Electronic properties of borophene based heterojunctions with MoS2 and WSe2

The electronic and optical properties of vertical delta 6-borophene/MoS2(WSe2) heterojunctions are investigated by density functional theory. It is found that vertical delta 6-borophene/MoS2(WSe2) heterojunctions present different electronic properties. Particularly, the different stacking directions of delta(6)-borophene influence the electronic properties of the heterojunctions, showing its anisotropic characteristics. The external electric field can adjust the Schottky contact type and Schottky barrier height of the heterojunction. Compared with monolayer MoS2 and WSe2, the stacked heterojunctions expand the range and sensitivity of photoconductivity. This suggests that the stack changes the electronic and optical properties of the monolayer MoS2 and WSe2, and the external electric field causes a changed Schottky contact, thereby providing a possibility for the design of optoelectronic devices with tunable Schottky contact and good optical characteristics.