期刊
CHEM
卷 7, 期 9, 页码 2513-2526出版社
CELL PRESS
DOI: 10.1016/j.chempr.2021.07.011
关键词
-
资金
- MOST [2016YFA0200703]
- NSFC [21727807, 21833006, 21931009]
This study investigates the phase transition process of FA-based perovskites and identifies a key intermediate, providing insights into the phase evolution and stabilization mechanism. The findings deepen the understanding of the roles of cations and anions in maximizing halogen and cage concentrations, and offer suggestions for fabricating high-performance and stable PCSs by controlling various factors.
FAPbI(3) (FA(+) = formamidinium) perovskite, one of the most efficient basic components in nowadays perovskite solar cells (PCSs), undergoes spontaneous phase transition whilemolecular-level investigations are still lacking. Here, we report a structural study on the phase transition process of the FA-based perovskites based on isolation and identification of a series of single crystal intermediates. A key intermediate of 8H phase with unique structure is discovered, which helps elucidate the complete phase evolution and stabilization mechanism of FA-based perovskites. Our new insight based on the Pauling's rules not only deepens the understanding of the phase stabilization roles of cations and anions in maximizing the concentrations of corner-sharing halogens and cubic cages but also forms suggestion for fabrication of high-performance and long-term stable PCSs by controlling the factors such as composition, precursor solution, stoichiometry, and additives.
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