First-principles density-functional calculations on the field emission properties of BN nanocones

被引：32
|
作者：
Qu, C. Q. [1 ,2 ]
Qiao, L. [1 ,2 ,3 ]
Wang, C. [1 ,2 ]
Yu, S. S. [1 ,2 ]
Zheng, W. T. [1 ,2 ]
Fu, Y. Z. [1 ,2 ]
Jiang, Q. [1 ,2 ]
机构：
[1] Jilin Univ, Dept Mat Sci, Changchun 130012, Peoples R China
[2] Jilin Univ, Key Lab Automobile Mat MOE, Changchun 130012, Peoples R China
[3] Changchun Univ, Coll Sci, Changchun 130022, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 2008年 / 146卷 / 9-10期
基金：
中国国家自然科学基金;
关键词：
boron nitride; field emission; first-principles calculations;
D O I：
10.1016/j.ssc.2008.03.030
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The first-principles density-functional theory is used to study the geometrical structures and field emission properties of different boron nitride nanocones with 240 degrees disclination. It is found that the nanocones can be stable under applied electric field and the emission current is sensitively dependent on the tips of nanocones. The nanocones with homonuclear bonds at the tip can introduce additional energy states near Fermi level, which can reduce the ionization potential and increase the emission current these boron nitride nanocones. This investigation indicates that the boron nitride nanocone can be a promising candidate as a field emission electron source. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：399 / 402
页数：4
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