First principle design of CdS/germanene heterostructures with tunable electronic and transport properties

Two dimensional (2D) materials have received a great deal of attention and becoming increasingly essential in exploitation and application for future electronic, optical and energy devices.In this paper, we systematically researched electronic and transport properties of the interface between the CdS monolayer and germanene monolayer, by means of first-principles calculations based on the DFT. CdS/germanene heterostructures exibit desirable electronic, optical and transport properties. More specifically, we find that the band structures, light absorption, conductivity of CdS/germanene can be widely tuned by applying mechanical deformation. These remarkable characteristics are highly desirable to apply on solar cell, photodiode, phototriode, strain sensor, field effect transistor et al. ectronic and optoelectronic devices.