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Device Physics of the Carrier Transporting Layer in Planar Perovskite Solar Cells

机译：平面钙钛矿太阳能电池载流子传输层的器件物理

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摘要

Perovskite solar cells (PVSCs) have emerged as a promising candidate for addressing the energy crisis due to their rapid efficiency improvement up to 24.2% within 10 years. The defects existing in perovskite film have been found to be as low as 10(15) cm(-3) indicating that the bulk nonradiative recombination loss is very small. The major efficiency loss has been attributed to inefficient carrier transportation and collection, particularly at the interfaces of the carrier transport layers (CTLs). Moreover, the mobile ions that can penetrate into or be blocked by the CTLs have been considered to play a significant role in the determination of device efficiency and stability. The further improvement of the PVSC performances relies on interfacial engineering. Meanwhile, it is highly desirable to gain an in-depth physical understanding of interfacial engineering in PVSCs. Herein, the recent works on CTLs in planar PVSCs are reviewed and the device physics for designing high-performance PVSCs is unveiled. This work describes the (1) materials and strategies for efficient CTLs; (2) effects of mobile ions and the influence of CTLs; and (3) theoretical modeling and understanding of PVSCs. This work can, therefore, contribute to designing and improving high-performance PVSCs for future practical commercialized applications.
机译：钙钛矿太阳能电池（PVSC）已成为解决能源危机的有前途的候选者，因为它们的效率在10年内迅速提高了24.2％。已经发现钙钛矿膜中存在的缺陷低至10（15）cm（-3），表明整体非辐射复合损失非常小。主要的效率损失已归因于载流子运输和收集效率低下，尤其是在载流子运输层（CTL）的界面处。此外，已经认为可以渗透到CTL中或被CTL阻止的移动离子在确定设备效率和稳定性方面起着重要作用。 PVSC性能的进一步提高依赖于界面工程。同时，非常需要对PVSC中的界面工程有深入的物理了解。在此，对平面PVSC中CTL的最新工作进行了回顾，并揭示了设计高性能PVSC的器件物理原理。这项工作描述（1）有效CTL的材料和策略； （2）流动离子的影响和CTL的影响； （3）对PVSC的理论建模和理解。因此，这项工作可有助于设计和改进高性能PVSC，以用于将来的实际商业化应用。

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