Metallo‐Hydrogel‐Assisted Synthesis and Direct Writing of Transition Metal Dichalcogenides

Journal Article · Thu May 09 00:00:00 EDT 2019 · Advanced Functional Materials

DOI:https://doi.org/10.1002/adfm.201807612· OSTI ID:1511758

Zang, Xining ^[1]; Hohman, J. Nathan ^[2]; Yao, Kaiyuan ^[3]; Ci, Penghong ^[4]; Yan, Aiming ^[5]; Wei, Minsong ^[6]; Hayasaka, Takeshi ^[6]; Zettl, Alex ^[7]; Schuck, P. James ^[8]; Wu, Junqiao ^[4]; Lin, Liwei ^[6]

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1. Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA 02139 USA, Mechanical Engineering University of California Berkeley Berkeley CA 94704 USA
2. Molecular Foundry Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
3. Mechanical Engineering University of California Berkeley Berkeley CA 94704 USA, Mechanical Engineering Columbia University New York City NY 10027 USA
4. Materials Science and Engineering University of California Berkeley Berkeley CA 94704 USA
5. Physics Department University of California Berkley Berkeley CA 94704 USA, Material Science Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
6. Mechanical Engineering University of California Berkeley Berkeley CA 94704 USA
7. Physics Department University of California Berkley Berkeley CA 94704 USA, Material Science Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA, Kavli Energy NanoSciences Institute at University of California Berkeley and Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
8. Molecular Foundry Lawrence Berkeley National Laboratory Berkeley CA 94720 USA, Mechanical Engineering Columbia University New York City NY 10027 USA

Abstract

Two dimensional (2D) transition metal dichalcogenides (TMDCs) have attracted interest for their compelling nanoscale new properties and numerous potential applications including fast optoelectronic devices, ultrathin photovoltaics, and high‐performance catalysts. Large‐scale growth of uniform TMDC materials is essential for investigating their physics and for their integration into devices. However, the wafer scale deposition of TMDCs on arbitrary nonselective substrates is still beyond the current state‐of‐the‐art. In this article, a method to synthesize layered TMDCs (MoS ₂ and WS ₂ ) at the wafer‐scale by sulfurization of transition metal ions (Mo ⁵⁺ and W ⁶⁺ ) in a gelatin template (metallo‐hydrogel) is reported. This process is adaptable to versatile substrates, including amorphous silicon oxide, high‐temperature quartz, and silicon. Although the products are nominally few layer materials, direct band photoluminescent (≈1.8 eV), similar to single‐ or decoupled multilayer MoS ₂ is observed. Finally, the solution‐based deposition enables contact printing of TMDC channels to be useable for device applications including thin film transistors with printed silver contacts using the same process.

• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1511758
• Journal Information: Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 27 Vol. 29; ISSN 1616-301X
• Publisher: Wiley Blackwell (John Wiley & Sons)
• Country of Publication: Germany
• Language: English