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The Analysis Of Charge Transport Mechanism In Molecular Junctions Based On Current-voltage Characteristics

Xianneng Song, B. Han, X. Yu, W. Hu
Published 2020 · Chemistry

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Abstract We report here a theoretical model study of the current-voltage (I-V) characteristics of tunneling and hopping transport in molecular junctions. We found that the I-Vs of the two types of transport have very different shape characteristics. The I-V in tunneling transport is in near-linear relation at low bias, while is exponential for the hopping transport. The current in hopping transport thus can span a much wider range at semi-logarithm scale than tunneling transport, which can be used as an intuitive guide in analyzing the transport mechanism. The idea is supported by series of experimental studies reported before by Frisbie et al. where a clear I-V characteristic change can be seen when transport mechanism changed from tunneling to hopping. The two theoretical models were further used to fit the reported experimental I-V data, and we found that the transport mechanism obtained by the model is in consistence with the experimental conclusion. Moreover, our method also revealed the coexistence of two transports during the tunneling-to-hopping transition, and the contribution of the two channels to the current is bias dependent. Our research thus provides a new powerful theoretical method for the study of charge transport mechanism in molecular junctions.
This paper references
Low‐Voltage Current‐Voltage Relationship of Tunnel Junctions
J. Simmons (1963)
Thermally activated conduction in molecular junctions.
Y. Selzer (2004)
Exceptionally Small Statistical Variations in the Transport Properties of Metal-Molecule-Metal Junctions Composed of 80 Oligophenylene Dithiol Molecules.
Z. Xie (2017)
Mechanism of Electron Conduction in Self‐Assembled Alkanethiol Monolayer Devices
T. Lee (2003)
Real-time detection of redox events in molecular junctions.
R. Arielly (2014)
Revealing the role of anchoring groups in the electrical conduction through single-molecule junctions.
L. Zotti (2010)
From tunneling to hopping: a comprehensive investigation of charge transport mechanism in molecular junctions based on oligo(p-phenylene ethynylene)s.
Q. Lu (2009)
Correlating Electron Transport and Molecular Structure in Organic Thin Films.
R. Holmlin (2001)
Study on the Mechanism of Charge Tunneling and Hopping Transport in Ferrocene Self-Assembled Molecular Junctions†
Bin Han (2019)
Ambipolar transition voltage spectroscopy: Analytical results and experimental agreement
I. Bâldea (2012)
Electron Transfer Rates in Bridged Molecular Systems 2. A Steady-State Analysis of Coherent Tunneling and Thermal Transitions†
Dvira Segal and (2000)
Uncovering a law of corresponding states for electron tunneling in molecular junctions.
I. Bâldea (2015)
Charge-Transport Mechanisms in Azurin-Based Monolayer Junctions
Stephanie Valianti (2019)
Tunneling Conductance of Asymmetrical Barriers
W. Brinkman (1970)
Mechanisms of molecular electronic rectification through electronic levels with strong vibrational coupling
A. Kuznetsov (2002)
Field-induced conductance switching by charge-state alternation in organometallic single-molecule junctions.
F. Schwarz (2016)
Molecular transport junctions: vibrational effects
Michael Galperin (2006)
Rethinking transition voltage spectroscopy within a generic Taylor expansion view.
A. Vilan (2013)
Length-dependent conductance of conjugated molecular wires synthesized by stepwise "click" chemistry.
L. Luo (2010)
Analyzing Molecular Current-Voltage Characteristics with the Simmons Tunneling Model: Scaling and Linearization
A. Vilan (2007)
Molecular-Scale Electronics: From Concept to Function.
D. Xiang (2016)
On the relationship between molecular state and single electron pictures in simple electrochemical junctions.
A. Migliore (2012)
Long-range charge transport in single G-quadruplex DNA molecules.
G. Livshits (2014)
Chemical Dynamics in Condensed Phases: Relaxation, Transfer, and Reactions in Condensed Molecular Systems
A. Nitzan (2006)
Quantum Transport: Atom to Transistor
S. Datta (2004)
Transition from stochastic events to deterministic ensemble average in electron transfer reactions revealed by single-molecule conductance measurement
Y. Li (2019)
Experimental and Theoretical Analysis of Nanotransport in Oligophenylene Dithiol Junctions as a Function of Molecular Length and Contact Work Function.
Z. Xie (2015)
Nonlinear charge transport in redox molecular junctions: a Marcus perspective.
A. Migliore (2011)
Concepts in the design and engineering of single-molecule electronic devices
N. Xin (2019)
Transition from tunneling to hopping transport in long, conjugated oligo-imine wires connected to metals.
S. Choi (2010)
A Single-Level Tunnel Model to Account for Electrical Transport through Single Molecule- and Self-Assembled Monolayer-based Junctions
A. Garrigues (2016)
Molecular Electronics: An Introduction to Theory and Experiment
J. Cuevas (2010)
Molecular-wire behaviour in p -phenylenevinylene oligomers
W. B. Davis (1998)
Mechanisms of in Situ Scanning Tunnelling Microscopy of Organized Redox Molecular Assemblies
A. Kuznetsov (2000)
Covalently bonded single-molecule junctions with stable and reversible photoswitched conductivity
Chuancheng Jia (2016)
Molecular rectifier composed of DNA with high rectification ratio enabled by intercalation.
Cunlan Guo (2016)
Franck-Condon Blockade and Aggregation-Modulated Conductance in Molecular Devices Using Aggregation-Induced Emission-Active Molecules.
G. Tian (2019)
Transition from direct tunneling to field emission in metal-molecule-metal junctions.
Jeremy M. Beebe (2006)
Electrochemical Methods: Fundamentals and Applications
Allen J. Bard (1980)
Transition from direct to inverted charge transport Marcus regions in molecular junctions via molecular orbital gating
L. Yuan (2018)
Electrical Resistance of Long Conjugated Molecular Wires
Seong Ho Choi (2008)

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