Device Modelling of Perovskite Solar Cells using Small Perturbation Methods

Perovskite solar cells (PSCs) have shown large power conversion efficiencies in the laboratory, comparable to Silicon-based solar cells, in a very short time since their inception. However, a major impediment to their commercialization is their low stability in ambient environmental conditions and low tolerance to humidity. This instability is deeply connected to the mixed ionic-electronic conduction in PSCs, which is manifested in the hysteresis observed in current-voltage curves of the PSC, which depends strongly on external parameters of measurement. Therefore, this thesis aims to develop a holistic electrical model of PSCs using kinetic information to understand recombination, charge accumulation and transport of electronic carriers and ions.