TY - JOUR
T1 - Contact engineering for 2D materials and devices
AU - Schulman, Daniel S.
AU - Arnold, Andrew J.
AU - Das, Saptarshi
N1 - Funding Information:
The work of D. S. S., and S. D. was partially supported through Grant No. ECCS-1640020 from the National Science Foundation (NSF) and Contract No. 2016-NE-2699 from Semiconductor Research Corporation. The work of A. J. A., and S. D. was partially supported through Grant Number FA9550-17-1-0018 from Air Force Office of Scientific Research (AFOSR) through the Young Investigator Program.
Funding Information:
State University as an Assistant Professor in 2016. Prof. Das received the Young Investigator Program (YIP) award from the Air Force Office of Scientific Research (AFOSR) in 2017 to pursue the investigation of contacts to 2D materials. He has published over 30 journal articles and holds 3 patents. The Das research group has broad interests in 2D materials for novel next generation nanodevices such as high performance flextronics, optoelectronics, bioelectronics, beyond-Boltzmann ultra-low-power devices, and non-von Neumann neuromorphic computing.
PY - 2018/5/7
Y1 - 2018/5/7
N2 - Over the past decade, the field of two-dimensional (2D) layered materials has surged, promising a new platform for studying diverse physical phenomena that are scientifically intriguing and technologically relevant. Contacts are the communication links between these 2D materials and the three-dimensional world for probing and harnessing their exquisite electronic properties. However, fundamental challenges related to contacts often limit the ultimate performance and potential of 2D materials and devices. This article provides a comprehensive overview of the basic understanding and importance of contacts to 2D materials and various strategies for engineering and improving them. In particular, we elucidate the phenomenon of Fermi level pinning at the metal/2D contact interface, the Schottky versus Ohmic nature of the contacts and various contact engineering approaches including interlayer contacts, phase engineered contacts, and basal versus edge plane contacts, among others. Finally, we also discuss some of the relatively under-addressed and unresolved issues, such as contact scaling, and conclude with a future outlook.
AB - Over the past decade, the field of two-dimensional (2D) layered materials has surged, promising a new platform for studying diverse physical phenomena that are scientifically intriguing and technologically relevant. Contacts are the communication links between these 2D materials and the three-dimensional world for probing and harnessing their exquisite electronic properties. However, fundamental challenges related to contacts often limit the ultimate performance and potential of 2D materials and devices. This article provides a comprehensive overview of the basic understanding and importance of contacts to 2D materials and various strategies for engineering and improving them. In particular, we elucidate the phenomenon of Fermi level pinning at the metal/2D contact interface, the Schottky versus Ohmic nature of the contacts and various contact engineering approaches including interlayer contacts, phase engineered contacts, and basal versus edge plane contacts, among others. Finally, we also discuss some of the relatively under-addressed and unresolved issues, such as contact scaling, and conclude with a future outlook.
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U2 - 10.1039/c7cs00828g
DO - 10.1039/c7cs00828g
M3 - Review article
C2 - 29498729
AN - SCOPUS:85046885505
VL - 47
SP - 3037
EP - 3058
JO - Chemical Society Reviews
JF - Chemical Society Reviews
SN - 0306-0012
IS - 9
ER -