Surface Passivation Suppresses Local Ion Motion in Halide Perovskites

Justin Pothoof, Robert J. E. Westbrook, Rajiv Giridharagopal +2

We use scanning probe microscopy to study ion migration in the formamidinium (FA)-containing halide perovskite semiconductor $C{s}_{0.22}F{A}_{0.78}Pb(I_{0.85}B{r}_{0.15}{)}_3$ in the pres…