Carrier-Lattice Coupling Drives Oxidative Degradation in Mixed Tin-Lead Halide Perovskites: Machine Learning Combined with Nonadiabatic Molecular Dynamics.
The findings reveal that Sn oxidation is governed by carrier–lattice coupling through its control over the kinetic accessibility of Sn-centered hole localization, and they identify the suppression of VSn defects and the stabilization of I-rich surface terminations as key design principles for stable Sn–Pb perovskites.