Enhanced field emission behaviour from ethylene glycol mediated synthesis of 2D hexagonal SnS2 disc with nanoparticle decoration

Abstract

Herein, octahedron and stacked 2D hexagonal disc - like nanostructures of SnS2 were obtained by hydrothermal and ethylene glycol mediated hydrothermal methods, respectively. Attempt has been made to shade light on the plausible growth mechanism. Liquid phase exfoliation followed by centrifugation process leads to presence of tiny single crystalline SnS2 nanoparticles (∼5 nm) on the hexagonal discs over C substrate, characterized by preferred growth along {0 0 1} direction. The observed Raman shift and enhanced intensities of A1g and Eg modes infer charge interactions between the SnS2 disc and C substrate. Interestingly, the SnS2-C emitter exhibited superior field emission (FE) behaviour due to the unique morphology, excellent charge transfer, and reduced work function (∼4.1 eV). Here the extraction of large current density of ∼1137 μA/cm2 at an applied field of 3.72 V/μm, with good emission current stability. The present strategy is beneficial to design architectured morphology for multi-functionality.