Resolving Oxidation States and <i>X</i> –site Composition of Sn Perovskites through Auger Parameter Analysis in XPS (Adv. Mater. Interfaces 7/2023)

Resolving Chemical States in Sn-Based Perovskites In article 2201828, Alexander Wieczorek, Sebastian Siol, and colleagues demonstrate how Auger parameter analysis enables more reliable chemical state of Sn-based perovskites. Through systematic compositional variation a high sensitivity this on the X-site composition oxidation perovskites is demonstrated. The latter aspect can be used to detect understand aging these compounds under ambient conditions. This approach easily adopted using standard XPS equipment better reproducibility results across laboratories. [Artwork by Wieczorek]