碳纳米管
材料科学
电致发光
辐射
热的
热辐射
激发
横截面
非平衡态热力学
光电子学
凝聚态物理
纳米技术
光学
物理
气象学
工程类
热力学
结构工程
量子力学
图层(电子)
作者
Zu-Quan Zhang,Jiansheng Wang
出处
期刊:Physical review
日期:2021-08-20
卷期号:104 (8)
被引量:2
标识
DOI:10.1103/physrevb.104.085422
摘要
Bias-induced light emission and thermal radiation from conducting channels of carbon nanotubes (CNTs) with defects are studied theoretically within the framework of nonequilibrium Green's function method based on a tight-binding model. Localized states induced by the single vacancy defect and single Stone-Wales defect in the low energy range enhance electroluminescence significantly while they reduce thermal radiation under zero bias. The influence of the diameters of the CNTs with defects on the radiation is discussed. Different from the 2D or bulk materials, the radiation intensities from quasi-one-dimensional metallic CNTs in thermal equilibrium are much smaller than that of the black-body radiation. We attribute this to the confinement of thermal excitation in the transverse direction of the CNT. Our study is important for optoelectronic applications of CNTs with defects.
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