期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 14, 期 5, 页码 1140-1147出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.2c03876
关键词
-
A versatile method of constructing a surface multi-cationic heterojunction is introduced to achieve an efficient and stable CsPbI1.5Br1.5 perovskite solar cell. The heterojunction layer can effectively passivate surface defects, reduce optical loss, improve energy-level alignment, and reduce interfacial charge recombination loss. The resulting solar cell exhibits a PCE of 14.11% and retains 85% of its initial efficiency after 1000 hours of storage.
All-inorganic CsPbI1.5Br1.5 perovskite solar cells are considered as top cell candidates for tandem cells as a result of their excellent thermal stability and photoelectric performance. However, their power conversion efficiencies (PCEs) are still low and far below the theoretical limit mainly as a result of the severe non-radiative recombination and optical loss. Herein, we introduce an versatile method to construct a surface multi-cationic heterojunction to achieve an efficient and stable CsPbI1.5Br1.5 perovskite solar cell. By precisely controlling the content of FA(+) and MA(+) on PbBr2-rich perovskite films, a high-quality heterojunction layer is formed to help effectively passivate the surface defects and reduce the optical loss of the CsPbI1.5Br1.5 perovskite. In addition, the incorporation of a heterojunction layer can also improve energy-level alignment and reduce interfacial charge recombination loss. As a result, the champion device with the incorporation of SMH exhibits a PCE of 14.11%, which presents the highest reported efficiency for inorganic CsPbI1.5Br1.5 solar cells thus far while retaining 85% of the initial efficiency after 1000 h of storage without encapsulation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据