Intercalation and hybrid heterostructure integration of two-dimensional atomic crystals with functional organic semiconductor molecules

Wen He, Han Zang, Songhua Cai, Zhangyan Mu, Cheng Liu, Mengning Ding, Peng Wang, Xinran Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Van der Waals (vdW) integration affords semiconductor heterostructures without constrains of lattice matching and opens up a new realm of functional devices by design. A particularly interesting approach is the electrochemical intercalation of two-dimensional (2D) atomic crystal and formation of superlattices, which can provide scalable production of novel vdW heterostructures. However, this approach has been limited to the use of organic cations with non-functional aliphatic chains, therefore failed to take the advantage of the vast potentials in molecular functionalities (electronic, photonic, magnetic, etc.). Here we report the integration of 2D crystal (MoS2, WS2, highly oriented pyrolytic graphite (HOPG), WSe2 as model systems) with electrochemically inert organic molecules that possess semiconducting characteristics (including perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA), pentacene and fullerene), through on-chip electrochemical intercalation. An unprecedented long-range spatial feature of intercalation has been achieved, which allowed facile assembly of a vertical MoS2-PTCDA-Si junction. The intercalated heterostructure shows significant modulation of the lateral transport, and leads to a molecular tunneling characteristic at the vertical direction. The general intercalation of charge neutral and functional molecules defines a versatile platform of inorganic/organic hybrid vdW heterostructures with significantly extended molecular functional building blocks, holding great promise in future design of nano/quantum devices. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)2917-2924
Number of pages8
JournalNano Research
Volume13
Issue number11
DOIs
Publication statusPublished - 1 Nov 2020

Keywords

  • electrochemical intercalation
  • inorganic/organic heterostructure
  • organic semiconductor
  • perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA)
  • transition metal dichalcogenide

ASJC Scopus subject areas

  • Materials Science(all)
  • Electrical and Electronic Engineering

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