Beyond Ion Migration in Metal Halide Perovskites: Toward a Broader Photoelectrochemistry Perspective,ACS Energy Letters

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Beyond Ion Migration in Metal Halide Perovskites: Toward a Broader Photoelectrochemistry Perspective
ACS Energy Letters ( IF 19.3 ) Pub Date : 2024-09-03 , DOI: 10.1021/acsenergylett.4c02033
Zhaojian Xu ₁ , Ross A. Kerner ₂ , Leeor Kronik ₃ , Barry P. Rand _{1,

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Affiliation

Ion migration is a broad term used to account for the degradation of halide perovskite materials and devices. However, ion mobility is only one piece of the full picture─mobile ions/defects are first created, then transported, and eventually annihilated or immobilized. In this Perspective, we summarize emerging work that shows how tractable photochemical and Faradaic reactions provide a continuous source of ions to migrate. Furthermore, we discuss strategies to fundamentally manipulate ion migration by targeting specific electrochemical and reduction/oxidation mechanisms. This highlights the important role of defect photoelectrochemistry, as well as the soft nature of the perovskite lattice, in ion migration and self-healing. We conclude that distinguishing more detailed processes involved in “ion migration”, with an emerging focus on the reactions that form mobile ionic defects, is necessary to greatly improve the stability of devices and open up more technological applications.

中文翻译：

超越金属卤化物钙钛矿中的离子迁移：迈向更广泛的光电化学视角

离子迁移是一个广泛的术语，用于解释卤化物钙钛矿材料和器件的降解。然而，离子淌度只是整个图景的一部分——移动的离子/缺陷首先被产生，然后被传输，最后被湮灭或固定。在本视角中，我们总结了新兴的工作，这些工作展示了易于处理的光化学和法拉第反应如何提供连续的离子源迁移。此外，我们讨论了通过针对特定的电化学和还原/氧化机制从根本上操纵离子迁移的策略。这凸显了缺陷光电化学以及钙钛矿晶格的柔软性质在离子迁移和自修复中的重要作用。我们的结论是，区分“离子迁移”中涉及的更详细的过程，并逐渐关注形成移动离子缺陷的反应，对于大大提高设备的稳定性和开辟更多的技术应用是必要的。

更新日期：2024-09-03

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