Figure 4.
(a) XPS exploratory spectra and (b) high resolution XPS spectra of Sn. High resolution spectra for Cs, Pb, and Br can be found in Figure S9.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.