Resolving Oxidation States and X–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 analysis of Sn-based perovskites. Through systematic compositional variation a high sensitivity of this parameter on the X-site composition and oxidation state of Sn-based perovskites is demonstrated. The latter aspect can be used to detect and understand aging of these compounds under ambient conditions. This approach can be easily adopted using standard XPS equipment and enables better reproducibility of results across laboratories. [Artwork by Alexander Wieczorek]