Perovskite solar cells (PSC) are promising next generation photovoltaic technologies, and there is considerable interest in the role of possible polarization of organic-inorganic halide perovskites (OIHPs) in photovoltaic conversion. The polarity of OIHPs is still hotly debated, however. In this review, we examine recent literature on the polarity of OIHPs from both theoretical and experimental points of view, and argue that they can be both polar and nonpolar, depending on composition, processing and environment. Implications of OIHP polarity to photovoltaic conversion are also discussed, and new insights gained through research efforts. In the future, integration of a local scanning probe with global macroscopic measurements in situ will provide invaluable microscopic insight into the intriguing macroscopic phenomena, while synchrotron diffractions and scanning transmission electron microscopy on more stable samples may ultimately settle the debate.

中文翻译：

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极性还是非极性？这不是钙钛矿太阳能电池的问题


钙钛矿太阳能电池（PSC）是有前途的下一代光伏技术，人们对有机-无机卤化物钙钛矿（OIHP）可能的极化在光伏转换中的作用非常感兴趣。然而，OIHP 的极性仍然存在激烈争论。在这篇综述中，我们从理论和实验的角度审视了有关 OIHP 极性的最新文献，并认为它们可以是极性的，也可以是非极性的，具体取决于成分、加工和环境。还讨论了 OIHP 极性对光伏转换的影响，并通过研究工作获得了新的见解。未来，局部扫描探针与原位全局宏观测量的集成将为有趣的宏观现象提供宝贵的微观洞察，而同步加速器衍射和更稳定样品上的扫描透射电子显微镜可能最终会解决这一争论。