Capacitance and Charging Transients at Interfaces in Hybrid Lead Halide Perovskites

CARAM, JORGE; GARCÍA-BATLLE MARISÉ; ALMORA OSBEL; ARCE, ROBERTO D.; GARCIA-BELMONTE GERMÁ

Berlin

Conferencia; NanoGe Fall Meeting; 2019

NanoGe- Fundació Scito specialized in the organization of scientific international events

Perovskite-based solar cells constitute a special type of light-harvesting devices, in addition to electronic mechanisms, the presence of moving ionic species is supposed to modify current-voltage curves. The local rearrangement of ions at the electrode interfaces gives rise to commonly observed capacitive effects. Here, we explore charging transients in response to step voltage stimuli using MAPbI3 samples deposited onto interdigitated metallic electrodes, and observe how the charging is governed by the local imbalance in the vicinity of the outer interfaces.