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The two faces of capacitance: New interpretations for electrical impedance measurements of perovskite solar cells and their relation to hysteresis
Journal of Applied Physics
Perovskite solar cells are notorious for exhibiting transient behaviour not seen in conventional inorganic semiconductor devices. Significant inroads have been made into understanding this fact in terms of rapid ion migration, now a well-established property of the prototype photovoltaic perovskite MAPbI_3 and strongly implicated in the newer mixed compositions. Here we study the manifestations of ion migration in frequency-domain small-signal measurements, focusing on the popular technique ofdoi:10.1063/1.5063259 fatcat:cugn2agppzh63novc4gn36hjwm