Abstract
Abstract
Germanium selenide (GeSe) nanoribbons as quasi-one-dimensional materials are expected to host fascinating tunable electronic properties due to the edge state and quantum confinement effect. Herein, the effect on the electronic structures and transport properties of zigzag GeSe nanoribbon (ZGeSeNR) of different functional passivation groups is systematically studied using a combination of density functional theory and the non-equilibrium Green’s function. The N-, P-, and S-passivated ZGeSeNRs are metallic, while the F-, Cl-, OH-, and H-passivated ones exhibit semiconductor properties. The rectification behavior is found in lateral ZGeSeNR heterojunctions composed of a metal–semiconductor contact, and the rectification performance can be modulated by changing the edge passivation group, the ribbon width, and the length of the scattering region. Especially, the highest rectification ratio (RR) reaches 9.2
×
106 in the S–H–ZGeSeNR heterojunctions, in which the left and right half-edge atoms are passivated by the S and H groups, respectively. These results are useful for the design of nanoscale rectifiers based on ZGeSeNRs.
Funder
Key Scientific Research Projects of Higher Education Institutions in Henan Province
Henan Province Natural Science Foundation of Youth Fund
Natural National Science Foundation of China
Subject
Materials Chemistry,Electrical and Electronic Engineering,Condensed Matter Physics,Electronic, Optical and Magnetic Materials