Insight to perovskite solar cell hysteresis, time constants and degradation from the impedance and transient response
Juan Bisquert a, Enrique Balaguera b
a Instituto de Tecnología Química (ITQ-UPV-CSIC), Universitat Politècnica de València (Spain)
b Universidad Rey Juan Carlos, Calle Tulipan s/n, Móstoles, Spain
Proceedings of MATSUS Fall 2025 Conference (MATSUSFall25)
A7 Simulation and Characterization of OptoElectroIonic Devices: Performance, Degradation Mechanisms and Stability - #SimChar
València, Spain, 2025 October 20th - 24th
Organizers: Pilar López Varo and Sonia R. Raga
Invited Speaker, Juan Bisquert, presentation 156
Publication date: 21st July 2025

The study of perovskite solar cells degradation is a complex issue due to the multitude of phenomena that can contribute to it. Recently, we have obtained new insights using a model that combines several electronic and ionic processes, that can produce capacitive and inductive response in different circumstances.1 These models are very successful to describe huge memory effects and hysteresis in perovskite memristors, by the combination of different techniques: current-voltage scan, time transients, and impedance spectroscopy.2-4 Here we show the changes of impedance spectroscopy and time transients as a diagnosis of hysteresis, time constants and evolution of degradation in the perovskite solar cells. Normally the degradation can produce two main impacts, decrease of charge collection (lowering photocurrent) or increase of recombination (lowering photovoltage). We need to find dynamical signatures of the phenomena causing these effects to discover the physical reasons for the devaluated performance.

Funded by the European Research Council (ERC) via Horizon Europe Advanced Grant, grant agreement nº 101097688 ("PeroSpiker").

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