Distinct Charge Transport and its Regulation in Single‐Molecule and Monolayer Junctions
Abstract
Abstract As electronic devices miniaturize to the nanometer scale, molecular junctions, including single and monolayer molecules, are gaining attention for applications in logic, storage, and sensing. However, comparative studies of charge transport in these two junction types are limited. Here, a highly conjugated pyrene derivative has been engineered to construct both single‐molecule and monolayer junctions. The charge transport within these junctions has been examined systematically through theoretical simulations and electrical measurements. These studies demonstrate a distinct transition in a single molecule from temperature‐independent coherent tunneling to temperature‐dependent incoherent transport, indicating vibration‐mediated transport, while vibration‐suppressed coherent transport is observed in a densely packed monolayer. Additionally, anisotropic gating experiments reveal that parallel fields relative to the molecular connection modulate energy levels more efficiently in comparison with perpendicular fields. These findings enrich our understanding of molecular electronic transport and pave the way for diverse developments in the field of molecular electronic devices.
Article Details
Authors (10)
Lan Yang
School of Pharmaceutical Sciences
Cong Zhao
Ju Wang
State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Life Sciences, Northwest A&F University
Feifan Yue
Center of Single‐Molecule Sciences Institute of Modern Optics Frontiers Science Center for New Organic Matter Tianjin Key Laboratory of Microscale Optical Information Science and Technology College of Electronic Information and Optical Engineering Nankai University 38 Tongyan Road Jinnan District Tianjin 300350 P.R. China
Zhehao He
Mingliang Li
Guangwu Li
Center of Single-Molecule Sciences, Institute of Modern Optics, Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology, College of Electronic Information and Optical Engineering
Jinying Wang
Center of Single-Molecule Sciences, Institute of Modern Optics, Frontiers Science Center for New Organic Matter, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, College of Electronic Information and Optical Engineering, Nankai University, 38 Tongyan Road, Jinnan District, Tianjin 300350, P. R. China
Chuancheng Jia
Center of Single-Molecule Sciences, Institute of Modern Optics, Frontiers Science Center for New Organic Matter, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, College of Electronic Information and Optical Engineering, Nankai University, 38 Tongyan Road, Jinnan District, Tianjin 300350, P. R. China
Xuefeng Guo
State Key Laboratory of Coordination Chemistry, Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Jiangsu Key Laboratory of Clean Energy Catalysis and Intelligent Green Chemical Engineering, School of Chemistry and Chemical Engineering