Characterization of metal contacts for two-dimensional MoS2 nanoflakes
Sumeet Walia, Sivacarendran Balendhran, Yichao Wang, Rosmalini Ab Kadir, Ahmad Sabirin Zoolfakar, Paul Atkin, Jian Zhen Ou, Sharath Sriram, Kourosh Kalantar-zadeh, Madhu Bhaskaran
Applied Physics Letters | AMER INST PHYSICS | Published : 2013
While layered materials are increasingly investigated for their potential in nanoelectronics, their functionality and efficiency depend on charge injection into the materials via metallic contacts. This work explores the characteristics of different metals (aluminium, tungsten, gold, and platinum) deposited on to nanostructured thin films made of two-dimensional (2D) MoS flakes. Metals are chosen based on their work functions relative to the electron affinity of MoS . It is observed, and analytically verified that lower work functions of the contact metals lead to smaller Schottky barrier heights and consequently higher charge carrier injection through the contacts. © 2013 AIP Publishing L..View full abstract
Awarded by Australian Research Council (ARC)
Awarded by Australian Post-Doctoral Fellowships
Awarded by Linkage, Infrastructure, Equipment, and Facilities Grant
The authors acknowledge support from the Australian Research Council (ARC) with project support through Discovery Project No. DP130100062 and DP140100170; Australian Post-Doctoral Fellowships through Discovery Project Nos. DP1092717 (MB) and DP110100262 (SS); and equipment funding through the Linkage, Infrastructure, Equipment, and Facilities Grant No. LE100100215 (SS and KKZ). S. B. acknowledges a publication grant from the School of Graduate Research at RMIT University.