Lithium-ion electrolytic substrates for sub-1V high-performance transition metal dichalcogenide transistors and amplifiers

• Type: Article in International Scientific Journal
• Date: 2020-06-24

Authors

Md Hasibul Alam (Author) Other; Zifan Xu (Author) Other; Sayema Chowdhury (Author) Other; Zhanzhi Jiang (Author) Other; Sanjay K. Banerjee (Author) Other; Keji Lai (Author) Other; Helena Braga (Author) FEUP; Deji Akinwande (Author) Other

Journal

Title: Nature Communications

Vol. 11 No. 3203

ISSN: 2041-1723

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 5 Citations

Other information

Authenticus ID: P-00S-C19

DOI: 10.1038/s41467-020-17006-w

Abstract (EN): Electrostatic gating of two-dimensional (2D) materials with ionic liquids (ILs), leading to the accumulation of high surface charge carrier densities, has been often exploited in 2D devices. However, the intrinsic liquid nature of ILs, their sensitivity to humidity, and the stress induced in frozen liquids inhibit ILs from constituting an ideal platform for electrostatic gating. Here we report a lithium-ion solid electrolyte substrate, demonstrating its application in high-performance back-gated n-type MoS2 and p-type WSe2 transistors with sub-threshold values approaching the ideal limit of 60 mV/dec and complementary inverter amplifier gain of 34, the highest among comparable amplifiers. Remarkably, these outstanding values were obtained under 1 V power supply. Microscopic studies of the transistor channel using microwave impedance microscopy reveal a homogeneous channel formation, indicative of a smooth interface between the TMD and underlying electrolytic substrate. These results establish lithium-ion substrates as a promising alternative to ILs for advanced thin-film devices.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9