Electronic Properties of Silicene Films Subjected to Neutron Transmutation Doping

• Published in: Semiconductors (Woodbury, N.Y.) N.Y.), 2020-06, Vol.54 (6), p.641-649
• Main Authors: Galashev, A. E., Vorob’ev, A. S.
• Format: Article
• Language: English
• Subjects: Additives; Analysis; Batteries; Bilayers; Conductors; Crystal structure; Current carriers; Density of states; Doping; Electric properties; Electrodes; Electron density; Electronic properties; Electrons; Graphite; Lithium-ion batteries; Low-Dimensional Systems; Magnetic Materials; Magnetism; Monolayers; Phosphorus; Photovoltaic cells; Physics; Physics and Astronomy; Quantum Phenomena; Radiation; Rechargeable batteries; Residual stress; Semiconductor Structures; Semiconductors; Silicene; Single crystals; Solar cells; Substrates; Transmutation
• ISSN: 1063-7826; 1090-6479
• DOI: 10.1134/S1063782620060068

The radiation doping of single-crystal silicon with phosphorus retains the structure of the sample, reduces internal stresses, and increases the lifetime of minority charge carriers. The study is concerned with the effect of phosphorus additives on the electronic properties of silicene. The electron density-of-states spectra of a phosphorus-doped single layer and 2 × 2 bilayer silicene on a graphite substrate are calculated by the quantum-mechanical method. The carbon substrate imparts semiconductor properties to silicene due to p – p hybridization. Doping with phosphorus can retain or modify the metal properties gained by silicene. The position of phosphorus dopant atoms in silicene influences the semiconductor–conductor transition. The theoretical specific capacity of a phosphorus-doped silicene electrode decreases, and the electrode becomes less efficient for application in lithium-ion batteries. However, the increase in the conductivity is favorable for use of this material in solar cells.