Characterization of 2D α-MoO3 microcrystals deposited by pulsed laser deposition based process

Abstract

2D-Transition Metal oxides (TMOs), although less studied than the well-known 2D transition metal dichalcogenides(2D-TMCs) are appealing due to some specific advantages. Like the TMCs they are semiconductors, however they are less contaminant and offer a large potential for tuning their electro-optical properties by varying their stoichiometry. In particular, MoO3 is transparent and shows a wide bandgap (>3 eV) and a high dielectric constant k ~ 500. Additionally, orthorhombic α-MoO3 possesses the well-known layered crystal structure of MoO3 which offers the possibility to create two dimensional (2D) morphologies (de Castro et al., 2020). In this context, 2D MoO3 has shown extraordinary properties such as anisotropic polariton propagation (Ma et al, 2019) and is an ideal material for electronic applications for high power electronics and short wavelength optoelectronics.