期刊
ORGANIC ELECTRONICS
卷 27, 期 -, 页码 137-142出版社
ELSEVIER
DOI: 10.1016/j.orgel.2015.09.005
关键词
Boundary types; Rectifying behavior; Boron-nitride/graphene nanoribbon; heterojunctions
资金
- National Natural Science Foundation of China [61172039, 91227125]
- National Basic Research Program of China [2012CB932703]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20130161130004]
- Hunan Provincial Natural Science Foundation of China [12JJ2002]
We investigate the effect of boundary types on the rectifying behaviors in heterojunction composed of zigzag graphene and hexagonal boron-nitride (BNC) hybridized nanoribbons by employing nonequilibrium Green's functions in combination with the density-functional theory. The results demonstrate that the rectifying behavior is strongly dependent on the boundary types, while little affected by the width of BNC hybridized nanoribbons. It is noteworthy that the maximum rectifying ratio of the system at finite bias can be high up to orders of 107 in which atoms carbon in graphene nanoribbon are totally connected with atoms nitrogen in boron-nitride nanoribbon. The mechanism is proposed for these phenomena. (C) 2015 Elsevier B.V. All rights reserved.
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