Please use this identifier to cite or link to this item: http://cmuir.cmu.ac.th/jspui/handle/6653943832/57887
Title: First Principles Study of Electronic Band Structure and Structural Stability of Al<inf>2</inf>C Monolayer and Nanotubes
Authors: S. Pramchu
A. P. Jaroenjittichai
Y. Laosiritaworn
Keywords: Physics and Astronomy
Issue Date: 20-Oct-2017
Abstract: © Published under licence by IOP Publishing Ltd. We used density functional theory (DFT) based on generalized gradient approximation (GGA) and hybrid functional (HSE06) to investigate band gap and structural stability of Al2C monolayer and nanotubes. From the results, both GGA and HSE06 band gaps of Al2C monolayer agree well with previously reported data. For the Al2C nanotubes, we found that their band gaps are more sensitive to the size and the chirality than that of the widely studied SiC2nanotubes, indicating the Al2C nanotubes may have higher band gap tuning capabilities (with varying diameter size and chirality) compared with those of SiC2nanotubes. We have also discovered a desirable direct band gap in the case of (n,0) nanotubes, although Al2C monolayer band gap is indirect. The calculated strain energy reveals that (n,0) nanotubes constructed by wrapping up Al2C monolayer consume less energy than (0,n) nanotubes. Thus, (n,0) nanotubes is easier to synthesize than (0,n) nanotubes. This discovery of direct band gap in (n,0) Al2C nanotubes and their adjustable band gap suggests them as promising sensitizer for enhancing power conversion efficiency of excitonic solar cells.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85034062540&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/57887
ISSN: 17426596
17426588
Appears in Collections:CMUL: Journal Articles

Files in This Item:
There are no files associated with this item.


Items in CMUIR are protected by copyright, with all rights reserved, unless otherwise indicated.