石墨烯纳米带中二芳基乙烯光敏分子的开关整流
Switching and Rectification of a Single Light-sensitive Diarylethene Molecule Sandwiched between Graphene Nanoribbons
摘要：
二芳基乙烯分子的“开放”和“封闭”异构体，可以在光激发时彼此之间转换，被发现具有显着不同的电流-电压特性时，夹在两个石墨烯纳米带（GNRs）。更重要的是，当一个GNR是金属性的而另一个是半导体性的时，观察到“封闭”二芳基乙烯异构体的强整流行为，整流比>10^3。令人惊讶的高整流比源于GNR的带隙和二芳基乙烯分子的最低未占分子轨道（LUMO）的偏压依赖性变化，其组合在正偏压下完全切断电流。本文的结果可能构成一类新的分子电子器件的基础。
英文摘要：
The 'open' and 'closed' isomers of the diarylethene molecule that can be converted between each other upon photo-excitation are found to have drastically different current-voltage characteristics when sandwiched between two graphene nanoribbons (GNRs). More importantly, when one GNR is metallic and another one is semiconducting, strong rectification behavior of the 'closed' diarylethene isomer with the rectification ratio >10^3 is observed. The surprisingly high rectification ratio originates from the band gap of GNR and the bias-dependent variation of the lowest unoccupied molecular orbital (LUMO) of the diarylethene molecule, the combination of which completely shuts off the current at positive biases. Results presented in this paper may form the basis for a new class of molecular electronic devices.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
