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Improving Gating Efficiency of Electron Transport through Redox‐Active Molecular Junctions with Conjugated Chains
Author(s) -
Zhang Fan,
Wu XiaoHui,
Zhou YiFan,
Wang YaHao,
Zhou XiaoShun,
Shao Yong,
Li JianFeng,
Jin Shan,
Zheng JuFang
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201902076
Subject(s) - gating , conductance , electron transport chain , molecular electronics , conjugated system , chemical physics , molecular orbital , materials science , redox , electrochemistry , nanotechnology , molecular switch , electrode , fermi level , chemistry , electron , molecule , inorganic chemistry , physics , polymer , biophysics , condensed matter physics , organic chemistry , biochemistry , quantum mechanics , composite material , biology
Tuning the electron transport at the molecular scale is a key step in realizing functional electronic components for molecular electronics, and ongoing interest aims at achieving a higher modulation ratio for single‐molecular transistors. Here, a feasible strategy that connects the redox‐active moieties with conjugated chains is proposed to improve the electrochemical gating efficiency of molecular junctions in ionic liquid. Benefiting from the low energy barrier height between the Fermi level of the electrode and the frontier molecular orbitals, the conductance of C=C−Fc−Py is about one order of magnitude larger and the conductance on/off ratio shows 160 % improvement compared to that of C−C−Fc−Py at the equilibrium potential of Fc + /Fc. This work provides a new way to design high‐performance molecular devices.