Fig. 2: Compositional and electronic characterisations of the synthesised monolayer SnS.
From: Liquid metal-based synthesis of high performance monolayer SnS piezoelectric nanogenerators
a Sn 3d XPS spectra deconvoluted and fitted to show the typical peaks of Sn2+ binding energies at 485.9 and 494.3 eV. b S 2p XPS spectra deconvoluted and fitted to show peaks at binding energies of 161.2 and 162.5 eV c XPS valence band spectrum indicating the energy difference between the Fermi level and the valence band maximum is ~0.6 eV. d PESA spectrum where it is observed that the Fermi energy level is ~4.7 eV below vacuum (cps-counts s−1). e Tauc plot converted from the UV-Visible spectroscopy indicates the optical bandgap as ~1.4 eV. f Hall resistance (Rxy) of the monolayer SnS as a function of the applied magnetic field (B) with optical image of six-terminal Hall device in the inset. g Resulting assessed electronic band structure system of monolayer SnS confirming p-type semiconducting nature.
