石墨烯
掺杂剂
兴奋剂
材料科学
密度泛函理论
带隙
价(化学)
Atom(片上系统)
计算化学
纳米技术
化学
光电子学
计算机科学
嵌入式系统
有机化学
作者
Wen-Han Zhao,Fengyin Li,Hongxing Zhang,R. I. Eglitis,Jian Wang,Ran Jia
标识
DOI:10.1016/j.apsusc.2022.154895
摘要
In this theoretical study, the monolayer carbon allotrope, Me-graphene (also called C568), was respectively doped with Al, Si, P, and Ge atoms by substituting the sp3-hybridized carbon atom in its unit cell to manipulate its physical properties. Theoretical calculations based on the density functional theory (DFT) confirmed the dynamic stabilities of the related doping systems. Interestingly, the mechanical strengths of the doping systems are even stronger than the pristine one. After doping with Si atom, the band gap of the Me-graphene system narrowed from 1.097 eV to 0.987 eV estimated at HSE06 level. However, the Ge-dopant at the sp3-site has very limited influence on the band gap. In the other two cases with Al and P dopants, the systems changed to be metallic because their Fermi levels cut into the valence bands to a certain extent. Additionally, the adsorption sites of Li atoms and the energy profiles of the Li migrations on the related 2D material systems were also investigated in order to reveal their application potentials as anodes in lithium-ion batteries (LIBs).
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