Maximizing Merits of Undesirable δ-FAPbI3 by Constructing yellow/black Heterophase Bilayer for Efficient and Stable Perovskite Photovoltaics,Advanced Functional Materials

当前位置： X-MOL 学术 › Adv. Funct. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Maximizing Merits of Undesirable δ-FAPbI3 by Constructing yellow/black Heterophase Bilayer for Efficient and Stable Perovskite Photovoltaics
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-08-10 , DOI: 10.1002/adfm.202204642
Jiafeng Zhang _{1,

2} , Xiaoqing Jiang ₁ , Xiaotao Liu _{1,

3} , Xin Guo ₁ , Can Li ₁

Affiliation

Yellow-phase formamidinium lead iodide (δ-FAPbI₃) as a degradation product of black perovskite phase is usually unwelcome in perovskite solar cells (PSCs). However, it also shows high potential in passivating defects and protecting perovskite films from moisture intrusion due to its water-stable nature. Herein, the utilization of δ-FAPbI₃ to construct a yellow/black heterophase bilayer is reported, in which the perovskite layer is shielded by in situ formed δ-FAPbI₃ species on the surface, for PSCs with enhanced efficiency and stability. It is found that the δ-FAPbI₃ layer with a broader bandgap than the black-phase perovskite can efficiently suppress the charge recombination at the interface, offering a high PSC efficiency of 23.10%. More importantly, the δ-FAPbI₃-modified devices exhibit preferable stability against various external stresses to that of the control ones. Compared to those using the disliked δ-FAPbI₃ in the literature, the strategy, which maximizes its merits in reducing the interfacial charge recombination and stabilizing the perovskite structure, is more simple yet effective to realize highly efficient and stable PSCs.

中文翻译：

通过构建黄色/黑色异相双层来最大化不希望的 δ-FAPbI3 的优点，以实现高效稳定的钙钛矿光伏发电

黄色相甲脒碘化铅（δ-FAPbI ₃）作为黑色钙钛矿相的降解产物，在钙钛矿太阳能电池（PSC）中通常不受欢迎。然而，由于其水稳定性，它在钝化缺陷和保护钙钛矿薄膜免受水分侵入方面也显示出很高的潜力。本文报道了利用δ-FAPbI ₃构建黄色/黑色异相双层，其中钙钛矿层被表面上原位形成的δ-FAPbI ₃物质屏蔽，用于提高效率和稳定性的PSC。发现δ-FAPbI ₃具有比黑相钙钛矿更宽的带隙的层可以有效地抑制界面处的电荷复合，提供23.10％的高PSC效率。更重要的是，δ-FAPbI ₃改性器件对各种外部应力的稳定性优于对照器件。与文献中使用不喜欢的δ-FAPbI ₃的策略相比，该策略最大限度地发挥其在减少界面电荷复合和稳定钙钛矿结构方面的优点，更简单有效地实现高效和稳定的PSC。

更新日期：2022-08-10

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南