In this paper, we show that strain gradients can greatly affect the total photovoltaic efficiency of perovskite solar cells. By adding the flexophotovoltaic effect on top of the standard photovoltaic effect of semiconductor junctions, the total output of perovskite photovoltaic devices can be either completely suppressed or greatly enhanced, depending on the relative sign of the strain gradient with respect to the semiconductor junction polarity. The results thus indicate that, whether as a threat to efficiency or as a means to enhance it, strain gradients can greatly affect the performance of perovskite solar cells, and flexoelectric engineering is thus an indispensable step in the pursuit of maximal photovoltaic efficiency.

中文翻译：

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应变梯度诱导的光伏效率调制


在本文中，我们表明应变梯度可以极大地影响钙钛矿太阳能电池的总光伏效率。通过在半导体结的标准光伏效应之上添加柔性光伏效应，钙钛矿光伏器件的总输出可以被完全抑制或大大增强，这取决于应变梯度相对于半导体结极性的相对符号。因此，结果表明，无论是作为对效率的威胁还是作为提高效率的手段，应变梯度都会极大地影响钙钛矿太阳能电池的性能，因此挠曲电工程是追求最大光伏效率不可或缺的步骤。