Research Article

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2020, 13(11): 2917–2924

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https://doi.org/10.1007/s12274-020-2948-9

Intercalation and hybrid heterostructure integration of twodimensional atomic crystals with functional organic semiconductor molecules

Wen He1,§, Han Zang2,3,§, Songhua Cai2,4,5,§, Zhangyan Mu1, Cheng Liu1, Mengning Ding1 (✉), Peng Wang2,4,6 (✉), and Xinran Wang2,3 (✉)

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1 Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
2 National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
3 School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
4 Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
5 Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, 999077 Kowloon, Hong Kong, China
6 Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China
§ Wen He, Han Zang, and Songhua Cai contributed equally to this work.

Keywords: transition metal dichalcogenide, electrochemical intercalation, perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA), organic semiconductor, inorganic/organic heterostructure
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  • Abstract
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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.
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Intercalation and hybrid heterostructure integration of twodimensional atomic crystals with functional organic semiconductor molecules. Nano Res. 2020, 13(11): 2917–2924 https://doi.org/10.1007/s12274-020-2948-9

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