Hybrid Perovskite, CH₃NH₃PbI₃, for Solar Applications: An Experimental and Theoretical Analysis of Substitution in A and B Sites

Figure 2

X-ray photoelectron spectra: (a) general; (b) Pb 4f; (c) I 3d; and (d) N 1s, for the sample with .

(a)

(b)

(c)

(d)