Electrical and optical properties of a small capped (5, 0) zigzag Carbon nanotube by B, N, Ge and Sn atoms: DFT theoretical calculation

Document Type: Reasearch Paper

Authors

1 Department of Physics, Science and Research Branch, Islamic Azad University, Tehran, Iran

2 Nano-Optoelectronics Lab, Sheykh Bahaee Research Complex, Science and Research Branch, Islamic Azad University, Tehran, Iran

3 Department of Chemistry, University of Qom, Qom, Iran

10.7508/ijnd.2016.04.008

Abstract

In this study we investigate the effect of atoms such as B, N, Ge and Sn on the optical and the electrical properties of capped (5, 0) zigzag carbon nanotube, using DFT calculation method. These elements were attached to the one end of the carbon nanotube. We considered four different structure designs as possible candidates for a p-n junction device. The electrical properties of these structures were investigated using the quantum chemical information analysis which leads to the energy band gap, dipole moments, electrical charges and the DOS of these structures. Further TD-DFT calculations were performed to obtain the optical properties of the structure designs to investigate the electron mobility, indicating higher conductivity and higher rectifying voltage in the CNT terminated by Sn.

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Main Subjects


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