≈10 nm are fabricated via vertical channels by squeezing an ultrathin insulating spacer between the out‐of‐plane source and drain electrodes, and the feasibility of high‐density and large‐scale fabrication is demonstrated. A large on‐current density of ≈70 µA µm −1 nm −1 at a source–drain voltage of 0.5 V and a high on/off ratio of ≈10 7 –10 9 are obtained in ultrashort 2D vertical channel FETs with monolayer MoS 2 synthesized through chemical vapor deposition. The work provides a promising route toward the complementary metal–oxide–semiconductor‐compatible fabrication of wafer‐scale 2D van der Waals transistors with high‐density integration.