Modulating the Optoelectronic Properties of MoS2by Highly Oriented Dipole-Generating Monolayers

Adam R. Brill, Alonit Kafri, Pranab K. Mohapatra, Ariel Ismach, Graham De Ruiter*, Elad Koren*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The noncovalent functionalization of two-dimensional materials (2DMs) with bespoke organic molecules is of central importance for future nanoscale electronic devices. Of particular interest is the incorporation of molecular functionalities that can modulate the physicochemical properties of the 2DMs via noninvasive external stimuli. In this study, we present the reversible modulation of the photoluminescence, spectroscopic properties (Raman), and charge transport characteristics of molybdenum disulfide (MoS2)-based devices via photoisomerization of a self-assembled monolayer of azobenzene-modified triazatriangulene molecules. The observed (opto)electronic modulations are explained by the n-type doping of the MoS2 lattice induced by the photoisomerization of the highly ordered azobenzene monolayer. This novel behavior could have profound effects on future composite 2DM-based (opto)electronics.

Original languageEnglish
Pages (from-to)32590-32597
Number of pages8
JournalACS Applied Materials and Interfaces
Issue number27
StatePublished - 14 Jul 2021


FundersFunder number
Taub Foundation
Technion Russell Berrie Nanotechnology Institute
Azrieli Foundation
Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology


    • 2D materials
    • FET
    • MoS
    • Raman spectroscopy
    • noncovalent functionalization
    • photoluminescence


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