Current–Voltage Characteristics of the Aziridine-Based Nano-Molecular Wires: a Light-Driven Molecular Switch

作     者：Ayoub Kanaani Mohammad Vakili Davood Ajloo Mehdi Nekoei 

作者机构：School of Chemistry Damghan University Department of Chemistry Faculty of Science Ferdowsi University of Mashhad Department of Chemistry Shahrood Branch Islamic Azad University 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2018年第35卷第4期

页      面：118-122页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：Supported by the Damghan University the Ferdowsi University of Mashhad and the Islamic Azad University of Shahrood 

主　　题：Current Voltage Characteristics of the Aziridine-Based Nano-Molecular Wires a Light-Driven Molecular Switch 

摘      要：Using nonequilibrium Green＇s function formalism combined first-principles density functional theory, we analyze the transport properties of a 4,4-dimethyl-6-（4-nitrophenyl）-2-phenyl-3,5-diaza-bicyclo[3.1.0]hex-2-ene molecular optical switch. The title molecule can convert between closed and open forms by visible or ultraviolet irradiation. The I-V characteristics, differential conductance, on-off ratio, electronic transmission coefficients, spatial distribution of molecular projected self-consistent Hamiltonian orbitals, HOMO-LUMO gaps, effect of electrode materials Y（111）（Y =Au, Ag and Pt） on electronic transport and different molecular geometries corresponding to the closed and open forms through the molecular device are discussed in detail. Based on the results, as soon as possible the open form translates to the closed form, and there is a switch from the ON state to the OFF state（low resistance switches to high resistance）. Theoretical results show that the donor/acceptor substituent plays an important role in the electronic transport of molecular devices. The switching performance can be improved to some extent through suitable donor and acceptor substituents.