Correlations between Electrochemical Ion Migration and Anomalous Device Behaviors in Perovskite Solar Cells,ACS Energy Letters

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Correlations between Electrochemical Ion Migration and Anomalous Device Behaviors in Perovskite Solar Cells
ACS Energy Letters ( IF 19.3 ) Pub Date : 2021-02-16 , DOI: 10.1021/acsenergylett.0c02662
Jie Liu _{1,

2} , Mingyu Hu ₁ , Zhenghong Dai ₁ , Wenxiu Que ₂ , Nitin P. Padture ₁ , Yuanyuan Zhou _{1,

3}

Affiliation

Ion migration is a solid-state electrochemical phenomenon widely observed in the family of halide perovskite materials, which is attributed to their intrinsically soft ionic crystal structures and mixed electronic–ionic conduction properties. Numerous studies in the literature have indicated that ion migration is the major cause of various anomalous device behaviors, including light-soaking effect, photocurrent–voltage hysteresis, and slow open-circuit voltage decay, which are commonly observed in perovskite solar cells. Herein we present a comprehensive review on these studies. We also provide a mechanistic understanding, featuring the built-in electrical field as a key factor for the elucidation of ion migration and associated device behaviors in a consistent manner. Finally, we discuss future research directions toward a better understanding of these phenomena.

中文翻译：

钙钛矿型太阳能电池中电化学离子迁移与异常器件行为的相关性

离子迁移是一种在固态钙钛矿卤化物材料中广泛观察到的固态电化学现象，这归因于其固有的软离子晶体结构和混合的电子离子传导特性。大量文献研究表明，离子迁移是导致各种异常器件行为的主要原因，包括光吸收效应，光电流-电压滞后和缓慢的开路电压衰减，这在钙钛矿型太阳能电池中很常见。本文中，我们对这些研究进行了全面的回顾。我们还提供了一种机械的理解，将内置电场作为以一致方式阐明离子迁移和相关设备行为的关键因素。最后，

更新日期：2021-03-12

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