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First-Principles Study on Layered C2N-Metal Interfaces
Zhao Chen1, Ruiqi Zhang1, Jinlong Yang1
1Hefei National Laboratory for Physical Sciences at the Microscale, CAS Centre for Excellence Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|February 6, 2018
Summary
Researchers explored metal contacts with two-dimensional C2N, finding that Aluminum (Al) and Scandium (Sc) form ideal Ohmic contacts with monolayer C2N. Silver (Ag) also shows promise for practical applications due to its low resistance.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Two-dimensional (2D) materials offer unique electronic properties.
- C2N is a novel, low-cost, metal-free 2D semiconductor.
- Efficient charge injection is crucial for 2D electronic devices.
Purpose of the Study:
- Investigate metal contacts with monolayer (ML) and bilayer (BL) C2N.
- Analyze interface properties to identify optimal electrode materials.
- Understand Fermi level pinning effects in C2N-metal systems.
Main Methods:
- First-principles calculations.
- Analysis of interface geometries and electronic structures.
- Evaluation of Fermi level pinning and contact resistance.
Main Results:
- Identified Al and Sc as forming Ohmic contacts with ML C2N due to strong interactions.
- Ohmic contacts also observed for C2N-Ag and BL C2N-Sc systems.
- C2N-Ag contacts exhibit lower resistance, making them attractive for applications.
Conclusions:
- Ohmic contacts are achievable with various metal electrodes on C2N.
- Interface properties dictate contact behavior.
- C2N-Ag contacts are promising for practical device implementation.
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