TY - JOUR
T1 - Achieving Ultralow, Zero, and Inverted Tunneling Attenuation Coefficients in Molecular Wires with Extended Conjugation
AU - Lee, Hyun Ju
AU - Cho, Soo Jin
AU - Kang, Hungu
AU - He, Xin
AU - Yoon, Hyo Jae
N1 - Funding Information:
H.J.L., S.J.C., H.K., and X.H. contributed equally to this work. This research was supported by the NRF of Korea (NRF‐2019R1A2C2011003 and NRF‐2019R1A6A1A11044070).
Funding Information:
H.J.L., S.J.C., H.K., and X.H. contributed equally to this work. This research was supported by the NRF of Korea (NRF-2019R1A2C2011003 and NRF-2019R1A6A1A11044070).
Publisher Copyright:
© 2021 Wiley-VCH GmbH
PY - 2021/3/25
Y1 - 2021/3/25
N2 - Molecular tunnel junctions are organic devices miniaturized to the molecular scale. They serve as a versatile toolbox that can systematically examine charge transport behaviors at the atomic level. The electrical conductance of the molecular wire that bridges the two electrodes in a junction is significantly influenced by its chemical structure, and an intrinsically poor conductance is a major barrier for practical applications toward integrating individual molecules into electronic circuitry. Therefore, highly conjugated molecular wires are attractive as active components for the next-generation electronic devices, owing to the narrow highest occupied molecular orbital–lowest occupied molecular orbital gaps provided by their extended π-building blocks. This article aims to highlight the significance of highly conductive molecular wires in molecular electronics, the structures of which are inspired from conductive organic polymers, and presents a body of discussion on molecular wires exhibiting ultralow, zero, or inverted attenuation of tunneling probability at different lengths, along with future directions.
AB - Molecular tunnel junctions are organic devices miniaturized to the molecular scale. They serve as a versatile toolbox that can systematically examine charge transport behaviors at the atomic level. The electrical conductance of the molecular wire that bridges the two electrodes in a junction is significantly influenced by its chemical structure, and an intrinsically poor conductance is a major barrier for practical applications toward integrating individual molecules into electronic circuitry. Therefore, highly conjugated molecular wires are attractive as active components for the next-generation electronic devices, owing to the narrow highest occupied molecular orbital–lowest occupied molecular orbital gaps provided by their extended π-building blocks. This article aims to highlight the significance of highly conductive molecular wires in molecular electronics, the structures of which are inspired from conductive organic polymers, and presents a body of discussion on molecular wires exhibiting ultralow, zero, or inverted attenuation of tunneling probability at different lengths, along with future directions.
KW - highly conjugated molecular wires
KW - inverted attenuation
KW - molecular junctions
KW - ultralow tunneling attenuation
KW - weak length dependence
UR - http://www.scopus.com/inward/record.url?scp=85100496127&partnerID=8YFLogxK
U2 - 10.1002/smll.202005711
DO - 10.1002/smll.202005711
M3 - Review article
C2 - 33543557
AN - SCOPUS:85100496127
SN - 1613-6810
VL - 17
JO - Small
JF - Small
IS - 12
M1 - 2005711
ER -