Relaxation Between Bright Optical Wannier Excitons in Perovskite Solar Absorber CH${}_3$NH${}_3$PbI${}_3$

Ravindra Nanguneri, John Parkhill

We study the light-absorbing states of the mixed-halide perovskite CH${}_3$NH${}_3$PbI${}_2$Cl and tri-iodide perovskite CH${}_3$NH${}_3$PbI${}_3$ with density functional and many-body…