Figure 7
From: Two-dimensional CsPbI3/CsPbBr3 vertical heterostructure: a potential photovoltaic absorber
Plots of change in (a) real and (b) imaginary parts of dielectric constants, (c) optical absorption (here inset shows first peak edges of all the structures), (d) reflectivity, (e) refractive indices and (f) extinction coefficient along with increase in incoming photon energy for CsPbI3 monolayer, CsPbBr3 monolayer, HS1, HS2, HS3 and HS4, respectively. Here the heterostructures possess 3 × 3 × 1 constituent monolayer therefore in order to show comparison we have plotted optical properties of optimized 3 × 3 × 1 pristine CsPbI3 and CsPbBr3 monolayers.
