Fig. 5: Evolution of photoelectric properties from MoS2/WS2 bilayer heterostructure to MoS2[O2]x/WS2[O2]x superlattice heterostructure.
From: 2D atomic crystal molecular superlattices by soft plasma intercalation
a Schematic illustration and typical optical images of the MoS2[O2]x/WS2[O2]x superlattice heterostructure. b Ids − Vds curves of the MoS2[O2]x/WS2[O2]x superlattice heterostructure photodetector under 532 nm laser illumination with different power intensities. Inset is the energy band diagram of the MoS2[O2]x/WS2[O2]x superlattice heterostructure. c, d The time-resolved photoresponse of both MoS2/WS2 bilayer heterostructure (before the plasma intercalation) and corresponding MoS2[O2]x/WS2[O2]x superlattice heterostructure (after the optimum plasma intercalation) under c Vds = −1 V (reverse bias) and d Vds = 1 V (forward bias) with 532 nm (1.74 mW) illumination.
