Unraveling the Key Relationship Between Perovskite Capacitive Memory, Long Timescale Cooperative Relaxation Phenomena, and Anomalous <i>J</i> – <i>V</i> Hysteresis

Capacitive response at long time scales seems to remain an elusive feature in the analysis of electrical properties perovskite-based solar cells. It belongs one critical anomalous effects that arises from characteristic phenomenology this type emerging photovoltaic devices. Thereby, accurately deducing key capacitance new light harvesting perovskites measurements represents a significant challenge regarding interpretation physical processes and control undesired mechanisms, such as slow dynamic and/or current density–voltage (J–V) hysteresis. Herein, it is shown timescale mechanisms give rise hysteresis stable high-efficiency quadruple-cation are not due classical capacitive behavior sense ideal charge accumulation processes. Instead, phenomenological consequence memory-based currents underlying cooperative relaxations. A fractional dynamics approach, based on idea distribution perovskite devices, reliably models transient phenomena consequent scan-rate- bias-dependent Observable for wide variety halide perovskites, distributed rather universal phenomena, which can be related long-time