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Fluorinated benzalkylsilane molecular rectifiers

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abstract
We report on the synthesis and electrical properties of nine new alkylated silane self-assembled monolayers (SAMs) – (EtO)3Si(CH2)nN = CHPhX where n = 3 or 11 and X = 4-CF3, 3,5-CF3, 3-F-4-CF3, 4-F, or 2,3,4,5,6-F, and explore their rectification behavior in relation to their molecular structure. The electrical properties of the films were examined in a metal/insulator/metal configuration, with a highly-doped silicon bottom contact and a eutectic gallium-indium liquid metal (EGaIn) top contact. The junctions exhibit high yields (>90%), a remarkable resistance to bias stress, and current rectification ratios (R) between 20 and 200 depending on the structure, degree of order, and internal dipole of each molecule. We found that the rectification ratio correlates positively with the strength of the molecular dipole moment and it is reduced with increasing molecular length.
subject
energy
materials for devices
contributor
Lamport, Z.A. (author)
Broadnax, A.D. (author)
date
2020-02-25T20:38:04Z (accessioned)
2020-02-25T20:38:04Z (available)
11/29/16 (issued)
identifier
Lamport, Z. A., Broadnax, A. D., Harrison, D., Barth, K. J., Mendenhall, L., Hamilton, C. T., ... & Jurchescu, O. D. (2016). Fluorinated benzalkylsilane molecular rectifiers. Scientific reports, 6, 38092. (citation)
https://doi.org/10.1038/srep38092 (doi)
http://hdl.handle.net/10339/95993 (uri)
language
en (iso)
publisher
SpringerNature
rights
https://creativecommons.org/licenses/by/4.0/ (uri)
source
Scientific Reports
title
Fluorinated benzalkylsilane molecular rectifiers
type
Article

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