Single-molecule rectifiers based on voltage-dependent deformation of molecular orbitals in carbazole oligomers

Ryo Yamada, Ken Albrecht, Tatsuhiko Ohto, Keigo Minode, Kimihisa Yamamoto, Hirokazu Tada

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


Current-voltage characteristics of single molecule junctions are governed both by the energy level alignment of molecular orbitals with respect to the Fermi level of the electrodes and by the hybridization of electronic structures at the interface between the molecule and the electrodes. While there have been many studies on tuning the former, only a few works intended to control the latter. In the present study, we demonstrate that molecular junctions based on carbazole oligomers showed a current rectification behavior due to asymmetric-symmetric control of electronic hybridization between the molecule and electrodes at the both terminals. The carbazole oligomers originally showed an asymmetric molecular orbital and, hence, electronic hybridization with the electrodes because of the electric dipole moment. Symmetric electronic hybridization was achieved when the applied electric field between electrodes deformed molecular orbital to be symmetric. This is a novel way to control charge transport in single-molecule junctions.

Original languageEnglish
Pages (from-to)19818-19824
Number of pages7
Issue number42
Publication statusPublished - Nov 14 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science


Dive into the research topics of 'Single-molecule rectifiers based on voltage-dependent deformation of molecular orbitals in carbazole oligomers'. Together they form a unique fingerprint.

Cite this