Visualising ionic screening in perovskite solar cells: a bumpy ride along the <i>J</i>-<i>V</i> curve.

ABSTRACT: The current density-voltage (J-V) curve of perovskite solar cells (PSCs) commonly depends on the voltage scanning rate and direction, due to the presence of mobile ionic charges which screen the electric field, lowering the total driving force for charge extraction. In this study, experimental data and drift-diffusion simulations are combined to provide new insights into scan rate dependent J-V curves, focusing on triple mesoscopic carbon-based PSCs (CPSCs), which show a distinct current overshoot ('bump') in the backward scan which had not been fully explained until now. Additionally, the thickness optimisation problem in CPSCs is shown to be governed by the ionic distribution, which determines the ability to collect charge photogenerated in the ZrO₂

SUBMITTER: Torre Cachafeiro MA 

PROVIDER: S-EPMC12394794 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature