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Inkjet-Printed Molybdenum Disulfide and Nitrogen-Doped Graphene Active Layer High On/Off Ratio Transistors.

ABSTRACT: Fully inkjet-printed device fabrication is a crucial goal to enable large-area printed electronics. The limited number of two-dimensional (2D) material inks, the bottom-gated structures, and the low current on/off ratio of thin-film transistors (TFTs) has impeded the practical applications of the printed 2D material TFTs. In the search for TFTs with high current ratios, we introduce a stable and efficient method of nitrogen-doped graphene (NDG) ink preparation for inkjet printing by liquid-phase exfoliation. The NDG thin film is print-stacked with molybdenum disulfide (MoS₂) by multiple printing passes to construct a MoS₂-NDG stack. We demonstrate top-gated fully inkjet-printed MoS₂-NDG transistors with silver drain, source, and gate electrodes, and a barium titanate (BaTiO₃) dielectric. A 100% inkjet-printed MoS₂-NDG vertical 2D active heterostructure layer transistor with a current on/off ratio of 1200 is exhibited. The results may lead towards the development of all-printed 2D material-based transistor switches.

SUBMITTER: Jewel MU

PROVIDER: S-EPMC7179098 | biostudies-literature |

REPOSITORIES: biostudies-literature

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