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

中文翻译：

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揭示钙钛矿电容记忆，长时间协作放松现象和异常J–V滞后之间的关键关系

在钙钛矿型太阳能电池的电学性能分析中，长时间的电容响应似乎仍然是一个难以捉摸的特征。它属于由这种新兴光伏设备的特征现象学引起的严重异常效应之一。因此，从电学测量中准确推断出新的光收集钙钛矿的关键电容特征，对于解释物理过程和控制不良机制（例如缓慢的动态效应和/或电流密度-电压（J – V））磁滞。本文表明，在理想的电荷积累过程中，长时标机制在稳定且高效的四阳离子钙钛矿中会产生滞后现象，并不是由于经典的电容行为引起的。相反，这是基于记忆的缓慢电容性电流和潜在的协同松弛的现象学结果。基于钙钛矿器件中电容分布的思想，分数动力学方法可以可靠地对缓慢的瞬态现象以及随之而来的依赖于扫描速率和偏置的磁滞现象进行建模。对于各种各样的光伏卤化物钙钛矿都可以观察到，分布电容效应是相当普遍的异常现象，这可能与长期的电响应和磁滞有关。