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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Modelling J?V hysteresis in perovskite solar cells induced by voltage poling
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Modelling J?V hysteresis in perovskite solar cells induced by voltage poling

机译：用电压抛光诱导的钙钛矿太阳能电池模拟J？V滞后

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摘要

We present an extension of the dynamic electrical model, which enable us to explain some important features of the perovskite solar cells (PSC), like the shape of the hysteresis and the appearance of the ?bump? in the so called reverse scan, without requiring any additional assumptions. We give analytical expressions in terms of the Lambert?s function W for the open circuit voltage, the stationary current, and the instantaneous current, which can be written also in terms of elementary functions for the most part of the ranges of the physical parameters. The initial polarization of the cell, modeled as the charging of a capacitor with voltage dependent capacitance, is consistently determined in the model, from the initial stationary conditions. This is inline with a previously observed sharp increase of the PSC capacitance beyond the open-circuit voltage. Besides the known features, we obtain characteristics that were not yet analyzed experimentally, like the change of the bump from the reverse scan branch of the J?V characteristic to the forward scan, with the increase of the poling voltage (or the increase of the PSC capacitance).
机译：我们展示了动态电气模型的延伸，使我们能够解释钙钛矿太阳能电池（PSC）的一些重要特征，如滞后形状和凹凸的外观？在所谓的反向扫描中，不需要任何额外的假设。我们在Lambert函数W对于开路电压，静止电流和瞬时电流提供分析表达，该静止电流和瞬时电流也可以在物理参数的大部分范围内的基本功能方面写入。作为具有电压相关电容的电容器的充电建模的单元的初始偏振，从初始静止条件中一致地确定。这是内联的，先前观察到超出开路电压的PSC电容的急剧增加。除了已知的特征之外，我们获得了实验尚未分析的特征，如从j？v特征的反向扫描分支到正向扫描的凸起的变化，随着极化电压的增加（或增加PSC电容）。

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