Please use this identifier to cite or link to this item:
Title: Stability and electronic structure of hydrogen passivated few atomic layer silicon films : a theoretical exploration
Authors: Wang, Shudong
Zhu, Liyan
Chen, Qian
Wang, Jinlan
Ding, Feng
Subjects: Density functional theory
Elemental semiconductors
Energy gap
Semiconductor thin films
Issue Date: 1-Mar-2011
Publisher: American Institute of Physics
Source: Journal of applied physics, 1 Mar. 2011, v. 109, no. 5, 053516, p. 1-5.
Abstract: The stability, electronic, and optical properties of two dimensional hydrogenated few atomic layer silicon (H-FLSi) are systematically studied with density functional theory calculations. The formation energy of H-FLSi decreases with increasing layer thickness and approaches zero at the thickness of double layer, suggesting that this material is energetically favorable and thus its experimentally synthesizing is feasible. Its bandgap decreases with the increase of the thickness and eventually approaches the value of bulk silicon. More interestingly, the bandgap of hydrogenated silicon films can be tuned by external electric field and even becomes metal. Importantly, the light absorption threshold and absorption peak of the H-Si mono- and bilayer locate in different energy regions and both move toward higher energy region as compared with those of the bulk silicon.
Rights: © 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in S. Wang et al., J. Appl. Phys. 109, 053516 (2011) and may be found at
Type: Journal/Magazine Article
DOI: 10.1063/1.3553838
ISSN: 0021-8979 (print)
1089-7550 (online)
Appears in Collections:ITC Journal/Magazine Articles

Files in This Item:
File Description SizeFormat 
Wang_Stability_electronic_structure.pdf2.16 MBAdobe PDFView/Open

All items in the PolyU Institutional Repository are protected by copyright, with all rights reserved, unless otherwise indicated. No item in the PolyU IR may be reproduced for commercial or resale purposes.